| 1 | package builtin |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "fmt" |
| 7 | |
| 8 | "reasonix/internal/sandbox" |
| 9 | "reasonix/internal/tool" |
| 10 | ) |
| 11 | |
| 12 | func init() { tool.RegisterBuiltin(multiEdit{}) } |
| 13 | |
| 14 | // multiEdit applies a batch of edits to one file. roots confines the target to |
| 15 | // the workspace when non-empty (see writeFile); guard rejects Reasonix |
| 16 | // session-data targets (see SessionDataGuard); workDir, when non-empty, is the |
| 17 | // directory a relative path resolves against (see resolveIn). |
| 18 | type multiEdit struct { |
| 19 | roots []string |
| 20 | rootSet *sandbox.WritableRootSet |
| 21 | guard SessionDataGuard |
| 22 | managed ManagedConfigPaths |
| 23 | workDir string |
| 24 | overlay FileOverlay |
| 25 | } |
| 26 | |
| 27 | // editStep is one edit in a multi_edit operation. Mirrors edit_file's args |
| 28 | // plus a per-step replace_all toggle so a single call can mix targeted and |
| 29 | // sweep replacements (e.g. rename a function with replace_all, then patch |
| 30 | // one specific call site with a unique-match edit). |
| 31 | type editStep struct { |
| 32 | OldString string `json:"old_string"` |
| 33 | NewString string `json:"new_string"` |
| 34 | ReplaceAll bool `json:"replace_all,omitempty"` |
| 35 | } |
| 36 | |
| 37 | func (multiEdit) Name() string { return "multi_edit" } |
| 38 | |
| 39 | func (multiEdit) Description() string { |
| 40 | return "Apply a list of edits to a single file atomically: each edit runs against the result of the previous one, all in memory; the file is rewritten only if every edit succeeds. Cheaper and safer than chaining edit_file calls — a failure in step 3 leaves the file untouched instead of half-edited." |
| 41 | } |
| 42 | |
| 43 | func (multiEdit) Schema() json.RawMessage { |
| 44 | return json.RawMessage(`{ |
| 45 | "type":"object", |
| 46 | "properties":{ |
| 47 | "path":{"type":"string","description":"File path"}, |
| 48 | "edits":{ |
| 49 | "type":"array", |
| 50 | "minItems":1, |
| 51 | "description":"Ordered edits. Each step sees the file as left by the previous step.", |
| 52 | "items":{ |
| 53 | "type":"object", |
| 54 | "properties":{ |
| 55 | "old_string":{"type":"string","description":"Exact text to find. Without replace_all, must match exactly once."}, |
| 56 | "new_string":{"type":"string","description":"Replacement text (empty deletes)."}, |
| 57 | "replace_all":{"type":"boolean","description":"Replace every occurrence instead of requiring uniqueness."} |
| 58 | }, |
| 59 | "required":["old_string","new_string"] |
| 60 | } |
| 61 | } |
| 62 | }, |
| 63 | "required":["path","edits"] |
| 64 | }`) |
| 65 | } |
| 66 | |
| 67 | func (multiEdit) ReadOnly() bool { return false } |
| 68 | |
| 69 | func (m multiEdit) DeclareWriteAccess(args json.RawMessage) (tool.WriteAccessDeclaration, error) { |
| 70 | return declareFilePathWriteAccess(m.workDir, args) |
| 71 | } |
| 72 | |
| 73 | func (m multiEdit) Execute(ctx context.Context, args json.RawMessage) (string, error) { |
| 74 | var p struct { |
| 75 | Path string `json:"path"` |
| 76 | Edits []editStep `json:"edits"` |
| 77 | } |
| 78 | if err := json.Unmarshal(args, &p); err != nil { |
| 79 | return "", fmt.Errorf("invalid args: %w", err) |
| 80 | } |
| 81 | if p.Path == "" { |
| 82 | return "", fmt.Errorf("path is required") |
| 83 | } |
| 84 | if len(p.Edits) == 0 { |
| 85 | return "", fmt.Errorf("edits must not be empty") |
| 86 | } |
| 87 | p.Path = resolveIn(m.workDir, p.Path) |
| 88 | if err := confineWrite(ctx, effectiveWriteRoots(ctx, m.rootSet, m.roots), m.guard, m.managed, p.Path); err != nil { |
| 89 | return "", err |
| 90 | } |
| 91 | unlock := lockMutationPath(p.Path) |
| 92 | defer unlock() |
| 93 | |
| 94 | src, err := readEditSource(ctx, m.overlay, p.Path) |
| 95 | if err != nil { |
| 96 | return "", fmt.Errorf("read %s: %w", p.Path, err) |
| 97 | } |
| 98 | if err := src.requireObserved(ctx, m.overlay, p.Path); err != nil { |
| 99 | return "", err |
| 100 | } |
| 101 | content := src.content |
| 102 | |
| 103 | // Apply edits in order against the running in-memory buffer. Any failure |
| 104 | // returns before the write, leaving the file untouched — that's the |
| 105 | // safety guarantee that makes multi_edit preferable to chained |
| 106 | // edit_file calls. |
| 107 | applied := 0 |
| 108 | usedFuzzy := false |
| 109 | receipts := make([]editReplacementReceipt, 0, len(p.Edits)) |
| 110 | for i, step := range p.Edits { |
| 111 | if step.OldString == "" { |
| 112 | return "", fmt.Errorf("edit %d: old_string is required", i+1) |
| 113 | } |
| 114 | result := applyOldStringEdit(content, step.OldString, step.NewString, step.ReplaceAll) |
| 115 | switch { |
| 116 | case result.applied > 0: |
| 117 | content = result.updated |
| 118 | applied += result.applied |
| 119 | usedFuzzy = usedFuzzy || result.fuzzy |
| 120 | receipts = append(receipts, result.receipt) |
| 121 | case result.matches == 0: |
| 122 | return "", fmt.Errorf("edit %d: %w", i+1, oldStringNotFoundError(p.Path, step.OldString, content)) |
| 123 | default: |
| 124 | return "", fmt.Errorf("edit %d: %w", i+1, oldStringNotUniqueError(p.Path, step.OldString, content, result.matches, true)) |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | if err := src.write(ctx, m.overlay, p.Path, content); err != nil { |
| 129 | return "", fmt.Errorf("write %s: %w", p.Path, err) |
| 130 | } |
| 131 | summary := fmt.Sprintf("multi_edit %s: %d edits applied (%d total replacements)", p.Path, len(p.Edits), applied) |
| 132 | if usedFuzzy { |
| 133 | summary += " (fuzzy match)" |
| 134 | } |
| 135 | return withActualPostWriteReceipts(summary, receipts), nil |
| 136 | } |
| 137 |