My disk went full so I wrote the following script to generate a list of all installed packages with their (theoretical) disk-usage as estimated by pacman. #ArchLinux #pacman

list-package-sizes.bash

#!/bin/bash

function list-package-sizes () {
if [ $1 ]; then
    case $1 in
        -h|--help)
            local errno=0
            ;;
        *)
            local errno=1
            echo Error: I do not accept any parameters else then \'-h\' or \'--help\'.
            ;;
    esac
    echo Returns a sortet list of package-sizes in KiB \(and names\) for all packages installed via pacman.  
    return $errno
else
    pacman -Qq |\
        pacman -Qi |\
        egrep "(Name +:|Installed Size :)" |\
        tr -d "\n" |\
        sed -E "s/(Installed Size :|Name +| KiB)//g" |\
        sed -E "s/ +/ /g" |\
        tr ":" "\n" |\
        awk '{print $2,$1}' |\
        sort -n
    return $?
fi
}

if [[ $0 == *list-package-sizes.bash ]]; then
    list-package-sizes "$@"
fi

I noticed a couple of bugs with the text processing.

• There's now possibly more than one space between "Installed Size" and its corresponding colon.
• The KiB unit phrase needn't be especially filtered out.
• Include other size units and sort using them.

diff --git a/list-package-sizes.bash b/list-package-sizes.bash
old mode 100644
new mode 100755
index 3573d84..4d8a51a
--- a/list-package-sizes.bash
+++ b/list-package-sizes.bash
@@ -16,13 +16,14 @@ if [ $1 ]; then
 else
     pacman -Qq |\
         pacman -Qi |\
-        egrep "(Name +:|Installed Size :)" |\
+        egrep "(Name +:|Installed Size +:)" |\
         tr -d "\n" |\
-        sed -E "s/(Installed Size :|Name +| KiB)//g" |\
+        sed -E "s/(Installed Size +:|Name +)//g" |\
         sed -E "s/ +/ /g" |\
         tr ":" "\n" |\
-        awk '{print $2,$1}' |\
-        sort -n
+        awk '{print $2,$3,$1}' |\
+        sed -E 's/ ([KMGT])iB/\1/;s/ B / /' |\
+        sort -h
     return $?
 fi
 }