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227 lines
7.8 KiB
227 lines
7.8 KiB
# -*- mode: shell-script -*-
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cron:get_config() {
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local cfg="$1" env_hash="$2"
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local cache_file="$CACHEDIR/$FUNCNAME.cache.$(H "$@")" \
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type value
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local k v E E1 title command lock_opts schedule
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if [ -e "$cache_file" ]; then
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debug "$FUNCNAME: SESSION cache hit $1"
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cat "$cache_file"
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return 0
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fi
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type=$(e "$cfg" | shyaml -q get-type 2>/dev/null) || true
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case "$type" in
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"sequence")
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while read-0-err E s; do
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cron:get_config "$s" "$env_hash" || return 1
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done < <(e "$cfg" | p-err shyaml -q get-values-0 -y)
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if [ "$E" != 0 ]; then
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err "Failed to parse sequence while reading config."
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return 1
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fi
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;;
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"struct")
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while read-0-err E k v; do
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while read-0-err E1 schedule lock_opts title command; do
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if [ -n "$title" ]; then
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err "Unexpected label specified in struct."
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echo " Using struct, the key will be used as label." >&2
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echo " So you can't specify a label inner value(s)." >&2
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return 1
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fi
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p0 "$schedule" "$lock_opts" "$k" "$command"
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done < <(p-err cron:get_config "$v" "$env_hash")
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if [ "$E1" != 0 ]; then
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err "Failed to parse value of key '$k' in struct config."
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return 1
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fi
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done < <(e "$cfg" | p-err shyaml -q key-values-0 -y)
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if [ "$E" != 0 ]; then
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err "Failed to parse key values while reading config."
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return 1
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fi
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;;
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"str")
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## examples:
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## (*/5 * * * *) {-k} bash -c "foo bla bla"
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## (@daily) {-p 10 -D} bash -c "foo bla bla"
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value=$(e "$cfg" | yaml_get_values) || {
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err "Failed to parse str while reading config."
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return 1
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}
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if ! [[ "$value" =~ ^[[:space:]]*([a-zA-Z0-9_-]+)?[[:space:]]*"("([^\)]+)")"[[:space:]]+\{([^\}]*)\}[[:space:]]*(.*)$ ]]; then
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err "Invalid syntax, expected: 'LABEL (SCHEDULE) {LOCK_OPTIONS} COMMAND'."
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echo " With LABEL being a possible empty string." >&2
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echo " Received: '$value'" >&2
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return 1
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fi
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printf "%s\0" "${BASH_REMATCH[2]}" "${BASH_REMATCH[3]}" "${BASH_REMATCH[1]}" "${BASH_REMATCH[4]}"
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;;
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NoneType|"")
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:
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;;
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*)
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value=$(e "$cfg" | yaml_get_interpret) || {
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err "Failed to parse value while reading config."
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return 1
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}
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if [[ "$value" == "$cfg" ]]; then
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err "Unrecognized type '$type'."
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return 1
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fi
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cron:get_config "$value" "$env_hash" || return 1
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;;
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esac > "$cache_file.tmp"
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mv "$cache_file.tmp" "$cache_file" >&2
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## if cache file is empty, this is an error
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if [ ! -s "$cache_file" ]; then
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err "Unexpected empty relation options."
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echo " - check that you don't overwrite default options with an empty relation" >&2
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echo " - check your charm is setting default options" >&2
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echo " Original value: '$cfg'" >&2
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rm -f "$cache_file"
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return 1
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fi
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cat "$cache_file"
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}
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cron:entries_from_service() {
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local service="$1" relation_cfg="$2" \
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cache_file="$CACHEDIR/$FUNCNAME.cache.$(H "$@")" \
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label schedule lock_opts title command full_label H
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if [ -e "$cache_file" ]; then
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debug "$FUNCNAME: SESSION cache hit $1"
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cat "$cache_file"
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return 0
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fi
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## XXXvlab; should factorize this with compose-core to setup relation env
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export BASE_SERVICE_NAME=$service
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MASTER_BASE_SERVICE_NAME=$(get_top_master_service_for_service "$service") || return 1
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MASTER_BASE_CHARM_NAME=$(get_service_charm "$MASTER_BASE_SERVICE_NAME") || return 1
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BASE_CHARM_NAME=$(get_service_charm "$service") || return 1
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BASE_CHARM_PATH=$(charm.get_dir "$BASE_CHARM_NAME") || return 1
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export MASTER_BASE_{CHARM,SERVICE}_NAME BASE_CHARM_{PATH,NAME}
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H=$(
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env_vars=(MASTER_BASE_{CHARM,SERVICE}_NAME BASE_CHARM_{PATH,NAME} BASE_SERVICE_NAME)
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values=()
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for v in "${env_vars[@]}"; do
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values+=("${!v}")
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done
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H "${values[@]}"
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)
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label="launch-$service"
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while read-0-err E schedule lock_opts title command; do
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lock_opts=($lock_opts)
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if ! [[ "$schedule" =~ ^(([0-9/,*-]+[[:space:]]+){4,4}[0-9/,*-]+|@[a-z]+)$ ]]; then
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err "Unrecognized schedule '$schedule'."
