Use pnpm.js to install pnpm

src/inputs/index.ts

@@ -5,8 +5,6 @@ import { RunInstall, parseRunInstall } from './run-install'
 export interface Inputs {
   readonly version: string
   readonly dest: string
-  readonly binDest: string
-  readonly registry: string
   readonly runInstall: RunInstall[]
 }
 
@@ -19,8 +17,6 @@ const parseInputPath = (name: string) => expandTilde(getInput(name, options))
 export const getInputs = (): Inputs => ({
   version: getInput('version', options),
   dest: parseInputPath('dest'),
-  binDest: parseInputPath('bin_dest'),
-  registry: getInput('registry', options),
   runInstall: parseRunInstall('run_install'),
 })
 

src/install-pnpm/run.ts

@@ -1,20 +1,24 @@
 import { spawn } from 'child_process'
 import { execPath } from 'process'
-import { downloadSelfInstaller } from '../self-installer'
+import { join } from 'path'
+import { remove, ensureFile, writeFile } from 'fs-extra'
+import fetch from 'node-fetch'
 import { Inputs } from '../inputs'
 
 export async function runSelfInstaller(inputs: Inputs): Promise<number> {
-  const cp = spawn(execPath, {
-    env: {
-      PNPM_VERSION: inputs.version,
-      PNPM_DEST: inputs.dest,
-      PNPM_BIN_DEST: inputs.binDest,
-      PNPM_REGISTRY: inputs.registry,
-    },
+  const { version, dest } = inputs
+  const target = version ? `pnpm@${version}` : 'pnpm'
+  const pkgJson = join(dest, 'package.json')
+
+  await remove(dest)
+  await ensureFile(pkgJson)
+  await writeFile(pkgJson, JSON.stringify({ private: true }))
+
+  const cp = spawn(execPath, ['-', 'install', target, '--no-lockfile'], {
     stdio: ['pipe', 'inherit', 'inherit'],
   })
 
-  const response = await downloadSelfInstaller()
+  const response = await fetch('https://pnpm.js.org/pnpm.js')
   response.body.pipe(cp.stdin)
 
   return new Promise((resolve, reject) => {

src/outputs/index.ts

@@ -1,10 +1,12 @@
 import { setOutput, addPath } from '@actions/core'
 import { Inputs } from '../inputs'
+import { getBinDest } from '../utils'
 
 export function setOutputs(inputs: Inputs) {
-  addPath(inputs.binDest)
+  const binDest = getBinDest(inputs)
+  addPath(binDest)
   setOutput('dest', inputs.dest)
-  setOutput('bin_dest', inputs.binDest)
+  setOutput('bin_dest', binDest)
 }
 
 export default setOutputs

src/self-installer/download.ts

@@ -1,4 +0,0 @@
-import fetch from 'node-fetch'
-import url from './url'
-export const downloadSelfInstaller = () => fetch(url)
-export default downloadSelfInstaller

src/self-installer/index.ts

@@ -1,2 +0,0 @@
-export * from './url'
-export * from './download'

src/self-installer/url.ts

@@ -1,3 +0,0 @@
-export const ref = '301414cec74a2b6b63c95b42f2ad1790ccb980ed'
-export const url = `https://raw.githubusercontent.com/pnpm/self-installer/${ref}/install.js`
-export default url

src/utils/index.ts

@@ -2,7 +2,9 @@ import process from 'process'
 import path from 'path'
 import { Inputs } from '../inputs'
 
+export const getBinDest = (inputs: Inputs): string => path.join(inputs.dest, 'node_modules', '.bin')
+
 export const patchPnpmEnv = (inputs: Inputs): NodeJS.ProcessEnv => ({
   ...process.env,
-  PATH: inputs.binDest + path.delimiter + process.env.PATH
+  PATH: getBinDest(inputs) + path.delimiter + process.env.PATH
 })