Update GitHub actions upload/download artifact (major)

.github/workflows/build-docker-monorepo.yml

@@ -135,7 +135,7 @@ jobs:
           touch "$TEMP/digests/${DIGEST#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-${{ matrix.platform }}
           path: ${{ runner.temp }}/digests/*
@@ -153,7 +153,7 @@ jobs:
 
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*

.github/workflows/build-docker.yml

@@ -136,7 +136,7 @@ jobs:
           touch "$TEMP/digests/${DIGEST#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-${{ matrix.platform }}
           path: ${{ runner.temp }}/digests/*
@@ -154,7 +154,7 @@ jobs:
 
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*

.github/workflows/build.yml

@@ -146,26 +146,39 @@ jobs:
       # This is the official workaround: https://github.com/actions/upload-artifact#maintaining-file-permissions-and-case-sensitive-files
       # It'll also make it faster to upload and download though, so maybe it's a win anyway.
       - name: Create archive
-        run: tar --owner=0 --group=0 --xz -cvvf build.tar.xz -C "$BUILD_BASE" --transform 's,^\.,build,' .
+        run: |
+          tar --owner=0 --group=0 --xz -cvvf jetpack-build.tar.xz -C "$BUILD_BASE" --transform 's,^\.,build,' .
+          # For Store build as artifact (old)
+          ln jetpack-build.tar.xz build.tar.xz
 
-      - name: Store build as artifact
-        uses: actions/upload-artifact@v6
+      # 2026-03-02: Temporarily upload the artifact twice, under both old and new names, as we update things using the old name.
+      - name: Store build as artifact (old)
+        uses: actions/upload-artifact@v7
         with:
           name: jetpack-build
           path: build.tar.xz
           # Retain trunk builds for 7 days so we can manually download for branch comparisons. Branch builds only need one day so the beta builder can slurp it up to distribute.
           retention-days: ${{ case( github.ref == 'refs/heads/trunk', 7, 1 ) }}
           # Already compressed.
           compression-level: 0
+      - name: Store build as artifact (new)
+        uses: actions/upload-artifact@v7
+        with:
+          path: jetpack-build.tar.xz
+          # Retain trunk builds for 7 days so we can manually download for branch comparisons. Branch builds only need one day so the beta builder can slurp it up to distribute.
+          retention-days: ${{ case( github.ref == 'refs/heads/trunk', 7, 1 ) }}
+          # Already compressed.
+          compression-level: 0
+          archive: false
 
       - name: Store plugins.tsv as artifact
         if: steps.plugins.outputs.any == 'true'
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
-          name: plugins.tsv
           path: ${{ env.BUILD_BASE }}/plugins.tsv
           # We don't really care about this artifact, its presence is a flag to the post-build job.
           retention-days: 1
+          archive: false
 
       - name: Update reminder with testing instructions
         id: update-reminder-comment
@@ -191,11 +204,11 @@ jobs:
           path: monorepo
 
       - name: Download build artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
-          name: jetpack-build
+          name: jetpack-build.tar.xz
       - name: Extract build archive
-        run: tar --xz -xvvf build.tar.xz build
+        run: tar --xz -xvvf jetpack-build.tar.xz build
 
       - name: Prepare plugin zips
         id: prepare
@@ -257,7 +270,7 @@ jobs:
           echo "any-built=$ANY_BUILT" >> "$GITHUB_OUTPUT"
 
       - name: Create plugins artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         if: steps.prepare.outputs.any-built == 'true'
         with:
           name: plugins
@@ -288,12 +301,12 @@ jobs:
         timeout-minutes: 1  # 2025-11-06: Successful runs seem to take a few seconds
 
       - name: Download build artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
-          name: jetpack-build
+          name: jetpack-build.tar.xz
         timeout-minutes: 2  # 2025-11-06: Successful runs normally take a few seconds
       - name: Extract build archive
-        run: tar --xz -xvvf build.tar.xz build
+        run: tar --xz -xvvf jetpack-build.tar.xz build
         timeout-minutes: 1  # 2025-11-06: Successful runs seem to take a few seconds
 
