rework the commands thing and add a "commands" command to list all commands

1 files changed, 54 insertions, 0 deletions

diff --git a/commands/command.go b/commands/command.go
new file mode 100644
index 00000000..30298d3f
--- /dev/null
+++ b/commands/command.go
@@ -0,0 +1,54 @@
+// Package commands contains the assorted sub commands supported by the git-bug tool.
+package commands
+
+import (
+	"flag"
+	"fmt"
+	"github.com/MichaelMure/git-bug/repository"
+)
+
+const messageFilename = "BUG_MESSAGE_EDITMSG"
+
+// Command represents the definition of a single command.
+type Command struct {
+	// Short description of the command
+	Description string
+	// Command line usage
+	Usage string
+	// Flag set of the command
+	flagSet *flag.FlagSet
+	// Execute the command
+	RunMethod func(repository.Repo, []string) error
+}
+
+// Run executes a command, given its arguments.
+//
+// The args parameter is all of the command line args that followed the
+// subcommand.
+func (cmd *Command) Run(repo repository.Repo, args []string) error {
+	return cmd.RunMethod(repo, args)
+}
+
+func (cmd *Command) PrintUsage(rootCommand string, cmdName string) {
+	fmt.Printf("Usage: %s %s %s\n", rootCommand, cmdName, cmd.Usage)
+
+	if cmd.flagSet != nil {
+		fmt.Printf("\nOptions:\n")
+		cmd.flagSet.PrintDefaults()
+	}
+}
+
+// CommandMap defines all of the available (sub)commands.
+var CommandMap map[string]*Command
+
+// We use init() to avoid a cycle in the data initialization because of the "commands" command
+func init() {
+	CommandMap = map[string]*Command{
+		"commands": commandsCmd,
+		"comment":  commentCmd,
+		"ls":       lsCmd,
+		"new":      newCmd,
+		"pull":     pullCmd,
+		"push":     pushCmd,
+	}
+}