Add GitLab webhook support

app/blueprints/gitlab/__init__.py

@@ -0,0 +1,64 @@
+# ContentDB
+# Copyright (C) 2020  rubenwardy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+from flask import Blueprint, request
+
+bp = Blueprint("gitlab", __name__)
+
+from app import csrf
+from app.models import Package, APIToken, Permission
+from app.blueprints.api.support import error, handleCreateRelease
+
+
+@bp.route("/gitlab/webhook/", methods=["POST"])
+@csrf.exempt
+def webhook():
+	json = request.json
+
+	# Get package
+	gitlab_url = "gitlab.com/{}/{}".format(json["project"]["namespace"], json["project"]["name"])
+	package = Package.query.filter(Package.repo.like("%{}%".format(gitlab_url))).first()
+	if package is None:
+		return error(400, "Unknown package")
+
+	# Get all tokens for package
+	secret = request.headers.get("X-Gitlab-Token")
+	if secret is None:
+		return error(403, "Token required")
+
+	token = APIToken.query.filter_by(access_token=secret).first()
+	if secret is None:
+		return error(403, "Invalid authentication")
+
+	if not package.checkPerm(token.owner, Permission.APPROVE_RELEASE):
+		return error(403, "Only trusted members can use webhooks")
+
+	#
+	# Check event
+	#
+
+	event = json["event_name"]
+	if event == "push":
+		ref = json["after"]
+		title = ref[:5]
+	else:
+		return error(400, "Unsupported event. Only 'push' is supported.")
+
+	#
+	# Perform release
+	#
+
+	return handleCreateRelease(token, package, title, ref)

app/flatpages/help.md

@@ -5,3 +5,4 @@ title: Help
 * [Content Ratings and Flags](content_flags)
 * [Reporting Content](reporting)
 * [API](api)
+* [Creating Releases using Webhooks](release_webhooks)

app/flatpages/help/release_webhooks.md

@@ -0,0 +1,72 @@
+title: Creating Releases using Webhooks
+
+## What does this mean?
+
+ContentDB offers the ability to automatically create releases using webhooks
+from either Github or Gitlab. If you're not using either of those services,
+you can also use the [API](../api) to create releases.
+
+The process is as follows:
+
+1. The user creates an API Token and a webhook to use it. This can be done automatically
+   for Github.
+2. The user pushes a commit to the git host (Gitlab or Github).
+3. The git host posts a webhook notification to ContentDB, using the API token assigned to it.
+4. ContentDB checks the API token and issues a new releases.
+
+<p class="alert alert-info">
+	This feature is in beta, and is only available for Trusted Members.
+</p>
+
+## Setting up
+
+### Github (automatic)
+
+1. Go to your package page.
+2. Make sure that the repository URL is set to a Github repository.
+   Only github.com is supported.
+3. Click "Set up a webhook to create releases automatically" below the releases
+   panel on the side bar.
+4. Grant ContentDB the ability to manage Webhooks
+
+### GitHub (manual)
+
+1. Create an API Token by visiting your profile and clicking "API Tokens: Manage".
+2. Copy the access token that was generated.
+3. Go to the repository's settings > Webhooks > Add Webhook.
+4. Set the payload URL to `https://content.minetest.net/github/webhook/`
+5. Set the content type to JSON.
+6. Set the secret to the access token that you copied.
+7. Set the events
+  * If you want a rolling release, choose "just the push event".
+  * Or if you want a stable release cycle based on tags,
+   choose "Let me select" > Branch or tag creation.
+
+### GitLab (manual)
+
+1. Create an API Token by visiting your profile and clicking "API Tokens: Manage".
+2. Copy the access token that was generated.
+3. Go to the repository's settings > Integrations.
+4. Set the URL to `https://content.minetest.net/gitlab/webhook/`
+6. Set the secret token to the access token that you copied.
+7. Set the events
+    * If you want a rolling release, choose "Push events".
+    * Or if you want a stable release cycle based on tags,
+      choose "Tag push events".
+
+## Configuring
+
+### Setting minimum and maximum Minetest versions
+
+<p class="alert alert-info">
+	This feature is unimplemented.
+</p>
+
+1. Open up the conf file for the package.
+   This will be `game.conf`, `mod.conf`, `modpack.conf`, or `texture_pack.conf`
+   depending on the content type.
+2. Set `min_protocol` and `max_protocol` to the respective protocol numbers
+   of the Minetest versions.
+     * 0.4 = 32
+     * 5.0 = 37
+     * 5.1 = 38