| 1 | //! Side-git repository wrapper for workspace snapshots. |
| 2 | //! |
| 3 | //! `SnapshotRepo` shells out to the system `git` binary (we deliberately |
| 4 | //! avoid `git2` to dodge its LGPL surface). The two paths that matter: |
| 5 | //! |
| 6 | //! - `git_dir` → `~/.deepseek/snapshots/<project_hash>/<worktree_hash>/.git` |
| 7 | //! - `work_tree` → the user's actual workspace |
| 8 | //! |
| 9 | //! Every git invocation passes both `--git-dir` AND `--work-tree`. That is |
| 10 | //! the single biggest safety mechanism: it guarantees we never accidentally |
| 11 | //! mutate the user's own `.git` directory. If git can't find the side |
| 12 | //! repo, the command fails fast instead of falling back to "current |
| 13 | //! directory". |
| 14 | |
| 15 | use std::collections::HashSet; |
| 16 | use std::io; |
| 17 | use std::path::{Component, Path, PathBuf}; |
| 18 | use std::process::Output; |
| 19 | use std::time::{Duration, SystemTime, UNIX_EPOCH}; |
| 20 | |
| 21 | use crate::dependencies::ExternalTool; |
| 22 | |
| 23 | use super::paths::{ensure_snapshot_dir, snapshot_git_dir}; |
| 24 | |
| 25 | /// Identifier for a snapshot — currently the underlying git commit SHA. |
| 26 | #[derive(Debug, Clone, PartialEq, Eq)] |
| 27 | pub struct SnapshotId(pub String); |
| 28 | |
| 29 | impl SnapshotId { |
| 30 | /// Borrow the SHA as a string slice. |
| 31 | pub fn as_str(&self) -> &str { |
| 32 | &self.0 |
| 33 | } |
| 34 | } |
| 35 | |
| 36 | /// A single snapshot record (one row in `git log`). |
| 37 | #[derive(Debug, Clone)] |
| 38 | pub struct Snapshot { |
| 39 | /// Commit SHA inside the side repo. |
| 40 | pub id: SnapshotId, |
| 41 | /// Subject line — the label passed to [`SnapshotRepo::snapshot`]. |
| 42 | pub label: String, |
| 43 | /// Author timestamp (Unix seconds). |
| 44 | pub timestamp: i64, |
| 45 | /// Session this snapshot belongs to, when recorded (encoded as a |
| 46 | /// `[sid=...] ` label prefix). `None` for legacy snapshots taken |
| 47 | /// before session tagging existed. |
| 48 | pub session_id: Option<String>, |
| 49 | } |
| 50 | |
| 51 | /// Wrapper around the per-workspace side-git repo. |
| 52 | pub struct SnapshotRepo { |
| 53 | git_dir: PathBuf, |
| 54 | work_tree: PathBuf, |
| 55 | } |
| 56 | |
| 57 | const STALE_TMP_PACK_AGE: Duration = Duration::from_secs(60 * 60); |
| 58 | |
| 59 | /// Maximum total snapshot storage in megabytes before pruning kicks in at |
| 60 | /// snapshot time. Keeps the side repo from blowing up the user's disk during |
| 61 | /// long-running or high-churn sessions (#1112). |
| 62 | const MAX_SNAPSHOT_SIZE_MB: u64 = 500; |
| 63 | |
| 64 | const BYTES_PER_MB: u64 = 1024 * 1024; |
| 65 | |
| 66 | /// Grace margin below `MAX_SNAPSHOT_SIZE_MB` used as the prune target |
| 67 | /// so the repo doesn't hit the limit again one snapshot later. |
| 68 | const PRUNE_TARGET_MB: u64 = 400; |
| 69 | |
| 70 | /// Default workspace-size ceiling above which snapshots self-disable |
| 71 | /// on first use (2 GB of non-excluded content). Reports from users with |
| 72 | /// multi-hundred-GB project directories — datasets, model weights, |
| 73 | /// docker image dumps that fall outside the built-in excludes — |
| 74 | /// surfaced that `git add -A` on first init would hang the TUI for |
| 75 | /// minutes-to-hours while indexing the workspace. Snapshots are a |
| 76 | /// rollback safety net, not a backup tool; bailing out on workspaces |
| 77 | /// that big is the right tradeoff. Users with legitimate large |
| 78 | /// monorepos can raise `[snapshots] max_workspace_gb` (or set it to |
| 79 | /// `0` to disable the cap entirely). |
| 80 | pub const DEFAULT_MAX_WORKSPACE_BYTES_FOR_SNAPSHOT: u64 = 2 * 1024 * 1024 * 1024; |
| 81 | |
| 82 | /// Hard cap on the number of file entries the bounded size estimator |
| 83 | /// will inspect before declaring the workspace "too large". Protects |
| 84 | /// against a workspace with millions of tiny files (no individual |
| 85 | /// file is large, but `git add -A` would still take forever). |
| 86 | const SIZE_WALK_MAX_ENTRIES: usize = 200_000; |
| 87 | |
| 88 | /// Top-level directory and extension patterns that the snapshot path |
| 89 | /// already excludes via `BUILTIN_EXCLUDES`. The estimator skips these |
| 90 | /// up front so the size walk reflects what would actually land in the |
| 91 | /// snapshot commit. Kept narrow to common build-output dirs — anything |
| 92 | /// else falls back to the `.gitignore` filter. |
| 93 | const SIZE_WALK_SKIP_DIRS: &[&str] = &[ |
| 94 | "node_modules", |
| 95 | "target", |
| 96 | "dist", |
| 97 | "build", |
| 98 | ".build", |
| 99 | ".next", |
| 100 | ".nuxt", |
| 101 | ".svelte-kit", |
| 102 | ".turbo", |
| 103 | ".parcel-cache", |
| 104 | "vendor", |
| 105 | ".cargo", |
| 106 | ".rustup", |
| 107 | ".npm", |
| 108 | ".bun", |
| 109 | ".yarn", |
| 110 | ".pnpm-store", |
| 111 | ".cache", |
| 112 | ".venv", |
| 113 | "venv", |
| 114 | ".tox", |
| 115 | "__pycache__", |
| 116 | ".mypy_cache", |
| 117 | ".pytest_cache", |
| 118 | ".ruff_cache", |
| 119 | ".gradle", |
| 120 | ".m2", |
| 121 | ".local", |
| 122 | ".git", |
| 123 | ]; |
| 124 | |
| 125 | const BUILTIN_EXCLUDES: &str = "\ |
| 126 | # CodeWhale built-in snapshot exclusions |
| 127 | node_modules/ |
| 128 | target/ |
| 129 | dist/ |
| 130 | build/ |
| 131 | .build/ |
| 132 | .next/ |
| 133 | .nuxt/ |
| 134 | .svelte-kit/ |
| 135 | .turbo/ |
| 136 | .parcel-cache/ |
| 137 | vendor/ |
| 138 | .cargo/ |
| 139 | .rustup/ |
| 140 | .npm/ |
| 141 | .bun/ |
| 142 | .yarn/ |
| 143 | .pnpm-store/ |
| 144 | .cache/ |
| 145 | .venv/ |
| 146 | venv/ |
| 147 | .tox/ |
| 148 | __pycache__/ |
| 149 | *.pyc |
| 150 | .mypy_cache/ |
| 151 | .pytest_cache/ |
| 152 | .ruff_cache/ |
| 153 | .gradle/ |
| 154 | .m2/ |
| 155 | .local/ |
| 156 | .DS_Store |
| 157 | |
| 158 | # Binary and generated artifacts. Snapshots are source rollback checkpoints, |
| 159 | # not a full binary backup; keeping these out avoids side-repo bloat. |
| 160 | *.exe |
| 161 | *.dll |
| 162 | *.so |
| 163 | *.dylib |
| 164 | *.wasm |
| 165 | *.o |
| 166 | *.obj |
| 167 | *.class |
| 168 | *.pdb |
| 169 | *.dSYM |
| 170 | *.zip |
| 171 | *.tar |
| 172 | *.tar.gz |
| 173 | *.tgz |
| 174 | *.tar.bz2 |
| 175 | *.tar.xz |
| 176 | *.7z |
| 177 | *.rar |
| 178 | *.iso |
| 179 | *.dmg |
| 180 | *.bin |
| 181 | *.mp4 |
| 182 | *.mov |
| 183 | *.mkv |
| 184 | *.avi |
| 185 | *.webm |
| 186 | *.mp3 |
| 187 | *.wav |
| 188 | *.flac |
| 189 | *.aac |
| 190 | "; |
| 191 | |
| 192 | impl SnapshotRepo { |
| 193 | /// Open an existing snapshot repo for `workspace` without creating or |
| 194 | /// initializing anything on disk. |
| 195 | /// |
| 196 | /// This is useful for read-only UI surfaces that want to report checkpoint |
| 197 | /// availability without paying the first-init size walk or surprising the |
| 198 | /// user by creating a side repo from a view action. |
| 199 | pub fn open_existing(workspace: &Path) -> io::Result<Option<Self>> { |
| 200 | let work_tree = workspace |
| 201 | .canonicalize() |
| 202 | .unwrap_or_else(|_| workspace.to_path_buf()); |
| 203 | let git_dir = snapshot_git_dir(&work_tree); |
| 204 | if !git_dir.exists() || !git_dir.join("HEAD").exists() { |
| 205 | return Ok(None); |
| 206 | } |
| 207 | Ok(Some(Self { git_dir, work_tree })) |
| 208 | } |
| 209 | |
| 210 | /// Open or initialize the snapshot repo for `workspace`. |
| 211 | /// |
| 212 | /// On first use this: |
| 213 | /// 1. Creates the `~/.deepseek/snapshots/<…>/.git` dir. |
| 214 | /// 2. Runs `git init --bare=false --quiet`. |
| 215 | /// 3. Sets a fixed `user.name` / `user.email` so commits don't pick up |
| 216 | /// the user's global git identity (we don't want our snapshots to |
| 217 | /// look like they came from the user). |
| 218 | pub fn open_or_init(workspace: &Path) -> io::Result<Self> { |
| 219 | Self::open_or_init_with_cap(workspace, DEFAULT_MAX_WORKSPACE_BYTES_FOR_SNAPSHOT) |
| 220 | } |
| 221 | |
| 222 | /// Variant of [`Self::open_or_init`] that accepts an explicit |
| 223 | /// workspace-size cap. `cap_bytes = 0` disables the cap entirely |
| 224 | /// (always snapshot, regardless of size). |
| 225 | /// |
| 226 | /// When the workspace exceeds the cap and the side repo hasn't |
| 227 | /// been initialized yet, returns `Err(InvalidInput)` with a |
| 228 | /// "workspace too large" reason. Subsequent calls (after the user |
| 229 | /// shrinks the workspace or raises the cap via config) succeed. |
| 230 | pub fn open_or_init_with_cap(workspace: &Path, cap_bytes: u64) -> io::Result<Self> { |
| 231 | let work_tree = workspace |
| 232 | .canonicalize() |
| 233 | .unwrap_or_else(|_| workspace.to_path_buf()); |
| 234 | if let Some(reason) = unsafe_workspace_snapshot_reason( |
| 235 | &work_tree, |
| 236 | crate::config::effective_home_dir().as_deref(), |
| 237 | ) { |
| 238 | return Err(io::Error::new( |
| 239 | io::ErrorKind::InvalidInput, |
| 240 | format!( |
| 241 | "workspace snapshots are disabled for {reason}: {}", |
| 242 | work_tree.display() |
| 243 | ), |
| 244 | )); |
| 245 | } |
| 246 | |
| 247 | let _ = ensure_snapshot_dir(&work_tree)?; |
| 248 | let git_dir = snapshot_git_dir(&work_tree); |
| 249 | |
| 250 | let needs_init = !git_dir.exists(); |
| 251 | if needs_init { |
| 252 | // First-init size guard. Skipping this on subsequent opens |
| 253 | // is intentional: paying a workspace walk on every snapshot |
| 254 | // would defeat the purpose of the cap, and a workspace |
| 255 | // that fit on first init is allowed to grow within the |
| 256 | // existing repo's `MAX_SNAPSHOT_SIZE_MB` budget. Users on |
| 257 | // workspaces that grew past the cap mid-session get the |
| 258 | // existing aggressive-pruning path in `snapshot()`. |
| 259 | if estimate_workspace_size_bounded(&work_tree, cap_bytes).is_none() { |
| 260 | return Err(io::Error::new( |
| 261 | io::ErrorKind::InvalidInput, |
| 262 | format!( |
| 263 | "workspace too large for snapshots (over {} GB of non-excluded content or > {} entries): {}\n raise `[snapshots] max_workspace_gb` in config.toml (or set it to 0 to disable the cap) if you want snapshots on this workspace.", |
