latestReleases for Linux, macOS and Windows

Project templates that keep growing after you use them.

Create a project from a versioned git template. Update it to every new version with a real three-way merge. One Rust binary, no Python.

cargo install rootstock --locked

Get started Coming from Copier

my-app

$ rootstock update
markers src/config.rs
updated to v1.3.0
$ echo $?
2
$ git diff --stat
 .github/workflows/ci.yml |  6 ++++--
 Cargo.toml               |  2 +-
 src/config.rs            | 10 ++++++----
$ sed -n 12,16p src/config.rs
<<<<<<< project
    timeout: Duration::from_secs(30),
=======
    timeout: Duration::from_secs(10), retries: 3,
>>>>>>> template v1.3.0

One binary, no runtime

Written in Rust. Linux, macOS and Windows. It needs only git on PATH.

Real updates

A three-way merge through git merge-file. Only edits that truly overlap become conflicts.

Nothing lost silently

Every case that needs a person is a conflict and exit code 2. CI only has to read the code.

How updates work

Your edits stay, the template's improvements arrive

The old and the new template versions are both rendered with the project's answers, and only the difference is merged into the project.

Basethe recorded version, your answers

Targetthe new tag, your answers

git merge-fileinto your project, path by path

Clean or conflictsexit code 0 or 2

The full rules

Compared

Copier's model, without Python

	rootstock	Copier	cargo-generate	kickstart
Runtime	single binary	Python	single binary	single binary
Templates	Jinja (minijinja)	Jinja2	Liquid	Tera
Updates generated projects	three-way	three-way	✗ creation only	✗ creation only
Conflicts as an exit code	`2`	✗ markers only	—	—

Checked in October 2026.

Coming from Copier

One command, old tags included

Converts a Copier template, a Copier-generated project, or both in one run. It writes nothing unless the whole conversion succeeds, and old template tags are read as they are.

rootstock import-copier

What it converts

Install

Get it

cargo install rootstock --locked

Every release lists the checksums in SHA256SUMS. rootstock needs git on PATH.