Add interactive prompt as the root command

sp/commands/root.go

@@ -2,7 +2,11 @@ package commands
 
 import (
 	"context"
+	"fmt"
+	"os"
+	"strings"
 
+	"github.com/c-bata/go-prompt"
 	"github.com/spf13/cobra"
 
 	credrepos "github.com/mitchell/selfpass/services/credentials/repositories"
@@ -15,6 +19,7 @@ import (
 func Execute() {
 	rootCmd := &cobra.Command{
 		Use:   "sp",
+		Run:   run,
 		Short: "This is the CLI client for Selfpass.",
 		Long: `This is the CLI client for Selfpass, the self-hosted password manager. With this tool you
 can interact with the entire Selfpass API.`,
@@ -42,6 +47,50 @@ can interact with the entire Selfpass API.`,
 	check(rootCmd.Execute())
 }
 
+func run(cmd *cobra.Command, _ []string) {
+	ss := []prompt.Suggest{
+		{Text: "exit", Description: "Exit selfpass prompt"},
+	}
+
+	for _, subcmd := range cmd.Commands() {
+		ss = append(ss, prompt.Suggest{
+			Text:        subcmd.Name(),
+			Description: subcmd.Short,
+		})
+	}
+
+	completer := func(d prompt.Document) []prompt.Suggest {
+		return prompt.FilterHasPrefix(ss, d.TextBeforeCursor(), true)
+	}
+
+	executor := func(argstr string) {
+		args := strings.Split(argstr, " ")
+
+		if len(args) > 0 && args[0] == "exit" {
+			fmt.Print("Goodbye!\n\n")
+			os.Exit(0)
+		}
+
+		cmd.SetArgs(args)
+		err := cmd.Execute()
+		if err != nil {
+			fmt.Println(err)
+		}
+		fmt.Println()
+	}
+
+	p := prompt.New(
+		executor,
+		completer,
+		prompt.OptionPrefix("selfpass-> "),
+		prompt.OptionPrefixTextColor(prompt.White),
+		prompt.OptionSuggestionBGColor(prompt.DarkBlue),
+		prompt.OptionDescriptionBGColor(prompt.Blue),
+	)
+
+	p.Run()
+}
+
 func makeInitClient(repo types.ConfigRepo, initClient credtypes.CredentialsClientInit) credentialsClientInit {
 	return func(ctx context.Context) credtypes.CredentialsClient {
 		_, cfg, err := repo.OpenConfig()

sp/go.mod

@@ -4,10 +4,12 @@ go 1.12
 
 require (
 	github.com/atotto/clipboard v0.1.2
+	github.com/c-bata/go-prompt v0.2.3
 	github.com/google/uuid v1.1.1
 	github.com/mitchell/selfpass/services v0.0.0-00010101000000-000000000000
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/ncw/rclone v1.48.0
+	github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942 // indirect
 	github.com/pquerna/otp v1.2.0
 	github.com/spf13/cobra v0.0.5
 	github.com/spf13/viper v1.4.0

sp/go.sum

@@ -28,6 +28,8 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/billziss-gh/cgofuse v1.1.0/go.mod h1:LJjoaUojlVjgo5GQoEJTcJNqZJeRU0nCR84CyxKt2YM=
 github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc h1:biVzkmvwrH8WK8raXaxBx6fRVTlJILwEwQGL1I/ByEI=
 github.com/boombuler/barcode v1.0.1-0.20190219062509-6c824513bacc/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
+github.com/c-bata/go-prompt v0.2.3 h1:jjCS+QhG/sULBhAaBdjb2PlMRVaKXQgn+4yzaauvs2s=
+github.com/c-bata/go-prompt v0.2.3/go.mod h1:VzqtzE2ksDBcdln8G7mk2RX9QyGjH+OVqOCSiVIqS34=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/coreos/bbolt v1.3.2/go.mod h1:iRUV2dpdMOn7Bo10OQBFzIJO9kkE559Wcmn+qkEiiKk=
@@ -131,6 +133,7 @@ github.com/mattn/go-colorable v0.0.9 h1:UVL0vNpWh04HeJXV0KLcaT7r06gOH2l4OW6ddYRU
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-isatty v0.0.3 h1:ns/ykhmWi7G9O+8a448SecJU3nSMBXJfqQkl0upE1jI=
 github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
+github.com/mattn/go-runewidth v0.0.4 h1:2BvfKmzob6Bmd4YsL0zygOqfdFnK7GR4QL06Do4/p7Y=
 github.com/mattn/go-runewidth v0.0.4/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
 github.com/mediocregopher/mediocre-go-lib v0.0.0-20181029021733-cb65787f37ed h1:3dQJqqDouawQgl3gBE1PNHKFkJYGEuFb1DbSlaxdosE=
@@ -166,6 +169,8 @@ github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/sftp v1.10.1-0.20190523025818-e98a7bef6829/go.mod h1:NxmoDg/QLVWluQDUYG7XBZTLUpKeFa8e3aMf1BfjyHk=
+github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942 h1:A7GG7zcGjl3jqAqGPmcNjd/D9hzL95SuoOQAaFNdLU0=
+github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942/go.mod h1:eCbImbZ95eXtAUIbLAuAVnBnwf83mjf6QIVH8SHYwqQ=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pquerna/otp v1.2.0 h1:/A3+Jn+cagqayeR3iHs/L62m5ue7710D35zl1zJ1kok=