Add links to more builds to README

Fixes #13.

.goreleaser.yml

@@ -10,6 +10,7 @@ builds:
     goos:
       - linux
       - freebsd
+      - openbsd
       - darwin
       - windows
     goarch:

README.md

@@ -6,14 +6,21 @@ mastotool
 [![Go ReportCard](http://goreportcard.com/badge/muesli/mastotool)](http://goreportcard.com/report/muesli/mastotool)
 [![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](https://pkg.go.dev/github.com/muesli/mastotool)
 
-mastotool offers a collection of tools to work with your Mastodon account
+mastotool offers a collection of command-line tools to work with your Mastodon account
 
 ## Installation
 
-### Packages & Binaries
+### Packages
 
+#### Linux
 - Arch Linux: [mastotool](https://aur.archlinux.org/packages/mastotool/)
-- [Binaries](https://github.com/muesli/mastotool/releases) for Linux, macOS & Windows
+- [Packages](https://github.com/muesli/mastotool/releases) in Debian & RPM formats
+
+#### macOS
+- macOS with [Homebrew](https://brew.sh/): `brew tap muesli/tap && brew install mastotool`
+
+### Binaries
+- [Binaries](https://github.com/muesli/mastotool/releases) for Linux, FreeBSD, OpenBSD, macOS & Windows
 
 ### From source
 

main.go

@@ -22,6 +22,19 @@ var (
 		Short:         "mastotool offers a collection of tools to work with your Mastodon account",
 		SilenceErrors: true,
 		SilenceUsage:  true,
+		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+			if err := initClient(); err != nil {
+				return err
+			}
+
+			var err error
+			self, err = client.GetAccountCurrentUser(context.Background())
+			if err != nil {
+				return fmt.Errorf("Can't retrieve user: %s", err)
+			}
+
+			return nil
+		},
 	}
 )
 
@@ -120,19 +133,8 @@ func initClient() error {
 func main() {
 	RootCmd.PersistentFlags().StringVarP(&configFile, "config", "c", "mastodon.json", "uses the specified config file")
 
-	if err := initClient(); err != nil {
-		fmt.Println(err)
-		os.Exit(1)
-	}
-	var err error
-	self, err = client.GetAccountCurrentUser(context.Background())
-	if err != nil {
-		fmt.Printf("Can't retrieve user: %s\n", err)
-		os.Exit(1)
-	}
-
 	if err := RootCmd.Execute(); err != nil {
 		fmt.Println(err)
-		os.Exit(-1)
+		os.Exit(1)
 	}
 }