z: refresh $RANDOM's value outside subshell

This change references `$RANDOM` outside the subshell to refresh it for the next subshell invocation. Otherwise, subsequent runs of the function get the same value and, if run simultaneously, they may clobber each others' temp .z files. This is due to how zsh distributes RANDOM values when running inside a subshell: subshells that reference RANDOM will result in identical pseudo-random values unless the value of RANDOM is referenced or seeded in the parent shell in between subshell invocations See: http://zsh.sourceforge.net/Doc/Release/Parameters.html#index-RANDOM

z: refresh $RANDOM's value outside subshell
052493b1 · Marc Cornellà · 851899e5 · 052493b1
Commit 052493b1 authored Feb 06, 2019 by Marc Cornellà
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z.sh plugins/z/z.sh +6 -0

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--- a/plugins/z/z.sh
+++ b/plugins/z/z.sh
@@ -222,10 +222,16 @@ if type compctl >/dev/null 2>&1; then
        if [ "$_Z_NO_RESOLVE_SYMLINKS" ]; then
            _z_precmd() {
                (_z --add "${PWD:a}" &)
+                # Reference $RANDOM to refresh its value inside the subshell
+                # Otherwise, multiple runs get the same value
+                : $RANDOM
            }
        else
            _z_precmd() {
                (_z --add "${PWD:A}" &)
+                # Reference $RANDOM to refresh its value inside the subshell
+                # Otherwise, multiple runs get the same value
+                : $RANDOM
            }
        fi
        [[ -n "${precmd_functions[(r)_z_precmd]}" ]] || {