Extract version changelog in release process

.gitea/workflows/release.yml

@@ -34,6 +34,20 @@ jobs:
 
           echo "version=$VERSION" >> $GITHUB_OUTPUT
 
+      - name: Extract version changelog
+        id: changelog
+        run: |
+          # VERSION="${{ steps.tag.outputs.version }}"
+          VERSION=$(cat VERSION | tr -d '[:space:]')  # read version and trim whitespace
+          CHANGELOG_FILE=$(python scripts/get_changelog.py $VERSION)
+
+          if [[ $? != 0 ]]; then
+            echo "No changelog found for version $VERSION"
+            exit 1
+          fi
+
+          echo "changelog=$(cat $CHANGELOG_FILE)" >> $GITHUB_OUTPUT
+
       - name: Build Artifacts
         if: steps.tag.outputs.version
         run: |
@@ -46,6 +60,7 @@ jobs:
         id: create_release
         run: |
           VERSION="${{ steps.tag.outputs.version }}"
+          CHANGELOG="${{ steps.changelog.outputs.changelog }}"
           RESPONSE=$(curl -s -X POST \
             -H "Authorization: token ${{ secrets.GITEA_TOKEN }}" \
             -H "Content-Type: application/json" \
@@ -53,7 +68,7 @@ jobs:
             -d '{
               "tag_name": "v'"$VERSION"'",
               "name": "wapp-v'"$VERSION"'",
-              "body": "Automated release for wapp-v'"$VERSION"'",
+              "body": "'"$CHANGELOG"'",
               "draft": false,
               "prerelease": false
             }')

scripts/get_changelog.py

@@ -0,0 +1,57 @@
+import os
+import re
+import argparse
+from pathlib import Path
+from tempfile import mkstemp
+
+VERSION_HEADER = re.compile(r"\[\d+.\d+.\d+\]")
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("version")
+    args = parser.parse_args()
+
+    changelog = get_changelog(args.version)
+    outfilename = save_changelog(args.version, changelog)
+
+    print(outfilename)
+
+
+def get_changelog(version: str) -> list[str]:
+    script_dir = Path(__file__).absolute().parent.parent
+    changelog = script_dir / "CHANGELOG.md"
+
+    with changelog.open("r") as infile:
+        lines = infile.readlines()
+
+    start = -1
+    end = -1
+
+    for i, line in enumerate(lines):
+        if start == -1:
+            match = re.search(version, line)
+            if match is None:
+                continue
+            start = i
+        else:
+            match = VERSION_HEADER.search(line)
+            if match is not None:
+                end = i
+                break
+
+    if start == -1:
+        exit(1)
+
+    return lines[start:end] if end > -1 else lines[start:]
+
+
+def save_changelog(version: str, lines: list[str]) -> str:
+    fd, name = mkstemp(prefix=f"wapp-changelog-{version}-", text=True)
+    os.write(fd, "".join(lines).encode("utf-8"))
+    os.close(fd)
+    return name
+
+
+if __name__ == "__main__":
+    main()