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/platform/tools/supported-target.mjs

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+
+import { open, readFile, rename, rm } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { randomUUID } from 'node:crypto'
+import { validateSupportedTarget, advanceSupportedDsh } from '../lib/supported-target.mjs'
+
+const args = process.argv.slice(2)
+const [command, targetArg, definitionArg, upstreamVersion] = args
+const expectedArguments = command === 'validate' ? 3 : command === 'advance' ? 4 : -1
+if (args.length !== expectedArguments) {
+  console.error('usage: supported-target.mjs <validate|advance> <supported-target.json> <environment-definition.json> [upstream-version]')
+  process.exit(64)
+}
+
+const targetPath = resolve(targetArg)
+const definitionPath = resolve(definitionArg)
+const target = validateSupportedTarget(await readFile(targetPath), await readFile(definitionPath))
+if (command === 'validate') {
+  process.stdout.write(`${JSON.stringify({ changed: false, target })}\n`)
+  process.exit(0)
+}
+
+const advanced = advanceSupportedDsh(target, upstreamVersion)
+if (advanced.changed) {
+  const temporary = `${targetPath}.${randomUUID()}.tmp`
+  const handle = await open(temporary, 'wx', 0o644)
+  try {
+    await handle.writeFile(`${JSON.stringify(advanced.target, null, 2)}\n`)
+    await handle.sync()
+    await handle.close()
+    await rename(temporary, targetPath)
+    const directory = await open(dirname(targetPath), 'r')
+    try {
+      await directory.sync()
+    } finally {
+      await directory.close()
+    }
+  } catch (error) {
+    await handle.close().catch(() => {})
+    await rm(temporary, { force: true })
+    throw error
+  }
+}
+process.stdout.write(`${JSON.stringify(advanced)}\n`)