feat: CCIE-180 allow running 'fogg init' with flags instead of realti…

…me user prompts (#693)

cmd/init.go

@@ -5,14 +5,91 @@ import (
 
 	"github.com/chanzuckerberg/fogg/errs"
 	fogg_init "github.com/chanzuckerberg/fogg/init"
+	prompt "github.com/segmentio/go-prompt"
 	"github.com/spf13/afero"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 )
 
+type FoggProject = fogg_init.FoggProject
+
 func init() {
+	initCmd.Flags().String("project", "", "Use this to pass the project name via CLI.")
+	initCmd.Flags().String("region", "", "Use this to pass the aws region via CLI.")
+	initCmd.Flags().String("bucket", "", "Use this to pass the infra bucket name via CLI.")
+	initCmd.Flags().String("table", "", "Use this to pass the infra dynamo table name via CLI.")
+	initCmd.Flags().String("profile", "", "Use this to pass the aws auth profile via CLI.")
+	initCmd.Flags().String("owner", "", "Use this to pass the owner name via CLI.")
 	rootCmd.AddCommand(initCmd)
 }
 
+func isFlagPassed(cmd *cobra.Command, name string) bool {
+	found := false
+	cmd.Flags().Visit(func(f *pflag.Flag) {
+		if f.Name == name {
+			found = true
+		}
+	})
+	return found
+}
+
+func userPrompt(cmd *cobra.Command) (*FoggProject, error) {
+	foggProject := new(FoggProject)
+	var err error
+
+	foggProject.Project, err = cmd.Flags().GetString("project")
+	if err != nil {
+		return nil, err
+	}
+	if foggProject.Project == "" {
+		foggProject.Project = prompt.StringRequired("project name?")
+	}
+
+	foggProject.Region, err = cmd.Flags().GetString("region")
+	if err != nil {
+		return nil, err
+	}
+	if foggProject.Region == "" {
+		foggProject.Region = prompt.StringRequired("aws region?")
+	}
+
+	foggProject.Bucket, err = cmd.Flags().GetString("bucket")
+	if err != nil {
+		return nil, err
+	}
+	if foggProject.Bucket == "" {
+		foggProject.Bucket = prompt.StringRequired("infra bucket name?")
+	}
+
+	foggProject.Table, err = cmd.Flags().GetString("table")
+	if err != nil {
+		return nil, err
+	}
+	// check whether the flag was passed for table because table isn't required
+	// so this allows passing empty string to bypass the user prompt
+	if foggProject.Table == "" && !isFlagPassed(cmd, "table") {
+		foggProject.Table = prompt.String("infra dynamo table name?")
+	}
+
+	foggProject.Profile, err = cmd.Flags().GetString("profile")
+	if err != nil {
+		return nil, err
+	}
+	if foggProject.Profile == "" {
+		foggProject.Profile = prompt.StringRequired("auth profile?")
+	}
+
+	foggProject.Owner, err = cmd.Flags().GetString("owner")
+	if err != nil {
+		return nil, err
+	}
+	if foggProject.Owner == "" {
+		foggProject.Owner = prompt.StringRequired("owner?")
+	}
+
+	return foggProject, nil
+}
+
 var initCmd = &cobra.Command{
 	Use:   "init",
 	Short: "Initialize a new repo for use with fogg",
@@ -27,6 +104,11 @@ var initCmd = &cobra.Command{
 		// check that we are at root of initialized git repo
 		openGitOrExit(fs)
 
-		return fogg_init.Init(fs)
+		foggProject, err := userPrompt(cmd)
+		if err != nil {
+			return err
+		}
+
+		return fogg_init.Init(fs, foggProject)
 	},
 }

init/init.go

@@ -2,27 +2,26 @@ package init
 
 import (
 	"github.com/chanzuckerberg/fogg/config"
-	prompt "github.com/segmentio/go-prompt"
 	"github.com/spf13/afero"
 )
 
 const AWSProviderVersion = "2.47.0"
 
-func userPrompt() (string, string, string, string, string, string) {
-	project := prompt.StringRequired("project name?")
-	region := prompt.StringRequired("aws region?")
-	bucket := prompt.StringRequired("infra bucket name?")
-	table := prompt.String("infra dynamo table name?")
-	profile := prompt.StringRequired("auth profile?")
-	owner := prompt.StringRequired("owner?")
-
-	return project, region, bucket, table, profile, owner
+type FoggProject struct {
+	Project, Region, Bucket, Table, Profile, Owner string
 }
 
 //Init reads user console input and generates a fogg.yml file
-func Init(fs afero.Fs) error {
-	project, region, bucket, table, profile, owner := userPrompt()
-	config := config.InitConfig(project, region, bucket, table, profile, owner, AWSProviderVersion)
+func Init(fs afero.Fs, foggProject *FoggProject) error {
+	config := config.InitConfig(
+		foggProject.Project,
+		foggProject.Region,
+		foggProject.Bucket,
+		foggProject.Table,
+		foggProject.Profile,
+		foggProject.Owner,
+		AWSProviderVersion,
+	)
 	e := config.Write(fs, "fogg.yml")
 	return e
 }