From f24368efb73f4b599eaf197d79297bdc98ebfa79 Mon Sep 17 00:00:00 2001
From: Charles Kerr <charles@charleskerr.com>
Date: Wed, 25 Jan 2023 13:22:11 -0600
Subject: [PATCH] build: add webapp github actions (#4658)

---
 .github/workflows/webapp.yml | 143 +++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 .github/workflows/webapp.yml

diff --git a/.github/workflows/webapp.yml b/.github/workflows/webapp.yml
new file mode 100644
index 000000000..3b354a015
--- /dev/null
+++ b/.github/workflows/webapp.yml
@@ -0,0 +1,143 @@
+name: webapp
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+    branches:
+      - 'main'
+jobs:
+  decide-what-jobs-to-run:
+    runs-on: ubuntu-22.04
+    outputs:
+      test-style: ${{ steps.check-diffs.outputs.web-changed == '1' }}
+      test-generated-files: ${{ steps.check-diffs.outputs.web-changed == '1' && steps.check-main-push.outputs.is-main-push == '0'}}
+      update-generated-files: ${{ steps.check-diffs.outputs.web-changed == '1' && steps.check-main-push.outputs.is-main-push == '1'}}
+    steps:
+      - name: Get source
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2 # >1 needed for merge base
+      - name: Check push-to-main
+        id: check-main-push
+        run: |
+          set -x # echo all executed commands to the terminal
+          if [ "$GITHUB_EVENT_NAME" = 'push' ] && [ "$GITHUB_REF_NAME" = 'main' ]; then
+            echo is-main-push=1 >> "$GITHUB_OUTPUT"
+          else
+            echo is-main-push=0 >> "$GITHUB_OUTPUT"
+          fi
+      - name: Check for diffs
+        id: check-diffs
+        run: |
+          set -x # echo all executed commands to the terminal
+          function get_changes() { # name, paths...
+            local name="$1"
+            shift
+            if [ "$GITHUB_EVENT_NAME" = 'push' ] && [ "$GITHUB_REF_NAME" = 'main' ]; then
+              DIFF_TARGET='--name-only HEAD^'
+            else
+              git fetch --depth=1 origin "$GITHUB_BASE_REF"
+              DIFF_TARGET="--merge-base origin/$GITHUB_BASE_REF"
+            fi
+            set +e # do not abort if git --exit-code returns nonzero
+            git diff --exit-code ${DIFF_TARGET} -- "$@"
+            echo "$name-changed=$?" >> "$GITHUB_OUTPUT"
+          }
+          get_changes web CMakeLists.txt web
+
+  code-style:
+    runs-on: ubuntu-latest
+    needs: [ decide-what-jobs-to-run ]
+    if: ${{ needs.decide-what-jobs-to-run.outputs.test-style == 'true' }}
+    steps:
+      - name: Get source
+        uses: actions/checkout@v3
+      - name: Get dependencies
+        run: |
+          set -e # abort if any command fails
+          sudo apt-get install -y npm
+      - name: Check for style diffs
+        id: check-for-diffs
+        run: |
+          set -x # echo all executed commands to the terminal
+          set -e # abort if any command fails
+          npm --prefix web ci
+          npm --prefix web run lint:fix
+          set +e # do not end the script if a cmd returns an exit code
+          git diff --exit-code web > style.diff
+          echo "differs=$?" >> $GITHUB_OUTPUT
+          echo ===
+          cat style.diff
+          echo ===
+          set -e # undo set +e
+      - name: Upload diffs
+        uses: actions/upload-artifact@v3
+        if: ${{ steps.check-for-diffs.outputs.differs == '1' }}
+        with:
+          name: code-style.diff
+          path: 'style.diff'
+      - name: Fail if diffs exist
+        if: ${{ steps.check-for-diffs.outputs.differs == '1' }}
+        run: |
+          echo "code style does not match expected."
+          cat style.diff
+          echo "When CI is done, the above patch will be uploaded as 'code-style.diff' to https://github.com/${GITHUB_REPOSITORY}/actions/runs/${GITHUB_RUN_ID}/ ."
+          exit 1
+
+  test-generated-files:
+    runs-on: ubuntu-latest
+    needs: [ decide-what-jobs-to-run ]
+    if: ${{ needs.decide-what-jobs-to-run.outputs.test-generated-files == 'true' }}
+    steps:
+      - name: Get source
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2 # >1 needed for merge base
+      - name: Check for changes to generated files
+        run: |
+          git fetch --quiet --depth=1 origin "$GITHUB_BASE_REF"
+          set -e # abort if diff --exit-code fails
+          echo
+          echo Hello, code contributor!
+          echo For security reasons, ${GITHUB_REPOSITORY} does not accept PRs that change generated files.
+          echo
+          echo Please undo your changes to these files:
+          git diff --exit-code --name-only --merge-base "origin/$GITHUB_BASE_REF" -- \
+              web/public_html/transmission-app.js \
+              web/public_html/transmission-app.js.map \
+              web/public_html/transmission-app.js.LICENSE.txt
+
+  update-generated-files:
+    runs-on: ubuntu-latest
+    needs: [ decide-what-jobs-to-run ]
+    if: ${{ needs.decide-what-jobs-to-run.outputs.update-generated-files == 'true' }}
+    steps:
+      - name: Show env
+        run: |
+          env | sort
+      - name: Get dependencies
+        run: |
+          set -e # abort if any command fails
+          sudo apt-get install -y npm
+      - name: Get source
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 2 # >1 needed for merge base
+      - name: Generate webapp files
+        run: |
+          set -x # echo all executed commands to the terminal
+          set -e # abort if any command fails
+          npm --prefix web ci
+          npm --prefix web run build
+          git diff --name-only
+          git add --update web
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@v4
+        with:
+          branch: 'chore/update-webapp-files'
+          commit-message: 'chore: update generated transmission-web files'
+          delete-branch: true
+          title: 'chore: update generated transmission-web files'
+          body: Generated from https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}
+