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return 1
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fi
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## Check that label is only a simple identifier
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if ! [[ "$title" =~ ^[a-zA-Z0-9_-]*$ ]]; then
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err "Unexpected title '$title', please use only alphanumeric, underscore or dashes (can be empty)."
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return 1
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fi
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if ! lock_opts=($(cron:lock_opts "${lock_opts[@]}")); then
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err "Failed to parse lock options."
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return 1
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fi
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if [ -z "$command" ]; then
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err "Unexpected empty command."
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return 1
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fi
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full_label="$label"
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[ -n "$title" ] && full_label+="-$title"
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## escape double-quotes
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command=${command//\"/\\\"}
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p0 "$schedule lock ${full_label} ${lock_opts[*]} -c \"$command\" 2>&1 | awk '{ print strftime(\"%Y-%m-%d %H:%M:%S %Z\"), \$0; fflush(); }' >> /var/log/cron/${full_label}_script.log"
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done < <(p-err cron:get_config "$relation_cfg" "$H") > "$cache_file.tmp"
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mv "$cache_file.tmp" "$cache_file" >&2
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if [ "$E" != 0 ]; then
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rm -f "$cache_file"
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err "Failed to get ${DARKYELLOW}$service${NORMAL}--${DARKBLUE}schedule-command${NORMAL}-->${DARKYELLOW}$SERVICE_NAME${NORMAL}'s config."
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return 1
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fi
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cat "$cache_file"
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}
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cron:lock_opts() {
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local cache_file="$CACHEDIR/$FUNCNAME.cache.$(H "$@")" \
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label schedule lock_opts title
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if [ -e "$cache_file" ]; then
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#debug "$FUNCNAME: SESSION cache hit $1"
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cat "$cache_file"
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return 0
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fi
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lock_opts=()
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while [ "$1" ]; do
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case "$1" in
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"-D"|"-k")
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lock_opts+=("$1")
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;;
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"-p")
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## check that the value is a number
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if ! [[ "$2" =~ ^[0-9]+$ ]]; then
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err "Unexpected value for priority '$2' (expected an integer)."
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return 1
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fi
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lock_opts+=(-p "$2")
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shift
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;;
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"-*"|"--*")
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err "Unrecognized lock option '$1'."
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return 1
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;;
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*)
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err "Unexpected lock argument '$1'."
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return 1
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;;
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esac
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shift
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done
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printf "%s\n" "${lock_opts[@]}" > "$cache_file"
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cat "$cache_file"
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}
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cron:entries() {
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local cache_file="$CACHEDIR/$FUNCNAME.cache.$(H "$SERVICE_NAME" "$ALL_RELATIONS")" \
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s rn ts rc td
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if [ -e "$cache_file" ]; then
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#debug "$FUNCNAME: SESSION cache hit $1"
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cat "$cache_file"
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return 0
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fi
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if [ -z "$ALL_RELATIONS" ]; then
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err "Expected \$ALL_RELATIONS to be set."
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return 1
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fi
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export TARGET_SERVICE_NAME="$SERVICE_NAME"
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while read-0 service relation_cfg; do
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debug "service: '$service' relation_cfg:" >&2
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e "$relation_cfg" | prefix " | " >&2
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echo "" >&2
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cron:entries_from_service "$service" "$relation_cfg" || return 1
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done < <(get_service_incoming_relations "$SERVICE_NAME" "schedule-command") > "$cache_file.tmp"
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mv "$cache_file.tmp" "$cache_file" >&2
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cat "$cache_file"
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}
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export -f cron:entries
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