       - name: Wait for prior instances of the workflow to finish

.github/workflows/e2e-tests.yml

@@ -96,6 +96,7 @@ jobs:
           COMPOSER_ROOT_VERSION: "dev-trunk"
           BUILD_DIR: ./build-output
           PROJECT_PATH: ${{ matrix.path }}
+          BUILD_GROUP: ${{ matrix.buildGroup }}
         run: |
           find . -path ./.github -prune -o -type f -print | sort > /tmp/before.txt
           find . -path ./.github -prune -o -type l -print | sort > /tmp/beforel.txt
@@ -130,17 +131,17 @@ jobs:
           echo "::endgroup::"
 
           echo "::group::Creating artifact"
-          sed 's!^!./!' /tmp/changed.txt /tmp/changedl.txt | tar -cvvf build-cache.tar.xz --verbatim-files-from --files-from=-
+          sed 's!^!./!' /tmp/changed.txt /tmp/changedl.txt | tar -cvvf "$BUILD_GROUP.tar.xz" --verbatim-files-from --files-from=-
           echo "::endgroup::"
 
       - name: Save ${{ matrix.buildGroup }} build cache
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
-          name: ${{ matrix.buildGroup }}
-          path: build-cache.tar.xz
+          path: ${{ matrix.buildGroup }}.tar.xz
           retention-days: 1
           # Already compressed.
           compression-level: 0
+          archive: false
 
   e2e-tests:
     name: "${{ matrix.project }} e2e tests"
@@ -162,14 +163,16 @@ jobs:
       - uses: actions/checkout@v6
 
       - name: Restore ${{ matrix.buildGroup }} build cache
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         if: needs.build-projects.result == 'success' && ! startsWith( matrix.suite, 'atomic' )
         with:
-          name: ${{ matrix.buildGroup }}
+          name: ${{ matrix.buildGroup }}.tar.xz
       - name: Extract ${{ matrix.buildGroup }} build cache
         if: needs.build-projects.result == 'success' && ! startsWith( matrix.suite, 'atomic' )
+        env:
+          BUILD_GROUP: ${{ matrix.buildGroup }}
         run: |
-          tar -xvvf build-cache.tar.xz .
+          tar -xvvf "$BUILD_GROUP.tar.xz" .
 
       - name: Setup tools
         uses: ./.github/actions/tool-setup
@@ -314,7 +317,7 @@ jobs:
       - name: Upload test artifacts
         if: ${{ always() }}
         continue-on-error: true
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-output-${{ matrix.project }}
           path: ${{ matrix.path }}/output
@@ -398,7 +401,7 @@ jobs:
         working-directory: ./projects/github-actions/test-results-to-slack
 
       - name: Download test artifacts
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           path: test-output
 

