Taskfile.yml

# https://taskfile.dev/installation/
# https://taskfile.dev/usage/
# https://taskfile.dev/styleguide/
version: '3'

vars:
  CONDA_PREFIX: ./venv
  CONDA_ENV_FILE: environment.yml
  PIP_REQ_FILE: requirements.txt

tasks:
  default:
    desc: build or update venv
    cmds:
      - task: venv:build
    silent: true

  venv:build:
    desc: build conda venv when config file updated
    cmds:
      - task: venv:inner-build
      - task: venv:config-vars
      - task: venv:usage
    silent: true

  venv:usage:
    desc: help message of venv
    cmds:
      - conda env list --json
      - echo "environment variables:"
      - conda env config vars list -p {{.CONDA_PREFIX}}
      - echo "continue to use commands below:"
      - echo "conda activate {{.CONDA_PREFIX}} (activate conda environment)"
      - echo "conda deactivate (deactivate conda environment)"
      - echo "task --force (force rebuild venv)"
      - echo "task --list (show all tasks)"
    silent: true

  venv:inner-build:
    internal: true
    silent: true
    cmds:
      - test ! -d {{.CONDA_PREFIX}} || conda env update -f {{.CONDA_ENV_FILE}} -p {{.CONDA_PREFIX}}
      - test -d {{.CONDA_PREFIX}} || conda env create -f {{.CONDA_ENV_FILE}} -p {{.CONDA_PREFIX}}
      - touch {{.CONDA_PREFIX}}
    status:
      - test {{.CONDA_PREFIX}} -nt {{.CONDA_ENV_FILE}}
      - test {{.CONDA_PREFIX}} -nt {{.PIP_REQ_FILE}}

  venv:config-vars:
    internal: true
    cmds:
      - conda env config vars set PYTHONPATH={{.PYTHONPATH}} -p {{.CONDA_PREFIX}}
    vars:
      PYTHONPATH:
        sh: pwd

  venv:clean:
    desc: remove conda venv
    silent: true
    cmds:
      - conda env remove -p {{.CONDA_PREFIX}}
      - rm -rf {{.CONDA_PREFIX}}
      - echo "conda env list after remove venv"
      - conda env list --json

  server:run:
    desc: start server app
    cmd: python scripts/main.py