Use git log as fallback for release notes

Part of #545

app/tasks/importtasks.py

@@ -35,7 +35,7 @@ from app.models import AuditSeverity, db, NotificationType, PackageRelease, Meta
 from app.tasks import celery, TaskError
 from app.utils import random_string, post_bot_message, add_system_notification, add_system_audit_log, \
 	get_games_from_list, add_audit_log
-from app.utils.git import clone_repo, get_latest_tag, get_latest_commit, get_temp_dir
+from app.utils.git import clone_repo, get_latest_tag, get_latest_commit, get_temp_dir, get_release_notes
 from .minetestcheck import build_tree, MinetestCheckError, ContentType, PackageTreeNode
 from .webhooktasks import post_discord_webhook
 from app import app
@@ -197,6 +197,12 @@ def post_release_check_update(self, release: PackageRelease, path):
 		except IOError:
 			pass
 
+		# Build release notes from git log
+		if release.commit_hash and release.release_notes is None:
+			previous_release = package.releases.filter(PackageRelease.id != release.id).first()
+			if previous_release and previous_release.commit_hash:
+				release.release_notes = get_release_notes(package.repo, previous_release.commit_hash, release.commit_hash)
+
 		# Update game support
 		if package.type == PackageType.MOD or package.type == PackageType.TXP:
 			game_is_supported = {}
@@ -335,6 +341,7 @@ def make_vcs_release(self, id, branch):
 		raise TaskError("No package attached to release")
 
 	with clone_repo(release.package.repo, ref=branch, recursive=True) as repo:
+		release.commit_hash = repo.head.object.hexsha
 		post_release_check_update(self, release, repo.working_tree_dir)
 
 		filename = random_string(10) + ".zip"
@@ -352,7 +359,6 @@ def make_vcs_release(self, id, branch):
 
 		release.url         = "/uploads/" + filename
 		release.task_id     = None
-		release.commit_hash = repo.head.object.hexsha
 		release.approve(release.package.author)
 		db.session.commit()
 

app/tests/unit/utils/test_git.py

@@ -16,8 +16,7 @@
 
 import os
 
-from app.utils.git import get_latest_tag, get_latest_commit, clone_repo
-
+from app.utils.git import get_latest_tag, get_latest_commit, clone_repo, get_commit_list
 
 test_repo = "https://gitlab.com/rubenwardy/testmod"
 master_head = "23d12265ff6de84548b2e3e90dc7351a54f63f00"
@@ -37,6 +36,19 @@ def test_get_latest_commit():
 	assert get_latest_commit(test_repo, "test-branch") == test_branch_head
 
 
+def test_get_commit_list():
+	result = get_commit_list(test_repo, "4fd0d06df2cc502b0cbc3ee932217b540f0d92ad", "23d12265ff6de84548b2e3e90dc7351a54f63f00")
+	assert result == [
+		"Update .cdb.json",
+		"Update mod.conf",
+		"Update mod.conf",
+		"Update mod.conf",
+		"Update mod.conf",
+		"Update mod.conf",
+		"Update mod.conf",
+	]
+
+
 def test_git_clone_head():
 	with clone_repo(test_repo, recursive=True) as repo:
 		assert repo.head.commit.hexsha == master_head

app/utils/git.py

@@ -16,6 +16,8 @@
 
 
 import contextlib
+from typing import List, Optional
+
 import git
 import gitdb
 import os
@@ -26,7 +28,7 @@ from urllib.parse import urlsplit
 from git import GitCommandError
 
 from app.tasks import TaskError
-from app.utils import random_string
+from app.utils import random_string, normalize_line_endings
 
 
 def generate_git_url(urlstr):
@@ -122,3 +124,23 @@ def get_latest_tag(git_url):
 		tag = hash_ref_list[1].replace("refs/tags/", "")
 		commit_hash = repo.git.rev_parse(tag + "^{}")
 		return tag, commit_hash
+
+
+def get_commit_list(git_url: str, start: str, end: str) -> List[str]:
+	with (get_temp_dir() as git_dir):
+		repo = git.Repo.init(git_dir)
+		origin = repo.create_remote("origin", url=git_url)
+		origin.fetch()
+
+		commits = repo.iter_commits(f"{start}..{end}")
+		ret = [commit.summary for commit in commits]
+		ret.reverse()
+		return ret
+
+
+def get_release_notes(git_url: str, start: str, end: str) -> Optional[str]:
+	commits = get_commit_list(git_url, start, end)
+	if len(commits) == 0:
+		return None
+
+	return normalize_line_endings("\n".join(map(lambda x: f"- {x}", commits)) + f"\n<!-- auto from {start} to {end} -->")