.github/workflows/post-build.yml

@@ -125,7 +125,8 @@ jobs:
     if: github.event.workflow_run.conclusion == 'success'
     timeout-minutes: 2  # 2025-11-20: Takes a few seconds.
     outputs:
-      zip_url: ${{ steps.run.outputs.zip_url }}
+      artifact_name: ${{ steps.run.outputs.artifact_name }}
+      artifact_filename: ${{ steps.run.outputs.artifact_filename }}
       any_plugins: ${{ steps.run.outputs.any_plugins }}
     steps:
       - uses: actions/checkout@v6
@@ -136,6 +137,8 @@ jobs:
           TOKEN: ${{ github.token }}
           URL: ${{ github.event.workflow_run.artifacts_url }}
         run: |
+          ARTIFACT_NAME=
+          ARTIFACT_FILENAME=
           for (( i=1; i<=5; i++ )); do
             [[ $i -gt 1 ]] && sleep 10
             echo "::group::Fetch list of artifacts (attempt $i/5)"
@@ -145,15 +148,25 @@ jobs:
             )"
             echo "$JSON"
             echo "::endgroup::"
-            ZIPURL="$(jq -r '.artifacts | map( select( .name == "jetpack-build" ) ) | sort_by( .created_at ) | last | .archive_download_url // empty' <<<"$JSON")"
+
             PLUGINS="$(jq -r '.artifacts[] | select( .name == "plugins.tsv" )' <<<"$JSON")"
-            if [[ -n "$ZIPURL" ]]; then
+
+            # 2026-03-02: Temporarily look for both old and new artifacts.
+            if jq -e '.artifacts | map( select( .name == "jetpack-build.tar.xz" ) )' <<<"$JSON" &>/dev/null; then
+              ARTIFACT_NAME=jetpack-build.tar.xz
+              ARTIFACT_FILENAME=jetpack-build.tar.xz
+              break
+            fi
+            if jq -e '.artifacts | map( select( .name == "jetpack-build" ) )' <<<"$JSON" &>/dev/null; then
+              ARTIFACT_NAME=jetpack-build
+              ARTIFACT_FILENAME=build.tar.xz
               break
             fi
           done
-          [[ -z "$ZIPURL" ]] && { echo "::error::Failed to find artifact."; exit 1; }
-          echo "Zip URL: $ZIPURL"
-          echo "zip_url=${ZIPURL}" >> "$GITHUB_OUTPUT"
+          [[ -z "$ARTIFACT_NAME" ]] && { echo "::error::Failed to find artifact."; exit 1; }
+          echo "Artifact name: $ARTIFACT_NAME"
+          echo "artifact_name=${ARTIFACT_NAME}" >> "$GITHUB_OUTPUT"
+          echo "artifact_filename=${ARTIFACT_FILENAME}" >> "$GITHUB_OUTPUT"
           if [[ -z "$PLUGINS" ]]; then
             echo "Any plugins? No"
             echo "any_plugins=false" >> "$GITHUB_OUTPUT"
@@ -269,26 +282,17 @@ jobs:
           token: ${{ steps.get_token.outputs.token }}
 
       - name: Download build artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: ${{ needs.find_artifact.outputs.artifact_name }}
+          github-token: ${{ github.token }}
+          run-id: ${{ github.event.workflow_run.id }}
+
+      - name: Extract build artifact
         env:
-          TOKEN: ${{ github.token }}
-          ZIPURL: ${{ needs.find_artifact.outputs.zip_url }}
+          ARTIFACT_FILENAME: ${{ needs.find_artifact.outputs.artifact_filename }}
         shell: bash
-        run: |
-          for (( i=1; i<=2; i++ )); do
-            [[ $i -gt 1 ]] && sleep 10
-            echo "::group::Downloading artifact (attempt $i/2)"
-            curl -v -L --get \
-              --header "Authorization: token $TOKEN" \
-              --url "$ZIPURL" \
-              --output "artifact.zip"
-            echo "::endgroup::"
-            if [[ -e "artifact.zip" ]] && zipinfo artifact.zip &>/dev/null; then
-              break
-            fi
-          done
-          [[ ! -e "artifact.zip" ]] && { echo "::error::Failed to download artifact."; exit 1; }
-          unzip artifact.zip
-          tar --xz -xvvf build.tar.xz build/plugins.tsv
+        run: tar --xz -xvvf "$ARTIFACT_FILENAME" build/plugins.tsv
 
       - name: Prepare matrix
         id: matrix
@@ -345,26 +349,17 @@ jobs:
           path: commit
 
