Fix Banana Pro error: command failed to execute correctly in Arch Linux

I am a big fan of Arch Linux and I use it everywhere - as my main OS, at all my computers and even on SoCs like Banana Pro. Recently I installed the Arch Linux image on my Banana Pro and faced an issue that every time I would install a package with pacman, it produced the following error:

error: command failed to execute correctly

Here is a fix to get rid of this message.
The issue is not specific to the Banana Pro board or to ARM Linux. It can happen even in the desktop (x86/x64) version of Arch Linux. It is caused by an improperly built image.

The issue is related to the "install-info" command. For some reason, the following file is empty:

/usr/share/info/dir

It is a text file and it should contain information about installed apps and packages. But the Banana Pro Arch Linux image comes with this file empty, so the "install-info" command fails.

It is very easy to fix this issue. It is possible to regenerate the dir file using the following shell script:

#!/bin/sh
rm /usr/share/info/dir
for j in $( { for i in /usr/share/info/*.info /usr/share/info/*.gz; do echo "$i" | sed -r 's/-([0-9]+)\.gz$/\.gz/g'; done; } | uniq) ; do install-info "$j" /usr/share/info/dir; done

Save it as "fix.sh" file and run from root as follows:

# sh ./fix.sh

This will fix the issue and you will be able to maintain your packages properly.

That's it.