[zsh] Make prepend_to_path and append_to_path more interesting

Add a +e/-e argument (parsed with getopt) that conditionally exports $path.

zsh/func/append_to_path

@@ -1,13 +1,29 @@
-#!/usr/bin/env zsh
-# vim:ft=zsh:
 # Eryn Wells <eryn@erynwells.me>
+# vim:ft=zsh:
 
-function append_to_path
+append_to_path() {
-{
+    local should_export_path=1
-    if [[ -d "$1" ]]; then
+
-        path+="$1"
+    while getopts "e" opt; do
+        case $opt in
+            "e") should_export_path=1;;
+            "+e") should_export_path=0;;
+            *) >&2 echo "$0: unknown option '$opt'"
+        esac
+    done
+
+    local path_to_add=$@[$OPTIND]
+    if [[ -d "$path_to_add" ]]; then
+        path+="$path_to_add"
+
+        if (( $should_export_path )); then
             export path
         fi
+
+        return 1
+    fi
+
+    return 0
 }
 
 append_to_path "$@"

zsh/func/prepend_to_path

@@ -1,13 +1,29 @@
-#!/usr/bin/env zsh
-# vim:ft=zsh:
 # Eryn Wells <eryn@erynwells.me>
+# vim:ft=zsh:
 
-function prepend_to_path
+prepend_to_path() {
-{
+    local should_export_path=1
-    if [[ -d "$1" ]]; then
+
-        path=("$1" $path)
+    while getopts "e" opt; do
+        case $opt in
+            "e") should_export_path=1;;
+            "+e") should_export_path=0;;
+            *) >&2 echo "$0: unknown option '$opt'"
+        esac
+    done
+
+    local path_to_add=$@[$OPTIND]
+    if [[ -d "$path_to_add" ]]; then
+        path=("$path_to_add" $path)
+
+        if (( $should_export_path )); then
             export path
         fi
+
+        return 0
+    fi
+
+    return 1
 }
 
 prepend_to_path "$@"