Split job to avoid tainting workspace

Author: p3lim

.github/workflows/ipxe_version.yaml

@@ -6,27 +6,32 @@ on:
   workflow_dispatch:
 
 jobs:
-  ipxe_version:
+  get-version:
     runs-on: ubuntu-latest
+    outputs:
+      sha: ${{ steps.version.outputs.sha }}
+      sha-short: ${{ steps.version.outputs.sha-short }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
-
       - name: Checkout iPXE from master
         uses: actions/checkout@v3
         with:
-          path: ${{ env.RUNNER_TEMP }}/ipxe
           repository: ipxe/ipxe
 
       - name: Get version
         uses: ./.github/actions/version
-        with:
-          path: ${{ env.RUNNER_TEMP }}/ipxe
         id: version
 
+  update-version:
+    runs-on: ubuntu-latest
+    needs:
+      - get-version
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
       - name: Update version string
         run: |
-          sed -Ei 's/(IPXE_REF: )[0-9a-f]{40}/\1${{ steps.version.outputs.sha }}/' .github/workflows/ipxe_build.yaml
+          sed -Ei 's/(IPXE_REF: )[0-9a-f]{40}/\1${{ needs.get-version.outputs.sha }}/' .github/workflows/ipxe_build.yaml
 
       - name: Check dirty status
         id: dirty
@@ -42,9 +47,9 @@ jobs:
         if: steps.dirty.outputs.dirty == 'true'
         uses: peter-evans/create-pull-request@v4
         with:
-          title: ':arrow_up: Bump ipxe/ipxe to ${{ steps.version.outputs.sha-short }}'
-          body: 'https://github.com/ipxe/ipxe/commits/${{ steps.version.outputs.sha }}'
-          commit-message: ':arrow_up: Bump ipxe/ipxe to ${{ steps.version.outputs.sha-short }}'
+          title: ':arrow_up: Bump ipxe/ipxe to ${{ needs.get-version.outputs.sha-short }}'
+          body: 'https://github.com/ipxe/ipxe/commits/${{ needs.get-version.outputs.sha }}'
+          commit-message: ':arrow_up: Bump ipxe/ipxe to ${{ needs.get-version.outputs.sha-short }}'
           labels: dependencies
           branch: ipxe-version
           delete-branch: true