mini: move frontend into tui package (#37754)

packages/cli/src/mini-host.ts

@@ -0,0 +1,209 @@
+import type { MiniFrontendInput } from "@opencode-ai/tui/mini"
+import { Flag } from "@opencode-ai/core/flag/flag"
+import { Global } from "@opencode-ai/core/global"
+import fs from "node:fs"
+import { mkdir, readFile, writeFile } from "node:fs/promises"
+import path from "node:path"
+import { ReadStream } from "node:tty"
+
+export const INTERACTIVE_INPUT_ERROR = "opencode mini requires a controlling terminal for input"
+
+export type InteractiveStdin = {
+  stdin: NodeJS.ReadStream
+  cleanup(): void
+}
+
+type MiniHost = MiniFrontendInput["host"]
+type ModelState = Record<string, unknown> & {
+  variant?: Record<string, string | undefined>
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return !!value && typeof value === "object" && !Array.isArray(value)
+}
+
+function state(value: unknown): ModelState {
+  if (!isRecord(value)) return {}
+  const variant = isRecord(value.variant)
+    ? Object.fromEntries(
+        Object.entries(value.variant).flatMap(([key, item]) =>
+          typeof item === "string" ? ([[key, item]] as const) : [],
+        ),
+      )
+    : undefined
+  return { ...value, variant }
+}
+
+function variantKey(model: NonNullable<MiniFrontendInput["model"]>) {
+  return `${model.providerID}/${model.modelID}`
+}
+
+function preferences(statePath: string): MiniHost["preferences"] {
+  const file = path.join(statePath, "model.json")
+  const read = () =>
+    readFile(file, "utf8")
+      .then((value) => state(JSON.parse(value)))
+      .catch(() => state(undefined))
+  return {
+    async resolveVariant(model) {
+      if (!model) return
+      return (await read()).variant?.[variantKey(model)]
+    },
+    async saveVariant(model, variant) {
+      if (!model) return
+      const current = await read()
+      const next = { ...current.variant }
+      if (variant) next[variantKey(model)] = variant
+      if (!variant) delete next[variantKey(model)]
+      await mkdir(path.dirname(file), { recursive: true })
+        .then(() => writeFile(file, JSON.stringify({ ...current, variant: next }, null, 2)))
+        .catch(() => {})
+    },
+  }
+}
+
+function signal(name: "SIGINT" | "SIGUSR2"): MiniHost["signals"]["sigint"] {
+  return {
+    subscribe(listener) {
+      let subscribed = true
+      process.on(name, listener)
+      return () => {
+        if (!subscribed) return
+        subscribed = false
+        process.off(name, listener)
+      }
+    },
+  }
+}
+
+function createTrace(
+  logPath: string,
+  diagnostics: Pick<MiniHost["diagnostics"], "pid" | "cwd" | "argv">,
+): MiniHost["diagnostics"]["trace"] {
+  if (!process.env.OPENCODE_DIRECT_TRACE) return
+  const stamp = new Date()
+    .toISOString()
+    .replace(/[-:]/g, "")
+    .replace(/\.\d+Z$/, "Z")
+  const target = path.join(logPath, "direct", `${stamp}-${diagnostics.pid}.jsonl`)
+  const text = (data: unknown) =>
+    JSON.stringify(data, (_key, value) => (typeof value === "bigint" ? String(value) : value), 0)
+  fs.mkdirSync(path.dirname(target), { recursive: true })
+  fs.writeFileSync(
+    path.join(logPath, "direct", "latest.json"),
+    text({
+      time: new Date().toISOString(),
+      ...diagnostics,
+      path: target,
+    }) + "\n",
+  )
+  const trace = {
+    write(type: string, data?: unknown) {
+      fs.appendFileSync(
+        target,
+        text({
+          time: new Date().toISOString(),
+          pid: diagnostics.pid,
+          type,
+          data,
+        }) + "\n",
+      )
+    },
+  }
+  trace.write("trace.start", {
+    argv: diagnostics.argv,
+    cwd: diagnostics.cwd,
+    path: target,
+  })
+  return trace
+}
+
+function openTerminalStdin(target: string): NodeJS.ReadStream {
+  return new ReadStream(fs.openSync(target, "r"))
+}
+
+export function resolveInteractiveStdin(
+  stdin: NodeJS.ReadStream = process.stdin,
+  open: (target: string) => NodeJS.ReadStream = openTerminalStdin,
+  platform: NodeJS.Platform = process.platform,
+): InteractiveStdin {
+  if (stdin.isTTY) return { stdin, cleanup() {} }
+  const target = platform === "win32" ? "CONIN$" : "/dev/tty"
+  try {
+    const source = open(target)
+    let cleaned = false
+    return {
+      stdin: source,
+      cleanup() {
+        if (cleaned) return
+        cleaned = true
+        source.destroy()
+      },
+    }
+  } catch (error) {
+    throw new Error(INTERACTIVE_INPUT_ERROR, { cause: error })
+  }
+}
+
+/** @internal Exported for owner-local resource cleanup tests. */
+export async function usingInteractiveStdin<T>(
+  run: (terminal: InteractiveStdin) => Promise<T>,
+  resolve: () => InteractiveStdin = resolveInteractiveStdin,
+) {
+  const terminal = resolve()
+  try {
+    return await run(terminal)
+  } finally {
+    terminal.cleanup()
+  }
+}
+
+/** @internal Exported for owner-local host capability tests. */
+export function createMiniHost(input: {
+  terminal: InteractiveStdin
+  directory: string
+  paths?: MiniHost["paths"]
+}): MiniHost {
+  const paths = input.paths ?? {
+    home: Global.Path.home,
+    state: Global.Path.state,
+    log: Global.Path.log,
+  }
+  const diagnostics = {
+    pid: process.pid,
+    cwd: input.directory,
+    argv: process.argv.slice(2),
+  }
+  return {
+    terminal: input.terminal,
+    platform: process.platform,
+    stdout: {
+      write(value) {
+        process.stdout.write(value)
+      },
+    },
+    files: {
+      readText: (url) => readFile(new URL(url), "utf8"),
+    },
+    editor: {
+      async open(options) {
+        const { openEditor } = await import("@opencode-ai/tui/editor")
+        return openEditor(options)
+      },
+    },
+    paths,
+    signals: {
+      sigint: signal("SIGINT"),
+      sigusr2: signal("SIGUSR2"),
+    },
+    startup: {
+      showTiming: Flag.OPENCODE_SHOW_TTFD,
+      now: () => performance.now(),
+    },
+    diagnostics: {
+      ...diagnostics,
+      trace: createTrace(paths.log, diagnostics),
+    },
+    preferences: preferences(paths.state),
+  }
+}