add version and verbose flags

cmd/cmd.go

@@ -39,7 +39,8 @@ func Init() *cobra.Command {
 		Short: "cornucopia run a code generation script.",
 		Long: `cornucopia run a code generation script, find more details at :
 https://github.com/dvaumoron/cornucopia`,
-		Args: cobra.ExactArgs(1),
+		Version: "v1.1.0",
+		Args:    cobra.ExactArgs(1),
 		RunE: func(_ *cobra.Command, args []string) error {
 			if err != nil {
 				return err
@@ -50,6 +51,14 @@ https://github.com/dvaumoron/cornucopia`,
 			thread := &starlark.Thread{Name: common.Prefix + scriptname, Load: loader.Load}
 			glu.InitCornucopiaGlobals()
 
+			if conf.Verbose {
+				fmt.Println("Use the repository", conf.RepoPath, "as local cache")
+				fmt.Println("Use the url", conf.RepoUrl, "as base to download script")
+				if conf.ForceDownload {
+					fmt.Println("Skip local cache in script resolution (still write in it)")
+				}
+			}
+
 			_, err = starlark.ExecFile(thread, scriptname, nil, nil)
 			generated := len(glu.GeneratedFilenames) != 0
 			if err != nil {
@@ -72,6 +81,7 @@ https://github.com/dvaumoron/cornucopia`,
 	cmdFlags.StringVar(&conf.RepoPath, "repo-path", defaultRepoPath, "Local path of the script cache repository")
 	cmdFlags.StringVar(&conf.RepoUrl, "repo-addr", defaultRepoUrl, "Address of the shared script repository")
 	cmdFlags.BoolVarP(&conf.ForceDownload, "force-download", "f", false, "Force download in module resolution")
+	cmdFlags.BoolVarP(&conf.Verbose, "verbose", "v", false, "Verbose output")
 
 	return cmd
 }

config/config.go

@@ -29,6 +29,7 @@ type Config struct {
 	RepoPath      string
 	RepoUrl       string
 	ForceDownload bool
+	Verbose       bool
 }
 
 func InitDefault(envRepoPathName string, envRepoUrlName string) (string, string, error) {

module/module.go

@@ -21,6 +21,7 @@ package module
 import (
 	"crypto/tls"
 	"errors"
+	"fmt"
 	"io"
 	"net/http"
 	"net/url"
@@ -85,11 +86,20 @@ func (ml ModuleLoader) read(modulename string) ([]byte, error) {
 		return data, err
 	}
 
+	verbose := ml.conf.Verbose
+	if verbose {
+		fmt.Println("Failed to resolve", modulename, "from current directory :", err)
+	}
+
 	modulePath := path.Join(ml.conf.RepoPath, modulename)
 	if !ml.conf.ForceDownload {
 		if data, err = os.ReadFile(modulePath); err == nil {
 			return data, nil
 		}
+
+		if verbose {
+			fmt.Println("Failed to resolve", modulename, "from", modulePath, ":", err)
+		}
 	}
 
 	moduleUrl, err := url.JoinPath(ml.conf.RepoUrl, modulename)