Include Directives
The !include directive, currently unstable, can be used to include the
verbatim text of another file.
If you have the following justfile:
!include foo/bar.just
a: b
@echo A
And the following text in foo/bar.just:
b:
@echo B
foo/bar.just will be included in justfile and recipe b will be defined:
$ just --unstable b
B
$ just --unstable a
B
A
The !include directive path can be absolute or relative to the location of
the justfile containing it. !include directives must appear at the beginning
of a line.
Justfiles are insensitive to order, so included files can reference variables
and recipes defined after the !include directive.
!include directives are only processed before the first non-blank,
non-comment line.
Included files can themselves contain !include directives, which are
processed recursively.