| 264 | cap_bytes / (1024 * 1024 * 1024), |
| 265 | SIZE_WALK_MAX_ENTRIES, |
| 266 | work_tree.display() |
| 267 | ), |
| 268 | )); |
| 269 | } |
| 270 | let parent = git_dir.parent().ok_or_else(|| { |
| 271 | io::Error::new(io::ErrorKind::InvalidInput, "snapshot dir has no parent") |
| 272 | })?; |
| 273 | std::fs::create_dir_all(parent)?; |
| 274 | // `git init` here uses the parent directory as the work tree |
| 275 | // and stores metadata in `.git`. We then continue to use |
| 276 | // explicit `--git-dir` / `--work-tree` flags for every other |
| 277 | // command so behaviour is invariant of cwd. |
| 278 | let init = crate::dependencies::Git::command() |
| 279 | .ok_or_else(|| io_other("git not found on PATH"))? |
| 280 | .arg("init") |
| 281 | .arg("--quiet") |
| 282 | .arg(parent) |
| 283 | .output() |
| 284 | .map_err(|e| io_other(format!("failed to spawn git init: {e}")))?; |
| 285 | if !init.status.success() { |
| 286 | return Err(io_other(format!( |
| 287 | "git init failed: {}", |
| 288 | String::from_utf8_lossy(&init.stderr).trim() |
| 289 | ))); |
| 290 | } |
| 291 | |
| 292 | // Pin a stable identity so snapshot commits are recognisable |
| 293 | // and don't bleed into the user's git config. |
| 294 | let _ = run_git( |
| 295 | &git_dir, |
| 296 | &work_tree, |
| 297 | &["config", "user.name", "deepseek-snapshots"], |
| 298 | ); |
| 299 | let _ = run_git( |
| 300 | &git_dir, |
| 301 | &work_tree, |
| 302 | &["config", "user.email", "snapshots@codewhale.local"], |
| 303 | ); |
| 304 | // Don't auto-gc on every commit; we manage pruning ourselves. |
| 305 | let _ = run_git(&git_dir, &work_tree, &["config", "gc.auto", "0"]); |
| 306 | // Ignore CRLF rewriting — we want byte-for-byte fidelity. |
| 307 | let _ = run_git(&git_dir, &work_tree, &["config", "core.autocrlf", "false"]); |
| 308 | } |
| 309 | |
| 310 | write_builtin_excludes(&git_dir)?; |
| 311 | if let Err(err) = cleanup_stale_pack_temps(&git_dir, STALE_TMP_PACK_AGE) { |
| 312 | tracing::debug!( |
| 313 | target: "snapshot", |
| 314 | "failed to clean stale snapshot tmp_pack files: {err}" |
| 315 | ); |
| 316 | } |
| 317 | Ok(Self { git_dir, work_tree }) |
| 318 | } |
| 319 | |
| 320 | /// Take a snapshot of the current working tree. |
| 321 | /// |
| 322 | /// Internally: `git add -A`, `git write-tree`, `git commit-tree`, then |
| 323 | /// `git update-ref HEAD <commit>`. |
| 324 | /// `git add -A` honours the user's workspace ignore rules while staging |
| 325 | /// into the side repo's index. |
| 326 | /// |
| 327 | /// Before committing, checks whether the snapshot directory exceeds |
| 328 | /// [`MAX_SNAPSHOT_SIZE_MB`] and prunes the oldest snapshots if it does. |
| 329 | /// |
| 330 | /// Returns the snapshot's commit SHA. |
| 331 | #[allow(dead_code)] // convenience entry kept for tests and legacy callers; production writes go through snapshot_with_session |
| 332 | pub fn snapshot(&self, label: &str) -> io::Result<SnapshotId> { |
| 333 | self.snapshot_with_session(label, None) |
| 334 | } |
| 335 | |
| 336 | /// Take a snapshot, tagging it with the owning session id. |
| 337 | /// |
| 338 | /// The session id is encoded into the commit message as a `[sid=...] ` |
| 339 | /// label prefix. [`Self::list`] decodes it back into |
| 340 | /// [`Snapshot::session_id`] and strips the prefix from the visible |
| 341 | /// label, so existing listing surfaces keep showing the plain label. |
| 342 | /// Legacy snapshots taken through [`Self::snapshot`] carry no prefix |
| 343 | /// and decode with `session_id == None`. |
| 344 | pub fn snapshot_with_session( |
| 345 | &self, |
| 346 | label: &str, |
| 347 | session_id: Option<&str>, |
| 348 | ) -> io::Result<SnapshotId> { |
| 349 | // Guard against disk blowup (#1112): if the snapshot directory has |
| 350 | // grown beyond the limit, prune aggressively before adding more. |
| 351 | // When the prune actually destroys restore points the user is told |
| 352 | // once per workspace — losing undo history to a log line is the S5 |
| 353 | // failure mode (2026-08-04 snapshot hunt). |
| 354 | if let Ok(removed) = self.prune_size_pressure( |
| 355 | MAX_SNAPSHOT_SIZE_MB * BYTES_PER_MB, |
| 356 | PRUNE_TARGET_MB * BYTES_PER_MB, |
| 357 | ) && removed > 0 |
| 358 | { |
| 359 | notify_snapshot_history_pruned_once(&self.work_tree, removed); |
| 360 | } |
| 361 | // Stage every tracked + untracked path the workspace exposes. |
| 362 | // `--all` here means `add` + `update` + `remove` — the same set |
| 363 | // `git status` would show. |
| 364 | let add = run_git(&self.git_dir, &self.work_tree, &["add", "-A"])?; |
| 365 | if !add.status.success() { |
| 366 | return Err(io_other(format!( |
| 367 | "git add -A failed: {}", |
| 368 | String::from_utf8_lossy(&add.stderr).trim() |
| 369 | ))); |
| 370 | } |
| 371 | |
| 372 | let tree = run_git(&self.git_dir, &self.work_tree, &["write-tree"])?; |
| 373 | if !tree.status.success() { |
| 374 | return Err(io_other(format!( |
| 375 | "git write-tree failed: {}", |
| 376 | String::from_utf8_lossy(&tree.stderr).trim() |
| 377 | ))); |
| 378 | } |
| 379 | let tree = String::from_utf8_lossy(&tree.stdout).trim().to_string(); |
| 380 | |
| 381 | let parent = run_git( |
| 382 | &self.git_dir, |
| 383 | &self.work_tree, |
| 384 | &["rev-parse", "--verify", "HEAD"], |
| 385 | )?; |
| 386 | let parent = parent |
| 387 | .status |
| 388 | .success() |
| 389 | .then(|| String::from_utf8_lossy(&parent.stdout).trim().to_string()) |
| 390 | .filter(|s| !s.is_empty()); |
| 391 | |
| 392 | let mut args = vec!["commit-tree".to_string(), tree]; |
| 393 | if let Some(parent) = parent { |
| 394 | args.push("-p".to_string()); |
| 395 | args.push(parent); |
| 396 | } |
| 397 | args.push("-m".to_string()); |
| 398 | args.push(Self::encode_session_label(label, session_id)); |
| 399 | let arg_refs: Vec<&str> = args.iter().map(String::as_str).collect(); |
| 400 | |
| 401 | // `commit-tree` creates marker commits even when the tree matches its |
| 402 | // parent, and it does not run user/global commit hooks. |
| 403 | let commit = run_git(&self.git_dir, &self.work_tree, &arg_refs)?; |
| 404 | if !commit.status.success() { |
| 405 | return Err(io_other(format!( |
| 406 | "git commit-tree failed: {}", |
| 407 | String::from_utf8_lossy(&commit.stderr).trim() |
| 408 | ))); |
| 409 | } |
| 410 | let sha = String::from_utf8_lossy(&commit.stdout).trim().to_string(); |
| 411 | |
| 412 | let update = run_git( |
| 413 | &self.git_dir, |
| 414 | &self.work_tree, |
| 415 | &["update-ref", "HEAD", &sha], |
| 416 | )?; |
| 417 | if !update.status.success() { |
| 418 | return Err(io_other(format!( |
| 419 | "git update-ref HEAD failed: {}", |
| 420 | String::from_utf8_lossy(&update.stderr).trim() |
| 421 | ))); |
| 422 | } |
| 423 | |
| 424 | Ok(SnapshotId(sha)) |
| 425 | } |
| 426 | |
| 427 | /// Prefix a snapshot label with its owning session id, if any. |
| 428 | fn encode_session_label(label: &str, session_id: Option<&str>) -> String { |
| 429 | match session_id { |
| 430 | Some(sid) if !sid.is_empty() => format!("[sid={sid}] {label}"), |
| 431 | _ => label.to_string(), |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | /// Split a possibly session-tagged label back into `(session_id, label)`. |
| 436 | /// |
| 437 | /// Returns `(None, label)` for untagged labels. The decoded label is |
| 438 | /// the original one without the `[sid=...] ` prefix, so consumers that |
| 439 | /// match on `pre-turn:`/`tool:`/`redo:` prefixes keep working unchanged. |
| 440 | fn decode_session_label(label: &str) -> (Option<String>, String) { |
| 441 | let Some(rest) = label.strip_prefix("[sid=") else { |
| 442 | return (None, label.to_string()); |
| 443 | }; |
| 444 | let Some(end) = rest.find("] ") else { |
| 445 | return (None, label.to_string()); |
| 446 | }; |
| 447 | let sid = &rest[..end]; |
| 448 | let plain = &rest[end + 2..]; |
| 449 | if sid.is_empty() || plain.is_empty() { |
| 450 | return (None, label.to_string()); |
| 451 | } |
| 452 | (Some(sid.to_string()), plain.to_string()) |
| 453 | } |
| 454 | /// Size-pressure prune (#1112): if the side repo exceeds `max_bytes`, |
| 455 | /// walk backward from a 1-second retention toward zero until the store is |
| 456 | /// at or under `target_bytes`, escalating to a full wipe when nothing |
| 457 | /// else helps. Returns the total number of snapshots destroyed, so the |
| 458 | /// caller can tell the user their undo history shrank (S5 — the wipe was |
| 459 | /// previously announced only by a `tracing::warn`). |
| 460 | fn prune_size_pressure(&self, max_bytes: u64, target_bytes: u64) -> io::Result<usize> { |
| 461 | let current_bytes = dir_size_bytes(&self.git_dir)?; |
| 462 | if current_bytes <= max_bytes { |
| 463 | return Ok(0); |
| 464 | } |
| 465 | tracing::warn!( |
| 466 | target: "snapshot", |
| 467 | current_mb = current_bytes / BYTES_PER_MB, |
| 468 | limit_mb = max_bytes / BYTES_PER_MB, |
| 469 | "snapshot storage approaching limit — pruning aggressively" |
| 470 | ); |
| 471 | let mut removed_total: usize = 0; |
| 472 | // Walk backward from a 1-second retention to zero until |
| 473 | // we're under the target, or until there's nothing left. |
| 474 | let mut age = Duration::from_secs(1); |
| 475 | for _ in 0..10 { |
| 476 | if let Ok(removed) = self.prune_older_than(age) { |
| 477 | removed_total = removed_total.saturating_add(removed); |
| 478 | } |
| 479 | if let Ok(new_size) = dir_size_bytes(&self.git_dir) |
| 480 | && new_size <= target_bytes |
| 481 | { |
| 482 | tracing::info!( |
| 483 | target: "snapshot", |
| 484 | new_size_mb = new_size / BYTES_PER_MB, |
| 485 | "pruned snapshot storage back under limit" |
| 486 | ); |
| 487 | break; |
| 488 | } |
| 489 | age = age.saturating_sub(Duration::from_millis(100)); |
| 490 | } |
| 491 | // Fallback: if even 0-second pruning didn't help (shouldn't |
| 492 | // happen but belt-and-suspenders), nuke the refs so the next |
| 493 | // snapshot starts a fresh history. |
