From 763afdc546b8ea88a69ba9d038fccb9b41d58e04 Mon Sep 17 00:00:00 2001
From: Jan Klattenhoff <jan@kjan.de>
Date: Wed, 12 Mar 2025 21:03:40 +0100
Subject: [PATCH 1/4] ci: update CI workflows to include path filters

---
 .gitea/workflows/ci.yml      | 8 ++++++++
 .gitea/workflows/release.yml | 5 +++++
 2 files changed, 13 insertions(+)

diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a19b587..0a64d78 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -2,10 +2,15 @@ name: CI
 
 on:
   pull_request:
+    paths:
+      - 'backend/**'
+      - 'frontend/**'
+      - '.gitea/workflows/ci.yml'
 
 jobs:
   checkstyle:
     name: "Checkstyle Main"
+    if: ${{ contains(github.event.pull_request.changed_files_json, 'backend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
     container:
       image: "cimg/openjdk:23.0-node"
     steps:
@@ -32,6 +37,7 @@ jobs:
 
   eslint:
     name: eslint
+    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -58,6 +64,7 @@ jobs:
 
   prettier:
     name: prettier
+    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -84,6 +91,7 @@ jobs:
 
   test-build:
     name: test-build
+    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 596c53d..ab95401 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -3,6 +3,11 @@ on:
   push:
     branches:
       - "main"
+    paths:
+      - 'backend/**'
+      - 'frontend/**'
+      - '.gitea/workflows/release.yml'
+      - 'release.config.cjs'
 
 env:
   GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}

From db37f0de35f8b2b20e18e4e5fcdc6f2fec8bf2eb Mon Sep 17 00:00:00 2001
From: Jan Klattenhoff <jan@kjan.de>
Date: Wed, 12 Mar 2025 21:05:03 +0100
Subject: [PATCH 2/4] chore: add new file a to the backend directory

---
 backend/a | 0
 1 file changed, 0 insertions(+), 0 deletions(-)
 create mode 100644 backend/a

diff --git a/backend/a b/backend/a
new file mode 100644
index 0000000..e69de29

From fd7c92ebb161049764313fd1148171eb3e7a8a51 Mon Sep 17 00:00:00 2001
From: Jan Klattenhoff <jan@kjan.de>
Date: Wed, 12 Mar 2025 21:06:25 +0100
Subject: [PATCH 3/4] ci: update CI workflow to check for changed files

---
 .gitea/workflows/ci.yml | 37 +++++++++++++++++++++++++++++--------
 1 file changed, 29 insertions(+), 8 deletions(-)

diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 0a64d78..792fca9 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -2,15 +2,33 @@ name: CI
 
 on:
   pull_request:
-    paths:
-      - 'backend/**'
-      - 'frontend/**'
-      - '.gitea/workflows/ci.yml'
 
 jobs:
+  changed_files:
+    name: Get Changed Files
+    runs-on: ubuntu-latest
+    outputs:
+      backend: ${{ steps.filter.outputs.backend }}
+      frontend: ${{ steps.filter.outputs.frontend }}
+      workflow: ${{ steps.filter.outputs.workflow }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for file changes
+        uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          filters: |
+            backend:
+              - 'backend/**'
+            frontend:
+              - 'frontend/**'
+            workflow:
+              - '.gitea/workflows/**'
+
   checkstyle:
     name: "Checkstyle Main"
-    if: ${{ contains(github.event.pull_request.changed_files_json, 'backend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.backend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: "cimg/openjdk:23.0-node"
     steps:
@@ -37,7 +55,8 @@ jobs:
 
   eslint:
     name: eslint
-    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -64,7 +83,8 @@ jobs:
 
   prettier:
     name: prettier
-    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -91,7 +111,8 @@ jobs:
 
   test-build:
     name: test-build
-    if: ${{ contains(github.event.pull_request.changed_files_json, 'frontend/') || contains(github.event.pull_request.changed_files_json, '.gitea/workflows/ci.yml') }}
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:

From 0227146da79a9973ae3c7234f0c50eb387fc9852 Mon Sep 17 00:00:00 2001
From: Jan Klattenhoff <jan@kjan.de>
Date: Wed, 12 Mar 2025 21:08:49 +0100
Subject: [PATCH 4/4] ci: improve checkstyle report caching in CI workflow

---
 .gitea/workflows/ci.yml | 32 ++++++++++++++++++++++++++------
 1 file changed, 26 insertions(+), 6 deletions(-)

diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 792fca9..b0b2c79 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -40,16 +40,36 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: gradle-${{ runner.os }}-common
+            backend/build/reports/checkstyle
+          key: gradle-${{ runner.os }}-${{ hashFiles('backend/**/*.java', 'backend/config/checkstyle/checkstyle.xml') }}
           restore-keys: |
             gradle-${{ runner.os }}-
-      - name: "Prepare Gradle"
+      - name: "Check cache for checkstyle reports"
+        id: check-cache
+        run: |
+          if [ -d "backend/build/reports/checkstyle" ] && [ -f "backend/build/reports/checkstyle/main.xml" ]; then
+            echo "Cache hit! Using cached checkstyle results"
+            echo "cache-hit=true" >> $GITHUB_OUTPUT
+          else
+            echo "Cache miss! Running checkstyle check"
+            echo "cache-hit=false" >> $GITHUB_OUTPUT
+          fi
+      
+      - name: "Run checkstyle"
+        if: steps.check-cache.outputs.cache-hit != 'true'
         working-directory: ./backend
-        run: gradle clean
-      - name: "Check"
-        working-directory: ./backend
-        run: gradle checkstyleMain
+        run: |
+          gradle checkstyleMain
+          
+      - name: "Cache checkstyle results"
+        if: steps.check-cache.outputs.cache-hit != 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: checkstyle-results
+          path: backend/build/reports/checkstyle
+          
       - name: "Stop Gradle"
+        if: steps.check-cache.outputs.cache-hit != 'true'
         working-directory: ./backend
         run: gradle --stop