The universal Sentry release CLI
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Craft: Universal Release Tool (And More)

Travis GitHub release npm version license

craft is a command line tool that helps to automate and pipeline package releases. It suggests, and then enforces a specific workflow for managing release branches, changelogs, artifact publishing, etc.

Table of Contents


The tool is distributed as an NPM package and can be installed via npm or yarn:

npm install -g @sentry/craft

# Or

yarn global add @sentry/craft


$ craft -h
craft <command>

  dist publish <new-version>                      🛫  Publish artifacts             [aliases: p]
  dist release <major|minor|patch|new-version>    🚢  Prepare a new release branch  [aliases: r]

  -v, --version  Show version number                                                [boolean]
  -h, --help     Show help                                                          [boolean]


  • When interacting with remote GitHub repositories, craft currently considers only one git remote: "origin"

Global Configuration

craft requires a few environment variables to be present in order to function properly.

Additional environment variables can be required when publishing to specific targets (e.g. TWINE_USERNAME and TWINE_PASSWORD for PyPI target).

craft release: Preparing a New Release

This command will create a new release branch, check the changelog entries, run a version-bumping script, and push the new branch to GitHub.

craft release <major|minor|patch|new-version>

🚢 Prepare a new release branch

  part, new-version  The version part (major, minor, patch) to increase, or the
                     version itself                                     [string]

  --no-push      Do not push the release branch       [boolean] [default: false]
  --publish      Run "publish" right after "release"  [boolean] [default: false]

craft publish: Publishing the Release

The command will find a release branch for the provided version (tag) and publish the existing artifacts from Zeus to configured targets.

craft publish <new-version>

🛫 Publish artifacts

  new-version  Version to publish                            [string] [required]

  --target, -t       Publish to this target
     [string] [choices: "brew", "github", "npm", "nuget", "pypi", "all", "none"]
                                                                [default: "all"]
  --rev, -r          Source revision to publish                         [string]
  --no-merge         Do not merge the release branch after publishing
                                                      [boolean] [default: false]
  --keep-branch      Do not remove release branch after merging it
                                                      [boolean] [default: false]
  --keep-downloads   Keep all downloaded files        [boolean] [default: false]
  --no-status-check  Do not check for build status in Zeus
                                                      [boolean] [default: false]


Let's imagine we want to release a new version of our package, and the version in question is 1.2.3.

We run release command first:

$ craft release 1.2.3

After some basic sanity checks this command creates a new release branch release/1.2.3, runs the version-bumping script (scripts/, commits the changes made by the script, and then pushes the new branch to GitHub. At this point CI systems kick in, and the results of those builds, as well as built artifacts (binaries, NPM archives, Python wheels) are gradually uploaded to Zeus.

To publish the built artifacts we run publish:

$ craft publish 1.2.3

This command will find our release branch (release/1.2.3), check the build status of the respective git revision in Zeus, and then publish available artifacts to configured targets (for example, to GitHub and NPM in the case of Craft).

Configuration File: .craft.yml

Project configuration for craft is stored in .craft.yml configuration file, located in the project root.

GitHub project

One of the required settings you need to specify is GitHub project parameters:

  owner: getsentry
  repo: craft

Pre-release Command

This command will run on your newly created release branch as part of "release" command. By default, it is set to "bash scripts/". Please refer to this section for more details.

preReleaseCommand: bash scripts/

Changelog Policies

craft can help you to maintain change logs for your projects. At the moment, craft supports only one approach ("simple") to changelog management. In this mode, craft release will remind you to add a changelog entry to the changelog file ( by default).


Option Description
changelog optional. Path to the changelog file. Defaults to
changelogPolicy optional. Changelog management mode (simple or none). Defaults to none.


changelog: CHANGES
changelogPolicy: simple

Valid changelog example:

## 1.3.5

* Removed something

## 1.3.4

* Added something

Additionally, .craft.yml is used for listing targets where you want to publish your new release.

Minimal version

It is possible to specify minimal craft version that is required to work with your configuration.


minVersion: '0.5.0'

Target Configurations

The configuration specifies which release targets to run for the repository. To run more targets, list the target identifiers under the targets key in .craft.yml.


  - name: github
  - name: npm

Per-target options

The following options can be applied to every target individually:

Name Description
includeNames optional. Regular expression: only matched files will be processed by the target.
excludeNames optional. Regular expression: the matched files will be skipped by the target. Matching is performed after testing for inclusion (via includeNames).