| 494 | if let Ok(final_size) = dir_size_bytes(&self.git_dir) |
| 495 | && final_size > max_bytes |
| 496 | { |
| 497 | tracing::warn!( |
| 498 | target: "snapshot", |
| 499 | "snapshot storage still over limit after pruning; wiping history" |
| 500 | ); |
| 501 | if let Ok(removed) = self.prune_older_than(Duration::ZERO) { |
| 502 | removed_total = removed_total.saturating_add(removed); |
| 503 | } |
| 504 | let _ = self.prune_unreachable_objects(); |
| 505 | } |
| 506 | Ok(removed_total) |
| 507 | } |
| 508 | |
| 509 | /// Restore the workspace to the state at `id`. |
| 510 | /// |
| 511 | /// Uses `git checkout <sha> -- :/` which checks out every path in the |
| 512 | /// snapshot tree relative to the workspace root. We do NOT touch the |
| 513 | /// user's own `.git` — snapshots only contain working-tree files. |
| 514 | pub fn restore(&self, id: &SnapshotId) -> io::Result<()> { |
| 515 | // Restore is the one destructive operation with no undo of its own. |
| 516 | // Capture the pre-restore state first so the restore itself can be |
| 517 | // reversed (2026-08-04 snapshot hunt: makes several other findings |
| 518 | // recoverable instead of final). The `pre-restore:` prefix is |
| 519 | // deliberately not a `/undo` or `revert_turn` candidate label, so the |
| 520 | // safety net never changes snapshot selection. Best-effort: a failed |
| 521 | // safety snapshot must never block the restore the user asked for. |
| 522 | let target_short = &id.as_str()[..id.as_str().len().min(12)]; |
| 523 | if let Err(e) = self.snapshot_with_session(&format!("pre-restore:{target_short}"), None) { |
| 524 | tracing::warn!( |
| 525 | target: "snapshot", |
| 526 | "pre-restore safety snapshot failed (restore will proceed): {e}" |
| 527 | ); |
| 528 | } |
| 529 | let current_paths = self.tree_paths("HEAD")?; |
| 530 | let target_paths = self.tree_paths(id.as_str())?; |
| 531 | let checkout = run_git( |
| 532 | &self.git_dir, |
| 533 | &self.work_tree, |
| 534 | &["checkout", id.as_str(), "--", ":/"], |
| 535 | )?; |
| 536 | if !checkout.status.success() { |
| 537 | return Err(io_other(format!( |
| 538 | "git checkout failed: {}", |
| 539 | String::from_utf8_lossy(&checkout.stderr).trim() |
| 540 | ))); |
| 541 | } |
| 542 | self.remove_paths_missing_from_target(¤t_paths, &target_paths)?; |
| 543 | Ok(()) |
| 544 | } |
| 545 | |
| 546 | /// Return whether the current workspace matches the given snapshot's |
| 547 | /// tracked file content. |
| 548 | /// |
| 549 | /// This is intentionally narrower than a full "workspace identical" |
| 550 | /// claim: it compares the current working tree against the snapshot's |
| 551 | /// tracked paths via git's diff machinery. That is sufficient for |
| 552 | /// `/undo` cursoring — if the diff is empty, restoring this snapshot |
| 553 | /// again would be a no-op, so the caller should continue scanning |
| 554 | /// older snapshots. |
| 555 | pub fn work_tree_matches_snapshot(&self, id: &SnapshotId) -> io::Result<bool> { |
| 556 | let diff = run_git( |
| 557 | &self.git_dir, |
| 558 | &self.work_tree, |
| 559 | &["diff", "--quiet", id.as_str(), "--", ":/"], |
| 560 | )?; |
| 561 | Ok(diff.status.success()) |
| 562 | } |
| 563 | |
| 564 | fn tree_paths(&self, treeish: &str) -> io::Result<HashSet<PathBuf>> { |
| 565 | let ls = run_git( |
| 566 | &self.git_dir, |
| 567 | &self.work_tree, |
| 568 | &["ls-tree", "-r", "-z", "--name-only", treeish], |
| 569 | )?; |
| 570 | if !ls.status.success() { |
| 571 | return Err(io_other(format!( |
| 572 | "git ls-tree failed: {}", |
| 573 | String::from_utf8_lossy(&ls.stderr).trim() |
| 574 | ))); |
| 575 | } |
| 576 | Ok(parse_nul_paths(&ls.stdout)) |
| 577 | } |
| 578 | |
| 579 | fn remove_paths_missing_from_target( |
| 580 | &self, |
| 581 | current_paths: &HashSet<PathBuf>, |
| 582 | target_paths: &HashSet<PathBuf>, |
| 583 | ) -> io::Result<()> { |
| 584 | for rel in current_paths.difference(target_paths) { |
| 585 | if !is_safe_relative_path(rel) { |
| 586 | continue; |
| 587 | } |
| 588 | let path = self.work_tree.join(rel); |
| 589 | let Ok(metadata) = std::fs::symlink_metadata(&path) else { |
| 590 | continue; |
| 591 | }; |
| 592 | if metadata.file_type().is_dir() { |
| 593 | let _ = std::fs::remove_dir(&path); |
| 594 | } else { |
| 595 | std::fs::remove_file(&path)?; |
| 596 | } |
| 597 | self.prune_empty_parent_dirs(path.parent()); |
| 598 | } |
| 599 | Ok(()) |
| 600 | } |
| 601 | |
| 602 | fn prune_empty_parent_dirs(&self, mut dir: Option<&Path>) { |
| 603 | while let Some(path) = dir { |
| 604 | if path == self.work_tree { |
| 605 | break; |
| 606 | } |
| 607 | if std::fs::remove_dir(path).is_err() { |
| 608 | break; |
| 609 | } |
| 610 | dir = path.parent(); |
| 611 | } |
| 612 | } |
| 613 | |
| 614 | /// List up to `limit` most-recent snapshots, newest first. |
| 615 | pub fn list(&self, limit: usize) -> io::Result<Vec<Snapshot>> { |
| 616 | // `git log -<n>` is the short form of `--max-count=<n>`; if `limit` |
| 617 | // is `usize::MAX` (caller asked for "everything") we pass an empty |
| 618 | // count so git defaults to no upper bound. |
| 619 | let mut args: Vec<String> = vec!["log".to_string()]; |
| 620 | if limit < usize::MAX { |
| 621 | args.push(format!("--max-count={limit}")); |
| 622 | } |
| 623 | args.push("--pretty=format:%H%x09%at%x09%s".to_string()); |
| 624 | args.push("--no-color".to_string()); |
| 625 | let arg_refs: Vec<&str> = args.iter().map(String::as_str).collect(); |
| 626 | let log = run_git(&self.git_dir, &self.work_tree, &arg_refs)?; |
| 627 | if !log.status.success() { |
| 628 | // No commits yet → empty list. |
| 629 | return Ok(Vec::new()); |
| 630 | } |
| 631 | let stdout = String::from_utf8_lossy(&log.stdout); |
| 632 | let mut out = Vec::new(); |
| 633 | for line in stdout.lines() { |
| 634 | let mut parts = line.splitn(3, '\t'); |
| 635 | let sha = parts.next().unwrap_or("").to_string(); |
| 636 | let ts = parts |
| 637 | .next() |
| 638 | .and_then(|s| s.parse::<i64>().ok()) |
| 639 | .unwrap_or(0); |
| 640 | let subject = parts.next().unwrap_or("").to_string(); |
| 641 | if sha.is_empty() { |
| 642 | continue; |
| 643 | } |
| 644 | let (session_id, label) = Self::decode_session_label(&subject); |
| 645 | out.push(Snapshot { |
| 646 | id: SnapshotId(sha), |
| 647 | label, |
| 648 | timestamp: ts, |
| 649 | session_id, |
| 650 | }); |
| 651 | } |
| 652 | Ok(out) |
| 653 | } |
| 654 | |
| 655 | /// Drop snapshots older than `max_age`, returning the count removed. |
| 656 | /// |
| 657 | /// Strategy: identify keepable commits (younger than the cutoff), |
| 658 | /// reset HEAD to the oldest survivor, then `git reflog expire` + |
| 659 | /// `git gc --prune=now` to actually reclaim space. Cheap and avoids |
| 660 | /// rewriting history when nothing has aged out. |
| 661 | pub fn prune_older_than(&self, max_age: Duration) -> io::Result<usize> { |
| 662 | let now = SystemTime::now() |
| 663 | .duration_since(UNIX_EPOCH) |
| 664 | .map_err(|e| io_other(format!("clock error: {e}")))? |
| 665 | .as_secs() as i64; |
| 666 | let cutoff = now - max_age.as_secs() as i64; |
| 667 | |
| 668 | let snapshots = self.list(usize::MAX)?; |
| 669 | if snapshots.is_empty() { |
| 670 | return Ok(0); |
| 671 | } |
| 672 | |
| 673 | // Snapshots are newest-first. Find the index of the first one |
| 674 | // at-or-older than the cutoff — every entry from that index |
| 675 | // onward is a candidate for removal. We use `<=` so a 0-second |
| 676 | // retention drops same-second commits (otherwise tests calling |
| 677 | // `prune_older_than(Duration::ZERO)` immediately after creating |
| 678 | // a snapshot would never prune anything). |
| 679 | let cut_index = snapshots.iter().position(|s| s.timestamp <= cutoff); |
| 680 | let Some(cut) = cut_index else { |
| 681 | return Ok(0); |
| 682 | }; |
| 683 | let removed = snapshots.len() - cut; |
| 684 | if removed == 0 { |
| 685 | return Ok(0); |
| 686 | } |
| 687 | |
| 688 | if cut == 0 { |
| 689 | // Every snapshot is older than the cutoff — wipe the repo |
| 690 | // entirely so the next snapshot starts a fresh history. |
| 691 | // Removing `.git/refs/heads/*` is enough to orphan the old |
| 692 | // commits, then gc reclaims them. |
| 693 | let refs_dir = self.git_dir.join("refs").join("heads"); |
| 694 | if refs_dir.exists() { |
| 695 | for entry in std::fs::read_dir(&refs_dir)? { |
| 696 | let path = entry?.path(); |
| 697 | if path.is_file() { |
| 698 | let _ = std::fs::remove_file(&path); |
| 699 | } |
| 700 | } |
| 701 | } |
| 702 | // Also drop HEAD's packed refs so `git log` returns nothing. |
| 703 | let packed = self.git_dir.join("packed-refs"); |
| 704 | if packed.exists() { |
| 705 | let _ = std::fs::remove_file(&packed); |
| 706 | } |
| 707 | } else { |
| 708 | // Keep the newest `cut` snapshots (indices [0..cut], newest-first) |
| 709 | // and drop the older tail. This MUST rebuild the survivors as a |
| 710 | // fresh orphan chain, not `update-ref HEAD <oldest survivor>`: |
| 711 | // the snapshots are a parent-linked commit chain with the newest |
| 712 | // at HEAD, so pointing HEAD at the oldest survivor orphaned every |
| 713 | // NEWER snapshot (gc then destroyed them) while keeping the very |
| 714 | // snapshots we meant to remove as its ancestors — the exact |
| 715 | // inverse of the intent (2026-08-04 review, reproduced). |
| 716 | self.rebuild_survivor_chain(&snapshots[..cut])?; |
| 717 | } |
| 718 | |
| 719 | // Reclaim space. |
| 720 | let _ = run_git( |
| 721 | &self.git_dir, |
| 722 | &self.work_tree, |
| 723 | &["reflog", "expire", "--expire=now", "--all"], |
| 724 | ); |
| 725 | let _ = run_git( |
| 726 | &self.git_dir, |
| 727 | &self.work_tree, |
| 728 | &["gc", "--prune=now", "--quiet"], |
| 729 | ); |
| 730 | |
| 731 | Ok(removed) |
| 732 | } |
| 733 | |
| 734 | /// Rebuild `survivors` (newest-first) as a fresh orphan commit chain and |
| 735 | /// point HEAD at its tip, so every snapshot NOT in `survivors` becomes |
| 736 | /// unreachable for gc to reclaim. Each survivor's tree, label, session |
