| 1 | import { execFileSync } from "child_process"; |
| 2 | import { accessSync, constants, statSync } from "fs"; |
| 3 | import { homedir } from "os"; |
| 4 | import { delimiter, isAbsolute, join } from "path"; |
| 5 | |
| 6 | /** |
| 7 | * Locating the agent binary across launch contexts. |
| 8 | * |
| 9 | * When VS Code is launched from a GUI (Dock, Finder, Spotlight) rather than a |
| 10 | * terminal, the process inherits a minimal system PATH that omits the dirs |
| 11 | * where developer tools are usually installed (Homebrew, Cargo, ~/.local/bin, |
| 12 | * etc.). A `command` like `sigit` then fails to spawn with ENOENT even though |
| 13 | * it runs fine from the user's terminal. We work around this by resolving the |
| 14 | * command against an *augmented* PATH that adds the common install locations |
| 15 | * and, on macOS/Linux, the user's real login-shell PATH. |
| 16 | */ |
| 17 | |
| 18 | let cachedLoginPath: string | null | undefined; |
| 19 | |
| 20 | /** Common install directories that GUI launches frequently miss. */ |
| 21 | function commonBinDirs(): string[] { |
| 22 | const home = homedir(); |
| 23 | if (process.platform === "win32") { |
| 24 | return []; |
| 25 | } |
| 26 | return [ |
| 27 | "/usr/local/bin", |
| 28 | "/opt/homebrew/bin", |
| 29 | "/opt/homebrew/sbin", |
| 30 | "/usr/bin", |
| 31 | "/bin", |
| 32 | "/usr/sbin", |
| 33 | "/sbin", |
| 34 | join(home, ".local", "bin"), |
| 35 | join(home, "bin"), |
| 36 | join(home, ".cargo", "bin"), |
| 37 | join(home, ".bun", "bin"), |
| 38 | join(home, ".deno", "bin"), |
| 39 | join(home, "go", "bin"), |
| 40 | join(home, ".sigit", "bin") |
| 41 | ]; |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * The PATH exported by the user's interactive login shell. GUI-launched apps on |
| 46 | * macOS don't inherit this, so we ask the shell directly. Cached after the |
| 47 | * first (best-effort, time-boxed) lookup. |
| 48 | */ |
| 49 | function loginShellPath(): string | undefined { |
| 50 | if (cachedLoginPath !== undefined) { |
| 51 | return cachedLoginPath ?? undefined; |
| 52 | } |
| 53 | cachedLoginPath = null; |
| 54 | if (process.platform === "win32") { |
| 55 | return undefined; |
| 56 | } |
| 57 | const shell = process.env.SHELL || "/bin/zsh"; |
| 58 | try { |
| 59 | // `-ilc` → interactive login shell running one command. We echo a sentinel |
| 60 | // around PATH so noisy rc-file output doesn't corrupt the value. |
| 61 | const out = execFileSync(shell, ["-ilc", 'printf "__SIGIT_PATH__%s__SIGIT_END__" "$PATH"'], { |
| 62 | encoding: "utf8", |
| 63 | timeout: 3000, |
| 64 | stdio: ["ignore", "pipe", "ignore"] |
| 65 | }); |
| 66 | const match = /__SIGIT_PATH__([\s\S]*?)__SIGIT_END__/.exec(out); |
| 67 | if (match && match[1]) { |
| 68 | cachedLoginPath = match[1]; |
| 69 | } |
| 70 | } catch { |
| 71 | // Shell missing, slow, or non-interactive — fall back to common dirs only. |
| 72 | } |
| 73 | return cachedLoginPath ?? undefined; |
| 74 | } |
| 75 | |
| 76 | /** |
| 77 | * A PATH string combining the current process PATH, the login-shell PATH, and |
| 78 | * the common install dirs — de-duplicated, original order preserved. |
| 79 | */ |
| 80 | export function augmentedPath(): string { |
| 81 | const parts: string[] = []; |
| 82 | const seen = new Set<string>(); |
| 83 | const push = (value: string | undefined) => { |
| 84 | if (!value) { |
| 85 | return; |
| 86 | } |
| 87 | for (const dir of value.split(delimiter)) { |
| 88 | if (dir && !seen.has(dir)) { |
| 89 | seen.add(dir); |
| 90 | parts.push(dir); |
| 91 | } |
| 92 | } |
| 93 | }; |
