drop `dirname` in favor of native Bash strings (2 of 2)

Convert `var=${dirname $filename)` to `var="${filename%/*}`, everywhere except *plugin/z_autoenv*.

completion/available/gradle.completion.bash

@@ -30,7 +30,7 @@ __gradle-set-project-root-dir() {
             project_root_dir=$dir
             return 0
         fi
-        dir="$(dirname "$dir")"
+        dir="${dir%/*}"
     done
     return 1
 }

plugins/available/extract.plugin.bash

@@ -35,8 +35,8 @@ End-Of-Usage
             continue
         fi
 
-        local -r filename=$(basename -- $1)
+		local -r filename=${1##*/}
-        local -r filedirname=$(dirname -- $1)
+		local -r filedirname=${1%/*}
         local targetdirname=$(sed 's/\(\.tar\.bz2$\|\.tbz$\|\.tbz2$\|\.tar\.gz$\|\.tgz$\|\.tar$\|\.tar\.xz$\|\.txz$\|\.tar\.Z$\|\.7z$\|\.nupkg$\|\.zip$\|\.war$\|\.jar$\)//g' <<< $filename)
         if [ "$filename" = "$targetdirname" ]; then
             # archive type either not supported or it doesn't need dir creation

plugins/available/gradle.plugin.bash

@@ -12,7 +12,7 @@ function gw() {
       result="${curr_path}/${file}"
       break
     else
-      curr_path=$(dirname "${curr_path}")
+      curr_path="${curr_path%/*}"
     fi
   done
 

plugins/available/python.plugin.bash

@@ -21,7 +21,7 @@ function pyedit() {
         return -1
 
     elif [[ $xpyc == *__init__.py* ]]; then
-        xpydir=`dirname $xpyc`;
+        xpydir=${xpyc%/*};
         echo "$EDITOR $xpydir";
         $EDITOR "$xpydir";
     else

themes/base.theme.bash

@@ -352,7 +352,7 @@ function get_hg_root {
 			return
 		fi
 
-		CURRENT_DIR=$(dirname "$CURRENT_DIR")
+		CURRENT_DIR="${CURRENT_DIR%/*}"
 	done
 }