From 8f49604b9745e32ba795ddea6c42180dd804dace Mon Sep 17 00:00:00 2001
From: Hammond95 <martin.deluca@sysdig.com>
Date: Tue, 20 Jan 2026 14:56:06 +0100
Subject: [PATCH] shared cache feat

---
 README.md  | 4 ++--
 action.yml | 8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 2a30ad0..2c97052 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
-    - uses: actions/setup-python@v3
+    - uses: actions/checkout@v6
+    - uses: actions/setup-python@v6
     - uses: pre-commit/action@v3.0.1
 ```
 
diff --git a/action.yml b/action.yml
index 18ded0d..e56a9ce 100644
--- a/action.yml
+++ b/action.yml
@@ -5,6 +5,10 @@ inputs:
     description: options to pass to pre-commit run
     required: false
     default: '--all-files'
+  shared-cache:
+    description: enable shared cache across branches
+    required: false
+    default: 'false'
 runs:
   using: composite
   steps:
@@ -15,6 +19,10 @@ runs:
   - uses: actions/cache@v4
     with:
       path: ~/.cache/pre-commit
+      # Key matches pre-commit action format: pre-commit-3|pythonLocation|configHash
+      # The restore-key will find caches from ANY branch with the same Python location and config hash
+      # This allows sharing caches across branches when .pre-commit-config.yaml hasn't changed
       key: pre-commit-3|${{ env.pythonLocation }}|${{ hashFiles('.pre-commit-config.yaml') }}
+      restore-keys: ${{ inputs.shared-cache == 'true' && format('pre-commit-3|{0}|{1}', env.pythonLocation, hashFiles('.pre-commit-config.yaml')) || '' }}
   - run: pre-commit run --show-diff-on-failure --color=always ${{ inputs.extra_args }}
     shell: bash