  - name: github
    includeNames: /^.*\.exe$/
    excludeNames: /^test.exe$/

GitHub (github)

Create a release on Github. If a Markdown changelog is present in the repository, this target tries to read the release name and description from the changelog. Otherwise, defaults to the tag name and tag's commit message.


Name Description
GITHUB_API_TOKEN Personal GitHub API token (see


Option Description
tagPrefix optional. Prefix for new git tags (e.g. "v"). Empty by default.
previewReleases optional. Automatically detect and create preview releases. true by default.


  - name: github
    tagPrefix: v
    previewReleases: false

NPM (npm)

Releases a NPM package to the public registry. This requires a package tarball generated by npm pack in the artifacts. The file will be uploaded to the registry with npm publish. This requires NPM to be authenticated with sufficient permissions to publish the package.


The npm utility must be installed on the system.

Name Description
NPM_BIN optional. Path to the npm executable. Defaults to npm


Option Description
access optional. Visibility for scoped packages: public (default) or restricted


  - name: npm
    access: restricted

Python Package Index (pypi)

Uploads source dists and wheels to the Python Package Index via twine. The source code bundles and/or wheels must be in the release assets.


The twine Python package must be installed on the system.

Name Description
TWINE_USERNAME User name for PyPI with access rights for the package
TWINE_PASSWORD Password for the PyPI user
TWINE_BIN optional. Path to twine. Defaults to twine




  - name: pypi

Homebrew (brew)

Pushes a new or updated homebrew formula to a brew tap repository. The formula is committed directly to the master branch of the tap on GitHub, therefore the bot needs rights to commit to master on that repository. Therefore, formulas on homebrew/core are not supported, yet.

The tap is configured with the mandatory tap parameter in the same format as the brew utility. A tap <org>/<name> will expand to the GitHub repository<org>/homebrew-<name>.

The formula contents are given as configuration value and can be interpolated with Mustache template syntax ({{ variable }}). The interpolation context contains the following variables:

  • version: The new version
  • revision: The tag's commit SHA
  • checksums: A map containing sha256 checksums for every release asset. Use the full filename to access the sha, e.g. checksums.MyProgram-x86


Name Description
GITHUB_API_TOKEN Personal GitHub API token (seeh ttps://


Option Description
tap The name of the homebrew tap used to access the GitHub repo
template The template for contents of the formula file (ruby code)
formula optional. Name of the formula. Defaults to the repository name
path optional. Path to store the formula in. Defaults to Formula


  - name: brew
    tap: octocat/tools     # Expands to
    formula: myproject     # Creates the file myproject.rb
    path: HomebrewFormula  # Creates the file in HomebrewFormula/
    template: >
      class MyProject < Formula
        desc "This is a test for homebrew formulae"
        homepage ""
        url "{{version}}/binary-darwin"
        version "{{version}}"
        sha256 "{{checksums.binary-darwin}}"

        def install
          mv "binary-darwin", "myproject"
          bin.install "myproject"

NuGet (nuget)

Uploads packages to NuGet via .NET Core. By default, craft publishes all packages with .nupkg extension.


The dotnet tool must be available on the system.

Name Description
NUGET_API_TOKEN NuGet personal API token (
NUGET_DOTNET_BIN optional. Path to .NET Core. Defaults to dotnet




  - name: nuget

Rust Crates (crates)

Publishes a single Rust package or entire workspace on the public crate registry ( If the workspace contains multiple crates, they are published in an order depending on their dependencies.


"cargo" must be installed and configured on the system.

Name Description
CRATES_IO_TOKEN The access token to the account
CARGO_BIN optional. Path to cargo. Defaults to cargo.




  - name: crates

Google Cloud Storage (gcs)

Uploads artifacts to a bucket in Google Cloud Storage.

The bucket paths (paths) can be interpolated using Mustache syntax ({{ variable }}). The interpolation context contains the following variables:

  • version: The new project version
  • revision: The SHA revision of the new version


Name Description
CRAFT_GCS_CREDENTIALS_PATH Local filesystem path to Google Cloud credentials (service account file)
CRAFT_GCS_CREDENTIALS_JSON Full JSON-encoded service account file

One of these two environment variables is required.


