Update z to latest version (#7021)

plugins/z/z.1

@@ -22,6 +22,9 @@ OPTIONS
 \fB\-c\fR
 restrict matches to subdirectories of the current directory
 .TP
+\fB\-e\fR
+echo the best match, don't cd
+.TP
 \fB\-h\fR
 show a brief help message
 .TP
@@ -90,7 +93,8 @@ Set \fB$_Z_OWNER\fR to allow usage when in 'sudo -s' mode.
 (These settings should go in .bashrc/.zshrc before the line added above.)
 .RE
 .RS
-Install the provided man page \fBz.1\fR somewhere like \fB/usr/local/man/man1\fR.
+Install the provided man page \fBz.1\fR somewhere in your \f$MANPATH, like
+\fB/usr/local/man/man1\fR.
 .RE
 .SS
 Aging:

plugins/z/z.sh

-# Copyright (c) 2009 rupa deadwyler under the WTFPL license
+# Copyright (c) 2009 rupa deadwyler. Licensed under the WTFPL license, Version 2
 
 # maintains a jump-list of the directories you actually use
 #
@@ -21,6 +21,7 @@
 #     * z -r foo  # cd to highest ranked dir matching foo
 #     * z -t foo  # cd to most recently accessed dir matching foo
 #     * z -l foo  # list matches instead of cd
+#     * z -e foo  # echo the best match, don't cd
 #     * z -c foo  # restrict matches to subdirs of $PWD
 
 [ -d "${_Z_DATA:-$HOME/.z}" ] && {
@@ -31,9 +32,21 @@ _z() {
 
     local datafile="${_Z_DATA:-$HOME/.z}"
 
+    # if symlink, dereference
+    [ -h "$datafile" ] && datafile=$(readlink "$datafile")
+
     # bail if we don't own ~/.z and $_Z_OWNER not set
     [ -z "$_Z_OWNER" -a -f "$datafile" -a ! -O "$datafile" ] && return
 
+    _z_dirs () {
+        local line
+        while read line; do
+            # only count directories
+            [ -d "${line%%\|*}" ] && echo "$line"
+        done < "$datafile"
+        return 0
+    }
+
     # add entries
     if [ "$1" = "--add" ]; then
         shift
@@ -49,10 +62,7 @@ _z() {
 
         # maintain the data file
         local tempfile="$datafile.$RANDOM"
-        while read line; do
-            # only count directories
-            [ -d "${line%%\|*}" ] && echo $line
-        done < "$datafile" | awk -v path="$*" -v now="$(date +%s)" -F"|" '
+        _z_dirs | awk -v path="$*" -v now="$(date +%s)" -F"|" '
             BEGIN {
                 rank[path] = 1
                 time[path] = now
@@ -75,7 +85,7 @@ _z() {
                 } else for( x in rank ) print x "|" rank[x] "|" time[x]
             }
         ' 2>/dev/null >| "$tempfile"
-        # do our best to avoid clobbering the datafile in a race condition
+        # do our best to avoid clobbering the datafile in a race condition.
         if [ $? -ne 0 -a -f "$datafile" ]; then
             env rm -f "$tempfile"
         else
@@ -85,17 +95,15 @@ _z() {
 
     # tab completion
     elif [ "$1" = "--complete" -a -s "$datafile" ]; then
-        while read line; do
-            [ -d "${line%%\|*}" ] && echo $line
-        done < "$datafile" | awk -v q="$2" -F"|" '
+        _z_dirs | awk -v q="$2" -F"|" '
             BEGIN {
-                if( q == tolower(q) ) imatch = 1
                 q = substr(q, 3)
-                gsub(" ", ".*", q)
+                if( q == tolower(q) ) imatch = 1
+                gsub(/ /, ".*", q)
             }
             {
                 if( imatch ) {
-                    if( tolower($1) ~ tolower(q) ) print $1
+                    if( tolower($1) ~ q ) print $1
                 } else if( $1 ~ q ) print $1
             }
         ' 2>/dev/null
@@ -106,11 +114,12 @@ _z() {
             --) while [ "$1" ]; do shift; local fnd="$fnd${fnd:+ }$1";done;;
             -*) local opt=${1:1}; while [ "$opt" ]; do case ${opt:0:1} in
                     c) local fnd="^$PWD $fnd";;
-                    h) echo "${_Z_CMD:-z} [-chlrtx] args" >&2; return;;
-                    x) sed -i -e "\:^${PWD}|.*:d" "$datafile";;
+                    e) local echo=1;;
+                    h) echo "${_Z_CMD:-z} [-cehlrtx] args" >&2; return;;
                     l) local list=1;;
                     r) local typ="rank";;
                     t) local typ="recent";;
+                    x) sed -i -e "\:^${PWD}|.*:d" "$datafile";;
                 esac; opt=${opt:1}; done;;
              *) local fnd="$fnd${fnd:+ }$1";;
         esac; local last=$1; [ "$#" -gt 0 ] && shift; done
@@ -119,16 +128,14 @@ _z() {
         # if we hit enter on a completion just go there
         case "$last" in
             # completions will always start with /
-            /*) [ -z "$list" -a -d "$last" ] && cd "$last" && return;;
+            /*) [ -z "$list" -a -d "$last" ] && builtin cd "$last" && return;;
         esac
 
