feat: enable specification of module use

This varies based on whether the module is used as a root command, or a
subcommand in another command. Leave the decision up to the user.

aipcli/compilerconfig.go

@@ -12,7 +12,6 @@ type CompilerConfig struct {
 	DefaultHost               string
 	Root                      string
 	GoogleCloudIdentityTokens bool
-	Main                      bool
 }
 
 func (c *CompilerConfig) DefaultAddress() (string, bool) {
@@ -25,7 +24,6 @@ func (c *CompilerConfig) AddToFlagSet(flags *pflag.FlagSet) {
 	flags.Var(stringStringMap{value: c.Hosts}, "hosts", "mapping from alias to host")
 	flags.StringVar(&c.DefaultHost, "default_host", "", "default host override")
 	flags.StringVar(&c.Root, "root", "", "root command")
-	flags.BoolVar(&c.Main, "main", false, "write default root command main.go")
 	flags.BoolVar(&c.GoogleCloudIdentityTokens, "gcloud_identity_tokens", false, "use gcloud to print identity tokens")
 }
 
@@ -37,9 +35,6 @@ func (c *CompilerConfig) Validate() error {
 		}
 		return fmt.Errorf("default_host (%s) must be one of hosts (%s)", c.DefaultHost, strings.Join(hosts, ","))
 	}
-	if c.Main && c.Root == "" {
-		return fmt.Errorf("main option requires root option")
-	}
 	return nil
 }
 

cmd/examplectl/main.go

@@ -8,7 +8,7 @@ import (
 )
 
 func main() {
-	if err := examplectl.NewModuleCommand().Execute(); err != nil {
+	if err := examplectl.NewModuleCommand("examplectl").Execute(); err != nil {
 		_, _ = fmt.Fprintln(os.Stderr, err)
 		os.Exit(1)
 	}

internal/gencli/run.go

@@ -3,7 +3,6 @@ package gencli
 import (
 	"fmt"
 	"path"
-	"strconv"
 	"strings"
 
 	"go.einride.tech/aip-cli/aipcli"
@@ -43,7 +42,7 @@ func generateRootModuleFile(gen *protogen.Plugin, config aipcli.CompilerConfig)
 	if !ok {
 		return fmt.Errorf("param root requires param module to be provided")
 	}
-	g := gen.NewGeneratedFile(path.Join(module, "module.go"), "")
+	g := gen.NewGeneratedFile(path.Join(module, "root.go"), "")
 	generateGeneratedFileHeader(g)
 	g.P("package ", config.Root)
 	cobraCommand := g.QualifiedGoIdent(protogen.GoIdent{
@@ -59,9 +58,9 @@ func generateRootModuleFile(gen *protogen.Plugin, config aipcli.CompilerConfig)
 		GoName:       "NewModuleCommand",
 	})
 	g.P()
-	g.P("func NewModuleCommand() *", cobraCommand, " {")
+	g.P("func NewModuleCommand(use string) *", cobraCommand, " {")
 	g.P("return ", aipCLINewModuleCommand, "(")
-	g.P(strconv.Quote(config.Root), ",")
+	g.P("use,")
 	g.P("&", cliConfig, "{")
 	g.P("Compiler: ", fmt.Sprintf("%#v", config), ",")
 	g.P("},")