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Support configuration file and sharing as read only #14
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fkasumovic
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| package main | ||
|
|
||
| import ( | ||
| "flag" | ||
| "fmt" | ||
| "io/ioutil" | ||
| "os" | ||
| "path" | ||
|
|
||
| hcl "github.com/hashicorp/hcl" | ||
| ) | ||
|
|
||
| // TTYShareConfig - configuration options for CLI flags or config file | ||
| type TTYShareConfig struct { | ||
| LogFileName string `json:"logFileName"` | ||
| UseTLS bool `json:"useTLS"` | ||
| Server string `json:"server"` | ||
| configFileName string | ||
| commandName string | ||
| commandArgs string | ||
| versionFlag bool | ||
| } | ||
|
|
||
| // Load - Load configuration from config file if available and parse CLI options | ||
| // CLI options override any config file settings, having config file is useful | ||
| // for changing default options | ||
| func (conf *TTYShareConfig) Load() { | ||
| defConfigFileName := os.Getenv("HOME") + "/." + path.Base(os.Args[0]) | ||
| flag.StringVar(&conf.configFileName, "config", defConfigFileName, "Config file path") | ||
| flag.StringVar(&conf.commandName, "command", os.Getenv("SHELL"), "The command to run") | ||
| if conf.commandName == "" { | ||
| conf.commandName = "bash" | ||
| } | ||
| flag.StringVar(&conf.commandArgs, "args", "", "The command arguments") | ||
| flag.BoolVar(&conf.versionFlag, "version", false, "Print the tty-share version") | ||
| flag.StringVar(&config.LogFileName, "logfile", config.LogFileName, "The name of the file to log") | ||
| flag.BoolVar(&config.UseTLS, "useTLS", config.UseTLS, "Use TLS to connect to the server") | ||
| flag.StringVar(&config.Server, "server", config.Server, "tty-server address") | ||
| flag.Parse() | ||
|
|
||
| if conf.versionFlag { | ||
| fmt.Printf("%s\n", version) | ||
| os.Exit(0) | ||
| } | ||
|
|
||
| if fileInfo, err := os.Stat(conf.configFileName); os.IsNotExist(err) { | ||
| // Ignore if default config file does not exist | ||
| // but report error otherwise | ||
| if conf.configFileName != defConfigFileName { | ||
| fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error()) | ||
| os.Exit(1) | ||
| } | ||
| } else { | ||
| var data []byte | ||
| if fileInfo.Size() > 0x100000 { | ||
| // Config larger than 1MiB makes no sense for this little program, report and exit | ||
| fmt.Fprintf(os.Stderr, "Config failed: config file '%s' is too big\n", conf.configFileName) | ||
| os.Exit(3) | ||
| } | ||
| if data, err = ioutil.ReadFile(conf.configFileName); err != nil { | ||
| fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error()) | ||
| os.Exit(2) | ||
| } | ||
| if err = hcl.Decode(conf, string(data)); err != nil { | ||
| fmt.Fprintf(os.Stderr, "Config failed: %s\n", err.Error()) | ||
| os.Exit(4) | ||
| } | ||
| fmt.Printf("Configuration loaded from '%s'\n\n", conf.configFileName) | ||
| } | ||
| // Override config file options with CLI / give priority to CLI | ||
| flag.Parse() | ||
| } | ||
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Please consider following the XDG Base Directory Specification on where to save configuration files!
https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html