Allow multiple distribution-id

This allows multiple values in `distribution-id`; add by repeating the flag with new values e.g.:

```bash
s3deploy -bucket=mybucket -distribution-id=abcd -distribution-id=efgh
```

Fixes #142

README.md

@@ -29,16 +29,15 @@ Note that `s3deploy` is a perfect tool to use with a continuous integration tool
 ## Use
 
 ```bash
-Usage of ./s3deploy:
   -V	print version and exit
   -acl string
     	provide an ACL for uploaded objects. to make objects public, set to 'public-read'. all possible values are listed here: https://docs.aws.amazon.com/AmazonS3/latest/userguide/acl-overview.html#canned-acl (default "private")
   -bucket string
     	destination bucket name on AWS
   -config string
     	optional config file (default ".s3deploy.yml")
-  -distribution-id string
-    	optional CDN distribution ID for cache invalidation
+  -distribution-id value
+    	optional CDN distribution ID for cache invalidation, repeat flag for multiple distributions
   -force
     	upload even if the etags match
   -h	help

lib/cloudfront.go

@@ -21,8 +21,8 @@ import (
 var _ remoteCDN = (*cloudFrontClient)(nil)
 
 type cloudFrontClient struct {
-	// The CloudFront distribution ID
-	distributionID string
+	// The CloudFront distribution IDs
+	distributionIDs Strings
 
 	// Will invalidate the entire cache, e.g. "/*"
 	force      bool
@@ -36,15 +36,15 @@ func newCloudFrontClient(
 	sess *session.Session,
 	logger printer,
 	cfg Config) (*cloudFrontClient, error) {
-	if cfg.CDNDistributionID == "" {
-		return nil, errors.New("must provide a distribution ID")
+	if len(cfg.CDNDistributionIDs) == 0 {
+		return nil, errors.New("must provide one or more distribution ID")
 	}
 	return &cloudFrontClient{
-		distributionID: cfg.CDNDistributionID,
-		force:          cfg.Force,
-		bucketPath:     cfg.BucketPath,
-		logger:         logger,
-		cf:             cloudfront.New(sess),
+		distributionIDs: cfg.CDNDistributionIDs,
+		force:           cfg.Force,
+		bucketPath:      cfg.BucketPath,
+		logger:          logger,
+		cf:              cloudfront.New(sess),
 	}, nil
 }
 
@@ -53,47 +53,57 @@ func (c *cloudFrontClient) InvalidateCDNCache(paths ...string) error {
 		return nil
 	}
 
-	dcfg, err := c.cf.GetDistribution(&cloudfront.GetDistributionInput{
-		Id: &c.distributionID,
-	})
-	if err != nil {
-		return err
-	}
+	invalidateForID := func(id string) error {
+		dcfg, err := c.cf.GetDistribution(&cloudfront.GetDistributionInput{
+			Id: &id,
+		})
+		if err != nil {
+			return err
+		}
 
-	originPath := *dcfg.Distribution.DistributionConfig.Origins.Items[0].OriginPath
-	var root string
-	if originPath != "" || c.bucketPath != "" {
-		var subPath string
-		root, subPath = c.determineRootAndSubPath(c.bucketPath, originPath)
-		if subPath != "" {
-			for i, p := range paths {
-				paths[i] = strings.TrimPrefix(p, subPath)
+		originPath := *dcfg.Distribution.DistributionConfig.Origins.Items[0].OriginPath
+		var root string
+		if originPath != "" || c.bucketPath != "" {
+			var subPath string
+			root, subPath = c.determineRootAndSubPath(c.bucketPath, originPath)
+			if subPath != "" {
+				for i, p := range paths {
+					paths[i] = strings.TrimPrefix(p, subPath)
+				}
 			}
 		}
-	}
 
-	// This will try to reduce the number of invaldation paths to maximum 8.
-	// If that isn't possible it will fall back to a full invalidation, e.g. "/*".
-	// CloudFront allows 1000 free invalidations per month. After that they
-	// cost money, so we want to keep this down.
-	paths = c.normalizeInvalidationPaths(root, 8, c.force, paths...)
+		// This will try to reduce the number of invaldation paths to maximum 8.
+		// If that isn't possible it will fall back to a full invalidation, e.g. "/*".
+		// CloudFront allows 1000 free invalidations per month. After that they
+		// cost money, so we want to keep this down.
+		paths = c.normalizeInvalidationPaths(root, 8, c.force, paths...)
 
-	if len(paths) > 10 {
-		c.logger.Printf("Create CloudFront invalidation request for %d paths", len(paths))
-	} else {
-		c.logger.Printf("Create CloudFront invalidation request for %v", paths)
-	}
+		if len(paths) > 10 {
+			c.logger.Printf("Create CloudFront invalidation request for %d paths", len(paths))
+		} else {
+			c.logger.Printf("Create CloudFront invalidation request for %v", paths)
+		}
+
+		in := &cloudfront.CreateInvalidationInput{
+			DistributionId:    &id,
+			InvalidationBatch: c.pathsToInvalidationBatch(time.Now().Format("20060102150405"), paths...),
