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Document PATH variables

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ridiculousfish 2018-10-19 17:53:03 -07:00
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@ -861,6 +861,24 @@ env | grep smurf
`fish` automatically creates arrays from all environment variables whose name ends in PATH, by splitting them on colons. Other variables are not automatically split.
\subsection variables-path PATH variables
Path variables are a special kind of variable used to support colon-delimited path lists including PATH, CDPATH, MANPATH, PYTHONPATH, etc. All variables that end in `PATH` (case-sensitive) become PATH variables.
PATH variables act as normal arrays, except they are are implicitly joined and split on colons.
\fish
set MYPATH 1 2 3
echo "$MYPATH"
<outp># 1:2:3</outp>
set MYPATH "$MYPATH:4:5"
echo $MYPATH
# 1 2 3 4 5
echo "$MYPATH"
<outp># 1:2:3:4:5</outp>
\endfish
Variables can be marked or unmarked as PATH variables via the `--path` and `--unpath` options to `set`.
\subsection variables-special Special variables
The user can change the settings of `fish` by changing the values of certain variables.