       - name: Download build artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: ${{ needs.find_artifact.outputs.artifact_name }}
+          github-token: ${{ github.token }}
+          run-id: ${{ github.event.workflow_run.id }}
+
+      - name: Extract build artifact
         env:
-          TOKEN: ${{ github.token }}
-          ZIPURL: ${{ needs.find_artifact.outputs.zip_url }}
+          ARTIFACT_FILENAME: ${{ needs.find_artifact.outputs.artifact_filename }}
         shell: bash
-        run: |
-          for (( i=1; i<=2; i++ )); do
-            [[ $i -gt 1 ]] && sleep 10
-            echo "::group::Downloading artifact (attempt $i/2)"
-            curl -v -L --get \
-              --header "Authorization: token $TOKEN" \
-              --url "$ZIPURL" \
-              --output "artifact.zip"
-            echo "::endgroup::"
-            if [[ -e "artifact.zip" ]] && zipinfo artifact.zip &>/dev/null; then
-              break
-            fi
-          done
-          [[ ! -e "artifact.zip" ]] && { echo "::error::Failed to download artifact."; exit 1; }
-          unzip artifact.zip
-          tar --xz -xvvf build.tar.xz build
+        run: tar --xz -xvvf "$ARTIFACT_FILENAME" build
 
       - name: Setup WordPress
         run: trunk/.github/files/test-plugin-update/setup.sh
@@ -442,26 +437,17 @@ jobs:
           token: ${{ steps.get_token.outputs.token }}
 
       - name: Download build artifact
+        uses: actions/download-artifact@v8
+        with:
+          name: ${{ needs.find_artifact.outputs.artifact_name }}
+          github-token: ${{ github.token }}
+          run-id: ${{ github.event.workflow_run.id }}
+
+      - name: Extract build artifact
         env:
-          TOKEN: ${{ github.token }}
-          ZIPURL: ${{ needs.find_artifact.outputs.zip_url }}
+          ARTIFACT_FILENAME: ${{ needs.find_artifact.outputs.artifact_filename }}
         shell: bash
-        run: |
-          for (( i=1; i<=2; i++ )); do
-            [[ $i -gt 1 ]] && sleep 10
-            echo "::group::Downloading artifact (attempt $i/2)"
-            curl -v -L --get \
-              --header "Authorization: token $TOKEN" \
-              --url "$ZIPURL" \
-              --output "artifact.zip"
-            echo "::endgroup::"
-            if [[ -e "artifact.zip" ]] && zipinfo artifact.zip &>/dev/null; then
-              break
-            fi
-          done
-          [[ ! -e "artifact.zip" ]] && { echo "::error::Failed to download artifact."; exit 1; }
-          unzip artifact.zip
-          tar --xz -xvvf build.tar.xz build
+        run: tar --xz -xvvf "$ARTIFACT_FILENAME" build
 
       - name: Test filename restrictions
         id: tests

.github/workflows/tests.yml

@@ -315,7 +315,7 @@ jobs:
       - name: Upload artifacts
         id: upload-artifacts
         if: always() && steps.check-artifacts.outputs.any == 'true'
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: ${{ matrix.artifact }}
           path: artifacts
@@ -343,7 +343,7 @@ jobs:
         uses: ./.github/actions/tool-setup
 
       - name: Download coverage artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
           name: 'Code coverage'
           path: coverage

.github/workflows/wpcloud.yml

@@ -66,13 +66,13 @@ jobs:
           echo "::endgroup::"
 
       - name: Store artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
-          name: wpcomsh
           path: wpcomsh.tar.xz
           retention-days: 1
           # Already compressed.
           compression-level: 0
+          archive: false
 
   deploy:
     name: Run PHPUnit on the WP Cloud test site
@@ -81,9 +81,9 @@ jobs:
     if: needs.build.outputs.wpcomsh == 'true'
     steps:
       - name: Download build artifact
-        uses: actions/download-artifact@v7
+        uses: actions/download-artifact@v8
         with:
-          name: wpcomsh
+          name: wpcomsh.tar.xz
 
       - name: Configure Github to be able to SSH to the WP Cloud site
         run: |