| 737 | /// id, and author/committer timestamp are preserved, so ages do not lie |
| 738 | /// after a prune (finding: `prune_keep_last_n` previously reset them to |
| 739 | /// "now"). Assumes `survivors` is non-empty. |
| 740 | fn rebuild_survivor_chain(&self, survivors: &[Snapshot]) -> io::Result<()> { |
| 741 | let mut prev_sha: Option<String> = None; |
| 742 | for s in survivors.iter().rev() { |
| 743 | let tree = run_git( |
| 744 | &self.git_dir, |
| 745 | &self.work_tree, |
| 746 | &["rev-parse", &format!("{}^{{tree}}", s.id.as_str())], |
| 747 | )?; |
| 748 | if !tree.status.success() { |
| 749 | return Err(io_other(format!( |
| 750 | "rev-parse {}^{{tree}} failed: {}", |
| 751 | s.id.as_str(), |
| 752 | String::from_utf8_lossy(&tree.stderr).trim() |
| 753 | ))); |
| 754 | } |
| 755 | let tree_hash = String::from_utf8_lossy(&tree.stdout).trim().to_string(); |
| 756 | |
| 757 | let mut args = vec![ |
| 758 | "commit-tree".to_string(), |
| 759 | "-m".to_string(), |
| 760 | Self::encode_session_label(&s.label, s.session_id.as_deref()), |
| 761 | tree_hash, |
| 762 | ]; |
| 763 | if let Some(ref p) = prev_sha { |
| 764 | args.push("-p".to_string()); |
| 765 | args.push(p.clone()); |
| 766 | } |
| 767 | let arg_refs: Vec<&str> = args.iter().map(String::as_str).collect(); |
| 768 | let new_sha = self.commit_tree_preserving_date(&arg_refs, s.timestamp)?; |
| 769 | prev_sha = Some(new_sha); |
| 770 | } |
| 771 | |
| 772 | if let Some(final_sha) = prev_sha { |
| 773 | let up = run_git( |
| 774 | &self.git_dir, |
| 775 | &self.work_tree, |
| 776 | &["update-ref", "HEAD", &final_sha], |
| 777 | )?; |
| 778 | if !up.status.success() { |
| 779 | return Err(io_other(format!( |
| 780 | "update-ref HEAD failed: {}", |
| 781 | String::from_utf8_lossy(&up.stderr).trim() |
| 782 | ))); |
| 783 | } |
| 784 | } |
| 785 | Ok(()) |
| 786 | } |
| 787 | |
| 788 | /// Run a `commit-tree` invocation with the author/committer dates pinned |
| 789 | /// to `timestamp` (Unix seconds), so a rebuilt survivor keeps its real |
| 790 | /// age instead of stamping "now". |
| 791 | fn commit_tree_preserving_date(&self, args: &[&str], timestamp: i64) -> io::Result<String> { |
| 792 | let date = format!("{timestamp} +0000"); |
| 793 | let out = crate::dependencies::Git::command() |
| 794 | .ok_or_else(|| io::Error::new(io::ErrorKind::NotFound, "git not found on PATH"))? |
| 795 | .arg("--git-dir") |
| 796 | .arg(&self.git_dir) |
| 797 | .arg("--work-tree") |
| 798 | .arg(&self.work_tree) |
| 799 | .env("GIT_AUTHOR_DATE", &date) |
| 800 | .env("GIT_COMMITTER_DATE", &date) |
| 801 | .args(args) |
| 802 | .output()?; |
| 803 | if !out.status.success() { |
| 804 | return Err(io_other(format!( |
| 805 | "commit-tree failed: {}", |
| 806 | String::from_utf8_lossy(&out.stderr).trim() |
| 807 | ))); |
| 808 | } |
| 809 | Ok(String::from_utf8_lossy(&out.stdout).trim().to_string()) |
| 810 | } |
| 811 | |
| 812 | /// Keep only the latest `max_count` snapshots, dropping older ones. |
| 813 | /// |
| 814 | /// Uses `commit-tree` with no `-p` to create a true orphan commit at |
| 815 | /// the eldest survivor's tree, preserving its label. The old chain |
| 816 | /// has zero refs after gc and is physically reclaimed. |
| 817 | /// Keep only the latest `max_count` snapshots by rebuilding the |
| 818 | /// survivor chain as orphan commits. Each survivor's tree and label |
| 819 | /// are preserved — only the parent chain to older snapshots is cut. |
| 820 | /// Old objects become unreachable and gc reclaims them. |
| 821 | pub fn prune_keep_last_n(&self, max_count: usize) -> io::Result<usize> { |
| 822 | let snapshots = self.list(usize::MAX)?; |
| 823 | if snapshots.len() <= max_count { |
| 824 | return Ok(0); |
| 825 | } |
| 826 | let keep = max_count; |
| 827 | let removed = snapshots.len() - keep; |
| 828 | // snapshots are newest-first: [0..keep] are the survivors. Rebuild |
| 829 | // them as an orphan chain so the older tail is reclaimed. |
| 830 | self.rebuild_survivor_chain(&snapshots[..keep])?; |
| 831 | let _ = run_git( |
| 832 | &self.git_dir, |
| 833 | &self.work_tree, |
| 834 | &["reflog", "expire", "--expire=now", "--all"], |
| 835 | ); |
| 836 | let _ = run_git( |
| 837 | &self.git_dir, |
| 838 | &self.work_tree, |
| 839 | &["gc", "--prune=now", "--quiet"], |
| 840 | ); |
| 841 | Ok(removed) |
| 842 | } |
| 843 | |
| 844 | /// Drop unreachable loose objects left behind by interrupted or |
| 845 | /// orphaned side-repo operations. |
| 846 | pub fn prune_unreachable_objects(&self) -> io::Result<()> { |
| 847 | let prune = run_git(&self.git_dir, &self.work_tree, &["prune", "--expire=now"])?; |
| 848 | if !prune.status.success() { |
| 849 | return Err(io_other(format!( |
| 850 | "git prune failed: {}", |
| 851 | String::from_utf8_lossy(&prune.stderr).trim() |
| 852 | ))); |
| 853 | } |
| 854 | Ok(()) |
| 855 | } |
| 856 | |
| 857 | /// Return the side-repo's `.git` directory (for diagnostics). |
| 858 | #[allow(dead_code)] |
| 859 | pub fn git_dir(&self) -> &Path { |
| 860 | &self.git_dir |
| 861 | } |
| 862 | |
| 863 | /// Return the work tree path (for diagnostics). |
| 864 | #[allow(dead_code)] |
| 865 | pub fn work_tree(&self) -> &Path { |
| 866 | &self.work_tree |
| 867 | } |
| 868 | } |
| 869 | |
| 870 | fn write_builtin_excludes(git_dir: &Path) -> io::Result<()> { |
| 871 | let info_dir = git_dir.join("info"); |
| 872 | std::fs::create_dir_all(&info_dir)?; |
| 873 | std::fs::write(info_dir.join("exclude"), BUILTIN_EXCLUDES) |
| 874 | } |
| 875 | |
| 876 | /// Recursively compute the total size of a directory in bytes. |
| 877 | fn dir_size_bytes(root: &Path) -> io::Result<u64> { |
| 878 | fn walk(dir: &Path, total: &mut u64) -> io::Result<()> { |
| 879 | if !dir.is_dir() { |
| 880 | return Ok(()); |
| 881 | } |
| 882 | for entry in std::fs::read_dir(dir)? { |
| 883 | let entry = entry?; |
| 884 | let path = entry.path(); |
| 885 | let ft = entry.file_type()?; |
| 886 | if ft.is_symlink() { |
| 887 | continue; |
| 888 | } |
| 889 | if ft.is_dir() { |
| 890 | walk(&path, total)?; |
| 891 | } else if ft.is_file() { |
| 892 | *total = total.saturating_add(entry.metadata().map(|m| m.len()).unwrap_or(0)); |
| 893 | } |
| 894 | } |
| 895 | Ok(()) |
| 896 | } |
| 897 | let mut total: u64 = 0; |
| 898 | walk(root, &mut total)?; |
| 899 | Ok(total) |
| 900 | } |
| 901 | |
| 902 | /// One prominent notice per workspace per process when the size-pressure |
| 903 | /// prune destroys restore points — silent loss of undo history is the S5 |
| 904 | /// failure mode (2026-08-04 snapshot hunt). The stderr print is deliberate: |
| 905 | /// headless/CLI stderr is the user surface for once-per-workspace snapshot |
| 906 | /// warnings, matching `maybe_notify_snapshots_disabled_once` in |
| 907 | /// `core/turn.rs`. |
| 908 | #[allow(clippy::print_stderr)] |
| 909 | fn notify_snapshot_history_pruned_once(workspace: &Path, removed: usize) { |
| 910 | use std::collections::HashSet; |
| 911 | use std::sync::{Mutex, OnceLock}; |
| 912 | static NOTIFIED: OnceLock<Mutex<HashSet<String>>> = OnceLock::new(); |
| 913 | let key = workspace.to_string_lossy().into_owned(); |
| 914 | let set = NOTIFIED.get_or_init(|| Mutex::new(HashSet::new())); |
| 915 | let Ok(mut guard) = set.lock() else { |
| 916 | return; |
| 917 | }; |
| 918 | if !guard.insert(key) { |
| 919 | return; |
| 920 | } |
| 921 | drop(guard); |
| 922 | eprint!("{}", snapshot_history_pruned_message(workspace, removed)); |
| 923 | } |
| 924 | |
| 925 | /// Build the user-visible notice for a size-pressure prune. Kept pure and |
| 926 | /// separate from the emit/dedup shell so the content is unit-testable. |
| 927 | fn snapshot_history_pruned_message(workspace: &Path, removed: usize) -> String { |
| 928 | format!( |
| 929 | "warning: snapshot/undo history for {} was pruned to stay under the {} MB snapshot storage cap. |
| 930 | {} snapshot(s) were removed and can no longer be restored. |
| 931 | The cap bounds the undo side-repo's disk use; high-churn or large workspaces hit it sooner. |
| 932 | ", |
| 933 | workspace.display(), |
| 934 | MAX_SNAPSHOT_SIZE_MB, |
| 935 | removed |
| 936 | ) |
| 937 | } |
| 938 | |
| 939 | fn cleanup_stale_pack_temps(git_dir: &Path, stale_age: Duration) -> io::Result<usize> { |
| 940 | let pack_dir = git_dir.join("objects").join("pack"); |
| 941 | if !pack_dir.exists() { |
| 942 | return Ok(0); |
| 943 | } |
| 944 | cleanup_stale_pack_temps_in(&pack_dir, stale_age, SystemTime::now()) |
| 945 | } |
| 946 | |
| 947 | fn cleanup_stale_pack_temps_in( |
| 948 | pack_dir: &Path, |
| 949 | stale_age: Duration, |
| 950 | now: SystemTime, |
| 951 | ) -> io::Result<usize> { |
| 952 | let mut removed = 0; |
| 953 | for entry in std::fs::read_dir(pack_dir)? { |
| 954 | let entry = entry?; |
| 955 | let name = entry.file_name(); |
| 956 | let Some(name) = name.to_str() else { |
| 957 | continue; |
| 958 | }; |
| 959 | if !name.starts_with("tmp_pack_") { |
| 960 | continue; |
| 961 | } |
| 962 | if !entry.file_type()?.is_file() { |
| 963 | continue; |
| 964 | } |
| 965 | |
| 966 | let metadata = entry.metadata()?; |
| 967 | let Ok(modified) = metadata.modified() else { |
| 968 | continue; |
| 969 | }; |
| 970 | let Ok(age) = now.duration_since(modified) else { |
| 971 | continue; |
| 972 | }; |
| 973 | if age < stale_age { |
| 974 | continue; |
| 975 | } |
| 976 | |
| 977 | match std::fs::remove_file(entry.path()) { |
| 978 | Ok(()) => removed += 1, |
| 979 | Err(err) if err.kind() == io::ErrorKind::NotFound => {} |
| 980 | Err(err) => return Err(err), |
| 981 | } |
| 982 | } |
| 983 | Ok(removed) |
| 984 | } |
| 985 | |
| 986 | fn run_git(git_dir: &Path, work_tree: &Path, args: &[&str]) -> io::Result<Output> { |
| 987 | crate::dependencies::Git::command() |
| 988 | .ok_or_else(|| io::Error::new(io::ErrorKind::NotFound, "git not found on PATH"))? |
| 989 | .arg("--git-dir") |
| 990 | .arg(git_dir) |
| 991 | .arg("--work-tree") |
| 992 | .arg(work_tree) |
| 993 | .args(args) |
| 994 | .output() |
| 995 | } |
| 996 | |
| 997 | fn io_other(msg: impl Into<String>) -> io::Error { |
