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|
generation_staging_dir() {
local -r final_dist="$1"; shift
local final_base
local staging_parent
local staging_dir
final_base=$(basename "$final_dist")
staging_parent=$(existing_parent_dir "$final_dist")
staging_dir=$(mktemp -d "$staging_parent/.shuriken.$final_base.staging.XXXXXX") \
|| return 1
# mktemp -d forces mode 0700; relax it to the umask-default directory mode
# (what mkdir would have used) so this directory -- which becomes DIST_DIR
# after the swap -- matches its mkdir-created subdirectories and is served and
# synced with sane permissions. Otherwise the published album root stays 0700,
# so the first `shuriken --sync` creates the remote directory 0700 and the web
# server cannot read it.
chmod "$(printf '%o' "$(( 0777 & ~0$(umask) ))")" "$staging_dir" || return 1
printf '%s\n' "$staging_dir"
}
prepare_generation_staging_dir() {
local -r final_dist="$1"; shift
local -r staging_dir="$1"; shift
local cache_dir
if [ "$SHURIKEN_FORCE_GENERATE" = yes ]; then
log_verbose 'Force generation enabled; not reusing existing output cache'
return
fi
# $CP (compat.source.sh): -a (archive mode) is not supported by minimal/older
# BSD cp variants, so this must run against the resolved GNU cp.
for cache_dir in photos thumbs blurs; do
if [ -d "$final_dist/$cache_dir" ]; then
if ! mkdir -p "$staging_dir/$cache_dir"; then
return 1
fi
if ! "$CP" -a "$final_dist/$cache_dir/." "$staging_dir/$cache_dir/"; then
return 1
fi
fi
done
}
cleanup_generation_staging_dir() {
if [ -n "${SHURIKEN_ACTIVE_STAGING_DIR:-}" ]; then
rm -rf "$SHURIKEN_ACTIVE_STAGING_DIR"
SHURIKEN_ACTIVE_STAGING_DIR=''
fi
}
terminate_process_tree() {
local -r signal="$1"; shift
local -r pid="$1"; shift
local child
if [ -z "$pid" ]; then
return
fi
while IFS= read -r child; do
if [ -n "$child" ]; then
terminate_process_tree "$signal" "$child"
fi
done < <(pgrep -P "$pid" 2>/dev/null || true)
kill "-$signal" "$pid" 2>/dev/null || true
}
wait_for_process_exit() {
local -r pid="$1"; shift
local -i attempts=0
while kill -0 "$pid" 2>/dev/null; do
if (( attempts >= 20 )); then
return 1
fi
(( ++attempts ))
sleep 0.05
done
}
terminate_active_generation() {
local -r pid="${SHURIKEN_ACTIVE_GENERATION_PID:-}"
if [ -z "$pid" ]; then
return
fi
terminate_process_tree TERM "$pid"
if ! wait_for_process_exit "$pid"; then
terminate_process_tree KILL "$pid"
fi
wait "$pid" 2>/dev/null || true
SHURIKEN_ACTIVE_GENERATION_PID=''
}
handle_generation_staging_signal() {
local -r status="$1"; shift
clear_generation_staging_traps
terminate_active_generation
cleanup_generation_staging_dir
exit "$status"
}
clear_generation_staging_traps() {
trap - EXIT INT TERM HUP PIPE
}
ignore_generation_staging_interrupts() {
trap '' INT TERM HUP PIPE
}
replace_dist_with_staging() {
local -r staging_dir="$1"; shift
local -r final_dist="$1"; shift
local backup_dist=''
local backup_parent=''
local final_base
local final_parent
local staging_parent
local -i status=0
final_base=$(basename "$final_dist")
final_parent=$(dirname "$final_dist")
staging_parent=$(existing_parent_dir "$final_dist")
if ! mkdir -p "$final_parent"; then
return 1
fi
if [ -e "$final_dist" ]; then
if ! backup_parent=$(
mktemp -d "$staging_parent/.shuriken.$final_base.backup.XXXXXX"
); then
return 1
fi
backup_dist="$backup_parent/dist"
if ! mv "$final_dist" "$backup_dist"; then
rm -rf "$backup_parent"
return 1
fi
fi
if mv "$staging_dir" "$final_dist"; then
if [ -n "$backup_parent" ]; then
rm -rf "$backup_parent"
fi
return 0
else
status=$?
fi
if [ -n "$backup_dist" ] && [ -e "$backup_dist" ]; then
if [ -e "$final_dist" ] && ! rm -rf "$final_dist"; then
printf 'ERROR: Failed to restore %s from %s\n' \
"$final_dist" "$backup_dist" >&2
return "$status"
fi
if ! mv "$backup_dist" "$final_dist"; then
printf 'ERROR: Failed to restore %s from %s\n' \
"$final_dist" "$backup_dist" >&2
return "$status"
fi
rm -rf "$backup_parent"
fi
return "$status"
}
generate_staged() {
local -r final_dist="$DIST_DIR"
local staging_dir
local -i status=0
staging_dir=$(generation_staging_dir "$final_dist")
log_verbose "Effective output directory: $final_dist"
log_verbose "Generation staging directory: $staging_dir"
SHURIKEN_ACTIVE_STAGING_DIR="$staging_dir"
trap cleanup_generation_staging_dir EXIT
trap 'handle_generation_staging_signal 130' INT
trap 'handle_generation_staging_signal 143' TERM
trap 'handle_generation_staging_signal 129' HUP
trap 'handle_generation_staging_signal 141' PIPE
if ! prepare_generation_staging_dir "$final_dist" "$staging_dir"; then
cleanup_generation_staging_dir
clear_generation_staging_traps
return 1
fi
set +e
(
set -e
SHURIKEN_FINAL_DIST_DIR="$final_dist"
export SHURIKEN_FINAL_DIST_DIR
DIST_DIR="$staging_dir" generate
) &
SHURIKEN_ACTIVE_GENERATION_PID=$!
wait "$SHURIKEN_ACTIVE_GENERATION_PID"
status=$?
SHURIKEN_ACTIVE_GENERATION_PID=''
set -e
if (( status != 0 )); then
cleanup_generation_staging_dir
clear_generation_staging_traps
return "$status"
fi
ignore_generation_staging_interrupts
set +e
replace_dist_with_staging "$staging_dir" "$final_dist"
status=$?
set -e
if (( status != 0 )); then
cleanup_generation_staging_dir
clear_generation_staging_traps
return "$status"
fi
SHURIKEN_ACTIVE_STAGING_DIR=''
clear_generation_staging_traps
}
|
