fix: more lightweight npm bin discovery in windows (#7271)

This will stop npm having to load twice on every windows invocation

Author: wraithgar

bin/npm

@@ -41,8 +41,9 @@ if [ $? -ne 0 ]; then
   fi
   no_node_dir
 fi
+NPM_PREFIX_JS="$CLI_BASEDIR/node_modules/npm/bin/npm-prefix.js"
 NPM_CLI_JS="$CLI_BASEDIR/node_modules/npm/bin/npm-cli.js"
-NPM_PREFIX=`"$NODE_EXE" "$NPM_CLI_JS" prefix -g`
+NPM_PREFIX=`"$NODE_EXE" "$NPM_PREFIX_JS"`
 if [ $? -ne 0 ]; then
   no_node_dir
 fi

bin/npm-prefix.js

@@ -0,0 +1,30 @@
+#!/usr/bin/env node
+// This is a single-use bin to help windows discover the proper prefix for npm
+// without having to load all of npm first
+// It does not accept argv params
+
+const path = require('path')
+const Config = require('@npmcli/config')
+const { definitions, flatten, shorthands } = require('@npmcli/config/lib/definitions')
+const config = new Config({
+  npmPath: path.dirname(__dirname),
+  // argv is explicitly not looked at since prefix is not something that can be changed via argv
+  argv: [],
+  definitions,
+  flatten,
+  shorthands,
+  excludeNpmCwd: false,
+})
+
+async function main () {
+  try {
+    await config.load()
+    // eslint-disable-next-line no-console
+    console.log(config.globalPrefix)
+  } catch (err) {
+    // eslint-disable-next-line no-console
+    console.error(err)
+    process.exit(1)
+  }
+}
+main()

bin/npm.cmd

@@ -8,8 +8,9 @@ IF NOT EXIST "%NODE_EXE%" (
   SET "NODE_EXE=node"
 )
 
+SET "NPM_PREFIX_JS=%~dp0\node_modules\npm\bin\npm-prefix.js"
 SET "NPM_CLI_JS=%~dp0\node_modules\npm\bin\npm-cli.js"
-FOR /F "delims=" %%F IN ('CALL "%NODE_EXE%" "%NPM_CLI_JS%" prefix -g') DO (
+FOR /F "delims=" %%F IN ('CALL "%NODE_EXE%" "%NPM_PREFIX_JS%"') DO (
   SET "NPM_PREFIX_NPM_CLI_JS=%%F\node_modules\npm\bin\npm-cli.js"
 )
 IF EXIST "%NPM_PREFIX_NPM_CLI_JS%" (

bin/npm.ps1

@@ -17,8 +17,8 @@ if ($nodebin -eq $null) {
 }
 $nodedir = $(New-Object -ComObject Scripting.FileSystemObject).GetFile("$nodebin").ParentFolder.Path
 
-$npmclijs="$nodedir/node_modules/npm/bin/npm-cli.js"
-$npmprefix=(& $nodeexe $npmclijs prefix -g)
+$npmprefixjs="$nodedir/node_modules/npm/bin/npm-prefix.js"
+$npmprefix=(& $nodeexe $npmprefixjs)
 if ($LASTEXITCODE -ne 0) {
   Write-Host "Could not determine Node.js install directory"
   exit 1

bin/npx

@@ -41,9 +41,9 @@ if [ $? -ne 0 ]; then
   fi
   no_node_dir
 fi
-NPM_CLI_JS="$CLI_BASEDIR/node_modules/npm/bin/npm-cli.js"
+NPM_PREFIX_JS="$CLI_BASEDIR/node_modules/npm/bin/npm-prefix.js"
 NPX_CLI_JS="$CLI_BASEDIR/node_modules/npm/bin/npx-cli.js"
-NPM_PREFIX=`"$NODE_EXE" "$NPM_CLI_JS" prefix -g`
+NPM_PREFIX=`"$NODE_EXE" "$NPM_PREFIX_JS"`
 if [ $? -ne 0 ]; then
   no_node_dir
 fi

bin/npx.cmd

@@ -8,9 +8,9 @@ IF NOT EXIST "%NODE_EXE%" (
   SET "NODE_EXE=node"
 )
 
-SET "NPM_CLI_JS=%~dp0\node_modules\npm\bin\npm-cli.js"
+SET "NPM_PREFIX_JS=%~dp0\node_modules\npm\bin\npm-prefix.js"
 SET "NPX_CLI_JS=%~dp0\node_modules\npm\bin\npx-cli.js"
-FOR /F "delims=" %%F IN ('CALL "%NODE_EXE%" "%NPM_CLI_JS%" prefix -g') DO (
+FOR /F "delims=" %%F IN ('CALL "%NODE_EXE%" "%NPM_PREFIX_JS%"') DO (
   SET "NPM_PREFIX_NPX_CLI_JS=%%F\node_modules\npm\bin\npx-cli.js"
 )
 IF EXIST "%NPM_PREFIX_NPX_CLI_JS%" (

bin/npx.ps1

@@ -17,8 +17,8 @@ if ($nodebin -eq $null) {
 }
 $nodedir = $(New-Object -ComObject Scripting.FileSystemObject).GetFile("$nodebin").ParentFolder.Path
 
-$npmclijs="$nodedir/node_modules/npm/bin/npm-cli.js"
-$npmprefix=(& $nodeexe $npmclijs prefix -g)
+$npmprefixjs="$nodedir/node_modules/npm/bin/npm-prefix.js"
+$npmprefix=(& $nodeexe $npmprefixjs)
 if ($LASTEXITCODE -ne 0) {
   Write-Host "Could not determine Node.js install directory"
   exit 1

test/bin/windows-shims.js

@@ -44,23 +44,21 @@ t.test('shim contents', t => {
 
   t.test('bash', t => {
     const { diff, letters } = diffFiles(SHIMS.npm, SHIMS.npx)
-    t.match(diff[0].split('\n').reverse().join(''), /^NPX_CLI_JS=/, 'has NPX_CLI')
-    t.equal(diff.length, 1)
+    t.strictSame(diff, [])
     t.strictSame([...letters], ['M', 'X'], 'all other changes are m->x')
     t.end()
   })
 
   t.test('cmd', t => {
     const { diff, letters } = diffFiles(SHIMS['npm.cmd'], SHIMS['npx.cmd'])
-    t.match(diff[0], /^SET "NPX_CLI_JS=/, 'has NPX_CLI')
-    t.equal(diff.length, 1)
+    t.strictSame(diff, [])
     t.strictSame([...letters], ['M', 'X'], 'all other changes are m->x')
     t.end()
   })
 
   t.test('pwsh', t => {
     const { diff, letters } = diffFiles(SHIMS['npm.ps1'], SHIMS['npx.ps1'])
-    t.equal(diff.length, 0)
+    t.strictSame(diff, [])
     t.strictSame([...letters], ['M', 'X'], 'all other changes are m->x')
     t.end()
   })
@@ -96,13 +94,12 @@ t.test('run shims', t => {
     node_modules: {
       npm: {
         bin: {
-          'npx-cli.js': `throw new Error('this should not be called')`,
-          'npm-cli.js': `
-            const assert = require('assert')
+          'npm-prefix.js': `
             const { resolve } = require('path')
-            assert.equal(process.argv.slice(2).join(' '), 'prefix -g')
             console.log(resolve(__dirname, '../../../global-prefix'))
           `,
+          'npx-cli.js': `throw new Error('local npx should not be called')`,
+          'npm-cli.js': `throw new Error('local npm should not be called')`,
         },
       },
     },