Implement Cobra CLI tooling, Viper config tooling (#336)

* start pulling out + replacing urfave and config

* replace many many instances of config

* move more stuff => viper

* properly remove urfave

* move some flags to root command

* add testrig commands to root

* alias config file keys

* start adding cli parsing tests

* reorder viper init

* remove config path alias

* fmt

* change config file keys to non-nested

* we're more or less in business now

* tidy up the common func

* go fmt

* get tests passing again

* add note about the cliparsing tests

* reorganize

* update docs with changes

* structure cmd dir better

* rename + move some files around

* fix dangling comma

1 files changed, 35 insertions, 14 deletions

diff --git a/cmd/gotosocial/main.go b/cmd/gotosocial/main.go
index 87c44487c..a0b8b1046 100644
--- a/cmd/gotosocial/main.go
+++ b/cmd/gotosocial/main.go
@@ -19,38 +19,59 @@
 package main
 
 import (
-	"os"
-
 	"github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 
+	"github.com/superseriousbusiness/gotosocial/cmd/gotosocial/flag"
 	_ "github.com/superseriousbusiness/gotosocial/docs"
-	"github.com/urfave/cli/v2"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
 )
 
-// Version is the software version of GtS being used
+// Version is the software version of GtS being used.
 var Version string
 
-// Commit is the git commit of GtS being used
+// Commit is the git commit of GtS being used.
 var Commit string
 
 //go:generate swagger generate spec
 func main() {
 	var v string
-	if Commit == "" {
+	if len(Commit) < 7 {
 		v = Version
 	} else {
 		v = Version + " " + Commit[:7]
 	}
 
-	flagsSlice := getFlags()
-	app := &cli.App{
-		Version:  v,
-		Usage:    "a fediverse social media server",
-		Flags:    flagsSlice,
-		Commands: getCommands(flagsSlice),
+	// override software version in viper store
+	viper.Set(config.Keys.SoftwareVersion, v)
+
+	// instantiate the root command
+	rootCmd := &cobra.Command{
+		Use:           "gotosocial",
+		Short:         "GoToSocial - a fediverse social media server",
+		Long:          "GoToSocial - a fediverse social media server\n\nFor help, see: https://docs.gotosocial.org.\n\nCode: https://github.com/superseriousbusiness/gotosocial",
+		Version:       v,
+		SilenceErrors: true,
+		SilenceUsage:  true,
+	}
+
+	// attach global flags to the root command so that they can be accessed from any subcommand
+	flag.Global(rootCmd, config.Defaults)
+
+	// bind the config-path flag to viper early so that we can call it in the pre-run of following commands
+	if err := viper.BindPFlag(config.Keys.ConfigPath, rootCmd.PersistentFlags().Lookup(config.Keys.ConfigPath)); err != nil {
+		logrus.Fatalf("error attaching config flag: %s", err)
 	}
 
-	if err := app.Run(os.Args); err != nil {
-		logrus.Fatal(err)
+	// add subcommands
+	rootCmd.AddCommand(serverCommands())
+	rootCmd.AddCommand(testrigCommands())
+	rootCmd.AddCommand(debugCommands())
+	rootCmd.AddCommand(adminCommands())
+
+	// run
+	if err := rootCmd.Execute(); err != nil {
+		logrus.Fatalf("error executing command: %s", err)
 	}
 }