Merge pull request 'vcs' (#1) from vcs into develop

Reviewed-on: https://hattori.ztsh.eu/paas/karl/pulls/1

app/config/settings.py

@@ -1,18 +1,25 @@
 from functools import lru_cache
-
-from pydantic_settings import BaseSettings, SettingsConfigDict
-from pydantic import BaseModel
 from pathlib import Path
+
 import yaml
+from pydantic import BaseModel
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
 
 class AppConfig(BaseModel):
   host: str = "127.0.0.1"
   port: int = 8000
   reload: bool = True
 
+class GitConfig(BaseModel):
+  directory: str = "/opt/repo/sample"
+  branch: str = "master"
+  remote: str = "origin"
+
 class Settings(BaseSettings):
   model_config = SettingsConfigDict(env_prefix="KARL_", env_nested_delimiter="__")
   app: AppConfig = AppConfig()
+  git: GitConfig = GitConfig()
 
   @classmethod
   def from_yaml(cls, path: Path | str = "config/config.yaml") -> "Settings":
@@ -23,6 +30,7 @@ class Settings(BaseSettings):
         data = yaml.safe_load(fh) or {}
     return cls(**data)
 
+
 @lru_cache
 def get_settings() -> Settings:
   return Settings.from_yaml()

app/services/vcs.py

@@ -0,0 +1,28 @@
+from git import Repo, Remote
+
+from app.config import get_settings
+
+
+class GitService:
+  def __init__(self):
+    self._settings = get_settings()
+    self._repo = Repo(self._settings.git.directory)
+    self._origin: Remote = self._repo.remotes.origin
+
+  def get_modified_compose(self) -> str | None:
+    self._update()
+    return self._diff()
+
+  def _update(self):
+    self._origin.pull()
+
+  def _diff(self) -> str | None:
+    diff = self._repo.head.commit.diff("HEAD~1")
+    composes = [f for f in diff if f.a_path.endswith("docker-compose.yml")]
+    match len(composes):
+      case 0:
+        return None
+      case 1:
+        return composes[0].a_path
+      case _:
+        raise Exception("Multiple compose files modified")

pyproject.toml

@@ -11,6 +11,7 @@ dependencies = [
     "jinja2>=3.1.4",
     "pydantic-settings>=2.4.0",
     "pyyaml>=6.0.2",
+    "gitpython>=3.1.45"
 ]
 
 [project.optional-dependencies]