dsh 0.2.0-rc.2: in-container update (experimental channel), path-agnostic compose, upstream patches adapted to 0.1.x/0.2.x

upstream/container/control-plane/modules/updater/lib/state.mjs

@@ -0,0 +1,32 @@
+import { readFile } from 'node:fs/promises'
+import { durableReplace } from '../../../../platform/lib/atomic.mjs'
+
+export const TERMINAL_UPDATE_STATES = new Set(['idle', 'success', 'failed'])
+
+export class UpdateStateStore {
+  constructor(path, now = () => new Date()) {
+    this.path = path
+    this.now = now
+  }
+
+  async read() {
+    try {
+      return JSON.parse(await readFile(this.path, 'utf8'))
+    } catch (error) {
+      if (error?.code === 'ENOENT') return { status: 'idle', taskId: null, progress: 0, error: null }
+      throw error
+    }
+  }
+
+  async write(status, fields = {}) {
+    const previous = await this.read()
+    const next = {
+      ...previous,
+      ...fields,
+      status,
+      updatedAt: this.now().toISOString(),
+    }
+    await durableReplace(this.path, `${JSON.stringify(next)}\n`)
+    return Object.freeze(next)
+  }
+}