Option to specify a custom interpreter

[aucampia]

I have had a couple of situations where I wanted to run commands with a different interpreter than mvdan.cc/sh/v3/cmd/gosh. Two examples are:

Small python snippets that I want executed with the python interpreter:

tasks:
  _rimraf:
    # This task is a utility task for recursively removing directories, it is
    # similar to rm -rf but not identical and it should work wherever there is
    # a python interpreter. The name is inspired by
    # <https://www.npmjs.com/package/rimraf>.
    - cmd: |
        {{.PYTHON}} -c '
        from pathlib import Path;
        import sys, shutil;
        for path in sys.argv[1:]:
          if Path(path).exists():
            sys.stderr.write(f"removing {path}\n")
            shutil.rmtree(path, ignore_errors=True)
        ' {{.RIMRAF_TARGET}}

Commands I want to execute on a LXD container:

tasks:
  nomad:clean:jobs:
    desc: Delete all Nomad jobs
    cmds:
      - cmd: lxc exec -t kron-cluster-sandbox -- bash -l -c {{ .CMD | shellQuote }}
        ignore_error: true
    vars:
      CMD: |
        set -x -euo pipefail

        nomad job inspect -json | jq -r ".[].ID" | xargs -I{} -t nomad job stop -yes {}
        nomad system gc

I feel these two cases would be a bit more elegant if I could specify the interpreter separately from the command without having to pass the command as either an environment variable or a shell escaped string.

This is a rather minor request though, clearly there are serviceable workarounds that get the job done, but having something similar to the interpreter setting from poethepoet may help.

[Hades32]

this would also help with using task on Windows so I could simply force it to use Bash instead of PowerShell

[pd93]

@aucampia Thanks for opening this. I couldn't find the issue when you asked on Discord, but now that I've had more time to search, I think this is a duplicate of #448. I'm going to post my response over there and close this. If you and @Hades32 could add a 👍 and any comments over there too, that would help keep everything together.