| 1 | // Command windows-resource stamps Reasonix branding and metadata into a Windows |
| 2 | // support executable after it has been built. Wails already uses the same |
| 3 | // winres library for the desktop executable; keeping the support binaries on the |
| 4 | // same resource path avoids generic Explorer, shortcut, and taskbar icons. |
| 5 | package main |
| 6 | |
| 7 | import ( |
| 8 | "bytes" |
| 9 | "errors" |
| 10 | "flag" |
| 11 | "fmt" |
| 12 | "io" |
| 13 | "os" |
| 14 | "path/filepath" |
| 15 | "strconv" |
| 16 | "strings" |
| 17 | |
| 18 | "github.com/tc-hib/winres" |
| 19 | "github.com/tc-hib/winres/version" |
| 20 | ) |
| 21 | |
| 22 | const ( |
| 23 | companyName = "Reasonix" |
| 24 | copyright = "Copyright © 2026 Reasonix Contributors" |
| 25 | ) |
| 26 | |
| 27 | type resourceOptions struct { |
| 28 | executable string |
| 29 | icon string |
| 30 | numericVersion string |
| 31 | fileDescription string |
| 32 | internalName string |
| 33 | originalName string |
| 34 | } |
| 35 | |
| 36 | func main() { |
| 37 | if err := run(os.Args[1:]); err != nil { |
| 38 | fmt.Fprintln(os.Stderr, "windows-resource:", err) |
| 39 | os.Exit(1) |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | func run(args []string) error { |
| 44 | fs := flag.NewFlagSet("windows-resource", flag.ContinueOnError) |
| 45 | fs.SetOutput(io.Discard) |
| 46 | var opts resourceOptions |
| 47 | fs.StringVar(&opts.executable, "exe", "", "Windows executable to stamp") |
| 48 | fs.StringVar(&opts.icon, "icon", "", "ICO file to embed") |
| 49 | fs.StringVar(&opts.numericVersion, "version", "", "numeric X.Y.Z version") |
| 50 | fs.StringVar(&opts.fileDescription, "description", "", "Windows FileDescription") |
| 51 | fs.StringVar(&opts.internalName, "internal-name", "", "Windows InternalName") |
| 52 | fs.StringVar(&opts.originalName, "original-filename", "", "Windows OriginalFilename") |
| 53 | if err := fs.Parse(args); err != nil { |
| 54 | return err |
| 55 | } |
| 56 | if fs.NArg() != 0 { |
| 57 | return fmt.Errorf("unexpected arguments: %s", strings.Join(fs.Args(), " ")) |
| 58 | } |
| 59 | for name, value := range map[string]string{ |
| 60 | "-exe": opts.executable, |
| 61 | "-icon": opts.icon, |
| 62 | "-version": opts.numericVersion, |
| 63 | "-description": opts.fileDescription, |
| 64 | "-internal-name": opts.internalName, |
| 65 | "-original-filename": opts.originalName, |
| 66 | } { |
| 67 | if strings.TrimSpace(value) == "" { |
| 68 | return fmt.Errorf("%s is required", name) |
| 69 | } |
| 70 | } |
| 71 | return stampExecutable(opts) |
| 72 | } |
| 73 | |
| 74 | func stampExecutable(opts resourceOptions) error { |
| 75 | numericVersion, err := parseNumericVersion(opts.numericVersion) |
| 76 | if err != nil { |
| 77 | return err |
| 78 | } |
| 79 | |
| 80 | iconFile, err := os.Open(opts.icon) |
| 81 | if err != nil { |
| 82 | return fmt.Errorf("open icon: %w", err) |
| 83 | } |
| 84 | ico, err := winres.LoadICO(iconFile) |
| 85 | closeErr := iconFile.Close() |
| 86 | if err != nil { |
| 87 | return fmt.Errorf("load icon: %w", err) |
| 88 | } |
| 89 | if closeErr != nil { |
| 90 | return fmt.Errorf("close icon: %w", closeErr) |
| 91 | } |
| 92 | |
| 93 | rs := winres.ResourceSet{} |
| 94 | if err := rs.SetIcon(winres.ID(1), ico); err != nil { |
| 95 | return fmt.Errorf("set icon: %w", err) |
| 96 | } |
| 97 | rs.SetManifest(winres.AppManifest{ |
| 98 | Identity: winres.AssemblyIdentity{ |
| 99 | Name: "Reasonix." + opts.internalName, |
| 100 | Version: numericVersion, |
| 101 | }, |
| 102 | Description: opts.fileDescription, |
| 103 | ExecutionLevel: winres.AsInvoker, |
| 104 | DPIAwareness: winres.DPIPerMonitorV2, |
| 105 | LongPathAware: true, |
| 106 | UseCommonControlsV6: true, |
| 107 | }) |
| 108 | |
| 109 | info := version.Info{ |
| 110 | FileVersion: numericVersion, |
| 111 | ProductVersion: numericVersion, |
| 112 | } |
| 113 | for key, value := range map[string]string{ |
| 114 | version.CompanyName: companyName, |
| 115 | version.FileDescription: opts.fileDescription, |
| 116 | version.FileVersion: opts.numericVersion, |
| 117 | version.InternalName: opts.internalName, |
| 118 | version.LegalCopyright: copyright, |
| 119 | version.OriginalFilename: opts.originalName, |
| 120 | version.ProductName: "Reasonix", |
| 121 | version.ProductVersion: opts.numericVersion, |
| 122 | version.Comments: "Reasonix desktop support component.", |
