feat: start of git integration

src/main/engine/GitEngine.ts

@@ -0,0 +1,182 @@
+import { simpleGit } from 'simple-git';
+
+export interface GitAvailability {
+  gitFound: boolean;
+  version?: string;
+}
+
+export interface RepoState {
+  isRepo: boolean;
+  rootPath?: string;
+  currentBranch?: string;
+  hasRemote: boolean;
+}
+
+export type GitFileStatus = 'untracked' | 'modified' | 'deleted' | 'renamed' | 'staged';
+
+export interface GitStatusFile {
+  path: string;
+  status: GitFileStatus;
+  previousPath?: string;
+}
+
+export interface GitStatusCounts {
+  untracked: number;
+  modified: number;
+  deleted: number;
+  renamed: number;
+  staged: number;
+  total: number;
+}
+
+export interface GitStatusDto {
+  files: GitStatusFile[];
+  counts: GitStatusCounts;
+}
+
+export interface GitInitResult {
+  success: boolean;
+  error?: string;
+  code?: 'git-missing' | 'git-lfs-missing' | 'init-failed' | 'remote-failed';
+}
+
+let gitEngineInstance: GitEngine | null = null;
+
+export function getGitEngine(): GitEngine {
+  if (!gitEngineInstance) {
+    gitEngineInstance = new GitEngine();
+  }
+  return gitEngineInstance;
+}
+
+export class GitEngine {
+  async checkAvailability(): Promise<GitAvailability> {
+    try {
+      const versionResult = await simpleGit().version();
+      return {
+        gitFound: true,
+        version: `${versionResult.major}.${versionResult.minor}.${versionResult.patch}`,
+      };
+    } catch {
+      return { gitFound: false };
+    }
+  }
+
+  async getRepoState(projectPath: string): Promise<RepoState> {
+    const git = simpleGit(projectPath);
+    const isRepo = await git.checkIsRepo();
+
+    if (!isRepo) {
+      return {
+        isRepo: false,
+        hasRemote: false,
+      };
+    }
+
+    const [rootPath, status] = await Promise.all([
+      git.revparse(['--show-toplevel']),
+      git.status(),
+    ]);
+
+    return {
+      isRepo: true,
+      rootPath: rootPath.trim(),
+      currentBranch: status.current ?? undefined,
+      hasRemote: Boolean(status.tracking),
+    };
+  }
+
+  async getStatus(projectPath: string): Promise<GitStatusDto> {
+    const git = simpleGit(projectPath);
+    const status = await git.status();
+
+    const files: GitStatusFile[] = [
+      ...status.not_added.map((filePath) => ({ path: filePath, status: 'untracked' as const })),
+      ...status.modified.map((filePath) => ({ path: filePath, status: 'modified' as const })),
+      ...status.deleted.map((filePath) => ({ path: filePath, status: 'deleted' as const })),
+      ...status.renamed.map((renamed) => ({
+        path: renamed.to,
+        status: 'renamed' as const,
+        previousPath: renamed.from,
+      })),
+      ...status.created.map((filePath) => ({ path: filePath, status: 'staged' as const })),
+    ];
+
+    const counts: GitStatusCounts = {
+      untracked: status.not_added.length,
+      modified: status.modified.length,
+      deleted: status.deleted.length,
+      renamed: status.renamed.length,
+      staged: status.created.length,
+      total: files.length,
+    };
+
+    return {
+      files,
+      counts,
+    };
+  }
+
+  async initializeRepo(projectPath: string, remoteUrl?: string): Promise<GitInitResult> {
+    const availability = await this.checkAvailability();
+    if (!availability.gitFound) {
+      return {
+        success: false,
+        code: 'git-missing',
+        error: 'Git executable not found. Please install Git and restart the app.',
+      };
+    }
+
+    const git = simpleGit(projectPath);
+
+    try {
+      await git.init();
+    } catch {
+      return {
+        success: false,
+        code: 'init-failed',
+        error: 'Failed to initialize repository for this project.',
+      };
+    }
+
+    try {
+      await git.raw(['lfs', 'install', '--local']);
+    } catch {
+      return {
+        success: false,
+        code: 'git-lfs-missing',
+        error: 'Git LFS executable not found. Please install Git LFS and try again.',
+      };
+    }
+
+    const imagePatterns = ['*.png', '*.jpg', '*.jpeg', '*.gif', '*.webp', '*.svg', '*.avif', '*.heic'];
+
+    for (const pattern of imagePatterns) {
+      await git.raw(['lfs', 'track', pattern]);
+    }
+
+    await git.add('.gitattributes');
+
+    const normalizedRemoteUrl = remoteUrl?.trim();
+    if (normalizedRemoteUrl) {
+      try {
+        const remotes = await git.getRemotes(true);
+        const hasOrigin = remotes.some((remote) => remote.name === 'origin');
+
+        if (hasOrigin) {
+          await git.remote(['set-url', 'origin', normalizedRemoteUrl]);
+        } else {
+          await git.addRemote('origin', normalizedRemoteUrl);
+        }
+      } catch {
+        return {
+          success: false,
+          code: 'remote-failed',
+          error: 'Failed to configure remote repository.',
+        };
+      }
+    }
+
+    return { success: true };
+  }
+}