commands: Add "hugo build" as an alias for "hugo"

Closes #11391

commands/commandeer.go

@@ -499,16 +499,26 @@ func (r *rootCommand) IsTestRun() bool {
 }
 
 func (r *rootCommand) Init(cd *simplecobra.Commandeer) error {
+	return r.initRootCommand("", cd)
+}
+
+func (r *rootCommand) initRootCommand(subCommandName string, cd *simplecobra.Commandeer) error {
 	cmd := cd.CobraCommand
-	cmd.Use = "hugo [flags]"
-	cmd.Short = "hugo builds your site"
-	cmd.Long = `hugo is the main command, used to build your Hugo site.
+	commandName := "hugo"
+	if subCommandName != "" {
+		commandName = subCommandName
+	}
+	cmd.Use = fmt.Sprintf("%s [flags]", commandName)
+	cmd.Short = fmt.Sprintf("%s builds your site", commandName)
+	cmd.Long = `COMMAND_NAME is the main command, used to build your Hugo site.
 
 Hugo is a Fast and Flexible Static Site Generator
 built with love by spf13 and friends in Go.
 
 Complete documentation is available at https://gohugo.io/.`
 
+	cmd.Long = strings.ReplaceAll(cmd.Long, "COMMAND_NAME", commandName)
+
 	// Configure persistent flags
 	cmd.PersistentFlags().StringVarP(&r.source, "source", "s", "", "filesystem path to read files relative from")
 	_ = cmd.MarkFlagDirname("source")

commands/commands.go

@@ -14,6 +14,8 @@
 package commands
 
 import (
+	"context"
+
 	"github.com/bep/simplecobra"
 )
 
@@ -21,6 +23,7 @@ import (
 func newExec() (*simplecobra.Exec, error) {
 	rootCmd := &rootCommand{
 		commands: []simplecobra.Commander{
+			newHugoBuildCmd(),
 			newVersionCmd(),
 			newEnvCommand(),
 			newServerCommand(),
@@ -38,3 +41,33 @@ func newExec() (*simplecobra.Exec, error) {
 
 	return simplecobra.New(rootCmd)
 }
+
+func newHugoBuildCmd() simplecobra.Commander {
+	return &hugoBuildCommand{}
+}
+
+// hugoBuildCommand just delegates to the rootCommand.
+type hugoBuildCommand struct {
+	rootCmd *rootCommand
+}
+
+func (c *hugoBuildCommand) Commands() []simplecobra.Commander {
+	return nil
+}
+
+func (c *hugoBuildCommand) Name() string {
+	return "build"
+}
+
+func (c *hugoBuildCommand) Init(cd *simplecobra.Commandeer) error {
+	c.rootCmd = cd.Root.Command.(*rootCommand)
+	return c.rootCmd.initRootCommand("build", cd)
+}
+
+func (c *hugoBuildCommand) PreRun(cd, runner *simplecobra.Commandeer) error {
+	return c.rootCmd.PreRun(cd, runner)
+}
+
+func (c *hugoBuildCommand) Run(ctx context.Context, cd *simplecobra.Commandeer, args []string) error {
+	return c.rootCmd.Run(ctx, cd, args)
+}