From f07c54916faea2859494a8c6e608a32cda771960 Mon Sep 17 00:00:00 2001
From: Serein Pfeiffer <s.pfeiffer@klebert-engineering.de>
Date: Mon, 5 Oct 2026 08:59:26 +0200
Subject: [PATCH 1/4] Add own keep-alive job to Linux and Windows workflows

---
 .github/workflows/build_linux.yml   | 8 ++++++++
 .github/workflows/build_windows.yml | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/.github/workflows/build_linux.yml b/.github/workflows/build_linux.yml
index 23a1561..9f2f738 100644
--- a/.github/workflows/build_linux.yml
+++ b/.github/workflows/build_linux.yml
@@ -110,3 +110,11 @@ jobs:
       with:
         name: zserio-tutorial-cpp-${{matrix.os}}
         path: build/ZserioTutorialCpp
+
+  keepalive:
+    if: github.event_name == 'schedule'
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+    steps:
+      - uses: liskin/gh-workflow-keepalive@v1
diff --git a/.github/workflows/build_windows.yml b/.github/workflows/build_windows.yml
index 01c5a77..a582a5e 100644
--- a/.github/workflows/build_windows.yml
+++ b/.github/workflows/build_windows.yml
@@ -120,3 +120,11 @@ jobs:
       with:
         name: zserio-tutorial-cpp-${{matrix.os}}
         path: build/Release/ZserioTutorialCpp.exe
+
+  keepalive:
+    if: github.event_name == 'schedule'
+    runs-on: ubuntu-latest
+    permissions:
+      actions: write
+    steps:
+      - uses: liskin/gh-workflow-keepalive@v1

From c997f13838a3ca1dfdb548cece686c735f523d7d Mon Sep 17 00:00:00 2001
From: Serein Pfeiffer <s.pfeiffer@klebert-engineering.de>
Date: Mon, 5 Oct 2026 08:59:26 +0200
Subject: [PATCH 2/4] Remove KeepAlive workflow that only kept itself alive

---
 .github/workflows/keep_alive.yml | 14 --------------
 1 file changed, 14 deletions(-)
 delete mode 100644 .github/workflows/keep_alive.yml

diff --git a/.github/workflows/keep_alive.yml b/.github/workflows/keep_alive.yml
deleted file mode 100644
index db68bd1..0000000
--- a/.github/workflows/keep_alive.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-name: KeepAlive
-
-on:
-  schedule:
-    - cron: "0 0 * * 1"
-
-jobs:
-  workflow-keepalive:
-    if: github.event_name == 'schedule'
-    runs-on: ubuntu-latest
-    permissions:
-      actions: write
-    steps:
-      - uses: liskin/gh-workflow-keepalive@v1

From 50f21ebb9047439d379d7a21cc5364f1f66070d6 Mon Sep 17 00:00:00 2001
From: Serein Pfeiffer <s.pfeiffer@klebert-engineering.de>
Date: Mon, 5 Oct 2026 08:59:47 +0200
Subject: [PATCH 3/4] Fail regeneration steps when regenerated sources differ
 from committed ones

---
 .github/workflows/build_linux.yml   | 6 ++++++
 .github/workflows/build_windows.yml | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/.github/workflows/build_linux.yml b/.github/workflows/build_linux.yml
index 9f2f738..1c47b7f 100644
--- a/.github/workflows/build_linux.yml
+++ b/.github/workflows/build_linux.yml
@@ -58,6 +58,9 @@ jobs:
         rm -rd *
         cmake .. -DCMAKE_BUILD_TYPE=Release -DREGENERATE_CPP_SOURCES=ON
         cmake --build .
+        cd ..
+        git add --intent-to-add --all -- src
+        git diff --exit-code -- src
 
     - name: Test Zserio C++ tutorial (sources regeneration)
       run: |
@@ -97,6 +100,9 @@ jobs:
         rm -rd *
         cmake ../pmr -DCMAKE_BUILD_TYPE=Release -DREGENERATE_CPP_SOURCES=ON
         cmake --build .
+        cd ..
+        git add --intent-to-add --all -- pmr/src
+        git diff --exit-code -- pmr/src
 
     - name: Test Zserio C++ custom memory management tutorial (sources regeneration)
       run: |
diff --git a/.github/workflows/build_windows.yml b/.github/workflows/build_windows.yml
index a582a5e..e508a91 100644
--- a/.github/workflows/build_windows.yml
+++ b/.github/workflows/build_windows.yml
@@ -60,6 +60,9 @@ jobs:
         rm -rd *
         cmake .. -DREGENERATE_CPP_SOURCES=ON
         cmake --build . --config Release
+        cd ..
+        git add --intent-to-add --all -- src
+        git diff --exit-code -- src
       shell: bash
 
     - name: Test Zserio C++ tutorial (sources regeneration)
@@ -105,6 +108,9 @@ jobs:
         rm -rd *
         cmake ../pmr -DREGENERATE_CPP_SOURCES=ON
         cmake --build . --config Release
+        cd ..
+        git add --intent-to-add --all -- pmr/src
+        git diff --exit-code -- pmr/src
       shell: bash
 
     - name: Test Zserio C++ custom memory management tutorial (sources regeneration)

From 55f689052735aac7cb5690bc4c38e7bc8535e8c6 Mon Sep 17 00:00:00 2001
From: Serein Pfeiffer <s.pfeiffer@klebert-engineering.de>
Date: Mon, 5 Oct 2026 09:07:12 +0200
Subject: [PATCH 4/4] Regenerate sources with -ignoreTimestamps so stale
 committed files get overwritten

---
 CMakeLists.txt     | 2 +-
 pmr/CMakeLists.txt | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd99b60..002c944 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ if (REGENERATE_CPP_SOURCES)
 
     MESSAGE(STATUS "Compiling zserio tutorial schema")
     execute_process(COMMAND ${Java_JAVA_EXECUTABLE} -jar "${ZSERIO_JAR}"
-            -cpp ${TUTORIAL_ZSERIO_GEN_DIR} -src ${CMAKE_CURRENT_SOURCE_DIR} tutorial.zs
+            -cpp ${TUTORIAL_ZSERIO_GEN_DIR} -src ${CMAKE_CURRENT_SOURCE_DIR} tutorial.zs -ignoreTimestamps
         OUTPUT_VARIABLE ZSERIO_OUTPUT
         RESULT_VARIABLE ZSERIO_RESULT_CODE)
     if (ZSERIO_RESULT_CODE)
diff --git a/pmr/CMakeLists.txt b/pmr/CMakeLists.txt
index 5f3c445..b63ac96 100644
--- a/pmr/CMakeLists.txt
+++ b/pmr/CMakeLists.txt
@@ -15,7 +15,7 @@ if (REGENERATE_CPP_SOURCES)
 
     MESSAGE(STATUS "Compiling zserio tutorial schema")
     execute_process(COMMAND ${Java_JAVA_EXECUTABLE} -jar "${ZSERIO_JAR}"
-            -cpp ${TUTORIAL_ZSERIO_GEN_DIR} -src ${CMAKE_CURRENT_SOURCE_DIR}/.. tutorial.zs
+            -cpp ${TUTORIAL_ZSERIO_GEN_DIR} -src ${CMAKE_CURRENT_SOURCE_DIR}/.. tutorial.zs -ignoreTimestamps
             -setCppAllocator polymorphic
         OUTPUT_VARIABLE ZSERIO_OUTPUT
         RESULT_VARIABLE ZSERIO_RESULT_CODE)