also create webhooks automatically

.gitignore

@@ -1 +1,162 @@
 result
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+#   Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+#   This is especially recommended for binary packages to ensure reproducibility, and is more
+#   commonly ignored for libraries.
+#   https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+#   Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+#   pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+#   in version control.
+#   https://pdm.fming.dev/#use-with-ide
+.pdm.toml
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/

buildbot_nix/buildbot_nix.py

@@ -19,7 +19,11 @@ from buildbot.process.project import Project
 from buildbot.process.properties import Interpolate, Properties
 from buildbot.process.results import ALL_RESULTS, statusToString
 from buildbot.steps.trigger import Trigger
-from github_projects import GithubProject, load_projects  # noqa: E402
+from github_projects import (  # noqa: E402
+    GithubProject,
+    create_project_hook,
+    load_projects,
+)
 from twisted.internet import defer
 
 
@@ -511,7 +515,7 @@ class GithubConfig:
     webhook_secret_name: str = "github-webhook-secret"
     token_secret_name: str = "github-token"
     project_cache_file: Path = Path("github-project-cache.json")
-    topic_filter: str | None = "build-with-buildbot"
+    topic: str | None = "build-with-buildbot"
 
     def token(self) -> str:
         return read_secret_file(self.token_secret_name)
@@ -621,6 +625,7 @@ class NixConfigurator(ConfiguratorBase):
         # Shape of this file:
         # [ { "name": "<worker-name>", "pass": "<worker-password>", "cores": "<cpu-cores>" } ]
         github: GithubConfig,
+        url: str,
         nix_supported_systems: list[str],
         nix_eval_max_memory_size: int = 4096,
         nix_workers_secret_name: str = "buildbot-nix-workers",
@@ -630,12 +635,13 @@ class NixConfigurator(ConfiguratorBase):
         self.nix_eval_max_memory_size = nix_eval_max_memory_size
         self.nix_supported_systems = nix_supported_systems
         self.github = github
+        self.url = url
         self.systemd_credentials_dir = os.environ["CREDENTIALS_DIRECTORY"]
 
     def configure(self, config: dict[str, Any]) -> None:
         projects = load_projects(self.github.token(), self.github.project_cache_file)
-        if self.github.topic_filter is not None:
+        if self.github.topic is not None:
-            projects = [p for p in projects if self.github.topic_filter in p.topics]
+            projects = [p for p in projects if self.github.topic in p.topics]
         worker_config = json.loads(read_secret_file(self.nix_workers_secret_name))
         worker_names = []
         config["workers"] = config.get("workers", [])
@@ -647,6 +653,15 @@ class NixConfigurator(ConfiguratorBase):
                 worker_names.append(worker_name)
 
         config["projects"] = config.get("projects", [])
+
+        for project in projects:
+            create_project_hook(
+                project.owner,
+                project.repo,
+                self.github.token(),
+                f"{self.url}/change_hook/github",
+            )
+
         for project in projects:
             config_for_project(
                 config,
@@ -657,6 +672,7 @@ class NixConfigurator(ConfiguratorBase):
                 self.nix_supported_systems,
                 self.nix_eval_max_memory_size,
             )
+
         config["services"] = config.get("services", [])
         config["services"].append(
             reporters.GitHubStatusPush(

buildbot_nix/github_projects.py

@@ -30,18 +30,28 @@ def http_request(
     headers = headers.copy()
     headers["User-Agent"] = "buildbot-nix"
     req = urllib.request.Request(url, headers=headers, method=method, data=body)
-    resp = urllib.request.urlopen(req)
+    try:
+        resp = urllib.request.urlopen(req)
+    except urllib.request.HTTPError as e:
+        body = ""
+        try:
+            body = e.fp.read()
+        except Exception:
+            pass
+        raise Exception(
+            f"Request for {method} {url} failed with {e.code} {e.reason}: {body}"
+        ) from e
     return HttpResponse(resp)
 
 
 def paginated_github_request(url: str, token: str) -> list[dict[str, Any]]:
     next_url: str | None = url
-    repos = []
+    items = []
     while next_url:
         try:
             res = http_request(
                 next_url,
-                headers={"Authorization": f"token {token}"},
+                headers={"Authorization": f"Bearer {token}"},
             )
         except OSError as e:
             raise Exception(f"failed to fetch {next_url}: {e}") from e
@@ -53,34 +63,67 @@ def paginated_github_request(url: str, token: str) -> list[dict[str, Any]]:
                 link_parts = link.split(";")
                 if link_parts[1].strip() == 'rel="next"':
                     next_url = link_parts[0][1:-1]
-        repos += res.json()
+        items += res.json()
-    return repos
+    return items
 
 
 class GithubProject:
-    def __init__(self, repo: dict[str, Any]) -> None:
+    def __init__(self, data: dict[str, Any]) -> None:
-        self.repo = repo
+        self.data = data
+
+    @property
+    def repo(self) -> str:
+        return self.data["name"]
+
+    @property
+    def owner(self) -> str:
+        return self.data["owner"]["login"]
 
     @property
     def name(self) -> str:
-        return self.repo["full_name"]
+        return self.data["full_name"]
 
     @property
     def url(self) -> str:
-        return self.repo["html_url"]
+        return self.data["html_url"]
 
     @property
     def id(self) -> str:
-        n = self.repo["full_name"]
+        n = self.data["full_name"]
         return n.replace("/", "-")
 
     @property
     def default_branch(self) -> str:
-        return self.repo["default_branch"]
+        return self.data["default_branch"]
 
     @property
     def topics(self) -> list[str]:
-        return self.repo["topics"]
+        return self.data["topics"]
+
+
+def create_project_hook(owner: str, repo: str, token: str, webhook_url: str) -> None:
+    hooks = paginated_github_request(
+        f"https://api.github.com/repos/{owner}/{repo}/hooks?per_page=100", token
+    )
+    config = dict(url=webhook_url, content_type="json", insecure_ssl="0")
+    data = dict(name="web", active=True, events=["push", "pull_request"], config=config)
+    headers = {
+        "Authorization": f"Bearer {token}",
+        "Accept": "application/vnd.github+json",
+        "Content-Type": "application/json",
+        "X-GitHub-Api-Version": "2022-11-28",
+    }
+    for hook in hooks:
+        if hook["config"]["url"] == webhook_url:
+            log.msg(f"hook for {owner}/{repo} already exists")
+            return
+
+    http_request(
+        f"https://api.github.com/repos/{owner}/{repo}/hooks",
+        method="POST",
+        headers=headers,
+        data=data,
+    )
 
 
 def load_projects(github_token: str, repo_cache_file: Path) -> list[GithubProject]:

nix/master.nix

@@ -109,6 +109,7 @@ in
                   buildbot_user=${builtins.toJSON cfg.github.user},
                   topic=${builtins.toJSON cfg.github.topic},
               ),
+              url=${builtins.toJSON config.services.buildbot-master.buildbotUrl},
               nix_eval_max_memory_size=${builtins.toJSON cfg.evalMaxMemorySize},
               nix_supported_systems=${builtins.toJSON cfg.buildSystems},
           )