         # no file yet
         [ -f "$datafile" ] || return
 
         local cd
-        cd="$(while read line; do
-            [ -d "${line%%\|*}" ] && echo $line
-        done < "$datafile" | awk -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$fnd" -F"|" '
+        cd="$( < <( _z_dirs ) awk -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$fnd" -F"|" '
             function frecent(rank, time) {
                 # relate frequency and time
                 dx = t - time
@@ -137,19 +144,21 @@ _z() {
                 if( dx < 604800 ) return rank / 2
                 return rank / 4
             }
-            function output(files, out, common) {
+            function output(matches, best_match, common) {
                 # list or return the desired directory
                 if( list ) {
                     cmd = "sort -n >&2"
-                    for( x in files ) {
-                        if( files[x] ) printf "%-10s %s\n", files[x], x | cmd
+                    for( x in matches ) {
+                        if( matches[x] ) {
+                            printf "%-10s %s\n", matches[x], x | cmd
+                        }
                     }
                     if( common ) {
                         printf "%-10s %s\n", "common:", common > "/dev/stderr"
                     }
                 } else {
-                    if( common ) out = common
-                    print out
+                    if( common ) best_match = common
+                    print best_match
                 }
             }
             function common(matches) {
@@ -160,11 +169,9 @@ _z() {
                     }
                 }
                 if( short == "/" ) return
-                # use a copy to escape special characters, as we want to return
-                # the original. yeah, this escaping is awful.
-                clean_short = short
-                gsub(/\[\(\)\[\]\|\]/, "\\\\&", clean_short)
-                for( x in matches ) if( matches[x] && x !~ clean_short ) return
+                for( x in matches ) if( matches[x] && index(x, short) != 1 ) {
+                    return
+                }
                 return short
             }
             BEGIN {
@@ -197,8 +204,10 @@ _z() {
                 }
             }
         ')"
-        [ $? -gt 0 ] && return
-        [ "$cd" ] && cd "$cd"
+
+        [ $? -eq 0 ] && [ "$cd" ] && {
+          if [ "$echo" ]; then echo "$cd"; else builtin cd "$cd"; fi
+        }
     fi
 }
 
@@ -212,11 +221,11 @@ if type compctl >/dev/null 2>&1; then
         # populate directory list, avoid clobbering any other precmds.
         if [ "$_Z_NO_RESOLVE_SYMLINKS" ]; then
             _z_precmd() {
-                _z --add "${PWD:a}"
+                (_z --add "${PWD:a}" &)
             }
         else
             _z_precmd() {
-                _z --add "${PWD:A}"
+                (_z --add "${PWD:A}" &)
             }
         fi
         [[ -n "${precmd_functions[(r)_z_precmd]}" ]] || {
@@ -237,7 +246,7 @@ elif type complete >/dev/null 2>&1; then
     [ "$_Z_NO_PROMPT_COMMAND" ] || {
         # populate directory list. avoid clobbering other PROMPT_COMMANDs.
         grep "_z --add" <<< "$PROMPT_COMMAND" >/dev/null || {
-            PROMPT_COMMAND="$PROMPT_COMMAND"$'\n''_z --add "$(command pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null;'
+            PROMPT_COMMAND="$PROMPT_COMMAND"$'\n''(_z --add "$(command pwd '$_Z_RESOLVE_SYMLINKS' 2>/dev/null)" 2>/dev/null &);'
         }
     }
 fi