First basic version

pkg/rootcmd/root.go

@@ -0,0 +1,53 @@
+package rootcmd
+
+import (
+	"context"
+	"flag"
+
+	"github.com/gohugoio/hugoThemesSiteBuilder/pkg/client"
+	"github.com/peterbourgon/ff/v3/ffcli"
+)
+
+// CommandName is the main command's binary name.
+const CommandName = "hugothemesitebuilder"
+
+type Config struct {
+	Out   string
+	Quiet bool
+
+	Client *client.Client
+}
+
+// New constructs a usable ffcli.Command and an empty Config. The config
+// will be set after a successful parse. The caller must
+// initialize the config's client field.
+func New() (*ffcli.Command, *Config) {
+	var cfg Config
+
+	fs := flag.NewFlagSet(CommandName, flag.ExitOnError)
+
+	cfg.RegisterFlags(fs)
+
+	return &ffcli.Command{
+		Name:       CommandName,
+		ShortUsage: CommandName + " [flags] <subcommand> [flags] [<arg>...]",
+		FlagSet:    fs,
+		Exec:       cfg.Exec,
+	}, &cfg
+}
+
+// RegisterFlags registers the flag fields into the provided flag.FlagSet. This
+// helper function allows subcommands to register the root flags into their
+// flagsets, creating "global" flags that can be passed after any subcommand at
+// the commandline.
+func (c *Config) RegisterFlags(fs *flag.FlagSet) {
+	fs.StringVar(&c.Out, "out", "build", "the output folder to write files to (will be created if it does not exist)")
+	fs.BoolVar(&c.Quiet, "quiet", false, "only log errors")
+}
+
+// Exec function for this command.
+func (c *Config) Exec(context.Context, []string) error {
+	// The root command has no meaning, so if it gets executed,
+	// display the usage text to the user instead.
+	return flag.ErrHelp
+}