Github action that parses .tool-versions into the environment.

      - name: Parse .tool-versions
        uses: wistia/[email protected]
        with:
          uppercase: 'true'
          prefix: 'tool_version_'
          filename: '.tool-versions'

      # Sometime later in the same job...
      - name: Set up Node.js environment
        uses: actions/setup-node@v3
        with:
          node-version: ${{ env.TOOL_VERSION_NODEJS }}

This command reads .tool-versions (or an alternate text file provided in filename input), ignores comments with leading # and outputs each tool name (with or without optional prefix/postfix) into GITHUB_ENV. All inputs are optional; by default, tool names & prefix/postfix are uppercased.

set this to any string besides 'true' to use snake_case instead of MACRO_CASE

use to control what is prepended to the tool name (eg. tool_version_ w/ ruby would emit TOOL_VERSION_RUBY)

use to control what is appended to the tool name (eg. _tool_version w/ ruby would emit RUBY_TOOL_VERSION)

The filename read from; this can be a path