Add CI to validate pipeline

.github/workflows/pipeline_linter.yml

@@ -0,0 +1,15 @@
+name: Pipeline-Linter
+
+on:
+  pull_request:
+    branches: [master]
+
+jobs:
+  syntax_check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Check Jenkinsfile file
+        run: bash ./tests/pipeline_linter.sh Jenkinsfile

tests/README.md

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+# Pipeline Linter
+
+[How to run Pipeline Linter locally](https://github.com/fedora-ci/docs/blob/master/docs/command_line_pipeline_linter.md)

tests/pipeline_linter.sh

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+#!/usr/bin/bash
+
+if [ $# -ne 1 ]; then
+    echo $0: "USAGE: ./pipeline_linter.sh jenkins_filename"
+    exit 1
+fi
+
+FILE=$1
+
+OUTPUT=$(curl -X POST -F "jenkinsfile=<$FILE" https://osci-jenkins-1.ci.fedoraproject.org/pipeline-model-converter/validate)
+
+if [[ "$OUTPUT" =~ .*"successfully validated".* ]]; then
+  echo "$OUTPUT"
+  exit 0
+else
+  echo "$OUTPUT"
+  exit 1
+fi