| 998 | io::Error::other(msg.into()) |
| 999 | } |
| 1000 | |
| 1001 | /// Walk `workspace` and accumulate file sizes, returning `Some(total)` |
| 1002 | /// when the workspace fits under `cap_bytes` and `None` when the walk |
| 1003 | /// exceeds the cap. Honors `.gitignore` (via the `ignore` crate's |
| 1004 | /// `WalkBuilder` defaults) and the snapshot-specific skip list above, |
| 1005 | /// so the measured size reflects what would actually land in a |
| 1006 | /// snapshot commit rather than the raw `du -sh` total. |
| 1007 | /// |
| 1008 | /// The walk is bounded by both `cap_bytes` and |
| 1009 | /// [`SIZE_WALK_MAX_ENTRIES`] — either trip returns `None`. A |
| 1010 | /// `cap_bytes` of `0` disables the cap entirely (returns `Some(total)` |
| 1011 | /// no matter how large), so config can opt out. |
| 1012 | pub fn estimate_workspace_size_bounded(workspace: &Path, cap_bytes: u64) -> Option<u64> { |
| 1013 | use ignore::WalkBuilder; |
| 1014 | let mut total: u64 = 0; |
| 1015 | let mut entries: usize = 0; |
| 1016 | let skip: HashSet<&'static str> = SIZE_WALK_SKIP_DIRS.iter().copied().collect(); |
| 1017 | let walker = WalkBuilder::new(workspace) |
| 1018 | .hidden(false) |
| 1019 | .follow_links(false) |
| 1020 | .filter_entry(move |entry| { |
| 1021 | // Skip the well-known build-output directories at any depth. |
| 1022 | // The `ignore` crate calls `filter_entry` once per dir/file; |
| 1023 | // returning `false` here prunes the whole subtree. |
| 1024 | entry |
| 1025 | .file_name() |
| 1026 | .to_str() |
| 1027 | .is_none_or(|name| !skip.contains(name)) |
| 1028 | }) |
| 1029 | .build(); |
| 1030 | for entry in walker.flatten() { |
| 1031 | entries += 1; |
| 1032 | if entries > SIZE_WALK_MAX_ENTRIES { |
| 1033 | return None; |
| 1034 | } |
| 1035 | if let Ok(meta) = entry.metadata() |
| 1036 | && meta.is_file() |
| 1037 | { |
| 1038 | total = total.saturating_add(meta.len()); |
| 1039 | if cap_bytes > 0 && total > cap_bytes { |
| 1040 | return None; |
| 1041 | } |
| 1042 | } |
| 1043 | } |
| 1044 | Some(total) |
| 1045 | } |
| 1046 | |
| 1047 | fn unsafe_workspace_snapshot_reason(workspace: &Path, home: Option<&Path>) -> Option<&'static str> { |
| 1048 | let workspace = normalize_path_for_safety(workspace); |
| 1049 | if is_filesystem_root(&workspace) { |
| 1050 | return Some("filesystem root"); |
| 1051 | } |
| 1052 | |
| 1053 | if is_home_directory(&workspace, home) { |
| 1054 | return Some("home directory"); |
| 1055 | } |
| 1056 | |
| 1057 | let home = home.map(normalize_path_for_safety)?; |
| 1058 | if workspace.parent() == Some(home.as_path()) { |
| 1059 | let name = workspace.file_name().and_then(|name| name.to_str()); |
| 1060 | if matches!( |
| 1061 | name, |
| 1062 | Some( |
| 1063 | "Desktop" | "Documents" | "Downloads" | "Library" | "Movies" | "Music" | "Pictures" |
| 1064 | ) |
| 1065 | ) { |
| 1066 | return Some("home collection directory"); |
| 1067 | } |
| 1068 | } |
| 1069 | |
| 1070 | None |
| 1071 | } |
| 1072 | |
| 1073 | fn normalize_path_for_safety(path: &Path) -> PathBuf { |
| 1074 | path.canonicalize().unwrap_or_else(|_| path.to_path_buf()) |
| 1075 | } |
| 1076 | |
| 1077 | fn is_filesystem_root(path: &Path) -> bool { |
| 1078 | path.parent().is_none() |
| 1079 | } |
| 1080 | |
| 1081 | fn is_home_directory(work_tree: &Path, home: Option<&Path>) -> bool { |
| 1082 | let Some(home) = home else { |
| 1083 | return false; |
| 1084 | }; |
| 1085 | |
| 1086 | let home_canonical = home.canonicalize().unwrap_or_else(|_| home.to_path_buf()); |
| 1087 | work_tree == home_canonical |
| 1088 | } |
| 1089 | |
| 1090 | fn parse_nul_paths(bytes: &[u8]) -> HashSet<PathBuf> { |
| 1091 | bytes |
| 1092 | .split(|b| *b == 0) |
| 1093 | .filter(|chunk| !chunk.is_empty()) |
| 1094 | .map(|chunk| PathBuf::from(String::from_utf8_lossy(chunk).into_owned())) |
| 1095 | .collect() |
| 1096 | } |
| 1097 | |
| 1098 | fn is_safe_relative_path(path: &Path) -> bool { |
| 1099 | !path.as_os_str().is_empty() |
| 1100 | && path |
| 1101 | .components() |
| 1102 | .all(|component| matches!(component, Component::Normal(_))) |
| 1103 | } |
| 1104 | |
| 1105 | #[cfg(test)] |
| 1106 | mod tests { |
| 1107 | use super::*; |
| 1108 | use crate::test_support::lock_test_env; |
| 1109 | use std::fs::{File, FileTimes}; |
| 1110 | use tempfile::tempdir; |
| 1111 | |
| 1112 | /// Holds the home directory pinned to a tempdir for the lifetime of a test. Also |
| 1113 | /// owns the process-wide env-var mutex so tests across modules |
| 1114 | /// don't trample each other's home env vars. |
| 1115 | pub(super) struct ScopedHome { |
| 1116 | prev_vars: Vec<(&'static str, Option<std::ffi::OsString>)>, |
| 1117 | _guard: crate::test_support::TestEnvLock, |
| 1118 | } |
| 1119 | impl Drop for ScopedHome { |
| 1120 | fn drop(&mut self) { |
| 1121 | // SAFETY: process-wide lock still held. |
| 1122 | unsafe { |
| 1123 | for (key, prev) in self.prev_vars.drain(..) { |
| 1124 | match prev { |
| 1125 | Some(value) => std::env::set_var(key, value), |
| 1126 | None => std::env::remove_var(key), |
| 1127 | } |
| 1128 | } |
| 1129 | } |
| 1130 | } |
| 1131 | } |
| 1132 | pub(super) fn scoped_home(home: &Path) -> ScopedHome { |
| 1133 | let guard = lock_test_env(); |
| 1134 | let prev_vars = ["HOME", "USERPROFILE", "HOMEDRIVE", "HOMEPATH"] |
| 1135 | .into_iter() |
| 1136 | .map(|key| (key, std::env::var_os(key))) |
| 1137 | .collect(); |
| 1138 | // SAFETY: serialised by the global env lock. |
| 1139 | unsafe { |
| 1140 | std::env::set_var("HOME", home); |
| 1141 | std::env::set_var("USERPROFILE", home); |
| 1142 | std::env::remove_var("HOMEDRIVE"); |
| 1143 | std::env::remove_var("HOMEPATH"); |
| 1144 | } |
| 1145 | ScopedHome { |
| 1146 | prev_vars, |
| 1147 | _guard: guard, |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | /// Build a side-repo whose snapshot dir lives under the same |
| 1152 | /// tempdir we're using for `HOME` — so the inner `crate::config::effective_home_dir()` |
| 1153 | /// lookup stays inside our sandbox. Returns the guard alongside so |
| 1154 | /// the caller can keep HOME pinned for the rest of the test. |
| 1155 | fn make_repo(tmp: &Path) -> (SnapshotRepo, ScopedHome) { |
| 1156 | let workspace = tmp.join("workspace"); |
| 1157 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1158 | let guard = scoped_home(tmp); |
| 1159 | let repo = SnapshotRepo::open_or_init(&workspace).expect("open_or_init"); |
| 1160 | (repo, guard) |
| 1161 | } |
| 1162 | |
| 1163 | #[test] |
| 1164 | fn snapshot_creates_commit_in_side_repo_only() { |
| 1165 | let tmp = tempdir().unwrap(); |
| 1166 | let (repo, _home) = make_repo(tmp.path()); |
| 1167 | std::fs::write(repo.work_tree().join("a.txt"), b"alpha").unwrap(); |
| 1168 | |
| 1169 | let id = repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1170 | assert_eq!(id.as_str().len(), 40); |
| 1171 | |
| 1172 | let list = repo.list(10).expect("list"); |
| 1173 | assert_eq!(list.len(), 1); |
| 1174 | assert_eq!(list[0].label, "pre-turn:1"); |
| 1175 | |
| 1176 | // The user's workspace must NOT have a real `.git` because we |
| 1177 | // never created one in their workspace — only in the side dir. |
| 1178 | assert!(!repo.work_tree().join(".git").exists()); |
| 1179 | } |
| 1180 | |
| 1181 | #[test] |
| 1182 | fn open_existing_is_read_only_and_does_not_initialize() { |
| 1183 | let tmp = tempdir().unwrap(); |
| 1184 | let workspace = tmp.path().join("workspace"); |
| 1185 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1186 | let _home = scoped_home(tmp.path()); |
| 1187 | |
| 1188 | let before = SnapshotRepo::open_existing(&workspace).expect("open existing"); |
| 1189 | assert!(before.is_none()); |
| 1190 | assert!( |
| 1191 | !snapshot_git_dir(&workspace).exists(), |
| 1192 | "read-only open must not create the side repo" |
| 1193 | ); |
| 1194 | |
| 1195 | let repo = SnapshotRepo::open_or_init(&workspace).expect("open_or_init"); |
| 1196 | std::fs::write(repo.work_tree().join("a.txt"), b"alpha").unwrap(); |
| 1197 | repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1198 | |
| 1199 | let after = SnapshotRepo::open_existing(&workspace).expect("open existing"); |
| 1200 | assert!(after.is_some()); |
| 1201 | } |
| 1202 | |
| 1203 | #[test] |
| 1204 | fn restore_reverts_workspace_files() { |
| 1205 | let tmp = tempdir().unwrap(); |
| 1206 | let (repo, _home) = make_repo(tmp.path()); |
| 1207 | let f = repo.work_tree().join("file.txt"); |
| 1208 | |
| 1209 | std::fs::write(&f, b"original").unwrap(); |
| 1210 | let id = repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1211 | |
| 1212 | std::fs::write(&f, b"clobbered").unwrap(); |
| 1213 | repo.snapshot("post-turn:1").expect("snapshot 2"); |
| 1214 | |
| 1215 | repo.restore(&id).expect("restore"); |
| 1216 | let after = std::fs::read_to_string(&f).unwrap(); |
| 1217 | assert_eq!(after, "original"); |
| 1218 | } |
| 1219 | |
| 1220 | #[test] |
| 1221 | fn restore_removes_files_added_after_target_snapshot() { |
| 1222 | let tmp = tempdir().unwrap(); |
| 1223 | let (repo, _home) = make_repo(tmp.path()); |
| 1224 | let original = repo.work_tree().join("original.txt"); |
| 1225 | let added = repo.work_tree().join("added.txt"); |
| 1226 | |
| 1227 | std::fs::write(&original, b"original").unwrap(); |
| 1228 | let id = repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1229 | |
| 1230 | std::fs::write(&added, b"new file").unwrap(); |
| 1231 | repo.snapshot("post-turn:1").expect("snapshot 2"); |
| 1232 | |
| 1233 | repo.restore(&id).expect("restore"); |
| 1234 | assert!(original.exists()); |
| 1235 | assert!(!added.exists(), "restore must remove tracked added files"); |
| 1236 | } |
| 1237 | |
| 1238 | #[test] |
| 1239 | fn restore_takes_a_pre_restore_safety_snapshot_that_round_trips() { |
| 1240 | let tmp = tempdir().unwrap(); |
| 1241 | let (repo, _home) = make_repo(tmp.path()); |
| 1242 | let f = repo.work_tree().join("file.txt"); |
| 1243 | |
| 1244 | std::fs::write(&f, b"v1").unwrap(); |
| 1245 | let id1 = repo.snapshot("pre-turn:1").expect("snapshot v1"); |
| 1246 | |
