just 命令

常用示例

说明

just is a command runner similar to make but focused on running project-specific commands rather than building targets. It uses a justfile (similar to Makefile) to define recipes - named sets of commands. Recipes are defined with a name, optional parameters, and body of shell commands. Unlike make, just doesn't track file dependencies or timestamps; it simply runs the specified commands. This makes it ideal for task automation, development workflows, and project scripts. Variables can be defined and used with {{variable}} syntax. Environment variables are accessible, and recipes can export variables. Conditionals, default values, and error handling are supported. Just supports multiple shells (sh, bash, powershell, python, etc.) per recipe via shebang-like syntax. Recipes can have dependencies (other recipes to run first), and private recipes (prefixed with _) are hidden from --list. Cross-platform support means justfiles work on Linux, macOS, and Windows. The tool is fast (written in Rust) and has no dependencies.

参数

-l, --list

List available recipes.

-n, --dry-run

Print what would be executed without running.

--evaluate

Evaluate and print all variables.

-f, --justfile _path_

Use specified justfile.

-d, --working-directory _path_

Run from specified directory.

--set _var value_

Override variable value.

--chooser _program_

Use program to select recipe interactively.

--choose

Select recipe with chooser.

-s, --show _recipe_

Show recipe definition.

--summary

List recipes one per line.

--dump

Print justfile in canonical form.

--fmt

Format justfile.

--check

Check justfile for errors.

-q, --quiet

Suppress echoing of recipe lines.

-v, --verbose

Verbose output.

--color _when_

Color output: auto, always, never.

--shell _shell_

Shell to use for recipes.