From 5529254501e7e1644c43c970f22697e4b32518e1 Mon Sep 17 00:00:00 2001
From: Pekka Nikander <pekka.nikander@iki.fi>
Date: Wed, 25 Mar 2026 11:18:29 +0200
Subject: [PATCH] fix(action): set LOCKFILE when package-manager is explicitly
 specified (#98)

---
 action.yml | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/action.yml b/action.yml
index 53b574f..c0ce3af 100644
--- a/action.yml
+++ b/action.yml
@@ -56,6 +56,20 @@ runs:
               fi
           fi
           echo "PACKAGE_MANAGER=$PACKAGE_MANAGER" >> $GITHUB_ENV
+          case "$PACKAGE_MANAGER" in
+            yarn) LOCKFILE="yarn.lock" ;;
+            npm)  LOCKFILE="package-lock.json" ;;
+            pnpm) LOCKFILE="pnpm-lock.yaml" ;;
+            bun)  [ -f "bun.lock" ] && LOCKFILE="bun.lock" || LOCKFILE="bun.lockb" ;;
+            deno) LOCKFILE="deno.lock" ;;
+          esac
+          if [ -n "$LOCKFILE" ]; then
+            if [ -f "$LOCKFILE" ]; then
+              echo "LOCKFILE=$LOCKFILE" >> $GITHUB_ENV
+            else
+              echo "::warning title=Lockfile not found::No \`$LOCKFILE\` found; node_modules caching will be skipped."
+            fi
+          fi
         elif [ $(find "." -maxdepth 1 -name "pnpm-lock.yaml") ]; then
             echo "PACKAGE_MANAGER=pnpm" >> $GITHUB_ENV
             echo "LOCKFILE=pnpm-lock.yaml" >> $GITHUB_ENV
@@ -109,14 +123,22 @@ runs:
       with:
         deno-version: ${{ env.VERSION }}
 
-    - name: Setup Node
+    - name: Setup Node (with lockfile cache)
       uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
-      if: ${{ env.PACKAGE_MANAGER != 'bun' && env.PACKAGE_MANAGER != 'deno' }}
+      if: ${{ env.PACKAGE_MANAGER != 'bun' && env.PACKAGE_MANAGER != 'deno' && env.LOCKFILE != '' }}
       with:
         node-version: ${{ inputs.node-version }}
         cache: ${{ env.PACKAGE_MANAGER }}
         cache-dependency-path: "${{ inputs.path }}/${{ env.LOCKFILE }}"
 
+    - name: Setup Node (without lockfile cache)
+      uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
+      if: ${{ env.PACKAGE_MANAGER != 'bun' && env.PACKAGE_MANAGER != 'deno' && env.LOCKFILE == '' }}
+      with:
+        node-version: ${{ inputs.node-version }}
+        cache:
+        package-manager-cache: false
+
     - name: Setup Node (Bun)
       uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
       if: ${{ env.PACKAGE_MANAGER == 'bun' }}