feat: add mix completer

completers/mix_completer/cmd/root.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	"github.com/carapace-sh/carapace"
+	"github.com/carapace-sh/carapace-bin/pkg/actions/tools/mix"
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "mix",
+	Short: "A build automation tool for working with applications written in the Elixir programming language",
+	Long:  "https://hexdocs.pm/mix/Mix.html",
+	Run:   func(cmd *cobra.Command, args []string) {},
+}
+
+func Execute() error {
+	return rootCmd.Execute()
+}
+
+func init() {
+	carapace.Gen(rootCmd).Standalone()
+
+	carapace.Gen(rootCmd).PositionalCompletion(
+		mix.ActionMixTasks(),
+	)
+}

completers/mix_completer/main.go

@@ -0,0 +1,7 @@
+package main
+
+import "github.com/carapace-sh/carapace-bin/completers/mix_completer/cmd"
+
+func main() {
+	cmd.Execute()
+}

pkg/actions/tools/mix/mix.go

@@ -0,0 +1,29 @@
+// package mix contains mix related actions
+package mix
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/carapace-sh/carapace"
+)
+
+// ActionMixTasks completes mix tasks
+//
+//	install
+//	deps.get
+func ActionMixTasks() carapace.Action {
+	return carapace.ActionCallback(func(c carapace.Context) carapace.Action {
+		return carapace.ActionExecCommand("mix", "help")(func(output []byte) carapace.Action {
+			lines := strings.Split(string(output), "\n")
+			r := regexp.MustCompile(`^mix (\S+)\s*# (.*)`)
+			vals := make([]string, 0)
+			for _, line := range lines {
+				if matches := r.FindStringSubmatch(line); matches != nil {
+					vals = append(vals, matches[1], matches[2])
+				}
+			}
+			return carapace.ActionValuesDescribed(vals...)
+		})
+	})
+}