Add source code files

src/codeguard/git/hooks.py

@@ -0,0 +1,76 @@
+"""Git hooks management for CodeGuard."""
+
+import os
+import stat
+from pathlib import Path
+
+
+class HookManager:
+    HOOK_SCRIPT = """#!/bin/bash
+# CodeGuard pre-commit hook
+# This hook runs CodeGuard security analysis before commit
+
+set -e
+
+# Get the root directory of the git repository
+GIT_DIR=$(git rev-parse --git-dir)
+REPO_ROOT=$(git rev-parse --show-toplevel)
+
+# Change to repository root
+cd "$REPO_ROOT"
+
+# Run CodeGuard scan
+# Exit with error code if scan fails or finds critical issues
+exec codeguard scan --fail-level critical
+"""
+
+    def __init__(self, repo_path: str = "."):
+        self.repo_path = Path(repo_path).resolve()
+        self.git_dir = self.repo_path / ".git"
+        self.hooks_dir = self.git_dir / "hooks"
+
+    def install(self, force: bool = False) -> bool:
+        if not self.git_dir.exists():
+            raise NotAGitRepository(f"Not a git repository: {self.repo_path}")
+
+        self.hooks_dir.mkdir(parents=True, exist_ok=True)
+
+        hook_path = self.hooks_dir / "pre-commit"
+
+        if hook_path.exists() and not force:
+            existing_content = hook_path.read_text()
+            if "codeguard" in existing_content.lower():
+                return False
+
+        hook_content = self._generate_hook_script()
+        hook_path.write_text(hook_content)
+
+        os.chmod(hook_path, hook_path.stat().st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
+        return True
+
+    def uninstall(self) -> None:
+        hook_path = self.hooks_dir / "pre-commit"
+        if hook_path.exists():
+            hook_path.unlink()
+
+    def _generate_hook_script(self) -> str:
+        return self.HOOK_SCRIPT
+
+    def check_installed(self) -> bool:
+        hook_path = self.hooks_dir / "pre-commit"
+        if not hook_path.exists():
+            return False
+
+        content = hook_path.read_text()
+        return "codeguard" in content.lower()
+
+    def get_hook_path(self) -> Path:
+        return self.hooks_dir / "pre-commit"
+
+
+class NotAGitRepository(Exception):
+    pass
+
+
+class HookAlreadyInstalled(Exception):
+    pass