Automatic broken link detection and rebuild

[petronny]

Here is the script that I currently use to detect broken links.

#!/bin/bash
dbdir=/var/lib/pacman/sync
repo=$1

tmp=$(mktemp -d --tmpdir check-links.XXXXXXXXXX)

for i in core extra community arch4edu
do
        tar zxf $dbdir/$i.files --wildcards '*/files' -O 2>/dev/null
done | grep -a '\.so' | sed 's|.*/||g' | sort | uniq > $tmp/files

mkdir -p $tmp/links
tar -C $tmp/links -zxf $repo --wildcards '*/links'
sed 's|.*/||g' -i $(find $tmp/links -type f -name 'links')
sort $(find $tmp/links -name links -type f) | uniq > $tmp/sodepends

diff $tmp/files $tmp/sodepends | grep -P '^\>' | cut -c 3- > $tmp/broken-links
sed '/^%LINKS%$/d' -i $tmp/broken-links
sed '/^libc\.musl-x86_64\.so.*$/d' -i $tmp/broken-links
sed '/^ld-linux\.so.*$/d' -i $tmp/broken-links
sed '/^ld\.so.*$/d' -i $tmp/broken-links

cd $tmp/links

for link in $(cat $tmp/broken-links)
do
        grep -Fx "$link" -r .
done | sort | cut -c 3-

To use it, first update your local pacman database

pacman -Sy
pacman -Fy

Then

./check-links.sh /path/to/arch4edu.links.tar.gz

It will still has false alarmed packages. We need add a new setting in cactus.yaml like check-links:

• when check-links: true, we find out their pkgbase path in arch4edu and trigger the rebuild.
• when check-links: false, we ignore their outputs in check-links.sh.
• when unset, we add a warning somehow to let everybody know it.