Option Description
bucket The name of the GCS bucket where artifacts are uploaded.
paths A list of path objects that represent bucket paths.
paths.path Template-aware bucket path.
paths.metadata optional Metadata for uploaded files. By default, it sets Cache-Control to "public, max-age=300".


  - name: gcs
    bucket: bucket-name
      - path: release/{{version}}/download
          cacheControl: `public, max-age=3600`
      - path: release/{{ref}}/platform/package

GitHub Pages (gh-pages)

Extracts an archive with static assets and pushes them to the specified git branch (gh-pages by default). Thus, it can be used to publish documentation or any other assets to GitHub Pages, so they will be later automatically rendered by GitHub.

By default, this target will look for an artifact named, extract it, and commit its contents to gh-pages branch.

WARNING! The destination branch will be completely overwritten by the contents of the archive.




Option Description
branch optional The name of the branch to push the changes to. gh-pages by default.
githubOwner optional GitHub project owner, defaults to the value from the global configuration.
githubRepo optional GitHub project name, defaults to the value from the global configuration.


  - name: gh-pages
    branch: gh-pages

Sentry Release Registry (registry)

The target will update the Sentry release registry repo( with the latest version of the project craft is used with. The release registry repository will be checked out locally, and then the new version file will be created there, along with the necessary symbolic links.

Two package types are supported: "sdk" and "app". Type "sdk" means that the package is uploaded to one of the public registries (PyPI, NPM, Nuget, etc.), and that the corresponding package directory can be found inside "packages" directory of the release regsitry. Type "app" indicates that the package's version files are located in "apps" directory of the registry.




Option Description
type Type of the package: can be "sdk" or "app".
config.canonical Canonical name of the package that includes package registry name (e.g. NPM, PyPI) and the full package name.
urlTemplate optional URL template that will be used to generate download links for "app" package type.
linkPrereleases optional Update package versions even if the release is a preview release, "false" by default.


  - name: registry
    type: sdk
      canonical: "npm:@sentry/browser"

  - name: registry
    type: app
    urlTemplate: "{{version}}/{{file}}"
      canonical: "npm:@sentry/browser"

Cocoapods (cocoapods)

Pushes a new podspec to the central cocoapods repository. The Podspec is fetched from the Github repository with the revision that is being released. No release assets are required for this target.


The cocoapods gem must be installed on the system.

Name Description
COCOAPODS_TRUNK_TOKEN The access token to the cocoapods account
COCOAPODS_BIN optional. Path to pod executable.


Option Description
specPath Path to the Podspec file in the repository


  - name: cocoapods
    specPath: MyProject.podspec

Integrating Your Project with craft

Here is how you can integrate your GitHub project with craft:

  • Enable your project in Zeus:
  • Configure your CI systems (Travis, AppVeyor, etc.) to send build artifacts to Zeus
    • Allow building release branches (their names follow pattern release/VERSION)
    • Add ZEUS_HOOK_BASE as protected to CI environment
  • Add .craft.yml configuration file to your project
    • List there all the targets you want to publish to
    • Configure additional options (changelog management policy, tag prefix, etc.)
  • Add a pre-release script to your project.
  • Get various configuration tokens
  • Start releasing!

Pre-release (Version-bumping) Script: Conventions

Among other actions, craft release runs an external project-specific command or script that is responsible for version bumping. By default, this script should be located at the following path: scripts/ (relative to the project root). The command can be configured by specifying preReleaseCommand configuration option in craft.yml.

The following requirements are on the script interface and functionality:

  • The script must accept at least two arguments. Craft will pass the following values as the last two arguments (in the specified order): the old ("from") version, and the second one is the new ("to") version.
  • The script must replace all relevant occurrences of the old version string with the new one.
  • The script must not commit the changes made.
  • The script must not change the state of the git repository (e.g. changing branches)


### Example of a version-bumping script for an NPM project.
### Located at: scripts/
set -eux

# Do not tag and commit changes made by "npm version"
export npm_config_git_tag_version=false
npm version "${NEW_VERSION}"


Logging level

Logging level for craft can be configured via setting CRAFT_LOG_LEVEL environment variable.

Accepted values are: debug, success (default), info, warn, error.

Dry-run mode

Dry-run mode can be enabled via setting DRY_RUN environment variable to any truthy value (any value other than unset, "", 0, false and no).

In dry-run mode no destructive actions will be performed (creating branches, pushing tags, committing files, etc.)


craft obviously uses craft for preparing and publishing new releases!