ci: auto-generate release notes from commits

.drone.yml

@@ -24,6 +24,16 @@ steps:
     - go install golang.org/x/vuln/cmd/govulncheck@latest
     - govulncheck -json ./... > vulncheck.json
 
+- name: release-notes
+  image: alpine/git
+  commands:
+    - bash scripts/generate-release-notes.sh
+  when:
+    event:
+      - tag
+    status:
+      - success
+
 - name: package
   image: golang:1.25.8
   commands:
@@ -42,8 +52,9 @@ steps:
     files: 
       - .build/coverage.txt
       - .build/sources.tar.gz
+      - .build/release-notes.md
     title: ${DRONE_TAG}
-    note: "Release ${DRONE_TAG}\n\nCoverage report: coverage.txt"
+    note_from_file: .build/release-notes.md
   when:
     event:
       - tag

scripts/generate-release-notes.sh

@@ -0,0 +1,71 @@
+#!/bin/bash
+# Generate release notes from commits since the last tag
+
+set -e
+
+CURRENT_TAG="${1:-${DRONE_TAG}}"
+OUTPUT_FILE="${2:-.build/release-notes.md}"
+
+if [ -z "$CURRENT_TAG" ]; then
+    echo "Error: Current tag not provided"
+    exit 1
+fi
+
+# Find the previous tag
+PREVIOUS_TAG=$(git describe --tags --abbrev=0 "$CURRENT_TAG"^ 2>/dev/null || echo "")
+
+mkdir -p "$(dirname "$OUTPUT_FILE")"
+
+# Start release notes
+{
+    echo "# Release $CURRENT_TAG"
+    echo ""
+    
+    if [ -n "$PREVIOUS_TAG" ]; then
+        echo "**Changes since $PREVIOUS_TAG:**"
+        echo ""
+        
+        # Extract commits and group by type (feat, fix, docs, ci, etc.)
+        git log "$PREVIOUS_TAG..$CURRENT_TAG" --pretty=format:"%s" | while read -r commit; do
+            # Parse conventional commits
+            if [[ $commit =~ ^([a-z]+)(\(.+\))?:\ (.+)$ ]]; then
+                TYPE="${BASH_REMATCH[1]}"
+                SCOPE="${BASH_REMATCH[2]}"
+                MESSAGE="${BASH_REMATCH[3]}"
+                
+                case "$TYPE" in
+                    feat)
+                        echo "- ✨ **Feature**${SCOPE}: $MESSAGE" ;;
+                    fix)
+                        echo "- 🐛 **Fix**${SCOPE}: $MESSAGE" ;;
+                    docs)
+                        echo "- 📖 **Docs**${SCOPE}: $MESSAGE" ;;
+                    ci)
+                        echo "- 🔧 **CI**${SCOPE}: $MESSAGE" ;;
+                    test)
+                        echo "- ✅ **Test**${SCOPE}: $MESSAGE" ;;
+                    refactor)
+                        echo "- ♻️ **Refactor**${SCOPE}: $MESSAGE" ;;
+                    perf)
+                        echo "- ⚡ **Performance**${SCOPE}: $MESSAGE" ;;
+                    *)
+                        echo "- 📝 $commit" ;;
+                esac
+            else
+                echo "- 📝 $commit"
+            fi
+        done
+    else
+        echo "Initial release"
+        echo ""
+        git log "$CURRENT_TAG" --pretty=format:"- 📝 %s" | head -20
+    fi
+    
+    echo ""
+    echo "---"
+    echo "See [all changes](https://scm.yoorie.de/git/go-lib/util/compare/$PREVIOUS_TAG...$CURRENT_TAG)"
+    
+} > "$OUTPUT_FILE"
+
+echo "Release notes generated: $OUTPUT_FILE"
+cat "$OUTPUT_FILE"