bacman: bashify using [[ ]] and (( ))

Another style change.  The [[ expression ]] form is particularly
cleaner, safer and more powerful than the [ expression ] form.

Signed-off-by: lolilolicon <lolilolicon@gmail.com>

contrib/bacman.in

@@ -26,23 +26,23 @@ readonly progver="0.2.1"
 #
 # User Friendliness
 #
-function usage(){
+usage() {
 	echo "This program recreates a package using pacman's db and system files"
 	echo "Usage:   $progname <installed package name>"
 	echo "Example: $progname kernel26"
 }
 
-if [ $# -ne 1 ] ; then
+if (( $# != 1 )); then
 	usage
 	exit 1
 fi
 
-if [ "$1" = "--help" -o "$1" = "-h" ] ; then
+if [[ $1 == "--help" || $1 == "-h" ]]; then
 	usage
 	exit 0
 fi
 
-if [ "$1" = "--version" -o "$1" = "-v" ]; then
+if [[ $1 == "--version" || $1 == "-v" ]]; then
 	echo "$progname version $progver"
 	echo "Copyright (C) 2008 locci"
 	exit 0
@@ -51,11 +51,11 @@ fi
 #
 # Fakeroot support
 #
-if [ $EUID -gt 0 ]; then
-	if [ -f /usr/bin/fakeroot ]; then
+if (( EUID )); then
+	if [[ -f /usr/bin/fakeroot ]]; then
 		echo "Entering fakeroot environment"
 		export INFAKEROOT="1"
-		/usr/bin/fakeroot -u -- $0 $1
+		/usr/bin/fakeroot -u -- "$0" "$@"
 		exit $?
 	else
 		echo "WARNING: installing fakeroot or running ${progname} as root is required to"
@@ -67,7 +67,7 @@ fi
 #
 # Setting environmental variables
 #
-if [ ! -r @sysconfdir@/pacman.conf ]; then
+if [[ ! -r @sysconfdir@/pacman.conf ]]; then
 	echo "ERROR: unable to read @sysconfdir@/pacman.conf"
 	exit 1
 fi
@@ -75,13 +75,13 @@ fi
 eval $(awk '/DBPath/ {print $1$2$3}' @sysconfdir@/pacman.conf)
 pac_db="${DBPath:-@localstatedir@/lib/pacman/}/local"
 
-if [ ! -r @sysconfdir@/makepkg.conf ]; then
+if [[ ! -r @sysconfdir@/makepkg.conf ]]; then
 	echo "ERROR: unable to read @sysconfdir@/makepkg.conf"
 	exit 1
 fi
 
 source "@sysconfdir@/makepkg.conf"
-if [ -r ~/.makepkg.conf ]; then
+if [[ -r ~/.makepkg.conf ]]; then
 	source ~/.makepkg.conf
 fi
 
@@ -96,12 +96,12 @@ pkg_namver="${pkg_dir##*/}"
 #
 # Checks everything is in place
 #
-if [ ! -d "$pac_db" ] ; then
+if [[ ! -d $pac_db ]]; then
 	echo "ERROR: pacman database directory ${pac_db} not found"
 	exit 1
 fi
 
-if [ ! -d "$pkg_dir" ] ; then
+if [[ ! -d $pkg_dir ]]; then
 	echo "ERROR: package ${pkg_name} not found in pacman database"
 	exit 1
 fi
@@ -120,11 +120,11 @@ echo "Copying package files..."
 
 cat "$pkg_dir"/files |
 while read i; do
-	if [ -z "$i" ] ; then
+	if [[ -z $i ]]; then
 		continue
 	fi
 
-	if [[ "$i" =~ %[A-Z]*% ]] ; then
+	if [[ "$i" =~ %[A-Z]*% ]]; then
 		current=$i
 		continue
 	fi
@@ -132,11 +132,11 @@ while read i; do
 	case $current in
 		%FILES%)
 			ret=0
-			if [ -e "/$i" ]; then
+			if [[ -e /$i ]]; then
 				bsdtar -cnf - "/$i" 2> /dev/null | bsdtar -xpf -
 
 				# Workaround to bsdtar not reporting a missing file as an error
-				if [ ! -e "$work_dir/$i" -a ! -L "$work_dir/$i" ]; then
+				if ! [[ -e $work_dir/$i || -L $work_dir/$i ]]; then
 					echo ""
 					echo "ERROR: unable to add /$i to the package"
 					echo "       If your user does not have permssion to read this file then"
@@ -154,7 +154,7 @@ while read i; do
 done
 
 ret=$?
-if [ $ret -ne 0 ]; then
+if (( ret )); then
 	rm -rf "$work_dir"
 	exit 1
 fi
@@ -166,7 +166,7 @@ pkg_size=$(du -sk | awk '{print $1 * 1024}')
 #
 echo Generating .PKGINFO metadata...
 echo "# Generated by $progname $progver"    > .PKGINFO
-if [ "$INFAKEROOT" = "1" ]; then
+if [[ $INFAKEROOT == "1" ]]; then
 	echo "# Using $(fakeroot -v)"    >> .PKGINFO
 fi
 echo "# $(LC_ALL=C date)"            >> .PKGINFO
@@ -178,7 +178,7 @@ while read i; do
 		continue;
 	fi
 
-	if [[ "$i" =~ %[A-Z]*% ]] ; then
+	if [[ "$i" =~ %[A-Z]*% ]]; then
 		current=$i
 		continue
 	fi
@@ -241,11 +241,11 @@ done
 
 comp_files=".PKGINFO"
 
-if [ -f "$pkg_dir/install" ] ; then
+if [[ -f $pkg_dir/install ]]; then
 	cp "$pkg_dir/install" "$work_dir/.INSTALL"
 	comp_files+=" .INSTALL"
 fi
-if  [ -f $pkg_dir/changelog ] ; then
+if [[ -f $pkg_dir/changelog ]]; then
 	cp "$pkg_dir/changelog" "$work_dir/.CHANGELOG"
 	comp_files+=" .CHANGELOG"
 fi
@@ -286,7 +286,7 @@ case "$PKGEXT" in
 	*tar)     cat ;;
 esac > ${pkg_file} || ret=$?
 
-if [ $ret -ne 0 ]; then
+if (( ret )); then
 	echo "ERROR: unable to write package to $pkg_dest"
 	echo "       Maybe the disk is full or you do not have write access"
 	rm -rf "$work_dir"