From 2d5f8f48f510146c59fe5531f2eb61d2f1344367 Mon Sep 17 00:00:00 2001
From: Tim <carlfriedrich@posteo.de>
Date: Mon, 4 Nov 2024 10:17:59 +0100
Subject: [PATCH] Meta: do not create release when there are no public changes
 (#401)

---
 .github/scripts/changelog.sh   | 9 +++++++++
 .github/workflows/release.yaml | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/.github/scripts/changelog.sh b/.github/scripts/changelog.sh
index f8e80d6f..196bc038 100755
--- a/.github/scripts/changelog.sh
+++ b/.github/scripts/changelog.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+release_has_public_changes=false
+
 url=$(git remote get-url origin | sed -r 's/(.*)\.git/\1/')
 
 previous_tag=$(git describe --tags --abbrev=0 HEAD~)
@@ -23,5 +25,12 @@ do
             # Escape markdown formatting symbols _ * `
             echo "  $line" | sed 's/_/\\_/g' | sed 's/`/\\`/g' | sed 's/\*/\\\*/g'
         done
+        release_has_public_changes=true
     fi
 done
+
+if ! $release_has_public_changes
+then
+    echo "No public changes since $previous_tag." >&2
+    exit 1
+fi
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index 33527a9c..a88dfc35 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,10 +20,13 @@ jobs:
         run: tar -czf forgit-${{github.ref_name}}.tar.gz --exclude LICENSE --exclude README.md *
 
       - name: Generate Changelog
+        id: changelog
         run: .github/scripts/changelog.sh > CHANGELOG.md
+        continue-on-error: true
 
       - name: Release
         uses: softprops/action-gh-release@v2
+        if: steps.changelog.outcome == 'success'
         with:
           body_path: CHANGELOG.md
           files: forgit-${{github.ref_name}}.tar.gz