migrate: move flock and hash utilities to shared package (#22640)

packages/shared/src/global.ts

@@ -0,0 +1,42 @@
+import path from "path"
+import { xdgData, xdgCache, xdgConfig, xdgState } from "xdg-basedir"
+import os from "os"
+import { Context, Effect, Layer } from "effect"
+
+export namespace Global {
+  export class Service extends Context.Service<Service, Interface>()("@opencode/Global") {}
+
+  export interface Interface {
+    readonly home: string
+    readonly data: string
+    readonly cache: string
+    readonly config: string
+    readonly state: string
+    readonly bin: string
+    readonly log: string
+  }
+
+  export const layer = Layer.effect(
+    Service,
+    Effect.gen(function* () {
+      const app = "opencode"
+      const home = process.env.OPENCODE_TEST_HOME ?? os.homedir()
+      const data = path.join(xdgData!, app)
+      const cache = path.join(xdgCache!, app)
+      const cfg = path.join(xdgConfig!, app)
+      const state = path.join(xdgState!, app)
+      const bin = path.join(cache, "bin")
+      const log = path.join(data, "log")
+
+      return Service.of({
+        home,
+        data,
+        cache,
+        config: cfg,
+        state,
+        bin,
+        log,
+      })
+    }),
+  )
+}