From c5d8eb9b264eedf78d8a9e51469b9ed4f6d65e0b Mon Sep 17 00:00:00 2001
From: James Garbutt <43081j@users.noreply.github.com>
Date: Fri, 26 Sep 2025 09:34:39 +0100
Subject: [PATCH] feat: cache main branch

---
 .github/workflows/diff-dependencies.yml | 13 +++++++++++++
 README.md                               |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/diff-dependencies.yml b/.github/workflows/diff-dependencies.yml
index ef7f6d6..d9e5a6a 100644
--- a/.github/workflows/diff-dependencies.yml
+++ b/.github/workflows/diff-dependencies.yml
@@ -11,15 +11,28 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           ref: main
+      - name: Get main commit SHA
+        id: main-sha
+        run: echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+      - name: Check cache for main build
+        id: cache-main
+        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        with:
+          path: '*.tgz'
+          key: main-build-${{ steps.main-sha.outputs.sha }}
       - name: Use Node
+        if: steps.cache-main.outputs.cache-hit != 'true'
         uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
         with:
           node-version: 24.x
       - name: Install Dependencies
+        if: steps.cache-main.outputs.cache-hit != 'true'
         run: npm ci --ignore-scripts
       - name: Build
+        if: steps.cache-main.outputs.cache-hit != 'true'
         run: npm run build
       - name: Pack
+        if: steps.cache-main.outputs.cache-hit != 'true'
         run: npm pack
       - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
diff --git a/README.md b/README.md
index 26535bd..fc6d3f2 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# @e18e/action-dependency-diff
+# e18e/action-dependency-diff
 
 > A GitHub action for reporting differences in dependencies between two branches or commits.