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0.2.817 • Public • Published


Previously known as jsii-release

A unified toolchain for publishing libraries to popular package managers.


  • npm
  • PyPI
  • NuGet
  • Maven
  • Go (GitHub)


This is an npm module. You can install it using yarn add publib or npm install publib. In most cases it will be installed as a devDependency in your package.json.

This tool expects to find a distribution directory (default name is dist) which contains "ready-to-publish" artifacts for each package manager.

  • dist/js/*.tgz - npm tarballs
  • dist/python/*.whl - Python wheels
  • dist/nuget/*.nupkg - Nuget packages
  • dist/java/** - Maven artifacts in local repository structure
  • dist/go/**/go.mod - Go modules. Each subdirectory should have its own go.mod file.

Each publisher needs a set of environment variables with credentials as described below (NPM_TOKEN, TWINE_PASSWORD etc).



You can customize the distribution directory through publib DIR (the default is dist)

This command will discover all the artifacts based on the above structure and will publish them to their respective package manager.

You can also execute individual publishers:

  • publib-maven
  • publib-nuget
  • publib-npm
  • publib-pypi
  • publib-golang


Publishes all *.tgz files from DIR to npmjs, GitHub Packages or AWS CodeArtifact.

If AWS CodeArtifact is used as npm registry, a temporary npm authorization token is created using AWS CLI. Therefore, it is necessary to provide the necessary configuration settings, e.g. by passing access key ID and secret access key to this script.


npx publib-npm [DIR]

DIR is a directory with npm tarballs (*.tgz). Default is dist/js.

Options (environment variables):

Option Required Description
NPM_TOKEN Optional Registry authentication token (either npm.js publishing token or a GitHub personal access token), not used for AWS CodeArtifact
NPM_REGISTRY Optional The registry URL (defaults to "registry.npmjs.org"). Use "npm.pkg.github.com" to publish to GitHub Packages. Use repository endpoint for AWS CodeAtifact, e.g. "my-domain-111122223333.d.codeartifact.us-west-2.amazonaws.com/npm/my_repo/".
NPM_DIST_TAG Optional Registers the published package with the given dist-tag (e.g. next, default is latest)
NPM_ACCESS_LEVEL Optional Publishes the package with the given access level (e.g. public, default is restricted for scoped packages and public for unscoped packages)
AWS_ACCESS_KEY_ID Optional If AWS CodeArtifact is used as registry, an AWS access key can be spedified.
AWS_SECRET_ACCESS_KEY Optional Secret access key that belongs to the AWS access key.
AWS_ROLE_TO_ASSUME Optional If AWS CodeArtifact is used as registry, an AWS role ARN to assume before authorizing.
DISABLE_HTTPS Optional Connect to the registry with HTTP instead of HTTPS (defaults to false).


Publishes all Maven modules in the DIR to Maven Central.

Note that if you signed up at SonaType after February 2021, you need to use this URL: https://s01.oss.sonatype.org (announcement).


npx publib-maven [DIR]

DIR is a directory with a local maven layout. Default is dist/java.

Options (environment variables):

Option Required Description
MAVEN_USERNAME and MAVEN_PASSWORD Yes Username and password for maven repository. For Maven Central, you will need to Create JIRA account and then request a new project. Read the OSSRH guide for more details.
MAVEN_GPG_PRIVATE_KEY or MAVEN_GPG_PRIVATE_KEY_FILE and MAVEN_GPG_PRIVATE_KEY_PASSPHRASE Yes for Maven Central GPG private key or file that includes it. This is used to sign your Maven packages. See instructions below
MAVEN_STAGING_PROFILE_ID Yes for Maven Central Maven Central (sonatype) staging profile ID (e.g. 68a05363083174). Staging profile ID can be found in the URL of the "Releases" staging profile under "Staging Profiles" in https://oss.sonatype.org or https://s01.oss.sonatype.org if you are logged in (e.g. https://oss.sonatype.org/#stagingProfiles;68a05363083174).
MAVEN_ENDPOINT Yes for new Maven Central users URL of Nexus repository. Defaults to https://oss.sonatype.org. Use https://s01.oss.sonatype.org if you are a new user.
MAVEN_SERVER_ID No Used in maven settings for credential lookup (e.g. use github when publishing to GitHub). Defaults to ossrh for Maven Central.
MAVEN_REPOSITORY_URL No Deployment repository when not deploying to Maven Central
MAVEN_DRYRUN No Set to "true" for a dry run

How to create a GPG key?

Install GnuPG.

Generate your key:

$ gpg --full-generate-key
# select RSA only, 4096, passphrase

Your selected passphrase goes to MAVEN_GPG_PRIVATE_KEY_PASSPHRASE.

