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yitzle

Member

Registered: 2008-10-19

Posts: 18

Script to check for updates to /var/abs/* compaired to /var/abs/local/

Motivation: I built some packages myself by copying the directory from /var/abs/* to /var/abs/local and using makepkg.
I updated abs with the abs command, but I have no way of telling if a package I built and installed has an update.

Goal: This script compares all the PKGBUILD files under /var/abs/local to the PKGBUILD for the same package under /var/abs/* and reports differences which would indicate that the package was updated.

In order not to report differences caused by tweaked configure options, the script only looks up to the 'build()' line in the PKGBUILD file.

I don't have many local packages, so this was not tested extensively or against many cases.

Comments, feedback, requests and all the rest would be appreciated.

#!/bin/bash

# Retrieve a list of man pages from pacman for a package
manpages () {
        # Query pacman
        pacman -Ql "$1" | \
        grep $'/usr/share/man/.\n/usr/man/.' | \
        while IFS=' ' read _ file ; do 
                # Strip the path to a num and man page name
                file="${file#/usr}"
                file="${file#/share}"
                file="${file#/man/man}"
                num="${file%%/*}" 
                file="${file#*/}"
                file="${file%%.*}"
                [[ $file ]] || continue 
                echo "$num $file" 
        done
}

(( $# == 0 )) && echo "Usage: "$(basename "$0")" package [more_packages...]"

for arg ; do
        # Get the list of man number and names
        IFS=$'\n' list=( $(manpages "$arg" 2>&1) )

        # Check if any found
        if ! [[ "$list" ]] ; then
                echo "$arg has no man pages."
                continue
        fi

        p='error: package * not found'
        if [[ "${list[0]}" == $p ]] ; then
                list="${list[0]}"
                echo "${list#error: }"
                continue
        fi

        # Only show prompt for more than one man page
        prompt=0
        if (( ${#list[@]} > 1 )) ; then 
                echo "$arg has ${#list[@]} man pages."
                prompt=1
        fi

        for pair in "${list[@]}" ; do
                IFS=' ' read num name <<< "$pair"
                if (( prompt )) ; then
                        # If prompting, ask and allow user to selectively skip pages
                        read -p "Show man $pair? [Y/n] " -n 1
                        [[ $REPLY == [nN] ]] && { echo ; continue ; }
                fi
                man "$num" "$name"
        done
done

Last edited by yitzle (2009-10-06 04:31:46)

Daenyth

Forum Fellow

From: Boston, MA

Registered: 2008-02-24

Posts: 1,244

Re: Script to check for updates to /var/abs/* compaired to /var/abs/local/

When you use -z, or any test in [, make sure to quote the variable. comm might also be handy.

---

[git] | [AURpkgs] | [arch-games]

yitzle

Member

Registered: 2008-10-19

Posts: 18

Re: Script to check for updates to /var/abs/* compaired to /var/abs/local/

Daenyth, thanks for the reply.

When using the bash [[ ]] builtins, quoting is not needed, which is one way they improve on the [ ] tests.

I'll play around with comm and possibly update the above code.