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#!/bin/sh
# receive one package to be built from the build-list whose dependencies
# are already satisfied or which breaks a dependency cycle
# exit code shows state of success:
# 0: ok, I gave you an assignment
# 1: come back (shortly) later - I was running already
# 2: come back later - there are still packages to be built,
# but currently none has all its dependencies ready
# 3: come back after the next run of get-package-updates - currently
# there are no pending packages
# shellcheck source=conf/default.conf
. "${0%/*}/../conf/default.conf"
mkdir -p "${work_dir}/package-states"
hand_out_assignment() {
# locked and blocked packages won't be handed out
if package_locked_or_blocked "$1" "$2" "$3" "$4"; then
return 0
fi
# we don't care anymore if an older version of this package was
# "locked" or "broken" (we keep only marker for older "done" packages)
find "${work_dir}/package-states" -maxdepth 1 | \
grep "/$(str_to_regex "${1}")\(\.[^.]\+\)\{3\}\.\(locked\|broken\)\$" | \
grep -v "/$(str_to_regex "$1.$2.$3.$4.")[^.]\+\$" | \
xargs -rn1 rm -f
{
grep -vxF "$1 $2 $3 $4" "${work_dir}/build-list" || \
true
printf '%s %s %s %s\n' "$1" "$2" "$3" "$4"
} | \
sponge "${work_dir}/build-list"
echo "$1 $2 $3 $4"
# shellcheck disable=SC2154
echo "${slave}" > "${work_dir}/package-states/$1.$2.$3.$4.locked"
# lock every loop this package breaks
find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
-regex '.*/loop_[0-9]\+' \
-exec grep -qxF "$1" '{}' \; \
-exec touch '{}.locked' \; \
-print >> \
"${work_dir}/package-states/$1.$2.$3.$4.locked"
exit 0
}
if [ -s "${work_dir}/build-master-sanity" ]; then
>&2 echo 'Build master is not sane.'
exit 1
fi
# Create a lock file and a trap.
exec 9> "${build_list_lock_file}"
if ! flock -n 9; then
>&2 echo 'come back (shortly) later - I cannot lock build list.'
exit 1
fi
clean_up() {
rm -f "${build_list_lock_file}"
rm -rf --one-file-system "${tmp_dir}"
}
tmp_dir=$(mktemp -d)
trap clean_up EXIT
# Check if there are any pending packages at all and if the requester
# has already got an assignment.
pending_packages=false
while read -r package git_revision mod_git_revision repository; do
if [ -z "${git_revision}${mod_git_revision}${repository}" ] && \
[ "${package}" = 'break_loops' ]; then
continue
fi
generate_package_metadata "${package}.${git_revision}.${mod_git_revision}.${repository}"
if [ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.locked" ]; then
if [ "${slave}" = "$(head -n1 "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.locked")" ]; then
echo "${package} ${git_revision} ${mod_git_revision} ${repository}"
exit
fi
elif [ ! -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.blocked" ]; then
pending_packages=true
fi
done < "${work_dir}/build-list"
if ! ${pending_packages}; then
>&2 echo 'come back after the next run of get-package-updates - currently there are no pending packages'
exit 3
fi
# Find first package of build-list whose "dependencies" are all met
# 1st: prefered packages on the build list which have all dependencies met
# 2nd: unbroken packages on the build list which have all dependencies met
# 3rd: unbroken packages breaking a loop
# 4th: broken packages which have all dependencies met or break a loop
for iteration in 'prefered' 'fresh' 'loops' 'broken'; do
case "${iteration}" in
'prefered')
hand_out_blocked=true
hand_out_broken=true
hand_out_loop=false
echo "$1" | \
tr ',' '\n' | \
sort -u > \
"${tmp_dir}/hand-out-only-these-packages"
;;
'fresh')
hand_out_blocked=false
hand_out_broken=false
hand_out_loop=false
{
grep -vxF 'break_loops' "${work_dir}/build-list"
find "${work_dir}/package-states" -name '*.broken' -printf '%f\n' | \
sed '
s|\.\([^.]\+\)\.\([^.]\+\)\.\([^.]\+\)\.[^.]\+$| \1 \2 \3|
p
'
} | \
sort -k1,1 -k2 | \
uniq -u | \
cut -d' ' -f1 | \
uniq > \
"${tmp_dir}/hand-out-only-these-packages"
;;
'loops')
hand_out_blocked=false
hand_out_broken=false
hand_out_loop=true
find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
-regex '.*/loop_[0-9]\+' \
-exec cat {} \; | \
sort -u > \
"${tmp_dir}/hand-out-only-these-packages"
;;
'broken')
hand_out_blocked=false
hand_out_broken=true
hand_out_loop=true
grep -vxF 'break_loops' "${work_dir}/build-list" | \
cut -d' ' -f1 | \
sort -u > \
"${tmp_dir}/hand-out-only-these-packages"
;;
esac
grep -vxF 'break_loops' "${work_dir}/build-list" | \
cat -n | \
sort -k2,2 | \
join -1 1 -2 2 -o 2.1,2.2,2.3,2.4,2.5 "${tmp_dir}/hand-out-only-these-packages" - | \
sort -k1,1 | \
sed 's|^\s*\S\+\s\+||' > \
"${tmp_dir}/try-to-hand-out-these-packages"
while read -r package git_revision mod_git_revision repository; do
# package locked?
if [ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.locked" ]; then
continue
fi
# package blocked?
if ! ${hand_out_blocked} &&
[ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.blocked" ]; then
continue
fi
# package broken?
if ! ${hand_out_broken} && \
[ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.broken" ]; then
continue
fi
# dependencies met?
if [ -n "$(find_dependencies_on_build_list "${package}" "${git_revision}" "${mod_git_revision}" "${repository}")" ]; then
# do we hand out looped packages?
if ! ${hand_out_loop}; then
continue
fi
# is it a looped package?
if ! find "${work_dir}/build-list.loops" -maxdepth 1 -regextype grep \
-regex '.*/loop_[0-9]\+' \
-exec cat {} \; | \
grep -qxF "${package}"; then
continue
fi
fi
hand_out_assignment "${package}" "${git_revision}" "${mod_git_revision}" "${repository}"
done < \
"${tmp_dir}/try-to-hand-out-these-packages"
done
# Remove the lock file
>&2 echo 'come back later - there are still packages to be built, but currently none has all its dependencies ready'
exit 2
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