remove log_file setting from cron

src/cron/cli.v

@@ -6,9 +6,9 @@ import env
 struct Config {
 pub:
 	log_level               string = 'WARN'
-	log_file                string = 'vieter.log'
 	api_key                 string
 	address                 string
+	data_dir string
 	base_image              string = 'archlinux:base-devel'
 	max_concurrent_builds   int    = 1
 	api_update_frequency    int    = 15

src/cron/cron.v

@@ -3,6 +3,9 @@ module cron
 import log
 import cron.daemon
 import cron.expression
+import os
+
+const log_file_name = 'vieter.cron.log'
 
 // cron starts a cron daemon & starts periodically scheduling builds.
 pub fn cron(conf Config) ? {
@@ -15,7 +18,8 @@ pub fn cron(conf Config) ? {
 		level: log_level
 	}
 
-	logger.set_full_logpath(conf.log_file)
+	log_file := os.join_path_single(conf.data_dir, cron.log_file_name)
+	logger.set_full_logpath(log_file)
 	logger.log_to_console_too()
 
 	ce := expression.parse_expression(conf.global_schedule) or {

src/cron/daemon/build.v

@@ -4,11 +4,11 @@ import time
 import sync.stdatomic
 import build
 
-const build_empty = 0
-
-const build_running = 1
-
-const build_done = 2
+const (
+	build_empty   = 0
+	build_running = 1
+	build_done    = 2
+)
 
 // clean_finished_builds removes finished builds from the build slots & returns
 // them.