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#!/bin/bash
# check for packages that need to be built, and build a list in the proper build order
# Details:
# https://github.com/archlinux32/builder/wiki/Build-system#get-package-updates
set -e
lock_file="/tmp/get-package-updates.lock"
# TODO:
# include repository of package customizations
declare -A repo_paths
repo_paths["packages"]="/usr/src/archlinux/packages"
repo_paths["community"]="/usr/src/archlinux/community"
base_dir="$(dirname "$(readlink -f "$0")")/.."
# find the PKGBUILD of a given package in a given repository
# TODO:
# include repository of package customizations
find_pkgbuild() {
for prefix in "${repo_paths["packages"]}" "${repo_paths["community"]}"; do
[ -d "${prefix}/$1" ] || continue
ls "${prefix}/$1/repos/$2-"*"/PKGBUILD" 2> /dev/null && break
done | \
tr ' ' '\n' | \
grep -v -- '-\(staging\|testing\)-[^/]\+/PKGBUILD$' | \
sort | \
tail -n1
}
# Create a lock file for build list.
exec 9>"${lock_file}"
flock -n 9 || exit
# Update git repositories (official packages, community packages and the repository of package customizations).
for repo in "${repo_paths[@]}"; do
git -C "${repo}" pull
done
# Read previous git revision numbers from files.
declare -A old_repo_revisions
for repo in "${!repo_paths[@]}"; do
old_repo_revisions["${repo}"]="$(cat ${base_dir}/work/${repo}.revision)"
done
# Check modified packages from the last update, and put them to the build list.
# If a package is updated, but already on the rebuild list, then just update the git revision number.
# If a package is deleted, remove from the rebuild list, and add it to the deletion list.
# If a new package is added, then ensure that it's not on the deletion list.
for repo in "${!repo_paths[@]}"; do
current_HEAD="$(
git -C "${repo_paths["${repo}"]}" rev-parse HEAD
)"
git -C "${repo_paths["${repo}"]}" diff --name-status "${old_repo_revisions["${repo}"]}" HEAD | \
grep '^.\s[^/]\+/repos/[^/]\+/PKGBUILD$' | \
sed 's|^\(.\)\t\([^/]\+\)/repos/\([^/]\+\)-[^/-]\+/PKGBUILD$|\1 \2 '"${current_HEAD}"' \3|' | \
grep -v '\(staging\|testing\)$'
done | \
sort -u | \
while read -r mode package git_revision repository; do
case "${mode}" in
"A"|"M")
sed -i "/^${package} /d" "${base_dir}/work/build-list"
echo "${package} ${git_revision} ${repository}" >> \
"${base_dir}/work/build-list"
sed -i "/^${package}/d" "${base_dir}/work/deletion-list"
;;
"D")
echo "${package}" >> \
"${base_dir}/work/deletion-list"
sed -i "/^${package} /d" "${base_dir}/work/build-list"
;;
*)
>&2 echo "unknown git diff mode '${mode}'"
exit 1
;;
esac
done
# Put the list in the proper build order.
declare -A packages_built
declare -A packages_needed
while read -r package dummy repository; do
PKGBUILD="$(find_pkgbuild "${package}" "${repository}")"
if [ ! -r "${PKGBUILD}" ]; then
echo "'${package}'" "'${repository}'" "'${PKGBUILD}'"
exit 1
fi
content="$(
sed 's|#.*$||;s|^\s\+||;s|\s\+$||;/^$/d' "${PKGBUILD}" | \
sed '
:begin;
$!N;
s@^\([^=]\+=([^)]*\)\n\(.*\)$@\1 \2@;
tbegin;
P;
D
'
)"
packages_built["${package}"]="$(
echo "${content}" | \
grep '^provides=\|^pkgname=' | \
sed 's|^[^=]\+=||; s|=.*$||' | \
tr "' ()\"" '\n' | \
sort -u | \
sed '/^$/d'
)"
packages_needed["${package}"]="$(
(
echo "${content}" | \
grep '^depends=\|^makedepends=' | \
sed 's|^[^=]\+=||; s|>\?=.*$||' | \
tr "' ()\"" '\n' | \
sort -u | \
sed '/^$/d'
echo "${packages_built["${package}"]}" | \
sed 'p'
) | \
sort | \
uniq -u
)"
done < "${base_dir}/work/build-list"
rm -f "${base_dir}/work/build-list.new"
while [ ${#packages_built[@]} -gt 0 ]; do
found_something=false
for package in "${!packages_built[@]}"; do
if [ -z "$(
(
echo "${packages_needed["${package}"]}"
echo "${!packages_built[@]}" | \
tr ' ' '\n'
) | \
sort | \
uniq -d
)" ]; then
grep "^${package} " "${base_dir}/work/build-list" >> \
"${base_dir}/work/build-list.new"
unset packages_built["${package}"]
unset packages_needed["${package}"]
found_something=true
fi
done
if ${found_something}; then
continue
fi
>&2 echo 'uaagh: there seem to be cyclic dependencies - I give up.'
>&2 echo "packages left: ${!packages_built[@]}"
# TODO: Break circular dependencies
exit 1
done
mv "${base_dir}/work/build-list.new" "${base_dir}/work/build-list"
# Write the current git revision numbers to files.
for repo in "${!repo_paths[@]}"; do
git -C "${repo_paths["${repo}"]}" rev-parse HEAD > \
"${base_dir}/work/${repo}.revision"
done
# Remove the lock file
rm -f "${lock_file}"
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