fix(repository-plugin): require published prepare dependency

packages/self-modification/repository-plugin/src/format.ts

@@ -14,11 +14,11 @@ export const PREPARED_ENTRY_FILENAME = 'dsh-plugin.mjs'
 export const PREPARED_ASSET_DIRECTORY = 'dsh-plugin-assets'
 /** Loader builtin used by every generated repository wrapper. */
 export const REPOSITORY_PLUGIN_BUILTIN = 'dsh-repository-plugin'
-/** Host-owned command that repository package `prepack` lifecycles must invoke. */
+/** Dependency-provided command that repository package `prepack` lifecycles must invoke. */
 export const REPOSITORY_PLUGIN_PREPARE_COMMAND = 'dsh-plugin-prepare'
 
 /**
- * Whether a package lifecycle declaration names the host preparation helper.
+ * Whether a package lifecycle declaration names the preparation dependency's helper.
  * @param script - package-authored lifecycle command.
  * @returns true when the required helper command is present.
  */

packages/self-modification/repository-plugin/src/index.ts

@@ -20,7 +20,6 @@ import {
 } from './format.ts'
 import { parseMcpDocument, resolveMcpServers } from './mcp.ts'
 import {
-  createRepositoryPrepareCommand,
   loadPreparedRepository,
   resolveRepositoryCacheDirectory,
   resolveRepositorySpecifier,
@@ -131,24 +130,17 @@ export async function apply(ctx: Context, config: Config = {}): Promise<void> {
   if (new Set(repositories).size !== repositories.length) {
     throw new Error('repository sources must resolve to unique exact specifiers')
   }
-  const prepareCommand = repositories.length === 0 ? undefined : await createRepositoryPrepareCommand()
-  try {
-    const cache = new RepositoryCache(resolveRepositoryCacheDirectory(config.cacheDir), {
-      executableDirectories: prepareCommand === undefined ? [] : [prepareCommand.directory],
-    })
-    await ctx.effect(async function* () {
-      ctx.loader.builtins[REPOSITORY_PLUGIN_BUILTIN] = preparedRuntime
-      yield () => {
-        if (ctx.loader.builtins[REPOSITORY_PLUGIN_BUILTIN] === preparedRuntime) {
-          Reflect.deleteProperty(ctx.loader.builtins, REPOSITORY_PLUGIN_BUILTIN)
-        }
+  const cache = new RepositoryCache(resolveRepositoryCacheDirectory(config.cacheDir))
+  await ctx.effect(async function* () {
+    ctx.loader.builtins[REPOSITORY_PLUGIN_BUILTIN] = preparedRuntime
+    yield () => {
+      if (ctx.loader.builtins[REPOSITORY_PLUGIN_BUILTIN] === preparedRuntime) {
+        Reflect.deleteProperty(ctx.loader.builtins, REPOSITORY_PLUGIN_BUILTIN)
       }
-      for (const repository of repositories) {
-        const plugin = await loadPreparedRepository(ctx, cache, repository)
-        yield plugin.dispose
-      }
-    }, 'repository-plugin runtime and sources')
-  } finally {
-    await prepareCommand?.dispose()
-  }
+    }
+    for (const repository of repositories) {
+      const plugin = await loadPreparedRepository(ctx, cache, repository)
+      yield plugin.dispose
+    }
+  }, 'repository-plugin runtime and sources')
 }

packages/self-modification/repository-plugin/src/source.ts

@@ -3,10 +3,9 @@
  * @module
  */
 
-import { mkdtemp, readFile, rm, writeFile } from 'node:fs/promises'
-import { tmpdir } from 'node:os'
+import { readFile } from 'node:fs/promises'
 import { join, resolve } from 'node:path'
-import { fileURLToPath, pathToFileURL } from 'node:url'
+import { pathToFileURL } from 'node:url'
 import type { Context, Fiber, FiberState, Plugin } from 'cordis'
 import type { RepositoryCache } from '@cordisjs/plugin-loader/repository'
 import { resolveDshHome } from '@deepseek-ai/dsh-paths'
@@ -24,56 +23,6 @@ const FIBER_ACTIVE = 2 as FiberState.ACTIVE
 /** Directory under the Harness home containing immutable repository generations. */
 export const DEFAULT_REPOSITORY_CACHE_DIRECTORY = 'repository-plugins'
 
-/** Temporary host command supplied to repository package lifecycle scripts. */
-export interface RepositoryPrepareCommand {
-  /** Absolute directory to prepend to the isolated install's executable search path. */
-  directory: string
-  /** Remove the temporary command directory. */
-  dispose(): Promise<void>
-}
-
-function shellQuote(value: string): string {
-  return `'${value.replaceAll("'", "'\\''")}'`
-}
-
-function batchQuote(value: string): string {
-  return `"${value.replaceAll('%', '%%')}"`
-}
-
-/**
- * Materialize the DSH-owned prepare executable used only while pnpm packs Git source.
- * @returns a command directory and its idempotent cleanup operation.
- */
-export async function createRepositoryPrepareCommand(): Promise<RepositoryPrepareCommand> {
-  const directory = await mkdtemp(join(tmpdir(), 'dsh-repository-plugin-bin-'))
-  const target = fileURLToPath(new URL('../lib/bin.js', import.meta.url))
-  try {
-    await Promise.all([
-      writeFile(join(directory, REPOSITORY_PLUGIN_PREPARE_COMMAND), [
-        '#!/bin/sh',
-        `exec ${shellQuote(process.execPath)} ${shellQuote(target)} "$@"`,
-        '',
-      ].join('\n'), { mode: 0o700 }),
-      writeFile(join(directory, `${REPOSITORY_PLUGIN_PREPARE_COMMAND}.cmd`), [
-        '@echo off',
-        `${batchQuote(process.execPath)} ${batchQuote(target)} %*`,
-        '',
-      ].join('\r\n'), { mode: 0o700 }),
-    ])
-  } catch (cause) {
-    /* v8 ignore next -- requires a host filesystem failure after mkdtemp; cleanup semantics are the contract under test. */
-    await rm(directory, { recursive: true, force: true })
-    /* v8 ignore next -- preserves that unstageable host failure after best-effort cleanup. */
-    throw cause
-  }
-  return {
-    directory,
-    async dispose() {
-      await rm(directory, { recursive: true, force: true })
-    },
-  }
-}
-
 // The ref segment excludes `#` so `github:o/r#a#b` fails here — at the config
 // parser, with the syntax the error message promises — instead of inside the
 // cache's pnpm install ('misconfiguration fails loud at the earliest