Use Calcit in CI environment

[tiye]

For "CI" I mostly mean GitHub actions, since I haven't tested on other environments. Since Calcit is built via Rust into a binary, it's mainly setting up the binary in $PATH to run cr command. And by now another command bundle_calcit is also added, might be available soon.

The binaries for Linux are uploaded to http://bin.calcit-lang.org/linux/ .

To set up the command, there's an example at: https://github.com/calcit-lang/respo-calcit-workflow/blob/master/.github/workflows/upload.yaml#L15

    # GitHub Actions needs this configure to allow insecure behaviors
    - name: ACTIONS_ALLOW_UNSECURE_COMMANDS
      id: ACTIONS_ALLOW_UNSECURE_COMMANDS
      run: echo 'ACTIONS_ALLOW_UNSECURE_COMMANDS=true' >> $GITHUB_ENV
     
    # then, put executable into $PATH
    - name: add cr
      run: |
        mkdir -p $GITHUB_WORKSPACE/bin
        wget -O $GITHUB_WORKSPACE/bin/cr http://bin.calcit-lang.org/linux/cr
        chmod +x $GITHUB_WORKSPACE/bin/cr
        echo "::add-path::$GITHUB_WORKSPACE/bin"

You may also need dependencies. Currently Calcit dependencies are maintained in a very naive way of folders inside ~/.config/calcit/modules/. They are loaded via file paths. So just use git, or even with tags:

    - name: "prepare modules"
      run: >
        mkdir -p ~/.config/calcit/modules/ && cd ~/.config/calcit/modules/
        && git clone https://github.com/calcit-lang/lilac.git
        && git clone https://github.com/calcit-lang/memof.git
        && git clone https://github.com/Respo/respo.calcit.git
        && git clone https://github.com/Respo/reel.calcit.git --branch 0.5.3
        && git clone https://github.com/Respo/respo-markdown.calcit.git
        && git clone https://github.com/Respo/respo-ui.calcit.git

Now you would be able to use cr command as in your own POSIX operating system.