| 94 | push(process.env.PATH); |
| 95 | push(loginShellPath()); |
| 96 | for (const dir of commonBinDirs()) { |
| 97 | push(dir); |
| 98 | } |
| 99 | return parts.join(delimiter); |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Sandbox-safe HuggingFace cache defaults. |
| 104 | * |
| 105 | * The on-device `sigit` agent redirects its model cache into a macOS App Group |
| 106 | * container (`~/Library/Group Containers/group.com.ondeinference.apps/…`) so it |
| 107 | * can share weights with the Onde Inference desktop app. That container is only |
| 108 | * writable by processes carrying the matching App Group entitlement; a `sigit` |
| 109 | * spawned by VS Code has none, so model downloads fail with EPERM ("Operation |
| 110 | * not permitted", os error 1). Pointing HF_HOME / HF_HUB_CACHE at the standard |
| 111 | * per-user cache keeps downloads in a directory the editor's child process can |
| 112 | * actually write to. These are *defaults* — a real env var or an agent's `env` |
| 113 | * entry still wins (see AcpClient.spawn). |
| 114 | */ |
| 115 | export function defaultModelCacheEnv(): Record<string, string> { |
| 116 | const hfHome = join(homedir(), ".cache", "huggingface"); |
| 117 | return { |
| 118 | HF_HOME: hfHome, |
| 119 | HF_HUB_CACHE: join(hfHome, "hub") |
| 120 | }; |
| 121 | } |
| 122 | |
| 123 | function isExecutableFile(p: string): boolean { |
| 124 | try { |
| 125 | if (!statSync(p).isFile()) { |
| 126 | return false; |
| 127 | } |
| 128 | if (process.platform === "win32") { |
| 129 | return true; |
| 130 | } |
| 131 | accessSync(p, constants.X_OK); |
| 132 | return true; |
| 133 | } catch { |
| 134 | return false; |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | /** On Windows, the suffixes that make a bare command name executable. */ |
| 139 | function windowsExts(): string[] { |
| 140 | const pathext = process.env.PATHEXT || ".COM;.EXE;.BAT;.CMD"; |
| 141 | return pathext.split(";").filter(Boolean); |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * Resolve `command` to an absolute executable path, searching `pathString` |
| 146 | * (defaults to the augmented PATH). Returns undefined when nothing matches. |
| 147 | * |
| 148 | * An absolute or path-qualified command is returned as-is when it points at an |
| 149 | * executable file, so explicit user configuration always wins. |
| 150 | */ |
| 151 | export function resolveExecutable(command: string, pathString = augmentedPath()): string | undefined { |
| 152 | if (!command) { |
| 153 | return undefined; |
| 154 | } |
| 155 | |
| 156 | const hasPathSep = command.includes("/") || command.includes("\\"); |
| 157 | if (isAbsolute(command) || hasPathSep) { |
| 158 | if (isExecutableFile(command)) { |
| 159 | return command; |
| 160 | } |
| 161 | if (process.platform === "win32") { |
| 162 | for (const ext of windowsExts()) { |
| 163 | const candidate = command + ext; |
| 164 | if (isExecutableFile(candidate)) { |
| 165 | return candidate; |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | return undefined; |
| 170 | } |
| 171 | |
| 172 | for (const dir of pathString.split(delimiter)) { |
| 173 | if (!dir) { |
| 174 | continue; |
| 175 | } |
| 176 | const base = join(dir, command); |
| 177 | if (isExecutableFile(base)) { |
| 178 | return base; |
| 179 | } |
| 180 | if (process.platform === "win32") { |
| 181 | for (const ext of windowsExts()) { |
| 182 | const candidate = base + ext; |
| 183 | if (isExecutableFile(candidate)) { |
| 184 | return candidate; |
| 185 | } |
| 186 | } |
| 187 | } |
| 188 | } |
| 189 | return undefined; |
| 190 | } |