Add command-specific argument completions

Complete bug IDs, bridges, users, labels where appropriate.

This works in bash and fish. ZSH is not yet supported by Cobra.
In fish, descriptions (the part of a completion after the "\t") are shown
as completion label, and can be searched with Ctrl+S.

Reproduce with

	fish -C 'source misc/fish_completion/git-bug'
	git bug select ^I

(tested with fish version 3.3.1)

Also works with bash, but only for "git-bug" (with the dash)

	bash --rcfile <(echo source misc/bash_completion/git-bug)
	git-bug select ^I

Closes #493

1 files changed, 5 insertions, 1 deletions

diff --git a/commands/user.go b/commands/user.go
index b6a2e485..0fe3be4d 100644
--- a/commands/user.go
+++ b/commands/user.go
@@ -3,6 +3,7 @@ package commands
 import (
 	"errors"
 	"fmt"
+	"strings"
 
 	"github.com/spf13/cobra"
 
@@ -24,6 +25,7 @@ func newUserCommand() *cobra.Command {
 		RunE: closeBackend(env, func(cmd *cobra.Command, args []string) error {
 			return runUser(env, options, args)
 		}),
+		ValidArgsFunction: completeUser(env),
 	}
 
 	cmd.AddCommand(newUserAdoptCommand())
@@ -33,8 +35,10 @@ func newUserCommand() *cobra.Command {
 	flags := cmd.Flags()
 	flags.SortFlags = false
 
+	fields := []string{"email", "humanId", "id", "lastModification", "lastModificationLamports", "login", "metadata", "name"}
 	flags.StringVarP(&options.fields, "field", "f", "",
-		"Select field to display. Valid values are [email,humanId,id,lastModification,lastModificationLamports,login,metadata,name]")
+		"Select field to display. Valid values are ["+strings.Join(fields, ",")+"]")
+	cmd.RegisterFlagCompletionFunc("field", completeFrom(fields))
 
 	return cmd
 }