1234567891011121314151617181920212223242526272829303132333435
/** Returns the path to the user's config directory. * * The returned value depends on the operating system and is either a string, * containing a value from the following table, or `null`. *  * |Platform | Value                                 | Example                              | * | ------- | ------------------------------------- | ------------------------------------ | * | Linux   | `$XDG_CONFIG_HOME` or `$HOME`/.config | /home/justjavac/.config              | * | macOS   | `$HOME`/Library/Preferences           | /Users/justjavac/Library/Preferences | * | Windows | `{FOLDERID_RoamingAppData}`           | C:\Users\justjavac\AppData\Roaming   | */export default function configDir(): string | null {  switch (Deno.build.os) {    case "linux": {      const xdg = Deno.env.get("XDG_CONFIG_HOME");      if (xdg) return xdg;
      const home = Deno.env.get("HOME");      if (home) return `${home}/.config`;      break;    }
    case "darwin": {      const home = Deno.env.get("HOME");      if (home) return `${home}/Library/Preferences`;      break;    }
    case "windows":      return Deno.env.get("FOLDERID_RoamingAppData") ?? null;  }
  return null;}