| 1247 | std::fs::write(&f, b"v2").unwrap(); |
| 1248 | repo.snapshot("post-turn:1").expect("snapshot v2"); |
| 1249 | |
| 1250 | repo.restore(&id1).expect("restore to v1"); |
| 1251 | assert_eq!(std::fs::read_to_string(&f).unwrap(), "v1"); |
| 1252 | |
| 1253 | // The restore must have captured the pre-restore state (v2) under a |
| 1254 | // `pre-restore:` label naming its target, so the destructive op is |
| 1255 | // itself reversible (2026-08-04 snapshot hunt). |
| 1256 | let snapshots = repo.list(usize::MAX).expect("list"); |
| 1257 | let safety = snapshots |
| 1258 | .iter() |
| 1259 | .find(|s| s.label.starts_with("pre-restore:")) |
| 1260 | .expect("a pre-restore safety snapshot must exist"); |
| 1261 | assert!( |
| 1262 | safety.label.ends_with(&id1.as_str()[..12]), |
| 1263 | "safety label should name the restore target: {}", |
| 1264 | safety.label |
| 1265 | ); |
| 1266 | |
| 1267 | repo.restore(&safety.id) |
| 1268 | .expect("restore the safety snapshot"); |
| 1269 | assert_eq!( |
| 1270 | std::fs::read_to_string(&f).unwrap(), |
| 1271 | "v2", |
| 1272 | "the safety snapshot must bring back the pre-restore state" |
| 1273 | ); |
| 1274 | } |
| 1275 | |
| 1276 | #[test] |
| 1277 | fn snapshot_and_restore_do_not_move_user_git_head() { |
| 1278 | let tmp = tempdir().unwrap(); |
| 1279 | let workspace = tmp.path().join("workspace"); |
| 1280 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1281 | crate::dependencies::Git::command() |
| 1282 | .expect("git not found") |
| 1283 | .arg("-C") |
| 1284 | .arg(&workspace) |
| 1285 | .arg("init") |
| 1286 | .arg("--quiet") |
| 1287 | .status() |
| 1288 | .unwrap(); |
| 1289 | std::fs::write(workspace.join("tracked.txt"), b"committed").unwrap(); |
| 1290 | crate::dependencies::Git::command() |
| 1291 | .expect("git not found") |
| 1292 | .arg("-C") |
| 1293 | .arg(&workspace) |
| 1294 | .arg("add") |
| 1295 | .arg("tracked.txt") |
| 1296 | .status() |
| 1297 | .unwrap(); |
| 1298 | crate::dependencies::Git::command() |
| 1299 | .expect("git not found") |
| 1300 | .arg("-C") |
| 1301 | .arg(&workspace) |
| 1302 | .arg("-c") |
| 1303 | .arg("user.name=user") |
| 1304 | .arg("-c") |
| 1305 | .arg("user.email=user@example.test") |
| 1306 | .arg("commit") |
| 1307 | .arg("--quiet") |
| 1308 | .arg("-m") |
| 1309 | .arg("init") |
| 1310 | .status() |
| 1311 | .unwrap(); |
| 1312 | let user_head_before = crate::dependencies::Git::command() |
| 1313 | .expect("git not found") |
| 1314 | .arg("-C") |
| 1315 | .arg(&workspace) |
| 1316 | .args(["rev-parse", "HEAD"]) |
| 1317 | .output() |
| 1318 | .unwrap() |
| 1319 | .stdout; |
| 1320 | |
| 1321 | let _home = scoped_home(tmp.path()); |
| 1322 | let repo = SnapshotRepo::open_or_init(&workspace).unwrap(); |
| 1323 | std::fs::write(workspace.join("tracked.txt"), b"dirty-before").unwrap(); |
| 1324 | let id = repo.snapshot("pre-turn:1").unwrap(); |
| 1325 | std::fs::write(workspace.join("tracked.txt"), b"dirty-after").unwrap(); |
| 1326 | repo.snapshot("post-turn:1").unwrap(); |
| 1327 | repo.restore(&id).unwrap(); |
| 1328 | |
| 1329 | let user_head_after = crate::dependencies::Git::command() |
| 1330 | .expect("git not found") |
| 1331 | .arg("-C") |
| 1332 | .arg(&workspace) |
| 1333 | .args(["rev-parse", "HEAD"]) |
| 1334 | .output() |
| 1335 | .unwrap() |
| 1336 | .stdout; |
| 1337 | assert_eq!(user_head_after, user_head_before); |
| 1338 | assert_eq!( |
| 1339 | std::fs::read_to_string(workspace.join("tracked.txt")).unwrap(), |
| 1340 | "dirty-before" |
| 1341 | ); |
| 1342 | } |
| 1343 | |
| 1344 | #[test] |
| 1345 | fn list_respects_limit() { |
| 1346 | let tmp = tempdir().unwrap(); |
| 1347 | let (repo, _home) = make_repo(tmp.path()); |
| 1348 | for i in 0..5 { |
| 1349 | std::fs::write(repo.work_tree().join("f.txt"), format!("v{i}")).unwrap(); |
| 1350 | repo.snapshot(&format!("turn:{i}")).unwrap(); |
| 1351 | } |
| 1352 | let three = repo.list(3).unwrap(); |
| 1353 | assert_eq!(three.len(), 3); |
| 1354 | // Newest first. |
| 1355 | assert_eq!(three[0].label, "turn:4"); |
| 1356 | } |
| 1357 | |
| 1358 | #[test] |
| 1359 | fn prune_drops_snapshots_older_than_threshold() { |
| 1360 | let tmp = tempdir().unwrap(); |
| 1361 | let (repo, _home) = make_repo(tmp.path()); |
| 1362 | std::fs::write(repo.work_tree().join("f.txt"), "v0").unwrap(); |
| 1363 | repo.snapshot("turn:0").unwrap(); |
| 1364 | |
| 1365 | // Wait one second so the snapshot's commit timestamp is strictly |
| 1366 | // in the past relative to the prune call's "now" — otherwise |
| 1367 | // same-second comparisons make the assertion flaky. |
| 1368 | std::thread::sleep(Duration::from_millis(1100)); |
| 1369 | |
| 1370 | let removed = repo.prune_older_than(Duration::from_secs(0)).unwrap(); |
| 1371 | assert!(removed >= 1, "expected at least 1 pruned, got {removed}"); |
| 1372 | |
| 1373 | // After pruning everything, the next snapshot should start a |
| 1374 | // fresh history. |
| 1375 | std::fs::write(repo.work_tree().join("f.txt"), "v1").unwrap(); |
| 1376 | repo.snapshot("turn:1").unwrap(); |
| 1377 | let list = repo.list(10).unwrap(); |
| 1378 | assert_eq!(list.len(), 1); |
| 1379 | assert_eq!(list[0].label, "turn:1"); |
| 1380 | } |
| 1381 | |
| 1382 | /// The 2026-08-04 regression: with a cut in the MIDDLE of history, |
| 1383 | /// `prune_older_than` used to `update-ref HEAD <oldest survivor>`, which |
| 1384 | /// orphaned (and gc destroyed) the NEWEST snapshots while keeping the |
| 1385 | /// old ones as ancestors — the inverse of the intent, firing on every |
| 1386 | /// boot. This pins the correct partial-cut behavior. |
| 1387 | #[test] |
| 1388 | fn prune_older_than_keeps_the_newest_and_drops_only_the_old_tail() { |
| 1389 | let tmp = tempdir().unwrap(); |
| 1390 | let (repo, _home) = make_repo(tmp.path()); |
| 1391 | |
| 1392 | // Two "old" snapshots, then a pause, then two "new" ones. |
| 1393 | for i in 0..2 { |
| 1394 | std::fs::write(repo.work_tree().join("f.txt"), format!("old{i}")).unwrap(); |
| 1395 | repo.snapshot(&format!("old:{i}")).unwrap(); |
| 1396 | std::thread::sleep(Duration::from_millis(1100)); |
| 1397 | } |
| 1398 | // A wide gap so git's whole-second commit timestamps land the cut |
| 1399 | // unambiguously between the old and new pairs. The margins are |
| 1400 | // deliberately generous: this test runs under full-suite parallelism |
| 1401 | // where a sleep can overrun, and the cut is wall-clock. At prune time |
| 1402 | // the newest pair is ~0-1.2s old against a 6s cutoff, and the old |
| 1403 | // pair is ~9s old — ~5s of slack in both directions. |
| 1404 | std::thread::sleep(Duration::from_secs(8)); |
| 1405 | for i in 0..2 { |
| 1406 | std::fs::write(repo.work_tree().join("f.txt"), format!("new{i}")).unwrap(); |
| 1407 | repo.snapshot(&format!("new:{i}")).unwrap(); |
| 1408 | if i == 0 { |
| 1409 | std::thread::sleep(Duration::from_millis(1100)); |
| 1410 | } |
| 1411 | } |
| 1412 | let before = repo.list(usize::MAX).unwrap(); |
| 1413 | assert_eq!(before.len(), 4); |
| 1414 | // Guard the fixture itself: if load skewed the timestamps so the cut |
| 1415 | // would not fall between the pairs, say so instead of failing later |
| 1416 | // with a confusing count mismatch. |
| 1417 | let now = std::time::SystemTime::now() |
| 1418 | .duration_since(std::time::UNIX_EPOCH) |
| 1419 | .unwrap() |
| 1420 | .as_secs() as i64; |
| 1421 | assert!( |
| 1422 | now - before[0].timestamp < 6 && now - before[2].timestamp > 6, |
| 1423 | "fixture ages unusable for a 6s cut (newest {}s, oldest-surviving-pair {}s)", |
| 1424 | now - before[0].timestamp, |
| 1425 | now - before[2].timestamp |
| 1426 | ); |
| 1427 | |
| 1428 | // Cut 6s back: the two old snapshots drop, the two new ones survive. |
| 1429 | let removed = repo.prune_older_than(Duration::from_secs(6)).unwrap(); |
| 1430 | assert_eq!(removed, 2, "only the old tail should be removed"); |
| 1431 | |
| 1432 | let remaining = repo.list(usize::MAX).unwrap(); |
| 1433 | assert_eq!(remaining.len(), 2, "the two newest must survive"); |
| 1434 | assert_eq!( |
| 1435 | remaining[0].label, "new:1", |
| 1436 | "newest survives (was destroyed before)" |
| 1437 | ); |
| 1438 | assert_eq!(remaining[1].label, "new:0"); |
| 1439 | assert!( |
| 1440 | !remaining.iter().any(|s| s.label.starts_with("old:")), |
| 1441 | "old snapshots must be gone, not kept as ancestors: {:?}", |
| 1442 | remaining.iter().map(|s| &s.label).collect::<Vec<_>>() |
| 1443 | ); |
| 1444 | |
| 1445 | // The survivors' contents are intact and restorable. |
| 1446 | repo.restore(&remaining[0].id).unwrap(); |
| 1447 | assert_eq!( |
| 1448 | std::fs::read_to_string(repo.work_tree().join("f.txt")).unwrap(), |
| 1449 | "new1" |
| 1450 | ); |
| 1451 | } |
| 1452 | |
| 1453 | #[test] |
| 1454 | fn prune_keep_last_n_keeps_latest_and_gc_reclaims_rest() { |
| 1455 | let tmp = tempdir().unwrap(); |
| 1456 | let (repo, _home) = make_repo(tmp.path()); |
| 1457 | |
| 1458 | for i in 0..3 { |
| 1459 | std::fs::write(repo.work_tree().join("f.txt"), format!("v{i}")).unwrap(); |
| 1460 | repo.snapshot(&format!("turn:{i}")).unwrap(); |
| 1461 | std::thread::sleep(Duration::from_millis(1100)); |
| 1462 | } |
| 1463 | |
| 1464 | assert_eq!(repo.list(usize::MAX).unwrap().len(), 3); |
| 1465 | |
| 1466 | let removed = repo.prune_keep_last_n(1).unwrap(); |
| 1467 | assert_eq!(removed, 2); |
| 1468 | |
| 1469 | let remaining = repo.list(usize::MAX).unwrap(); |
| 1470 | assert_eq!(remaining.len(), 1); |
| 1471 | assert_eq!(remaining[0].label, "turn:2"); |
| 1472 | |
| 1473 | // New snapshot starts a clean chain (not appending to old). |
| 1474 | std::fs::write(repo.work_tree().join("f.txt"), "fresh").unwrap(); |
| 1475 | repo.snapshot("turn:new").unwrap(); |
| 1476 | assert_eq!(repo.list(usize::MAX).unwrap().len(), 2); |
| 1477 | } |
| 1478 | |
| 1479 | #[test] |
| 1480 | fn prune_keep_last_n_preserves_multiple_snapshots_in_order() { |
| 1481 | let tmp = tempdir().unwrap(); |
| 1482 | let (repo, _home) = make_repo(tmp.path()); |
| 1483 | |
| 1484 | for i in 0..4 { |
| 1485 | std::fs::write(repo.work_tree().join("f.txt"), format!("v{i}")).unwrap(); |
