ci: ignore line lint for empty files, add C/C# labels (#499)

* ci: ignore line lint check for empty files

* ci: add label configs for C and C# files

Author: bky373

.github/labeler.yml

@@ -18,11 +18,21 @@ java:
       - any-glob-to-any-file:
           - "**/*.java"
 
+c:
+  - changed-files:
+      - any-glob-to-any-file:
+          - "**/*.c"
+
 c++:
   - changed-files:
       - any-glob-to-any-file:
           - "**/*.cpp"
 
+c#:
+  - changed-files:
+      - any-glob-to-any-file:
+          - "**/*.cs"
+
 swift:
   - changed-files:
       - any-glob-to-any-file:

.github/workflows/integration.yaml

@@ -16,7 +16,7 @@ jobs:
           files=$(git diff --name-only ${{ github.event.pull_request.base.sha }} ${{ github.sha }})
           success=true
           for file in $files; do
-            if [ "$(tail -c 1 $file | wc -l)" -eq 0 ]; then
+            if [ -s "$file" ] && [ "$(tail -c 1 $file | wc -l)" -eq 0 ]; then
               echo "- $file" >> $GITHUB_STEP_SUMMARY
               success=false
             fi