From 41ff72655975bd51cab0327fa583b6e92b6d3061 Mon Sep 17 00:00:00 2001
From: Adrian Riedel <Eynorey@users.noreply.github.com>
Date: Wed, 8 Oct 2025 01:48:14 -0700
Subject: [PATCH] feat: support installation from custom NPM registry (#179)

copy .npmrc from GitHub workspace if it exists so that PNPM respects custom
registry configurations when self-installing
---
 dist/index.js           | Bin 271300 -> 271535 bytes
 src/install-pnpm/run.ts |  13 ++++++++++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/dist/index.js b/dist/index.js
index ce27906534c7ad63b4f7052966c4eefffb741433..425614add2445a8d0b2ac242b37b7d1ae4e14bac 100644
GIT binary patch
delta 295
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z;EQBToBWB-97t;MD+XnzX{2aYmlRc2CzdB>mS`C0<m)Bp7gV}s=A>$BB<rQ5rX`l<
zl;~yUXXa_7=qTys733BrD{1PWNfpDTCchGlVFx=#p<r?lzYAl=<mvn#j0KY)@VmI=
z+Jdc7$V)9(2q?<W%`8sU(9lTLDbcjGtIp8N&(ly!Eh@?{QUZ!tL-@%#`NgS9I;onq
znwr)?=jKk%5GY{G-F#D^mr=O5B(bQZI6Si?Lqn+m=rji<&E_Pb_9P)jAZ7w$=Iu#B
HEJ=a@9?)bx

delta 127
zcmZ2~QsBsOfekbHChzBqU@V<1!EX*E1Nar$lk@Y6OB7Njs|mO;rcKTk@L)`tyamWE
znEX>fMm<e0KTks`wWuh+NJ*ze(;C80&dD!MRnke-tku-C&P>xNm~10hz*w+(tza)>
WbD(g0pfDp4GXXL4_CR5lI6(lW<R}yX

diff --git a/src/install-pnpm/run.ts b/src/install-pnpm/run.ts
index 26eb44b..f5b3ae0 100644
--- a/src/install-pnpm/run.ts
+++ b/src/install-pnpm/run.ts
@@ -1,6 +1,6 @@
 import { addPath, exportVariable } from '@actions/core'
 import { spawn } from 'child_process'
-import { rm, writeFile, mkdir } from 'fs/promises'
+import { rm, writeFile, mkdir, copyFile } from 'fs/promises'
 import { readFileSync } from 'fs'
 import path from 'path'
 import { execPath } from 'process'
@@ -10,6 +10,7 @@ import YAML from 'yaml'
 
 export async function runSelfInstaller(inputs: Inputs): Promise<number> {
   const { version, dest, packageJsonFile, standalone } = inputs
+  const { GITHUB_WORKSPACE } = process.env
 
   // prepare self install
   await rm(dest, { recursive: true, force: true })
@@ -19,6 +20,16 @@ export async function runSelfInstaller(inputs: Inputs): Promise<number> {
   // we have ensured the dest directory exists, we can write the file directly
   await writeFile(pkgJson, JSON.stringify({ private: true }))
 
+  // copy .npmrc if it exists to install from custom registry
+  if (GITHUB_WORKSPACE) {
+    try {
+      await copyFile(path.join(GITHUB_WORKSPACE, '.npmrc'), path.join(dest, '.npmrc'))
+    } catch (error) {
+      // Swallow error if .npmrc doesn't exist
+      if (!util.types.isNativeError(error) || !('code' in error) || error.code !== 'ENOENT') throw error
+    }
+  }
+
   // prepare target pnpm
   const target = await readTarget({ version, packageJsonFile, standalone })
   const cp = spawn(execPath, [path.join(__dirname, 'pnpm.cjs'), 'install', target, '--no-lockfile'], {