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#!/usr/bin/env bash
# Copyright 2016-2017 Luke Shumaker
# This work is free. You can redistribute it and/or modify it under the
# terms of the Do What The Fuck You Want To Public License, Version 2,
# as published by Sam Hocevar. See the COPYING file for more details.
# The user should not call this script directly.
declare -r workdir=/var/lib/pristine-etc
watchdirs=(
/etc
/usr/share/holo/files
)
readonly watchdirs
pacman-watched-name-ver-dirs() {
local dir dirs
dirs=()
for dir in "${watchdirs[@]}"; do
if [[ -d "$dir" ]]; then
dirs+=("$dir")
fi
done
LC_ALL=C pacman -Qo "${dirs[@]}" | sed -r 's| is owned by | |' |
awk '{i=$2" "$3; a[i]=a[i]" "$1} END{for(i in a){print i " " a[i]}}'
}
pacman-all-name-arch() {
LC_ALL=C pacman -Qni | tr $'\n' $'\r' | sed 's/\r\r/\n/g' | sed -r 's|(.*\r)?Name\s*:\s*(\S+)(\r.*)?\rArchitecture\s*:\s*(\S+)\r.*|\2 \4|'
}
pacman-watched-name-arch-ver-dirs() {
join <(pacman-all-name-arch|sort) <(pacman-watched-name-ver-dirs|sort)
}
commit() (
msg="$1"
cd "$workdir"
if ! [[ -d etc.git ]]; then
mkdir -p chroot/etc
(cd chroot/etc && etckeeper init -d "$PWD")
mv chroot/etc/.git etc.git
fi
rm -rf etc; ln -sfT chroot/etc etc # for compatibility with old installs
rm -rf chroot
mkdir chroot
cd chroot
err=false
files=()
while IFS=' ' read -r pkgname arch pkgver dirs; do
file=("/var/cache/pacman/pkg/$pkgname-$pkgver-$arch".pkg.tar.*)
if ! test -f "$file"; then
printf "ERROR: no cached package for %s %s %s\n" "$pkgname" "$pkgver" "$arch"
err=true
fi
files+=("$file $dirs")
done < <(pacman-watched-name-arch-ver-dirs)
if $err; then
return 1
fi
for filespec in "${files[@]}"; do
read file dirs_str <<<"$filespec"
read -a dirs <<<"$dirs_str"
printf " -> %s\n" "$file"
bsdtar xpvf "$file" "${dirs[@]#/}"
done
ln -srT ../etc.git etc/.git
if type holo &>/dev/null; then
mkdir -p -- run usr/lib
ln -sT /usr/lib/holo usr/lib/holo
if [ -f /etc/os-release ]; then
ln -sT /etc/os-release usr/lib/os-release
else
ln -sT /usr/lib/os-release usr/lib/os-release
fi
HOLO_ROOT_DIR=. holo apply
fi
cd etc/
etckeeper update-ignore -d "$PWD"
if etckeeper unclean -d "$PWD"; then
etckeeper commit -d "$PWD" "$msg"
fi
)
pull() (
cd /etc
git remote add pristine "${workdir}/chroot/etc" &>/dev/null || true
git fetch pristine
)
lock() {
local fd=$1
local file=$2
eval "exec $fd>"'"$file"'
flock "${@:3}" "$fd"
}
unlock() {
local fd=$1
exec {fd}>&-
}
main() {
set -e -o pipefail
umask 0022
if ! lock 7 "${workdir}/chroot.lock" -n; then
return 0
fi
while true; do
lock 8 "${workdir}/spool.lock"
if ! [[ -f "${workdir}/spool" ]]; then
return 0
fi
msg="$(cat "${workdir}/spool")"
rm -f "${workdir}/spool"
unlock 8
commit "$msg"
pull
done
}
main "$@"
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