archlinux makeworld / pacbuilder - rebuild entire distro

build.sh

#!/usr/bin/zsh

# make the /home/repo directory and /home/repo/asp directories
# clone any git repositories for PKGBUILD into this directory
# and the script will pull changes in them and rebuild.

# for example:
#   git clone git@github.com:CachyOS/CachyOS-PKGBUILDS.git

cd /home/repo/asp || exit

# update core arch PKGBUILDs
asp update
asp checkout $({ paru -Sl core; paru -Sl community; paru -Sl extra; paru -Sl multilib; } | grep "installed" | awk '{ print $2 }')

cd /home/repo || exit
# pull any git repos
find /home/repo -type d -name ".git" -execdir git reset --hard ';'
find /home/repo -type d -name ".git" -execdir git pull --rebase --autostash ';'

# change architecture
find /home/repo -name "PKGBUILD" | xargs -I {} sed -i 's/arch=(x86_64)/arch=(x86_64_v3)/' {}
find /home/repo -name "PKGBUILD" | xargs -I {} sed -i "s/arch=('x86_64')/arch=('x86_64_v3')/" {}

# grep for arch x86_64 so time isn't wasted rebuilding "any" arch packages
# twice so it only uses trunk asp builds
# as asp puts two or more PKGBUILD files under the directory for the package
# second find is for things not in the asp directory if you have things checked out from git

# shuf is used here to randomize the order things build
# so if the script dies for some reason it won't start at the beginning and die at the same place

for x in $(
    {
        grep -El "arch=\('?x86_64" /home/repo/**/PKGBUILD | grep "asp.*trunk";
        grep -El "arch=\('?x86_64" /home/repo/**/PKGBUILD | grep -v "asp";
    } | shuf)

do
    d=$(dirname $x)
    cd $d
    pwd
    # yes 1 will choose the first option when pacman asks which package will fulfill dependency
    yes 1 | makepkg -Ascr --noconfirm
done

# makepkg line below required for packages to be deposited here
cd /home/packages/
rm custom.*
# clean up old packages
repo-add ./custom.db.tar.gz ./*.tar.zst 2>&1 | grep -B 1 "A newer version" | grep "Adding package" | awk -F "'" '{ print $2 }' | xargs rm

rm custom.*
# build new package db
repo-add custom.db.tar.gz *.tar.zst

makepkg.conf

# add below to put packages in the directory which above uses
PKGDEST=/home/packages

# I also recommend the below to keep stuff nicely separated
BUILDDIR=/home/tmp
SRCDEST=/home/sources

# I keep /home/tmp on SSD, and packages and sources on a big hard disk

pacman.conf

# add below to have pacman use built packages

[custom]
SigLevel = Optional
Server = file:///home/packages

to clone all garuda pkgbuilds...

# below snippet will clone all the garuda PKGBUILDs if you want to rebuild them...

for repo in $(curl -s --header "PRIVATE-TOKEN: [INSERT YOUR TOKEN HERE]" "https://gitlab.com/api/v4/groups/11326526?include_subgroups=true" | jq -r ".projects[].ssh_url_to_repo"); do git clone $repo; done