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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 ("blocked")
# possibly hand out "broken" packages to different build slave
. "${0%/*}/../conf/default.conf"
mkdir -p "${work_dir}/package-states"
hand_out_assignment() {
# locked, broken and blocked packages won't be handed out
if package_locked_broken_or_blocked "$1" "$2" "$3" "$4"; then
return 0
fi
# we don't care anymore if an older version of this package was
# "locked" or "broken" (we keep only marker for older "done" packages)
ls "${work_dir}/package-states" | \
grep "^${1//./\\.}\(\.[^.]\+\)\{3\}\.\(locked\|broken\)\$" | \
sed "s|^|${work_dir}/package-states/|" | \
xargs -rn1 rm -f
echo "$1 $2 $3 $4"
echo "${slave}" > "${work_dir}/package-states/$1.$2.$3.$4.locked"
# lock every loop this package breaks
grep "^${1//./\\.}\$" "${work_dir}/build-list.loops/"loop_* | \
cut -d: -f1 | \
tee -a "${work_dir}/package-states/$1.$2.$3.$4.locked" | \
sed 's|$|.locked|' | \
xargs -rn1 touch
exit 0
}
# 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}"
}
trap clean_up EXIT
# 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 mod_git_revision repository; do
if [ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.broken" ] ||
[ -f "${work_dir}/package-states/${package}.${git_revision}.${mod_git_revision}.${repository}.blocked" ]; then
continue
fi
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
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'
exit 3
fi
if [ ${num_jobs} -ge ${max_parallel_build_per_client} ]; then
>&2 echo "come back, when you've done your work - you hit the limit on maximum allowed parallel jobs per ip"
exit 4
fi
# Find first package of build-list whose dependencies are all met
while read -r package git_revision mod_git_revision repository; do
if package_locked_broken_or_blocked "${package}" "${git_revision}" "${mod_git_revision}" "${repository}"; then
continue
fi
[ -z "$(
(
cat "${work_dir}/package-infos/${package}.${git_revision}.${mod_git_revision}.needs"
awk '{print $1 "." $2 "." $3}' "${work_dir}/build-list" | \
sed "
s|^|${work_dir}/package-infos/|
s|\$|\.builds|
" | \
xargs -r cat | \
sort -u
) | \
sort | \
uniq -d
)" ] || continue
hand_out_assignment "${package}" "${git_revision}" "${mod_git_revision}" "${repository}"
done < "${work_dir}/build-list"
# Find package (of all packages which are not locked)
# which breaks the most unlocked loops
locked_packages="$(
ls "${work_dir}/package-states/" | \
grep '\(\.[0-9a-f]\{40\}\)\{2\}\.[^\.\]\+\.locked$' | \
sed 's|\(\.[0-9a-f]\{40\}\)\{2\}\.[^\.\]\+\.locked$||'
)"
for package in $(
ls "${work_dir}/build-list.loops/" | \
grep '^loop_[0-9]\+$' | \
while read -r loop; do
if [ -z "$(
(
cat "${work_dir}/build-list.loops/${loop}"
echo "${locked_packages}"
) | \
sort | \
uniq -d
)" ]; then
cat "${work_dir}/build-list.loops/${loop}"
fi
done | \
sort | \
uniq -c | \
sort -k1nr,1 | \
awk '{print $2}'
); do
if assignment="$(grep "^${package//./\\.} " "${work_dir}/build-list")"; then
hand_out_assignment ${assignment}
fi
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
|