| 123 | } { |
| 124 | if err := info.Set(version.LangDefault, key, value); err != nil { |
| 125 | return fmt.Errorf("set version field %s: %w", key, err) |
| 126 | } |
| 127 | } |
| 128 | rs.SetVersionInfo(info) |
| 129 | |
| 130 | source, err := os.ReadFile(opts.executable) |
| 131 | if err != nil { |
| 132 | return fmt.Errorf("read executable: %w", err) |
| 133 | } |
| 134 | var stamped bytes.Buffer |
| 135 | if err := rs.WriteToEXE(&stamped, bytes.NewReader(source)); err != nil { |
| 136 | return fmt.Errorf("write resources: %w", err) |
| 137 | } |
| 138 | if err := verifyResources(stamped.Bytes(), opts, numericVersion); err != nil { |
| 139 | return fmt.Errorf("verify resources: %w", err) |
| 140 | } |
| 141 | |
| 142 | mode := os.FileMode(0o755) |
| 143 | if stat, err := os.Stat(opts.executable); err == nil { |
| 144 | mode = stat.Mode() |
| 145 | } |
| 146 | if err := replaceFile(opts.executable, stamped.Bytes(), mode); err != nil { |
| 147 | return fmt.Errorf("replace executable: %w", err) |
| 148 | } |
| 149 | return nil |
| 150 | } |
| 151 | |
| 152 | func parseNumericVersion(value string) ([4]uint16, error) { |
| 153 | parts := strings.Split(strings.TrimSpace(value), ".") |
| 154 | if len(parts) != 3 && len(parts) != 4 { |
| 155 | return [4]uint16{}, fmt.Errorf("version %q must have three or four numeric parts", value) |
| 156 | } |
| 157 | var parsed [4]uint16 |
| 158 | for i, part := range parts { |
| 159 | if part == "" { |
| 160 | return [4]uint16{}, fmt.Errorf("version %q contains an empty part", value) |
| 161 | } |
| 162 | n, err := strconv.ParseUint(part, 10, 16) |
| 163 | if err != nil { |
| 164 | return [4]uint16{}, fmt.Errorf("version %q is not a Windows numeric version: %w", value, err) |
| 165 | } |
| 166 | parsed[i] = uint16(n) |
| 167 | } |
| 168 | return parsed, nil |
| 169 | } |
| 170 | |
| 171 | func verifyResources(executable []byte, opts resourceOptions, numericVersion [4]uint16) error { |
| 172 | rs, err := winres.LoadFromEXE(bytes.NewReader(executable)) |
| 173 | if err != nil { |
| 174 | return err |
| 175 | } |
| 176 | if _, err := rs.GetIcon(winres.ID(1)); err != nil { |
| 177 | return fmt.Errorf("application icon: %w", err) |
| 178 | } |
| 179 | manifest := rs.Get(winres.RT_MANIFEST, winres.ID(1), winres.LCIDDefault) |
| 180 | if len(manifest) == 0 || !bytes.Contains(manifest, []byte(`requestedExecutionLevel level="asInvoker"`)) { |
| 181 | return errors.New("asInvoker application manifest is missing") |
| 182 | } |
| 183 | versionData := rs.Get(winres.RT_VERSION, winres.ID(1), version.LangDefault) |
| 184 | info, err := version.FromBytes(versionData) |
| 185 | if err != nil { |
| 186 | return fmt.Errorf("version info: %w", err) |
| 187 | } |
| 188 | if info.FileVersion != numericVersion || info.ProductVersion != numericVersion { |
| 189 | return fmt.Errorf("numeric version mismatch: file=%v product=%v want=%v", info.FileVersion, info.ProductVersion, numericVersion) |
| 190 | } |
| 191 | table := info.Table()[version.LangDefault] |
| 192 | if table == nil { |
| 193 | return errors.New("English version string table is missing") |
| 194 | } |
| 195 | for key, want := range map[string]string{ |
| 196 | version.CompanyName: companyName, |
| 197 | version.FileDescription: opts.fileDescription, |
| 198 | version.InternalName: opts.internalName, |
| 199 | version.OriginalFilename: opts.originalName, |
| 200 | version.ProductName: "Reasonix", |
| 201 | } { |
| 202 | if got := (*table)[key]; got != want { |
| 203 | return fmt.Errorf("version field %s=%q, want %q", key, got, want) |
| 204 | } |
| 205 | } |
| 206 | return nil |
| 207 | } |
| 208 | |
| 209 | func replaceFile(path string, data []byte, mode os.FileMode) error { |
| 210 | temp, err := os.CreateTemp(filepath.Dir(path), ".reasonix-resource-*.exe") |
| 211 | if err != nil { |
| 212 | return err |
| 213 | } |
| 214 | tempName := temp.Name() |
| 215 | defer os.Remove(tempName) |
| 216 | if err := temp.Chmod(mode); err != nil { |
| 217 | temp.Close() |
| 218 | return err |
| 219 | } |
| 220 | if _, err := temp.Write(data); err != nil { |
| 221 | temp.Close() |
| 222 | return err |
| 223 | } |
| 224 | if err := temp.Sync(); err != nil { |
| 225 | temp.Close() |
| 226 | return err |
| 227 | } |
| 228 | if err := temp.Close(); err != nil { |
| 229 | return err |
| 230 | } |
| 231 | return os.Rename(tempName, path) |
| 232 | } |
| 233 |