test: check if environment variable exists

Author: laraPPr

.github/workflows/scripts/filter_git_diff.py

@@ -24,10 +24,11 @@
         # Ignoring the status assigned to the file
         diff_filtered += file + ' '
 
-# If we will at some point add paths to in diff_filter_path
-# we'll have to remove '/'
-env_var = 'CHANGED_' + diff_filter_path.upper()
-set_var = env_var + "=" + diff_filtered
-
-with open(env_file, 'a') as file:
-    file.write(set_var)
+if diff_filtered != '':
+    # If we will at some point add paths to in diff_filter_path
+    # we'll have to remove '/'
+    env_var = 'CHANGED_' + diff_filter_path.upper()
+    set_var = env_var + "=" + diff_filtered
+
+    with open(env_file, 'a') as file:
+        file.write(set_var)

.github/workflows/test_new_action_based_on_dorny.yml

@@ -42,9 +42,9 @@ jobs:
             echo "git diff --no-renames --name-status ${GITHUB_BASE_REF}..HEAD"
             export CHANGED=$(git diff --no-renames --name-status origin/${GITHUB_BASE_REF}..HEAD)
             echo $CHANGED
-            #echo "CHANGED=${CHANGED}" >> $GITHUB_ENV
             python .github/workflows/scripts/filter_git_diff.py
         - name: Are there changed files
+          if: env.TEST
           run: |
             echo $CHANGED_EASYSTACKS
 #        - name: Mount EESSI CernVM-FS pilot repository