🚀 Automatic crate publishing done right
Rust Shell Makefile
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Build Status

The purpose of this tool is to help people to publish crates following the semver specification.

Right now if you're building a new crate publishing new versions includes a high amount of work. You need to decide if the new version will be either a new Major, Minor or Patch version. If that decision is made, the next step is to write a changelog with all the things changed. Then increase the version in Cargo.toml. Make a commit and a new tag for the new version and lastly publish it to crates.io. If you need to repeat these steps every time, chances are high you make mistakes. semantic-rs automates all these steps for you so you can focus more on developing new features instead.


  • Install semantic-rs on your machine.
  • Follow the Angular.js commit message conventions when you commit changes to your repository
  • When you're done with development, run semantic-rs
  • Based on your changes it determines the next version number, generates a changelog, commits it and creates a new tag
  • It also increases the version number in Cargo.toml (also committed)
  • Runs cargo package for you
  • Creates a release on GitHub
  • Publishes the new version to crates.io
  • Done 🚀



You need the following data beforehand:

Run it

semantic-rs depends on some data being passed in via environment variables. In our examples we specify those variables explicitly but if you run semantic-rs frequently you may want to configure those in your shell's configuration file.

Setting GIT_COMITTER_NAME and GIT_COMMITTER_EMAIL is optional. If you omit those, we default to the settings from your (global) git configuration.

If you run semantic-rs without any arguments, it operates on your current working directory:

$ export GIT_COMMITTER_NAME=<Your name>
$ export GIT_COMMITTER_EMAIL=<Your email>
$ semantic-rs

By default it runs in dry-run mode. This means it doesn't perform changes automatically. You see which steps would be performed and also the resulting changelog.

To perform the changes, pass -w as an argument:

$ semantic-rs -w yes

This performs the following operations:

  • Create or update Changelog.md containing everything that changed
  • Create a new commit containing the following changes:
    • Changelog.md
    • An updated Cargo.toml with the new version number
  • Create a new annotated git tag pointing to the last commit created recently and including the Changelog for the new version
  • A new version published to crates.io
  • A new release on GitHub
  • Push the new commit and tag to GitHub

Running the tests

To run semantic-rs's tests:

  • unit tests: cargo test.
  • integration tests: ./tests/integration/run-locally.sh.



  • cmake
  • OpenSSL development package
    • Ubuntu: libssl-dev
    • Mac Homebrew: openssl
  • Rust 1.5 or later

For OS X > 10.10

Note that since OS X 10.11 Apple doesn't ship development headers for OpenSSL anymore. In order to get it working, you need to run cargo with these variables configured:

OPENSSL_INCLUDE_DIR=`brew --prefix openssl`/include \
OPENSSL_LIB_DIR=`brew --prefix openssl`/lib \
cargo build

Build locally

Clone this project:

$ git clone git@github.com:semantic-rs/semantic-rs.git

As a test project you can use this one: https://github.com/badboy/test-project.

Clone it as well:

$ git clone https://github.com/badboy/test-project.git

In your top level directory there should be now the following two folders:

$ ls -l

Change into the semantic-rs folder and run cargo build. Then you can run semantic-rs against the test project:

$ cargo run -- -p ../test-project
   Compiling semantic-rs v0.1.0 (file:///Users/janschulte/projects/semantic-rs/semantic-rs)
     Running `target/debug/semantic-rs -p ../test-project`
semantic.rs 🚀
Analyzing your repository
Current version: 2.0.3
Analyzing commits
Commits analyzed. Bump would be Minor
New version would be: 2.1.0
Would write the following Changelog:
## v2.1.0 (2016-07-03)

#### Features

*   Math mode ([24afa46f](24afa46f))

#### Bug Fixes

*   Into the void ([9e54f4bf](9e54f4bf))

Would create annotated git tag

Since -w yes was not passed, it only prints out what it would do. Note that if you run it on your local machine the output may differ.

Run semantic-rs in CI environment

Make sure to set the CI=true environment variable to disable dry-run mode.


Bug reports and pull requests are welcome on GitHub. You can find more information about contributing in the CONTRIBUTING.md. This project is intended to be a safe, welcoming space for collaboration and discussion, and contributors are expected to adhere to the Contributor Covenant code of conduct.


This project is licensed under the MIT license.