pacsysclean: Add new contrib script

pacsysclean sort installed packages by decreasing installed size. It's
useful for finding large unused package when doing system clean-up. This
script is an improved version of other similar scripts posted on the
forums. Thanks goes to Dan for fixing and improving my original script.

Signed-off-by: Eric Bélanger <snowmaniscool@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

contrib/.gitignore

@@ -6,5 +6,6 @@ paclist
 paclog-pkglist
 pacscripts
 pacsearch
+pacsysclean
 wget-xdelta.sh
 zsh_completion

contrib/Makefile.am

@@ -5,7 +5,8 @@ OURSCRIPTS = \
 	paclist \
 	paclog-pkglist \
 	pacscripts \
-	pacsearch
+	pacsearch \
+	pacsysclean
 
 OURFILES = \
 	bash_completion \
@@ -21,6 +22,7 @@ EXTRA_DIST = \
 	paclist.in \
 	pacscripts.in \
 	pacsearch.in \
+	pacsysclean.in \
 	vimprojects \
 	zsh_completion.in \
 	README
@@ -59,6 +61,7 @@ paclist: $(srcdir)/paclist.in
 paclog-pkglist: $(srcdir)/paclog-pkglist.in
 pacscripts: $(srcdir)/pacscripts.in
 pacsearch: $(srcdir)/pacsearch.in
+pacsysclean: $(srcdir)/pacsysclean.in
 pactree: $(srcdir)/pactree.in
 zsh_completion: $(srcdir)/zsh_completion.in
 

contrib/pacsysclean.in

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+# pacsysclean - Sort installed packages by decreasing installed size. Useful for system clean-up.
+
+PACMAN_OPTS=
+
+usage() {
+       echo "pacsysclean - Sort installed packages by decreasing installed size."
+       echo
+       echo "Usage: pacsysclean [options]"
+       echo
+       echo "Options:"
+       echo "  -o <options>     Specify custom pacman query options (e.g., dt)"
+       echo "  -h, --help       Show this help message and exit"
+}
+
+
+if [ -n "$1" ]; then
+       case "$1" in
+               -o) PACMAN_OPTS="${2}" ;;
+               -h|--help) usage; exit 0 ;;
+               *) usage; exit 1 ;;
+       esac
+fi
+
+IFS=$'\n'
+name="^Name.*: (.*)$"
+size="^Installed Size.*: (.*) KiB$"
+for line in $(LANG=C pacman -Qi $PACMAN_OPTS); do
+       if [[ $line =~ $name ]]; then
+               printf "%s\t" ${BASH_REMATCH[1]}
+       elif [[ $line =~ $size ]]; then
+               printf "%s\n" ${BASH_REMATCH[1]}
+       fi
+done | sort -g -k2 | awk '
+BEGIN {
+       split("KiB MiB GiB TiB PiB EiB ZiB YiB", suffix)
+}
+function format_size(size) {
+       count = 1
+       while (size + 0 > 1024) {
+               size /= 1024
+               count++
+       }
+       sizestr = sprintf("%.2f %s", size, suffix[count])
+       return sizestr
+}
+{
+       printf("%s\t%s\n", format_size($2), $1);
+}'