Just Programmer's Manual

Quiet Recipes

A recipe name may be prefixed with @ to invert the meaning of @ before each line:

@quiet:
  echo hello
  echo goodbye
  @# all done!

Now only the lines starting with @ will be echoed:

$ j quiet
hello
goodbye
# all done!

Shebang recipes are quiet by default:

foo:
  #!/usr/bin/env bash
  echo 'Foo!'

$ just foo
Foo!

Adding @ to a shebang recipe name makes just print the recipe before executing it:

@bar:
  #!/usr/bin/env bash
  echo 'Bar!'

$ just bar
#!/usr/bin/env bash
echo 'Bar!'
Bar!

just normally prints error messages when a recipe line fails. These error messages can be suppressed using the [no-exit-message] attribute. You may find this especially useful with a recipe that recipe wraps a tool:

git *args:
    @git {{args}}

$ just git status
fatal: not a git repository (or any of the parent directories): .git
error: Recipe `git` failed on line 2 with exit code 128

Add the attribute to suppress the exit error message when the tool exits with a non-zero code:

[no-exit-message]
git *args:
    @git {{args}}

$ just git status
fatal: not a git repository (or any of the parent directories): .git