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docs: Expand path variable section

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Fabian Homborg 2021-12-01 19:03:40 +01:00
parent fbac70ab38
commit be43e95ac9
1 changed files with 10 additions and 0 deletions

10
doc_src/language.rst

@ -1246,6 +1246,16 @@ PATH variables act as normal lists, except they are implicitly joined and split
echo "$MYPATH"
# 1:2:3:4:5
Path variables will also be exported in the colon form, so ``set -x MYPATH 1 2 3`` will have external commands see it as ``1:2:3``.
::
> set -gx MYPATH /bin /usr/bin /sbin
> env | grep MYPATH
MYPATH=/bin:/usr/bin:/sbin
This is for compatibility with other tools. Unix doesn't have variables with multiple elements, the closest thing it has are colon-lists like :envvar:`PATH`. For obvious reasons this means no element can contain a ``:``.
Variables can be marked or unmarked as PATH variables via the ``--path`` and ``--unpath`` options to ``set``.
.. _variables-special: