mirror of https://github.com/elisescu/tty-share
Support configuration file
Per default configuration file will be ignored or will be loaded from $HOME/.tty-share if this file exists. A non-default config file behaviour can be changed using -config flag to specify a config file name.pull/13/head
Faruk Kasumovic
4 years ago
parent
6fc776b924
commit
732233ccad
@ -0,0 +1,72 @@
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package main
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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hcl "github.com/hashicorp/hcl"
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)
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// TTYShareConfig - configuration options for CLI flags or config file
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type TTYShareConfig struct {
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LogFileName string `json:"logFileName"`
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UseTLS bool `json:"useTLS"`
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Server string `json:"server"`
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configFileName string
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commandName string
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commandArgs string
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versionFlag bool
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}
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// Load - Load configuration from config file if available and parse CLI options
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// CLI options override any config file settings, having config file is useful
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// for changing default options
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func (conf *TTYShareConfig) Load() {
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defConfigFileName := os.Getenv("HOME") + "/." + path.Base(os.Args[0])
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flag.StringVar(&conf.configFileName, "config", defConfigFileName, "Config file path")
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flag.StringVar(&conf.commandName, "command", os.Getenv("SHELL"), "The command to run")
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if conf.commandName == "" {
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conf.commandName = "bash"
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}
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flag.StringVar(&conf.commandArgs, "args", "", "The command arguments")
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flag.BoolVar(&conf.versionFlag, "version", false, "Print the tty-share version")
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flag.StringVar(&config.LogFileName, "logfile", config.LogFileName, "The name of the file to log")
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flag.BoolVar(&config.UseTLS, "useTLS", config.UseTLS, "Use TLS to connect to the server")
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flag.StringVar(&config.Server, "server", config.Server, "tty-server address")
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flag.Parse()
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if conf.versionFlag {
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fmt.Printf("%s\n", version)
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os.Exit(0)
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}
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if fileInfo, err := os.Stat(conf.configFileName); os.IsNotExist(err) {
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// Ignore if default config file does not exist
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// but report error otherwise
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if conf.configFileName != defConfigFileName {
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fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error())
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os.Exit(1)
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}
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} else {
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var data []byte
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if fileInfo.Size() > 0x100000 {
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// Config larger than 1MiB makes no sense for this little program, report and exit
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fmt.Fprintf(os.Stderr, "Config failed: config file '%s' is too big\n", conf.configFileName)
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os.Exit(3)
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}
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if data, err = ioutil.ReadFile(conf.configFileName); err != nil {
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fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error())
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os.Exit(2)
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}
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if err = hcl.Decode(conf, string(data)); err != nil {
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fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error())
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os.Exit(4)
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}
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fmt.Printf("Configuration loaded from '%s'\n\n", conf.configFileName)
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}
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// Override config file options with CLI / give priority to CLI
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flag.Parse()
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}
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