| 1486 | repo.snapshot(&format!("turn:{i}")).unwrap(); |
| 1487 | std::thread::sleep(Duration::from_millis(1100)); |
| 1488 | } |
| 1489 | |
| 1490 | assert_eq!(repo.list(usize::MAX).unwrap().len(), 4); |
| 1491 | |
| 1492 | let removed = repo.prune_keep_last_n(2).unwrap(); |
| 1493 | assert_eq!(removed, 2); |
| 1494 | |
| 1495 | let remaining = repo.list(usize::MAX).unwrap(); |
| 1496 | assert_eq!(remaining.len(), 2); |
| 1497 | // Should be newest-first: turn:3 (newest), turn:2 (second newest) |
| 1498 | assert_eq!(remaining[0].label, "turn:3"); |
| 1499 | assert_eq!(remaining[1].label, "turn:2"); |
| 1500 | |
| 1501 | // New snapshot continues the chain. |
| 1502 | std::fs::write(repo.work_tree().join("f.txt"), "fresh").unwrap(); |
| 1503 | repo.snapshot("turn:new").unwrap(); |
| 1504 | let after = repo.list(usize::MAX).unwrap(); |
| 1505 | assert_eq!(after.len(), 3); |
| 1506 | assert_eq!(after[0].label, "turn:new"); |
| 1507 | } |
| 1508 | |
| 1509 | #[test] |
| 1510 | fn open_or_init_removes_stale_tmp_pack_files_only() { |
| 1511 | let tmp = tempdir().unwrap(); |
| 1512 | let (repo, _home) = make_repo(tmp.path()); |
| 1513 | let workspace = repo.work_tree().to_path_buf(); |
| 1514 | let pack_dir = repo.git_dir().join("objects").join("pack"); |
| 1515 | std::fs::create_dir_all(&pack_dir).unwrap(); |
| 1516 | |
| 1517 | let stale = pack_dir.join("tmp_pack_stale"); |
| 1518 | let fresh = pack_dir.join("tmp_pack_fresh"); |
| 1519 | let ordinary_pack = pack_dir.join("pack-kept.pack"); |
| 1520 | std::fs::write(&stale, b"stale").unwrap(); |
| 1521 | std::fs::write(&fresh, b"fresh").unwrap(); |
| 1522 | std::fs::write(&ordinary_pack, b"pack").unwrap(); |
| 1523 | |
| 1524 | let old_time = SystemTime::now() - STALE_TMP_PACK_AGE - Duration::from_secs(60); |
| 1525 | { |
| 1526 | let file = File::options().write(true).open(&stale).unwrap(); |
| 1527 | file.set_times(FileTimes::new().set_modified(old_time)) |
| 1528 | .unwrap(); |
| 1529 | } |
| 1530 | |
| 1531 | SnapshotRepo::open_or_init(&workspace).unwrap(); |
| 1532 | |
| 1533 | assert!(!stale.exists(), "stale tmp_pack file should be removed"); |
| 1534 | assert!(fresh.exists(), "fresh tmp_pack file should be kept"); |
| 1535 | assert!(ordinary_pack.exists(), "non-temp pack file should be kept"); |
| 1536 | } |
| 1537 | |
| 1538 | #[test] |
| 1539 | fn snapshot_respects_workspace_gitignore() { |
| 1540 | let tmp = tempdir().unwrap(); |
| 1541 | let (repo, _home) = make_repo(tmp.path()); |
| 1542 | std::fs::write(repo.work_tree().join(".gitignore"), "ignored.txt\n").unwrap(); |
| 1543 | std::fs::write(repo.work_tree().join("ignored.txt"), b"secret").unwrap(); |
| 1544 | std::fs::write(repo.work_tree().join("kept.txt"), b"public").unwrap(); |
| 1545 | |
| 1546 | let id = repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1547 | |
| 1548 | // `git ls-tree` against the snapshot's commit shouldn't list ignored.txt. |
| 1549 | let ls = run_git( |
| 1550 | repo.git_dir(), |
| 1551 | repo.work_tree(), |
| 1552 | &["ls-tree", "-r", "--name-only", id.as_str()], |
| 1553 | ) |
| 1554 | .expect("ls-tree"); |
| 1555 | let names = String::from_utf8_lossy(&ls.stdout); |
| 1556 | assert!(names.contains("kept.txt"), "kept.txt missing: {names}"); |
| 1557 | assert!( |
| 1558 | !names.contains("ignored.txt"), |
| 1559 | "ignored.txt should not be in snapshot: {names}", |
| 1560 | ); |
| 1561 | } |
| 1562 | |
| 1563 | #[test] |
| 1564 | fn unsafe_workspace_rejects_home_directory_workspace() { |
| 1565 | let tmp = tempdir().unwrap(); |
| 1566 | let home = tmp.path(); |
| 1567 | |
| 1568 | assert_eq!( |
| 1569 | unsafe_workspace_snapshot_reason(home, Some(home)), |
| 1570 | Some("home directory") |
| 1571 | ); |
| 1572 | } |
| 1573 | |
| 1574 | #[test] |
| 1575 | fn unsafe_workspace_rejects_home_collection_directories() { |
| 1576 | let tmp = tempdir().unwrap(); |
| 1577 | let home = tmp.path(); |
| 1578 | let desktop = tmp.path().join("Desktop"); |
| 1579 | std::fs::create_dir_all(&desktop).unwrap(); |
| 1580 | |
| 1581 | assert_eq!( |
| 1582 | unsafe_workspace_snapshot_reason(&desktop, Some(home)), |
| 1583 | Some("home collection directory") |
| 1584 | ); |
| 1585 | } |
| 1586 | |
| 1587 | #[test] |
| 1588 | fn unsafe_workspace_allows_project_directories_under_home() { |
| 1589 | let tmp = tempdir().unwrap(); |
| 1590 | let home = tmp.path(); |
| 1591 | let workspace = tmp.path().join("code").join("project"); |
| 1592 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1593 | |
| 1594 | assert_eq!( |
| 1595 | unsafe_workspace_snapshot_reason(&workspace, Some(home)), |
| 1596 | None |
| 1597 | ); |
| 1598 | } |
| 1599 | |
| 1600 | #[test] |
| 1601 | fn snapshot_respects_builtin_excludes() { |
| 1602 | let tmp = tempdir().unwrap(); |
| 1603 | let (repo, _home) = make_repo(tmp.path()); |
| 1604 | std::fs::create_dir_all(repo.work_tree().join("node_modules/pkg")).unwrap(); |
| 1605 | std::fs::create_dir_all(repo.work_tree().join(".next/cache")).unwrap(); |
| 1606 | std::fs::create_dir_all(repo.work_tree().join("src")).unwrap(); |
| 1607 | std::fs::write( |
| 1608 | repo.work_tree().join("node_modules/pkg/index.js"), |
| 1609 | b"generated", |
| 1610 | ) |
| 1611 | .unwrap(); |
| 1612 | std::fs::write(repo.work_tree().join(".next/cache/chunk.bin"), b"generated").unwrap(); |
| 1613 | std::fs::write(repo.work_tree().join("debug.wasm"), b"binary").unwrap(); |
| 1614 | std::fs::write(repo.work_tree().join("src/main.rs"), b"fn main() {}").unwrap(); |
| 1615 | |
| 1616 | let excludes = std::fs::read_to_string(repo.git_dir().join("info/exclude")).unwrap(); |
| 1617 | assert!(excludes.contains("node_modules/")); |
| 1618 | assert!(excludes.contains(".next/")); |
| 1619 | assert!(excludes.contains("*.wasm")); |
| 1620 | |
| 1621 | let id = repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1622 | let ls = run_git( |
| 1623 | repo.git_dir(), |
| 1624 | repo.work_tree(), |
| 1625 | &["ls-tree", "-r", "--name-only", id.as_str()], |
| 1626 | ) |
| 1627 | .expect("ls-tree"); |
| 1628 | let names = String::from_utf8_lossy(&ls.stdout); |
| 1629 | assert!( |
| 1630 | names.contains("src/main.rs"), |
| 1631 | "src/main.rs missing: {names}" |
| 1632 | ); |
| 1633 | assert!( |
| 1634 | !names.contains("node_modules"), |
| 1635 | "node_modules should not be in snapshot: {names}", |
| 1636 | ); |
| 1637 | assert!( |
| 1638 | !names.contains(".next"), |
| 1639 | ".next should not be in snapshot: {names}", |
| 1640 | ); |
| 1641 | assert!( |
| 1642 | !names.contains("debug.wasm"), |
| 1643 | "binary artifacts should not be in snapshot: {names}", |
| 1644 | ); |
| 1645 | } |
| 1646 | |
| 1647 | #[test] |
| 1648 | fn open_or_init_is_idempotent() { |
| 1649 | let tmp = tempdir().unwrap(); |
| 1650 | let (_r, _h) = make_repo(tmp.path()); |
| 1651 | // Second open should not panic and should reuse the existing |
| 1652 | // `.git`. We re-open via the public API rather than make_repo to |
| 1653 | // avoid double-acquiring HOME (the guard would deadlock). |
| 1654 | drop((_r, _h)); |
| 1655 | let (_r2, _h2) = make_repo(tmp.path()); |
| 1656 | } |
| 1657 | |
| 1658 | #[test] |
| 1659 | fn home_directory_guard_matches_canonical_paths() { |
| 1660 | let tmp = tempdir().unwrap(); |
| 1661 | let home = tmp.path(); |
| 1662 | let home_canonical = home.canonicalize().unwrap(); |
| 1663 | let workspace = home.join("workspace"); |
| 1664 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1665 | let workspace_canonical = workspace.canonicalize().unwrap(); |
| 1666 | |
| 1667 | assert!(is_home_directory(&home_canonical, Some(home))); |
| 1668 | assert!(!is_home_directory(&workspace_canonical, Some(home))); |
| 1669 | assert!(!is_home_directory(&home_canonical, None)); |
| 1670 | } |
| 1671 | |
| 1672 | #[test] |
| 1673 | fn dir_size_bytes_measures_directory_bytes() { |
| 1674 | let tmp = tempdir().unwrap(); |
| 1675 | let dir = tmp.path().join("sizedir"); |
| 1676 | std::fs::create_dir_all(dir.join("sub")).unwrap(); |
| 1677 | // 3 bytes per file. |
| 1678 | std::fs::write(dir.join("a.txt"), b"abc").unwrap(); |
| 1679 | std::fs::write(dir.join("sub/b.txt"), b"xyz").unwrap(); |
| 1680 | |
| 1681 | let size = dir_size_bytes(&dir).expect("dir_size_bytes"); |
| 1682 | assert_eq!(size, 6, "two 3-byte files should measure 6 bytes"); |
| 1683 | |
| 1684 | // Write 2 MB of data. |
| 1685 | let big = dir.join("big.bin"); |
| 1686 | std::fs::write(&big, vec![0u8; 2 * 1024 * 1024]).unwrap(); |
| 1687 | let size = dir_size_bytes(&dir).expect("dir_size_bytes after big write"); |
| 1688 | assert_eq!( |
| 1689 | size, |
| 1690 | 2 * 1024 * 1024 + 6, |
| 1691 | "expected 2 MB + 6 bytes after writing a 2 MB file" |
| 1692 | ); |
| 1693 | } |
| 1694 | |
| 1695 | /// Regression: snapshot size cap (#1112). When the snapshot dir grows, |
| 1696 | /// `snapshot()` must prune old snapshots to stay under the limit. |
| 1697 | /// This test uses the real size constants, which are 500/400 MB — |
| 1698 | /// we can't easily blow up a temp dir to 500 MB in a unit test. |
| 1699 | /// Instead we verify the guard logic doesn't panic or error on a |
| 1700 | /// small repo (well under the cap), and that `snapshot()` still works. |
| 1701 | #[test] |
| 1702 | fn snapshot_succeeds_when_under_size_cap() { |
| 1703 | let tmp = tempdir().unwrap(); |
| 1704 | let (repo, _home) = make_repo(tmp.path()); |
| 1705 | // The side repo is tiny — well under 500 MB. Snapshot should work. |
| 1706 | std::fs::write(repo.work_tree().join("f.txt"), b"hello").unwrap(); |
| 1707 | let id = repo.snapshot("pre-turn:1").expect("snapshot under cap"); |
| 1708 | assert_eq!(id.as_str().len(), 40); |
| 1709 | } |
| 1710 | |
| 1711 | #[test] |
| 1712 | fn prune_size_pressure_counts_and_removes_history_when_over_limit() { |
| 1713 | let tmp = tempdir().unwrap(); |
| 1714 | let (repo, _home) = make_repo(tmp.path()); |
| 1715 | for i in 0..3 { |
| 1716 | std::fs::write(repo.work_tree().join("f.txt"), format!("v{i}")).unwrap(); |
| 1717 | repo.snapshot(&format!("pre-turn:{i}")).expect("snapshot"); |
| 1718 | } |
