alpine: allow node20 for actions/cache@v4

Author: jpnurmi

.github/alpine/setup-node.sh

@@ -1,12 +1,12 @@
 #!/bin/sh
 
-[ -n "$1" ] || { echo "Usage: $0 <path>"; exit 1; }
-
 # A workaround for "JavaScript Actions in Alpine containers are only supported on x64 Linux runners."
 # https://github.com/actions/runner/blob/8a9b96806d12343f7d123c669e29c629138023dd/src/Runner.Worker/Handlers/StepHost.cs#L283-L290
 if [ "$(uname -m)" != "x86_64" ]; then
-    mkdir -p $1
-    ln -s /usr/bin/node $1
-    ln -s /usr/bin/npm $1
+    for node in /__e/node*; do
+        mkdir -p $node/bin
+        ln -s /usr/bin/node $node/bin/node
+        ln -s /usr/bin/npm $node/bin/npm
+    done
     sed -i 's/ID=alpine/ID=unknown/' /usr/lib/os-release
 fi

.github/workflows/build.yml

@@ -32,6 +32,7 @@ jobs:
             container:
               image: ghcr.io/getsentry/sentry-dotnet-alpine:3.21
               volumes:
+                - /tmp/node20:/__e/node20
                 - /tmp/node24:/__e/node24
           - os: macos-15 # Pin macos to get the version of Xcode that we need: https://github.com/actions/runner-images/issues/10703
             rid: macos # universal (osx-arm64 + osx-x64)
@@ -44,7 +45,7 @@ jobs:
       - name: Initialize Alpine Linux
         if: ${{ contains(matrix.container.image, 'alpine') }}
         run: |
-          curl -sSL https://raw.githubusercontent.com/${{ github.repository }}/${{ github.sha }}/.github/alpine/setup-node.sh | sudo bash /dev/stdin /__e/node24/bin/
+          curl -sSL https://raw.githubusercontent.com/${{ github.repository }}/${{ github.sha }}/.github/alpine/setup-node.sh | sudo bash /dev/stdin
 
       - name: Checkout
         uses: actions/checkout@v5
@@ -100,6 +101,7 @@ jobs:
             container:
               image: ghcr.io/getsentry/sentry-dotnet-alpine:3.21
               volumes:
+                - /tmp/node20:/__e/node20
                 - /tmp/node24:/__e/node24
                 - /var/run/docker.sock:/var/run/docker.sock
           - os: macos-15 # Pin macos to get the version of Xcode that we need: https://github.com/actions/runner-images/issues/10703
@@ -116,7 +118,7 @@ jobs:
       - name: Initialize Alpine Linux
         if: ${{ contains(matrix.container.image, 'alpine') }}
         run: |
-          curl -sSL https://raw.githubusercontent.com/${{ github.repository }}/${{ github.sha }}/.github/alpine/setup-node.sh | sudo bash /dev/stdin /__e/node24/bin/
+          curl -sSL https://raw.githubusercontent.com/${{ github.repository }}/${{ github.sha }}/.github/alpine/setup-node.sh | sudo bash /dev/stdin
 
       - name: Cancel Previous Runs
         if: github.ref_name != 'main' && !startsWith(github.ref_name, 'release/')