Merge pull request #152 from fujiwara/alias-to-latest

add --alias-to-latest option to deploy command.

README.md

@@ -183,18 +183,24 @@ usage: lambroll deploy [<flags>]
 deploy or create function
 
 Flags:
+  --help                      Show context-sensitive help (also try --help-long
+                              and --help-man).
+  --log-level=info            log level (trace, debug, info, warn, error)
   --function="function.json"  Function file path
-  --profile="$AWS_PROFILE"    AWS credential profile name
-  --region="$AWS_REGION"      AWS region
+  --profile=""                AWS credential profile name
+  --region=""                 AWS region
   --tfstate=""                URL to terraform.tfstate
   --endpoint=""               AWS API Lambda Endpoint
+  --envfile=ENVFILE ...       environment files
   --src="."                   function zip archive or src dir
-  --exclude-file=".lambdaignore"
+  --exclude-file=".lambdaignore"  
                               exclude file
   --dry-run                   dry run
   --publish                   publish function
   --alias="current"           alias name for publish
-  --skip-archive              skip to create zip archive. requires Code.S3Bucket and Code.S3Key in function definition
+  --alias-to-latest           set alias to unpublished $LATEST version
+  --skip-archive              skip to create zip archive. requires Code.S3Bucket
+                              and Code.S3Key in function definition
 ```
 
 `deploy` works as below.

cmd/lambroll/main.go

@@ -47,6 +47,7 @@ func _main() int {
 		DryRun:           deploy.Flag("dry-run", "dry run").Bool(),
 		Publish:          deploy.Flag("publish", "publish function").Default("true").Bool(),
 		AliasName:        deploy.Flag("alias", "alias name for publish").Default(lambroll.CurrentAliasName).String(),
+		AliasToLatest:    deploy.Flag("alias-to-latest", "set alias to unpublished $LATEST version").Default("false").Bool(),
 		SkipArchive:      deploy.Flag("skip-archive", "skip to create zip archive. requires Code.S3Bucket and Code.S3Key in function definition").Default("false").Bool(),
 	}
 

deploy.go

@@ -22,6 +22,7 @@ type DeployOption struct {
 	ExcludeFile      *string
 	Publish          *bool
 	AliasName        *string
+	AliasToLatest    *bool
 	DryRun           *bool
 	SkipArchive      *bool
 }
@@ -152,13 +153,16 @@ func (app *App) Deploy(opt DeployOption) error {
 		newerVersion = *res.Version
 		log.Printf("[info] deployed version %s %s", *res.Version, opt.label())
 	} else {
-		log.Println("[info] deployed")
+		newerVersion = versionLatest
+		log.Printf("[info] deployed version %s %s", newerVersion, opt.label())
 	}
-	if *opt.DryRun || !*opt.Publish {
+	if *opt.DryRun {
 		return nil
 	}
-
-	return app.updateAliases(*fn.FunctionName, versionAlias{newerVersion, *opt.AliasName})
+	if *opt.Publish || *opt.AliasToLatest {
+		return app.updateAliases(*fn.FunctionName, versionAlias{newerVersion, *opt.AliasName})
+	}
+	return nil
 }
 
 func (app *App) updateFunctionCodeWithRetry(ctx context.Context, in *lambda.UpdateFunctionCodeInput) (*lambda.FunctionConfiguration, error) {

lambroll.go

@@ -18,6 +18,8 @@ import (
 	"github.com/shogo82148/go-retry"
 )
 
+const versionLatest = "$LATEST"
+
 var retryPolicy = retry.Policy{
 	MinDelay: time.Second,
 	MaxDelay: 5 * time.Second,