ci: Fetch full history for comparing to main

.github/workflows/test-import.yml

@@ -11,8 +11,11 @@ jobs:
     steps:
     - name: Check out code
       uses: actions/checkout@v3
-    - name: Fetch submodules
-      run: git submodule update --init --checkout --remote
+      with:
+        # Pull history, needed to compare changed files
+        fetch-depth: 2
+    - name: Fetch branches and submodules
+      run: git fetch --all && git submodule update --init --checkout --remote
     - name: Build docker images
       run: docker build -t transitous . -f ci/container/Containerfile
     - name: Verify that new feeds can be downloaded

ci/fetch-feeds.py

@@ -20,9 +20,10 @@
         for feed in feed_dir.glob("*.json"):
             subprocess.check_call(["./src/fetch.py", str(feed.absolute())])
     case "merge-request":
+        # Find all files that were changed in the latest commit
         changed_files = subprocess.check_output(
-            ["git", "diff", "--name-only", "HEAD^1", "HEAD"]) \
-                .decode().splitlines()
+            ["git", "diff", "--name-only", "origin/main", "HEAD"]) \
+            .decode().splitlines()
 
         changed_feeds = [f for f in changed_files if
                          f.startswith("feeds/") and f.endswith(".json")]