How to Integrate Mercurial with V0

The most reliable Mercurial-to-Git conversion tool is fast-export (also called hg-fast-export), which is included with the git-remote-hg package and available as a standalone script. Start by cloning or accessing your Mercurial repository locally — run hg clone your-repo-url local-hg-repo or just ensure your existing Mercurial working directory is up to date with hg pull && hg update. Next, create a new empty Git repository that will receive the converted history: mkdir my-project-git && cd my-project-git && git init. Then download fast-export from its GitHub repository (github.com/frej/fast-export) — it's a Python script that reads Mercurial history and creates Git commits. Run the conversion from inside your new Git repository: /path/to/fast-export/hg-fast-export.sh -r /path/to/local-hg-repo. The script reads all Mercurial changesets and creates equivalent Git commits with the same timestamps, author information, and commit messages. Bookmarks in Mercurial (Hg) become branches in Git, and named branches become Git refs. After conversion completes, run git checkout HEAD to update the working tree to the latest state. Verify the conversion by running git log --oneline and checking that your commit history looks correct. Compare commit counts with your Mercurial repository using hg log --template '{node} ' | wc -l to ensure nothing was lost.

1# Step 1: Install fast-export
2git clone https://github.com/frej/fast-export.git ~/fast-export
3
4# Step 2: Create a new empty Git repository
5mkdir my-project-git
6cd my-project-git
7git init
8
9# Step 3: Run the conversion (replace path with your Mercurial repo location)
10~/fast-export/hg-fast-export.sh -r /path/to/your/mercurial-repo
11
12# Step 4: Check out the converted files
13git checkout HEAD
14
15# Step 5: Verify the conversion
16git log --oneline | head -20

With your Git repository created locally from the Mercurial conversion, push it to GitHub so V0 can access it. Go to github.com/new and create a new repository — leave it completely empty (no README, no .gitignore, no license) since you'll be pushing the entire converted history. Copy the repository's HTTPS or SSH URL from GitHub. Back in your terminal, add GitHub as a remote and push: git remote add origin https://github.com/username/your-repo.git && git push -u origin main (or 'master' depending on what branch name the conversion created). If the conversion created branches with Mercurial names (like 'default'), rename the primary branch to 'main' before pushing: git branch -m default main. After pushing, verify on GitHub.com that your repository shows the complete commit history from the Mercurial conversion. Now connect V0 to this repository: open V0 at v0.dev, navigate to your project's Git panel, click 'Connect GitHub', authorize V0's GitHub OAuth app, and select your newly pushed repository. V0 can now export generated code as commits or pull requests to this repository, and Vercel will auto-deploy from GitHub pushes. Set up Vercel deployment by going to vercel.com/new, importing the GitHub repository, and configuring the build settings for your Next.js project.

1# Add GitHub remote (replace with your actual repository URL)
2git remote add origin https://github.com/username/your-project.git
3
4# Rename default branch to main if needed
5git branch -m default main
6
7# Push all history and branches
8git push -u origin main
9git push --all origin  # Push any additional branches

With your repository migrated to GitHub and connected to V0, you can now use V0's AI code generation and export it directly to your project. Open V0 at v0.dev and describe the component or page you want to generate — be specific about the visual design, the data it displays, and any interactions it needs to support. V0 generates React components with Tailwind CSS and shadcn/ui that fit naturally into Next.js App Router projects. When you're satisfied with the generated component in V0's preview, click the Git panel in V0's interface and select 'Push to GitHub'. V0 creates a new branch in your repository (named v0/main-HASH or similar), commits the generated files, and opens a pull request for your review. This pull request workflow is ideal for teams — reviewers see exactly what V0 generated before it merges to the main branch. After reviewing, merge the PR and Vercel auto-deploys the new code. For teams coming from Mercurial's bookmark-based branching model, Git's branch workflow feels similar — branches are cheap and short-lived, pull requests replace Mercurial's code review tools, and merges are the integration mechanism.