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#!/bin/bash
# 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
# 4: come back, when you've done your work - you hit the limit on
# maximum allowed parallel jobs per ip
# TODO:
# respect build-manually-list
. "${0%/*}/../conf/default.conf"
mkdir -p "${work_dir}/package-states"
hand_out_assignment() {
if [ -f "${work_dir}/package-states/$1.$2.$3.locked" ]; then
return 0
fi
echo "$1 $2 $3"
echo "${SSH_CLIENT%% *}" > "${work_dir}/package-states/$1.$2.$3.locked"
rm -f "${lock_file}"
exit 0
}
# Create a lock file.
exec 9> "${lock_file}"
if ! flock -n 9; then
>&2 echo 'come back (shortly) later - I was running already'
exit 1
fi
# Check if there are any pending packages at all and if the requester
# has already hit its max_parallel_build_per_client limit.
num_jobs=0
pending_packages=false
while read -r package git_revision repository; do
if [ -f "${work_dir}/package-states/${package}.${git_revision}.${repository}.locked" ];
then
if [ "${SSH_CLIENT%% *}" = "$(cat "${work_dir}/package-states/${package}.${git_revision}.${repository}.locked")" ]; then
num_jobs=$[${num_jobs}+1];
fi
else
pending_packages=true
fi
done < "${work_dir}/build-list"
if ! ${pending_packages}; then
>&2 echo 'come back after the next run of get-package-updates - currently there are no pending packages'
rm -f "${lock_file}"
exit 3
fi
if [ ${num_jobs} -ge ${max_parallel_build_per_client} ]; then
>&2 echo "come back, when you've done your work - you hit the limit on maximum allowed parallel jobs per ip"
rm -f "${lock_file}"
exit 4
fi
# Find first package of build-list whose dependencies are all met
while read -r package git_revision repository; do
[ -z "$(
(
cat "${work_dir}/package-infos/${package}."*".needs"
awk '{print $1}' "${work_dir}/build-list"
) | \
sort | \
uniq -d
)" ] || continue
hand_out_assignment "${package}" "${git_revision}" "${repository}"
done < "${work_dir}/build-list"
# Find first package which breaks a loop and is not locked
if [ -s "${work_dir}/tsort.error" ]; then
grep -A1 '^tsort: -: input contains a loop:$' "${work_dir}/tsort.error" | \
cut -d' ' -f2 | \
grep -v -- '^-:$' | \
while read package; do
grep "^${package} " "${work_dir}/build-list" | \
while read -r package git_revision repository; do
hand_out_assignment "${package}" "${git_revision}" "${repository}"
done
done
fi
# Remove the lock file
>&2 echo 'come back later - there are still packages to be built, but currently none has all its dependencies ready'
rm -f "${lock_file}"
exit 2
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