subcommand: move to 'argparse' package

Move the 'Subcommand' interface from the 'main' package of
'git-bundle-server' to the internal 'argparse' library so that it can be
used by the parser as a general representation of an invokable
command/subcommand.

Additionally, keep the 'all()' function in the 'main' package by moving it
to 'main.go'.

Signed-off-by: Victoria Dye <[email protected]>

Author: vdye

cmd/git-bundle-server/main.go

@@ -3,8 +3,21 @@ package main
 import (
 	"log"
 	"os"
+
+	"github.com/github/git-bundle-server/internal/argparse"
 )
 
+func all() []argparse.Subcommand {
+	return []argparse.Subcommand{
+		Delete{},
+		Init{},
+		Start{},
+		Stop{},
+		Update{},
+		UpdateAll{},
+	}
+}
+
 func main() {
 	cmds := all()
 

cmd/git-bundle-server/subcommand.go

@@ -0,0 +1,7 @@
+package argparse
+
+type Subcommand interface {
+	Name() string
+	Description() string
+	Run(args []string) error
+}