install-opendylan

A GitHub Action to install the Open Dylan compiler (dylan-compiler) and Deft, a workspace and package management CLI.

To install the latest Open Dylan release on Linux or macOS (Windows not yet supported):

    - uses: dylan-lang/install-opendylan@v3

To install a specific released version:

    - uses: dylan-lang/install-opendylan@v3
      with:
        tag: v2025.1.0

tag is the exact tag identifying the GitHub release, including the leading "v".

Important: This Action must be used after actions/checkout when using the default path: (i.e., the current directory) because actions/checkout deletes everything in the repo directory first.

When this Action has completed,

1. dylan-compiler, deft, and any other executable binaries distributed with the specified Open Dylan release are available on the PATH.

2. ${GITHUB_WORKSPACE}/../opendylan is a symbolic link pointing to the Open Dylan installation directory.

Note: Files are installed outside of ${GITHUB_WORKSPACE} so that they won't be deleted by the "checkout" GitHub action and so that they aren't found by the deft update command when generating registry files.

See the hello repository for the canonical example of how to use this Action.

Versions

This repository uses standard Semantic Versioning, but also provides moving tags for each major version for those who want to get the latest Open Dylan releases automatically. For example, the "v3" tag always points to the latest release with major version 3, e.g., v3 -> v3.2.1. The major version of install-opendylan only changes when the Action itself is changed incompatibly, as with normal SemVer semantics.

v3 is currently the only moving tag.