| 1719 | assert_eq!(repo.list(usize::MAX).unwrap().len(), 3); |
| 1720 | // A zero byte limit makes any non-empty side repo "over limit", so the |
| 1721 | // prune must run and report exactly what it destroyed. This is the S5 |
| 1722 | // wipe path; the count is what the user-visible notice is built from. |
| 1723 | let removed = repo.prune_size_pressure(0, 0).expect("prune_size_pressure"); |
| 1724 | assert_eq!(removed, 3, "every snapshot must be reported as removed"); |
| 1725 | assert!( |
| 1726 | repo.list(usize::MAX).unwrap().is_empty(), |
| 1727 | "history should be empty after the forced wipe" |
| 1728 | ); |
| 1729 | } |
| 1730 | |
| 1731 | #[test] |
| 1732 | fn prune_size_pressure_is_a_noop_under_the_limit() { |
| 1733 | let tmp = tempdir().unwrap(); |
| 1734 | let (repo, _home) = make_repo(tmp.path()); |
| 1735 | std::fs::write(repo.work_tree().join("f.txt"), b"v0").unwrap(); |
| 1736 | repo.snapshot("pre-turn:0").expect("snapshot"); |
| 1737 | let removed = repo |
| 1738 | .prune_size_pressure(u64::MAX, u64::MAX) |
| 1739 | .expect("prune_size_pressure"); |
| 1740 | assert_eq!(removed, 0, "under the limit nothing may be removed"); |
| 1741 | assert_eq!(repo.list(usize::MAX).unwrap().len(), 1); |
| 1742 | } |
| 1743 | |
| 1744 | #[test] |
| 1745 | fn snapshot_history_pruned_message_names_workspace_count_and_cap() { |
| 1746 | let msg = snapshot_history_pruned_message(Path::new("/tmp/ws"), 7); |
| 1747 | assert!(msg.contains("/tmp/ws"), "message must name the workspace"); |
| 1748 | assert!(msg.contains("7"), "message must state the removed count"); |
| 1749 | assert!( |
| 1750 | msg.contains(&MAX_SNAPSHOT_SIZE_MB.to_string()), |
| 1751 | "message must state the storage cap" |
| 1752 | ); |
| 1753 | } |
| 1754 | |
| 1755 | #[test] |
| 1756 | fn estimate_workspace_size_bounded_returns_total_when_under_cap() { |
| 1757 | let tmp = tempdir().unwrap(); |
| 1758 | let workspace = tmp.path().join("workspace"); |
| 1759 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1760 | std::fs::write(workspace.join("a.txt"), vec![b'a'; 100]).unwrap(); |
| 1761 | std::fs::write(workspace.join("b.txt"), vec![b'b'; 50]).unwrap(); |
| 1762 | let total = estimate_workspace_size_bounded(&workspace, 10_000) |
| 1763 | .expect("under-cap walk must return Some"); |
| 1764 | assert!( |
| 1765 | total >= 150, |
| 1766 | "total ({total}) must include both files (≥150 bytes)" |
| 1767 | ); |
| 1768 | } |
| 1769 | |
| 1770 | #[test] |
| 1771 | fn estimate_workspace_size_bounded_returns_none_when_over_cap() { |
| 1772 | let tmp = tempdir().unwrap(); |
| 1773 | let workspace = tmp.path().join("workspace"); |
| 1774 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1775 | // Two 1 KB files, cap at 1 KB — second file should trip the cap. |
| 1776 | std::fs::write(workspace.join("a.bin"), vec![b'a'; 1024]).unwrap(); |
| 1777 | std::fs::write(workspace.join("b.bin"), vec![b'b'; 1024]).unwrap(); |
| 1778 | assert!( |
| 1779 | estimate_workspace_size_bounded(&workspace, 1024).is_none(), |
| 1780 | "over-cap walk must return None for early bailout" |
| 1781 | ); |
| 1782 | } |
| 1783 | |
| 1784 | #[test] |
| 1785 | fn estimate_workspace_size_bounded_skips_builtin_excluded_dirs() { |
| 1786 | let tmp = tempdir().unwrap(); |
| 1787 | let workspace = tmp.path().join("workspace"); |
| 1788 | std::fs::create_dir_all(workspace.join("node_modules")).unwrap(); |
| 1789 | std::fs::create_dir_all(workspace.join("target")).unwrap(); |
| 1790 | std::fs::create_dir_all(workspace.join("src")).unwrap(); |
| 1791 | // 2 MB of "build output" in excluded dirs — must not count toward |
| 1792 | // the cap. |
| 1793 | std::fs::write(workspace.join("node_modules/big.bin"), vec![0u8; 1_000_000]).unwrap(); |
| 1794 | std::fs::write(workspace.join("target/big.bin"), vec![0u8; 1_000_000]).unwrap(); |
| 1795 | std::fs::write(workspace.join("src/lib.rs"), b"// real source").unwrap(); |
| 1796 | let total = estimate_workspace_size_bounded(&workspace, 500_000) |
| 1797 | .expect("walk must succeed since real source is tiny"); |
| 1798 | assert!( |
| 1799 | total < 1_000, |
| 1800 | "total ({total}) must reflect only src/, not node_modules/ or target/" |
| 1801 | ); |
| 1802 | } |
| 1803 | |
| 1804 | #[test] |
| 1805 | fn estimate_workspace_size_bounded_cap_zero_disables_cap() { |
| 1806 | let tmp = tempdir().unwrap(); |
| 1807 | let workspace = tmp.path().join("workspace"); |
| 1808 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1809 | // 10 KB file — would trip a 1 KB cap, but cap=0 means no cap. |
| 1810 | std::fs::write(workspace.join("big.bin"), vec![0u8; 10 * 1024]).unwrap(); |
| 1811 | let total = |
| 1812 | estimate_workspace_size_bounded(&workspace, 0).expect("cap=0 must always return Some"); |
| 1813 | assert!( |
| 1814 | total >= 10 * 1024, |
| 1815 | "total ({total}) must include the 10 KB file when cap is disabled" |
| 1816 | ); |
| 1817 | } |
| 1818 | |
| 1819 | #[test] |
| 1820 | fn open_or_init_with_cap_rejects_oversized_workspace() { |
| 1821 | let tmp = tempdir().unwrap(); |
| 1822 | let workspace = tmp.path().join("workspace"); |
| 1823 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1824 | let _home = scoped_home(tmp.path()); |
| 1825 | // Drop a 4 KB file under a 1 KB cap. |
| 1826 | std::fs::write(workspace.join("big.bin"), vec![0u8; 4096]).unwrap(); |
| 1827 | let outcome = SnapshotRepo::open_or_init_with_cap(&workspace, 1024); |
| 1828 | let err = match outcome { |
| 1829 | Ok(_) => panic!("oversized workspace must fail open_or_init_with_cap"), |
| 1830 | Err(e) => e, |
| 1831 | }; |
| 1832 | let msg = err.to_string(); |
| 1833 | assert!( |
| 1834 | msg.contains("workspace too large for snapshots"), |
| 1835 | "error must call out the size cap; got: {msg}" |
| 1836 | ); |
| 1837 | assert!( |
| 1838 | msg.contains("max_workspace_gb"), |
| 1839 | "error must reference the config knob users can raise; got: {msg}" |
| 1840 | ); |
| 1841 | } |
| 1842 | |
| 1843 | #[test] |
| 1844 | fn open_or_init_with_cap_zero_disables_size_check() { |
| 1845 | let tmp = tempdir().unwrap(); |
| 1846 | let workspace = tmp.path().join("workspace"); |
| 1847 | std::fs::create_dir_all(&workspace).unwrap(); |
| 1848 | let _home = scoped_home(tmp.path()); |
| 1849 | // 4 KB file but cap=0 → should still succeed. |
| 1850 | std::fs::write(workspace.join("big.bin"), vec![0u8; 4096]).unwrap(); |
| 1851 | let repo = SnapshotRepo::open_or_init_with_cap(&workspace, 0) |
| 1852 | .expect("cap=0 must skip the size check"); |
| 1853 | let id = repo |
| 1854 | .snapshot("pre-turn:1") |
| 1855 | .expect("snapshot under disabled cap"); |
| 1856 | assert_eq!(id.as_str().len(), 40); |
| 1857 | } |
| 1858 | |
| 1859 | #[test] |
| 1860 | fn session_tagged_snapshot_round_trips_through_list() { |
| 1861 | let tmp = tempdir().unwrap(); |
| 1862 | let (repo, _home) = make_repo(tmp.path()); |
| 1863 | std::fs::write(repo.work_tree().join("a.txt"), b"x").unwrap(); |
| 1864 | |
| 1865 | repo.snapshot_with_session("pre-turn:1", Some("sess-42")) |
| 1866 | .expect("snapshot with session"); |
| 1867 | |
| 1868 | let list = repo.list(10).expect("list"); |
| 1869 | assert_eq!(list.len(), 1); |
| 1870 | // The visible label stays clean; the session id is decoded separately. |
| 1871 | assert_eq!(list[0].label, "pre-turn:1"); |
| 1872 | assert_eq!(list[0].session_id.as_deref(), Some("sess-42")); |
| 1873 | } |
| 1874 | |
| 1875 | #[test] |
| 1876 | fn untagged_snapshot_decodes_without_session() { |
| 1877 | let tmp = tempdir().unwrap(); |
| 1878 | let (repo, _home) = make_repo(tmp.path()); |
| 1879 | std::fs::write(repo.work_tree().join("a.txt"), b"x").unwrap(); |
| 1880 | |
| 1881 | repo.snapshot("pre-turn:1").expect("snapshot"); |
| 1882 | |
| 1883 | let list = repo.list(10).expect("list"); |
| 1884 | assert_eq!(list.len(), 1); |
| 1885 | assert_eq!(list[0].label, "pre-turn:1"); |
| 1886 | assert_eq!(list[0].session_id, None); |
| 1887 | } |
| 1888 | |
| 1889 | #[test] |
| 1890 | fn prune_keep_last_n_preserves_session_tags() { |
| 1891 | let tmp = tempdir().unwrap(); |
| 1892 | let (repo, _home) = make_repo(tmp.path()); |
| 1893 | let file = repo.work_tree().join("a.txt"); |
| 1894 | |
| 1895 | // More snapshots than DEFAULT_MAX_SNAPSHOTS (50) so the survivor |
| 1896 | // chain is rebuilt as orphan commits — the path that previously |
| 1897 | // dropped the [sid=...] label prefix and turned every surviving |
| 1898 | // snapshot into a "legacy" (untagged) one. |
| 1899 | for i in 0..55 { |
| 1900 | std::fs::write(&file, format!("v{i}")).unwrap(); |
| 1901 | repo.snapshot_with_session(&format!("pre-turn:{i}"), Some("sess-p")) |
| 1902 | .expect("tagged snapshot"); |
| 1903 | } |
| 1904 | |
| 1905 | let removed = repo.prune_keep_last_n(50).expect("prune"); |
| 1906 | assert!(removed > 0, "expected prune to drop older snapshots"); |
| 1907 | |
| 1908 | let list = repo.list(usize::MAX).expect("list"); |
| 1909 | assert_eq!(list.len(), 50); |
| 1910 | assert!( |
| 1911 | list.iter() |
| 1912 | .all(|s| s.session_id.as_deref() == Some("sess-p")), |
| 1913 | "prune must preserve [sid=...] prefixes; got untagged survivors" |
| 1914 | ); |
| 1915 | } |
| 1916 | |
| 1917 | #[test] |
| 1918 | fn tagged_and_untagged_snapshots_coexist_in_one_chain() { |
| 1919 | let tmp = tempdir().unwrap(); |
| 1920 | let (repo, _home) = make_repo(tmp.path()); |
| 1921 | std::fs::write(repo.work_tree().join("a.txt"), b"v1").unwrap(); |
| 1922 | |
| 1923 | // Legacy untagged snapshot, then a session-tagged one. |
| 1924 | repo.snapshot("pre-turn:1").expect("legacy snapshot"); |
| 1925 | std::fs::write(repo.work_tree().join("a.txt"), b"v2").unwrap(); |
| 1926 | repo.snapshot_with_session("pre-turn:1", Some("sess-a")) |
| 1927 | .expect("tagged snapshot"); |
| 1928 | |
| 1929 | let list = repo.list(10).expect("list"); |
| 1930 | assert_eq!(list.len(), 2); |
| 1931 | // Newest first. |
| 1932 | assert_eq!(list[0].session_id.as_deref(), Some("sess-a")); |
| 1933 | assert_eq!(list[1].session_id, None); |
| 1934 | assert_eq!(list[1].label, "pre-turn:1"); |
| 1935 | } |
| 1936 | } |
| 1937 |