Refactor main

Convert components to Singletons
Restructure main package
Reduce dependencies

cmd/cc-backend/cli.go

@@ -0,0 +1,33 @@
+// Copyright (C) NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package main
+
+import "flag"
+
+var (
+	flagReinitDB, flagInit, flagServer, flagSyncLDAP, flagGops, flagMigrateDB, flagRevertDB, flagForceDB, flagDev, flagVersion, flagLogDateTime bool
+	flagNewUser, flagDelUser, flagGenJWT, flagConfigFile, flagImportJob, flagLogLevel                                                           string
+)
+
+func cliInit() {
+	flag.BoolVar(&flagInit, "init", false, "Setup var directory, initialize swlite database file, config.json and .env")
+	flag.BoolVar(&flagReinitDB, "init-db", false, "Go through job-archive and re-initialize the 'job', 'tag', and 'jobtag' tables (all running jobs will be lost!)")
+	flag.BoolVar(&flagSyncLDAP, "sync-ldap", false, "Sync the 'user' table with ldap")
+	flag.BoolVar(&flagServer, "server", false, "Start a server, continues listening on port after initialization and argument handling")
+	flag.BoolVar(&flagGops, "gops", false, "Listen via github.com/google/gops/agent (for debugging)")
+	flag.BoolVar(&flagDev, "dev", false, "Enable development components: GraphQL Playground and Swagger UI")
+	flag.BoolVar(&flagVersion, "version", false, "Show version information and exit")
+	flag.BoolVar(&flagMigrateDB, "migrate-db", false, "Migrate database to supported version and exit")
+	flag.BoolVar(&flagRevertDB, "revert-db", false, "Migrate database to previous version and exit")
+	flag.BoolVar(&flagForceDB, "force-db", false, "Force database version, clear dirty flag and exit")
+	flag.BoolVar(&flagLogDateTime, "logdate", false, "Set this flag to add date and time to log messages")
+	flag.StringVar(&flagConfigFile, "config", "./config.json", "Specify alternative path to `config.json`")
+	flag.StringVar(&flagNewUser, "add-user", "", "Add a new user. Argument format: `<username>:[admin,support,manager,api,user]:<password>`")
+	flag.StringVar(&flagDelUser, "del-user", "", "Remove user by `username`")
+	flag.StringVar(&flagGenJWT, "jwt", "", "Generate and print a JWT for the user specified by its `username`")
+	flag.StringVar(&flagImportJob, "import-job", "", "Import a job. Argument format: `<path-to-meta.json>:<path-to-data.json>,...`")
+	flag.StringVar(&flagLogLevel, "loglevel", "warn", "Sets the logging level: `[debug,info,warn (default),err,fatal,crit]`")
+	flag.Parse()
+}