From 1fe9179886058abf320d4bc3e6c5bbfbe786b94b Mon Sep 17 00:00:00 2001
From: "Paulo F. Oliveira" <paulo.ferraz.oliveira@gmail.com>
Date: Thu, 3 Jul 2025 17:35:06 +0100
Subject: [PATCH] Handle `.tool-versions`' line break on Windows (#357)

* Test .tool-version on top of Windows

* Parse .tool-version with Windows-style line endings
---
 .github/workflows/action.yml |  8 ++++++++
 dist/index.js                |  2 +-
 src/setup-beam.js            |  2 +-
 test/setup-beam.test.js      | 14 +++++++++-----
 4 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/.github/workflows/action.yml b/.github/workflows/action.yml
index 3b13952..86748e5 100644
--- a/.github/workflows/action.yml
+++ b/.github/workflows/action.yml
@@ -90,6 +90,14 @@ jobs:
           node-version: '20'
       - run: npm install --production
       - run: npm test
+      - name: .tool-versions test
+        id: setup-beam
+        uses: ./
+        with:
+          install-rebar: false
+          install-hex: false
+          version-file: test/.tool-versions
+          version-type: strict
 
   unit_tests_macos:
     name: Unit tests (macOS)
diff --git a/dist/index.js b/dist/index.js
index 34ce9c0..5c11ebc 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -26680,7 +26680,7 @@ function parseVersionFile(versionFilePath0) {
   // For the time being we parse .tool-versions
   // If we ever start parsing something else, this should
   // become default in a new option named e.g. version-file-type
-  versions.split('\n').forEach((line) => {
+  versions.split(/\r?\n/).forEach((line) => {
     const appVersion = line.match(/^([^ ]+)[ ]+(ref:v?)?([^ #]+)/)
     if (appVersion) {
       const app = appVersion[1]
diff --git a/src/setup-beam.js b/src/setup-beam.js
index a8214c3..fdb8d4b 100644
--- a/src/setup-beam.js
+++ b/src/setup-beam.js
@@ -805,7 +805,7 @@ function parseVersionFile(versionFilePath0) {
   // For the time being we parse .tool-versions
   // If we ever start parsing something else, this should
   // become default in a new option named e.g. version-file-type
-  versions.split('\n').forEach((line) => {
+  versions.split(/\r?\n/).forEach((line) => {
     const appVersion = line.match(/^([^ ]+)[ ]+(ref:v?)?([^ #]+)/)
     if (appVersion) {
       const app = appVersion[1]
diff --git a/test/setup-beam.test.js b/test/setup-beam.test.js
index 89b3daa..ac0733b 100644
--- a/test/setup-beam.test.js
+++ b/test/setup-beam.test.js
@@ -938,15 +938,19 @@ describe('version file', () => {
   const gleamVersion = unsimulateInput('gleam-version')
 
   it('is parsed correctly', async () => {
-    const erlang = '27'
-    const elixir = '1.17.0'
-    const gleam = '0.23.0'
-    const toolVersions = `# a comment
-erlang   ref:v${erlang}# comment, no space, and ref:v
+    const erlang = '27.3.4.1'
+    const elixir = '1.18.4'
+    const gleam = '1.9.1'
+    let toolVersions = `# a comment
+erlang   ref:v${erlang}
 elixir ref:${elixir}  # comment, with space and ref:
  not-gleam 0.23 # not picked up
 gleam ${gleam} \n`
     const filename = 'test/.tool-versions'
+    if (process.platform === 'win32') {
+      // Force \r\n to test in Windows
+      toolVersions = toolVersions.replace(/\n/g, '\r\n')
+    }
     fs.writeFileSync(filename, toolVersions)
     process.env.GITHUB_WORKSPACE = ''
     const appVersions = setupBeam.parseVersionFile(filename)