Pick a git flavor and assign it to $_Z_AWK

Author: agkozak

z.sh

@@ -23,14 +23,18 @@
 #     * z -l foo  # list matches instead of cd
 #     * z -c foo  # restrict matches to subdirs of $PWD
 
-case $(uname -a) in
-  SunOS*) awk() { nawk "$@"; } ;;
-esac
-
 [ -d "${_Z_DATA:-$HOME/.z}" ] && {
     echo "ERROR: z.sh's datafile (${_Z_DATA:-$HOME/.z}) is a directory."
 }
 
+_z_pick_awk_flavor() {
+  if [ -z "$_Z_AWK" ]; then
+    local awk; for awk in mawk gawk original-awk nawk awk; do
+      command -v $awk > /dev/null 2>&1 && _Z_AWK=$awk && break
+    done
+  fi
+}
+
 _z() {
 
     local datafile="${_Z_DATA:-$HOME/.z}"
@@ -65,7 +69,7 @@ _z() {
 
         # maintain the data file
         local tempfile="$datafile.$RANDOM"
-        _z_dirs | awk -v path="$*" -v now="$(date +%s)" -F"|" '
+        _z_dirs | $_Z_AWK -v path="$*" -v now="$(date +%s)" -F"|" '
             BEGIN {
                 rank[path] = 1
                 time[path] = now
@@ -98,7 +102,7 @@ _z() {
 
     # tab completion
     elif [ "$1" = "--complete" -a -s "$datafile" ]; then
-        _z_dirs | awk -v q="$2" -F"|" '
+        _z_dirs | $_Z_AWK -v q="$2" -F"|" '
             BEGIN {
                 q = substr(q, 3)
                 if( q == tolower(q) ) imatch = 1
@@ -138,7 +142,7 @@ _z() {
         [ -f "$datafile" ] || return
 
         local cd
-        cd="$( < <( _z_dirs ) awk -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$fnd" -F"|" '
+        cd="$( < <( _z_dirs ) $_Z_AWK -v t="$(date +%s)" -v list="$list" -v typ="$typ" -v q="$fnd" -F"|" '
             function frecent(rank, time) {
                 # relate frequency and time
                 dx = t - time
@@ -214,6 +218,8 @@ _z() {
     fi
 }
 
+_z_pick_awk_flavor
+
 alias ${_Z_CMD:-z}='_z 2>&1'
 
 [ "$_Z_NO_RESOLVE_SYMLINKS" ] || _Z_RESOLVE_SYMLINKS="-P"