Update release message

.github/workflows/build.yml

@@ -128,7 +128,7 @@ jobs:
           pattern: artifact-*
           merge-multiple: true
 
-      - name: Generate release.md
+      - name: Generate release
         run: |
           tags=($(git tag --merged $(git rev-parse HEAD) --sort=-creatordate))
           preTag=$(curl --silent "https://api.github.com/repos/chen08209/FlClash/releases/latest" | grep -Po '"tag_name": "\K.*?(?=")' || echo "")
@@ -159,6 +159,7 @@ jobs:
             currentTag=$tag
           done
 
+
       - name: Get Branch
         run: |
           branch=$(git branch --contains ${{ github.ref_name }} | grep -v "detached" | sed 's/* //')
@@ -174,6 +175,58 @@ jobs:
           retention-days: 7
           overwrite: true
 
+      - name: Generate changelog
+        if: env.BRANCH == 'main'
+        run: |
+          tags=($(git tag --merged $(git rev-parse HEAD) --sort=-creatordate))
+          preTag=""
+          currentTag=""
+          if [ -f CHANGELOG.md ]; then
+            preTag=$(grep -oP '^## \K.*' CHANGELOG.md | head -n 1)
+          fi
+          for ((i = 0; i <= ${#tags[@]}; i++)); do
+            if (( i < ${#tags[@]} )); then
+              tag=${tags[$i]}
+            else
+              tag=""
+            fi
+            if [ -n "$currentTag" ]; then
+              if [ "$(echo -e "$currentTag\n$preTag" | sort -V | head -n 1)" == "$currentTag" ]; then
+                break
+              fi
+            fi
+            if [ -n "$currentTag" ]; then
+              echo "## $currentTag" >> NEW_CHANGELOG.md
+              echo "" >> NEW_CHANGELOG.md
+              if [ -n "$tag" ]; then
+                git log --pretty=format:"%B" "$tag..$currentTag" | awk 'NF {print "- " $0} !NF {print ""}' >> NEW_CHANGELOG.md
+              else
+                git log --pretty=format:"%B" "$currentTag" | awk 'NF {print "- " $0} !NF {print ""}' >> NEW_CHANGELOG.md
+              fi
+              echo "" >> NEW_CHANGELOG.md
+            fi
+            currentTag=$tag
+          done
+          if [ -f CHANGELOG.md ]; then
+            cat CHANGELOG.md >> NEW_CHANGELOG.md
+          fi
+          mv NEW_CHANGELOG.md CHANGELOG.md
+
+      - name: Commit
+        run: |
+          git config --local user.email "[email protected]"
+          git config --local user.name "chen08209"
+          git add CHANGELOG.md
+
+          if ! git diff --cached --quiet; then
+            git commit -m "Update changelog"
+            git push
+          else
+            echo "CHANGELOG.md not changed"
+          fi
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Release
         if: env.BRANCH == 'main'
         uses: softprops/action-gh-release@v2