just

Original：🇺🇸 English
Translated

Reference for `just`, the command runner. Use when working in a project with a `justfile` or when the user mentions `just` or `justfile`.

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Sourcecasey/just
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NPX Install

npx skill4agent add casey/just just

Tags

Translated version includes tags in frontmatter
justjustfilecommand-runnercli-tooltask-automation

SKILL.md Content

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Just

Discovery

  • just --dump
    Print justfile
  • just --evaluate
    Print variable values
  • just --help
    Print detailed command-line syntax help
  • just --list
    Print recipes with descriptions
  • just --show <RECIPE>
    Print recipe source
  • just --summary
    Print recipes without descriptiosn

Execution

  • just
    Run default recipe
  • just <RECIPE>
    Run specific recipe
  • just <RECIPE> <ARG1> <ARG2
    Run recipe with arguments

Syntax

just
executable := 'main'

# compile main.c
compile:
  cc main.c -o {{ executable }}

# run main
run: compile
  ./{{ executable }}

# run test
test name: compile
  ./bin/test {{ name }}

# start webserver
serve port='8080':
  python -m http.server {{port}}

# publish current tag
publish:
  #!/usr/bin/env bash
  set -euxo pipefail
  tag=`git describe --tags --exact-match`
  ./bin/check-tag $tag
  git push origin $tag

Notes

The comment proceeding a recipe is used as its doc-comment, and included in 
just --list
.
By default, each line of a recipe runs in a fresh shell. Recipes whose bodies start with 
#!
are written to a file and executed as a script.
Commonly used commands and scripts should be turned into 
just
recipes.