ConfigDir for Go

This library provides a cross platform means of detecting the system's configuration directories so that your Go app can store config files in a standard location. For Linux and other Unixes (BSD, etc.) this means using the Freedesktop.org XDG Base Directory Specification (0.8), and for Windows and macOS it uses their standard directories.

This is a simple no-nonsense module that just gives you the path names to do with as you please. You can either get the bare root config path, or get a path with any number of names suffixed onto it for vendor- or application-specific namespacing.

For the impatient, the directories this library can return tend to be like the following:

	System-wide Configuration
Windows	`%PROGRAMDATA%` or `C:\ProgramData`
Linux	`$XDG_CONFIG_DIRS` or `/etc/xdg`
macOS	`/Library/Application Support`
	User-level Configuration
Windows	`%APPDATA%` or `C:\Users\%USER%\AppData\Roaming`
Linux	`$XDG_CONFIG_HOME` or `$HOME/.config`
macOS	`$HOME/Library/Application Support`
	User-level Cache Folder
Windows	`%LOCALAPPDATA%` or `C:\Users\%USER%\AppData\Local`
Linux	`$XDG_CACHE_HOME` or `$HOME/.cache`
macOS	`$HOME/Library/Caches`

Quick Start

// A common use case is to get a private config folder for your app to
// place its settings files into, that are specific to the local user.
configPath := configdir.LocalConfig("my-app")
err := configdir.MakePath(configPath) // Ensure it exists.
if err != nil {
    panic(err)
}

// Deal with a JSON configuration file in that folder.
configFile := filepath.Join(configPath, "settings.json")
type AppSettings struct {
    Username string `json:"username"`
    Password string `json:"password"`
}
var settings AppSettings

// Does the file not exist?
if _, err = os.Stat(configFile); os.IsNotExist(err) {
    // Create the new config file.
    settings = AppSettings{"MyUser", "MyPassword"}
    fh, err := os.Create(configFile)
    if err != nil {
        panic(err)
    }
    defer fh.Close()

    encoder := json.NewEncoder(fh)
    encoder.Encode(&settings)
} else {
    // Load the existing file.
    fh, err := os.Open(configFile)
    if err != nil {
        panic(err)
    }
    defer fh.Close()

    decoder := json.NewDecoder(fh)
    decoder.Decode(&settings)
}

Documentation

Package documentation is available at https://godoc.org/github.com/kirsle/configdir

Author

Noah Petherbridge, @kirsle

License

MIT

License

kirsle/configdir

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