feat(project): resolve remote-backed project identity (#28914)

packages/core/src/git.ts

@@ -0,0 +1,111 @@
+export * as Git from "./git"
+
+import path from "path"
+import { Context, Effect, Layer } from "effect"
+import { ChildProcess } from "effect/unstable/process"
+import { AbsolutePath } from "./schema"
+import { AppFileSystem } from "./filesystem"
+import { AppProcess } from "./process"
+
+export interface Repo {
+  /**
+   * The root directory of the working tree that contains the input path.
+   *
+   * For `/home/me/app/src/file.ts` in a normal clone, this is `/home/me/app`.
+   * For `/home/me/app-feature/src/file.ts` in a linked worktree, this is
+   * `/home/me/app-feature`.
+   */
+  readonly directory: AbsolutePath
+  /**
+   * The shared Git storage directory used by this repo and any linked worktrees.
+   *
+   * For a normal clone at `/home/me/app`, this is usually `/home/me/app/.git`.
+   * For a linked worktree at `/home/me/app-feature` whose main checkout is
+   * `/home/me/app`, this is usually `/home/me/app/.git`.
+   */
+  readonly store: AbsolutePath
+}
+
+export interface Interface {
+  readonly find: (input: AbsolutePath) => Effect.Effect<Repo | undefined>
+  readonly remote: (repo: Repo, name?: string) => Effect.Effect<string | undefined>
+  readonly roots: (repo: Repo) => Effect.Effect<string[]>
+}
+
+export class Service extends Context.Service<Service, Interface>()("@opencode/GitV2") {}
+
+export const layer = Layer.effect(
+  Service,
+  Effect.gen(function* () {
+    const fs = yield* AppFileSystem.Service
+    const proc = yield* AppProcess.Service
+
+    const find = Effect.fn("Git.find")(function* (input: AbsolutePath) {
+      const dotgit = yield* fs.up({ targets: [".git"], start: input }).pipe(
+        Effect.map((matches) => matches[0]),
+        Effect.catch(() => Effect.succeed(undefined)),
+      )
+      if (!dotgit) return undefined
+
+      const cwd = path.dirname(dotgit)
+      const git = run(cwd, proc)
+      const topLevel = yield* git(["rev-parse", "--show-toplevel"])
+      const commonDir = yield* git(["rev-parse", "--git-common-dir"])
+      if (commonDir.exitCode !== 0) return undefined
+
+      return {
+        directory: AbsolutePath.make(topLevel.exitCode === 0 ? resolvePath(cwd, topLevel.text) : cwd),
+        store: AbsolutePath.make(resolvePath(cwd, commonDir.text)),
+      } satisfies Repo
+    })
+
+    const remote = Effect.fn("Git.remote")(function* (repo: Repo, name = "origin") {
+      const result = yield* run(repo.directory, proc)(["remote", "get-url", name])
+      if (result.exitCode !== 0) return undefined
+      return result.text.trim() || undefined
+    })
+
+    const roots = Effect.fn("Git.roots")(function* (repo: Repo) {
+      const result = yield* run(repo.directory, proc)(["rev-list", "--max-parents=0", "HEAD"])
+      if (result.exitCode !== 0) return []
+      return result.text
+        .split("\n")
+        .map((item) => item.trim())
+        .filter(Boolean)
+        .toSorted()
+    })
+
+    return Service.of({ find, remote, roots })
+  }),
+)
+
+export const defaultLayer = layer.pipe(Layer.provide(AppFileSystem.defaultLayer), Layer.provide(AppProcess.defaultLayer))
+
+interface Result {
+  readonly exitCode: number
+  readonly text: string
+}
+
+function run(cwd: string, proc: AppProcess.Interface) {
+  return (args: string[]) =>
+    proc
+      .run(
+        ChildProcess.make("git", args, {
+          cwd,
+          extendEnv: true,
+          stdin: "ignore",
+        }),
+      )
+      .pipe(
+        Effect.map((result) => ({ exitCode: result.exitCode, text: result.stdout.toString("utf8") } satisfies Result)),
+        Effect.catch(() => Effect.succeed({ exitCode: 1, text: "" } satisfies Result)),
+      )
+}
+
+function resolvePath(cwd: string, value: string) {
+  const trimmed = value.replace(/[\r\n]+$/, "")
+  if (!trimmed) return cwd
+  const normalized = AppFileSystem.windowsPath(trimmed)
+  if (path.isAbsolute(normalized)) return path.normalize(normalized)
+  return path.resolve(cwd, normalized)
+}