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pacman/contrib/pacsysclean.in
Lukas Fleischer a77e638c77 contrib/*: Support the "--help" and "--version" options
Add "--help"/"-h" and "--version"/"-V" support to all contrib scripts.
Also, update scripts that used "-v" as a short option for "--version"
and use "-V" for the sake of consistency.

Additionally:

* Move version and usage messages to separate convenience functions in
  all scripts.

* Add a workaround to paccache to support "--help" and "--version". This
  should be replaced by a proper POSIX-compliant command line parser
  that supports long options in a future patch.

* Add a "$myver" variable to all scripts and use it whenever we refer to
  the program version (e.g. in version messages). Also, use the pacman
  version number everywhere instead of using a different versioning
  scheme for each contrib script. This is achieved by adding a
  "PACKAGE_VERSION" placeholder that is replaced by sed(1) when the
  script is built.

* Ensure we always return with exit status 0 if "--help" is used and
  return with exit status 1 if we display the usage message due to
  invalid arguments.

* Add "AUTOMAKE_OPTIONS = std-options" and add all scripts to
  "bin_SCRIPTS" to make `make installcheck` check that installed scripts
  actually support the "--help" and "--version" options.

Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
Signed-off-by: Dan McGee <dan@archlinux.org>
2011-12-23 14:49:46 -06:00

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#!/bin/bash
# pacsysclean - Sort installed packages by decreasing installed size. Useful for system clean-up.
declare -r myname='pacsysclean'
declare -r myver='@PACKAGE_VERSION@'
PACMAN_OPTS=
usage() {
echo "$myname - Sort installed packages by decreasing installed size."
echo
echo "Usage: $myname [options]"
echo
echo "Options:"
echo " -o <options> Specify custom pacman query options (e.g., dt)"
echo " -h, --help Show this help message and exit"
}
version() {
printf "%s %s\n" "$myname" "$myver"
echo 'Copyright (C) 2011 Eric Bélanger <snowmaniscool@gmail.com>'
}
if [ -n "$1" ]; then
case "$1" in
-o) PACMAN_OPTS="${2}" ;;
-h|--help) usage; exit 0 ;;
-V|--version) version; 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);
}'