chore: checklist workflow: Proceed conditionally (#992)

Only generate XLS, etc if the json changes.

Signed-off-by: kingthorin <[email protected]>

Author: kingthorin

.github/workflows/build-checklists.yml

@@ -29,18 +29,26 @@ jobs:
       run: |
         sudo apt update
         sudo apt install moreutils
-    - name: Run JSON Build
+    - name: |
+        npm run-script jsongen
+        git update-index -q --refresh
+        if ! git diff-index --quiet HEAD --; then
+          echo "CHANGED=true" >> $GITHUB_ENV
+        fi
       run: npm run-script jsongen
     - name: Setup Python
+      if: env.CHANGED == 'true'
       uses: actions/setup-python@v4
       with:
         python-version: "3.10"
     - name: Install Dependencies
       run: |
         pip install openpyxl
     - name: Run XLSX Build
+      if: env.CHANGED == 'true'
       run: npm run-script xlsxgen
     - name: Git Setup Global Config
+      if: env.CHANGED == 'true'
       run: |
         # Git setup
         export GITHUB_USER=wstgbot
@@ -49,16 +57,19 @@ jobs:
         git config --global user.email "[email protected]"
         git config --global user.name $GITHUB_USER
     - name: Setup Environment Variables
+      if: env.CHANGED == 'true'
       run : |
         # Setup some env vars etc for future use
         echo "SRC_BASE="OWASP/wstg@"$(git log -1 --format=format:%h)" >> $GITHUB_ENV
         echo "BRANCH_STAMP=$(date +"%Y%m%d%H%M%S")" >> $GITHUB_ENV
         echo "SHORT_DATE=$(date +"%Y-%m-%d")" >> $GITHUB_ENV
     - name: Create Feature Branch
+      if: env.CHANGED == 'true'
       run: |
         # Checkout what will be the new feature branch
         git checkout -b $BRANCH_STAMP
     - name: Push Feature Branch and Raise PR
+      if: env.CHANGED == 'true'
       run: |
         # If there are changes: add, commit, PR
         git add checklists/