Replace fstag with xdgtag

xdgtag uses user.xdg.tags, supported by dolphin and other applications.
<https://xdg.freedesktop.narkive.com/f7GQ2EpR/commonextendedattributes-xattr-tags>

.config/zsh/completions/_xdgtag

@@ -1,4 +1,4 @@
-#compdef fstag
+#compdef xdgtag
 
 local line state
 
@@ -10,7 +10,7 @@ case ${state} in
         ;;
     tags)
         if [[ ${line[1]} == "del" ]]; then
-            local tags=$(fstag list ${line[2]})
+            local tags=$(xdgtag list ${line[2]})
             [[ -n ${tags} ]] && _values 'tags' ${(@s/,/)tags}
         fi
         ;;

.config/zsh/functions/fstag

@@ -3,54 +3,18 @@
 
 setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
 
-zmodload zsh/zutil
-local -a o_help=()
-zparseopts -D -K -- h=o_help
-if [[ ${#o_help} -ne 0 || ! -v 2 ]] || [[ ${1} != "list" && ! -v 3 ]]; then
-    ret=$(( ${#o_help} ^ 1 ))
-    print -u $(( 1 + ${ret} )) "usage: ${0} [-h] list|add|del|find <FILE|DIR> [TAG] …"
-    return ${ret}
-fi
-local cmd=${1}
-shift
-local file=${1}
-shift
-[[ -v 1 ]] && local -a tags=(${@})
+print -u 2 \
+'DEPRECATED, use xdgtag instead.
+See <https://xdg.freedesktop.narkive.com/f7GQ2EpR/commonextendedattributes-xattr-tags>
 
+To convert your files from user.fstag.tags to user.xdg.tags, run (in Zsh):
 zmodload zsh/attr
-local namespace="user.fstag"
-local _taglist=$(zgetattr ${file} ${namespace}.tags 2> /dev/null)
-local -a taglist=(${(@s/,/)_taglist})
-unset _taglist
-
-case ${cmd} in
-    list)
-        [[ -n ${taglist} ]] && print ${(j/,/)taglist}
-        ;;
-    add)
-        taglist+=(${tags})
-        taglist=(${(u)taglist})
-        zsetattr ${file} ${namespace}.tags ${(j/,/)taglist}
-        ;;
-    del)
-        for tag in ${(@)tags}; do
-            taglist=(${(@)taglist:#${tag}})
-        done
-        zsetattr ${file} ${namespace}.tags "${(j/,/)taglist}"
-        ;;
-    find)
-        setopt LOCAL_OPTIONS GLOB
-        for current_file in ${file}/**/*; do
-            local _taglist=$(${0} list ${current_file})
-            local -a current_tags=(${(@s/,/)_taglist})
-            unset _taglist
-            local match=yes
-            for tag in ${(@)tags}; do
-                (( ${current_tags[(I)${tag}]} )) || match=no
-            done
-            if [[ ${match} == yes ]]; then
-                print ${current_file}: ${(j/,/)current_tags}
+for file in **/*; do
+  local tags=$(zgetattr ${file} user.fstag.tags 2> /dev/null)
+    if [[ -n ${tags} ]]; then
+        zsetattr ${file} user.xdg.tags ${tags}
+        zdelattr ${file} user.fstag.tags
     fi
-        done
-        ;;
-esac
+done'
+
+return 1

.config/zsh/functions/xdgtag

@@ -0,0 +1,56 @@
+#!/usr/bin/env zsh
+# tag files using extended attributes
+
+setopt LOCAL_OPTIONS ERR_RETURN NO_UNSET PIPE_FAIL
+
+zmodload zsh/zutil
+local -a o_help=()
+zparseopts -D -K -- h=o_help
+if [[ ${#o_help} -ne 0 || ! -v 2 ]] || [[ ${1} != "list" && ! -v 3 ]]; then
+    ret=$(( ${#o_help} ^ 1 ))
+    print -u $(( 1 + ${ret} )) "usage: ${0} [-h] list|add|del|find <FILE|DIR> [TAG] …"
+    return ${ret}
+fi
+local cmd=${1}
+shift
+local file=${1}
+shift
+[[ -v 1 ]] && local -a tags=(${@})
+
+zmodload zsh/attr
+local attribute="user.xdg.tags"
+local _taglist=$(zgetattr ${file} ${attribute} 2> /dev/null)
+local -a taglist=(${(@s/,/)_taglist})
+unset _taglist
+
+case ${cmd} in
+    list)
+        [[ -n ${taglist} ]] && print ${(j/,/)taglist}
+        ;;
+    add)
+        taglist+=(${tags})
+        taglist=(${(u)taglist})
+        zsetattr ${file} ${attribute} ${(j/,/)taglist}
+        ;;
+    del)
+        for tag in ${(@)tags}; do
+            taglist=(${(@)taglist:#${tag}})
+        done
+        zsetattr ${file} ${attribute} "${(j/,/)taglist}"
+        ;;
+    find)
+        setopt LOCAL_OPTIONS GLOB
+        for current_file in ${file}/**/*; do
+            local _taglist=$(${0} list ${current_file})
+            local -a current_tags=(${(@s/,/)_taglist})
+            unset _taglist
+            local match=yes
+            for tag in ${(@)tags}; do
+                (( ${current_tags[(I)${tag}]} )) || match=no
+            done
+            if [[ ${match} == yes ]]; then
+                print ${current_file}: ${(j/,/)current_tags}
+            fi
+        done
+        ;;
+esac