Export and publish the public key:

gpg -a --export > public.pem

Go to https://keyserver.ubuntu.com/ and submit the public key. You can use cat public.pem and copy/paste it into the "Submit Key" dialog.

Export the private key:

gpg -a --export-secret-keys <fingerprint> > private.pem

Now, either set MAVEN_GPG_PRIVATE_KEY_FILE to point to private.pem or export the private key to a single line where newlines are encoded as \n and then assign it to MAVEN_GPG_PRIVATE_KEY:

echo $(cat -e private.pem) | sed 's/\$ /\\n/g' | sed 's/\$$//'

Publish to GitHub Packages

An example GitHub Actions publish step:

- name: Publish package
  run: npx -p publib publib-maven
    MAVEN_SERVER_ID: github
    MAVEN_USERNAME: ${{ github.actor }}
    MAVEN_REPOSITORY_URL: "https://maven.pkg.github.com/${{ github.repository }}"


Publishes all *.nupkg to the NuGet Gallery.


npx publib-nuget [DIR]

DIR is a directory with Nuget packages (*.nupkg). Default is dist/dotnet.

Options (environment variables):

Option Required Description
NUGET_API_KEY Required NuGet API Key with "Push" permissions
NUGET_SERVER Optional NuGet Server URL (defaults to nuget.org)

Publish to GitHub Packages

  • Set NUGET_SERVER to https://nuget.pkg.github.com/(org or user).
  • Set NUGET_API_KEY to a token with write packages permissions.
  • Make sure the repository url in the project file matches the org or user used for the server


Publishes all *.whl files to PyPI.


npx publib-pypi [DIR]

DIR is a directory with Python wheels (*.whl). Default is dist/python.

Options (environment variables):

Option Required Description
TWINE_USERNAME Required PyPI username (register)
TWINE_PASSWORD Required PyPI password
TWINE_REPOSITORY_URL Optional The registry URL (defaults to Twine default)


Pushes a directory of golang modules to a GitHub repository.


npx publib-golang [DIR]

DIR is a directory where the golang modules are located (default is dist/go). Modules can be located either in subdirectories, (e.g 'dist/go/my-module/go.mod') or in the root (e.g 'dist/go/go.mod').

If you specify the VERSION env variable, all modules will recieve that version, otherwise a version file is expected to exist in each module directory. Repository tags will be in the following format:

  • For a module located at the root: v${module_version} (e.g v1.20.1)
  • For modules located inside subdirectories: <subdir-name>/v${module_version} (e.g my-module/v3.3.1)

Options (environment variables):

Option Required Description
GITHUB_TOKEN Required if GITHUB_USE_SSH is not specified GitHub personal access token.
GITHUB_USE_SSH Required if GITHUB_TOKEN is not specified Set any value to use SSH with deploy keys or your private SSH key. Your system must ready to use the key as publib will not set it up.
VERSION Optional Module version. Defaults to the value in the 'version' file of the module directory. Fails if it doesn't exist.
GIT_BRANCH Optional Branch to push to. Defaults to 'main'.
GIT_USER_NAME Optional Username to perform the commit with. Defaults to the git user.name config in the current directory. Fails if it doesn't exist.
GIT_USER_EMAIL Optional Email to perform the commit with. Defaults to the git user.email config in the current directory. Fails if it doesn't exist.
GIT_COMMIT_MESSAGE Optional The commit message. Defaults to 'chore(release): $VERSION'.
DRYRUN Optional Set to "true" for a dry run.

Publish to CodeArtifact for testing

This package contains the publib-ca CLI tool which is intended to use to publish packages to CodeArtifact for testing (in a pipeline, before publishing to the actual public package managers).

Use the following commands:

publib-ca create [--no-gc] [--no-login] creates a new CodeArtifact repository with a random name, with upstreams configured for all supported public package managers. By default this command runs the gc and login subcommands automatically.

publib-ca login --repo NAME [--cmd COMMAND] logs in to a CodeArtifact repository and prepares some files that configure package managers for use with this CodeArtifact repository. If --cmd is given, the command is run in an environment where all supported package managers have been configured for the given repository. Otherwise, activate these settings in the current bash shell by running source ~/.publib-ca/usage/activate.bash. This will set some environment variables and copy some files into the current directory. (Note: the CodeArtifact repository used here does not have to be created using publib-ca create. It is fine if it already existed beforehand).

publib-ca gc collects old repositories created using publib-ca create.

publib-ca publish [--repo NAME] DIRECTORY publishes all packages in the given directory to the given repository. If --repo is not given, the most recently logged-into repository is used, if the login session is still valid.


  • [X] GitHub Support: Maven
  • [X] GitHub Support: NuGet
  • [ ] CodeArtifact Support: Maven
  • [ ] CodeArtifact Support: NuGet
  • [ ] CodeArtifact Support: Python


Released under the Apache 2.0 license.




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