+		}
+
+		_, err = c.cf.CreateInvalidation(
+			in,
+		)
 
-	in := &cloudfront.CreateInvalidationInput{
-		DistributionId:    &c.distributionID,
-		InvalidationBatch: c.pathsToInvalidationBatch(time.Now().Format("20060102150405"), paths...),
+		return err
 	}
 
-	_, err = c.cf.CreateInvalidation(
-		in,
-	)
+	for _, id := range c.distributionIDs {
+		if err := invalidateForID(id); err != nil {
+			return err
+		}
+	}
 
-	return err
+	return nil
 }
 
 func (*cloudFrontClient) pathsToInvalidationBatch(ref string, paths ...string) *cloudfront.InvalidationBatch {
@@ -136,7 +146,6 @@ func (c *cloudFrontClient) determineRootAndSubPath(bucketPath, originPath string
 	}
 
 	return
-
 }
 
 // For path rules, see https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Invalidation.html

lib/cloudfront_test.go

@@ -61,7 +61,6 @@ func TestReduceInvalidationPaths(t *testing.T) {
 	assert.Equal([]string{"/*"}, normalized)
 	normalized = client.normalizeInvalidationPaths("root", 5, true, rootPlusManyInDifferentFoldersNested...)
 	assert.Equal([]string{"/root/*"}, normalized)
-
 }
 
 func TestDetermineRootAndSubPath(t *testing.T) {
@@ -80,7 +79,6 @@ func TestDetermineRootAndSubPath(t *testing.T) {
 	check("/temp/forsale/", "temp", "/forsale", "temp")
 	check("root", "root", "/", "root")
 	check("root", "/root", "/", "root")
-
 }
 
 func TestPathsToInvalidationBatch(t *testing.T) {
@@ -99,13 +97,13 @@ func TestNewCloudFrontClient(t *testing.T) {
 	assert := require.New(t)
 	s := mock.Session
 	c, err := newCloudFrontClient(s, newPrinter(ioutil.Discard), Config{
-		CDNDistributionID: "12345",
-		Force:             true,
-		BucketPath:        "/mypath",
+		CDNDistributionIDs: Strings{"12345"},
+		Force:              true,
+		BucketPath:         "/mypath",
 	})
 	assert.NoError(err)
 	assert.NotNil(c)
-	assert.Equal("12345", c.distributionID)
+	assert.Equal("12345", c.distributionIDs[0])
 	assert.Equal("/mypath", c.bucketPath)
 	assert.Equal(true, c.force)
 }

lib/config.go

@@ -15,6 +15,17 @@ import (
 	"strings"
 )
 
+type Strings []string
+
+func (i *Strings) String() string {
+	return strings.Join(*i, ",")
+}
+
+func (i *Strings) Set(value string) error {
+	*i = append(*i, value)
+	return nil
+}
+
 // Config configures a deployment.
 type Config struct {
 	conf fileConfig
@@ -29,8 +40,8 @@ type Config struct {
 	BucketPath string
 	RegionName string
 
-	// When set, will invalidate the CDN cache for the updated files.
-	CDNDistributionID string
+	// When set, will invalidate the CDN cache(s) for the updated files.
+	CDNDistributionIDs Strings
 
 	// Optional configFile
 	ConfigFile string
@@ -70,7 +81,7 @@ func flagsToConfig(f *flag.FlagSet) (*Config, error) {
 	f.StringVar(&cfg.BucketName, "bucket", "", "destination bucket name on AWS")
 	f.StringVar(&cfg.BucketPath, "path", "", "optional bucket sub path")
 	f.StringVar(&cfg.SourcePath, "source", ".", "path of files to upload")
-	f.StringVar(&cfg.CDNDistributionID, "distribution-id", "", "optional CDN distribution ID for cache invalidation")
+	f.Var(&cfg.CDNDistributionIDs, "distribution-id", "optional CDN distribution ID for cache invalidation, repeat flag for multiple distributions")
 	f.StringVar(&cfg.ConfigFile, "config", ".s3deploy.yml", "optional config file")
 	f.IntVar(&cfg.MaxDelete, "max-delete", 256, "maximum number of files to delete per deploy")
 	f.BoolVar(&cfg.PublicReadACL, "public-access", false, "DEPRECATED: please set -acl='public-read'")

lib/config_test.go

@@ -47,7 +47,7 @@ func TestFlagsToConfig(t *testing.T) {
 	assert.Equal("mysource", cfg.SourcePath)
 	assert.Equal(true, cfg.Try)
 	assert.Equal("myregion", cfg.RegionName)
-	assert.Equal("mydistro", cfg.CDNDistributionID)
+	assert.Equal(Strings{"mydistro"}, cfg.CDNDistributionIDs)
 	assert.Equal("^ignored-prefix.*", cfg.Ignore)
 }
 

lib/s3.go

@@ -53,7 +53,7 @@ func newRemoteStore(cfg Config, logger printer) (*s3Store, error) {
 		return nil, err
 	}
 
-	if cfg.CDNDistributionID != "" {
+	if len(cfg.CDNDistributionIDs) > 0 {
 		cfc, err = newCloudFrontClient(sess, logger, cfg)
 		if err != nil {
 			return nil, err
@@ -70,7 +70,6 @@ func newRemoteStore(cfg Config, logger printer) (*s3Store, error) {
 	s = &s3Store{svc: s3.New(sess), cfc: cfc, acl: acl, bucket: cfg.BucketName, r: cfg.conf.Routes, bucketPath: cfg.BucketPath}
 
 	return s, nil
-
 }
 
 func (s *s3Store) FileMap(opts ...opOption) (map[string]file, error) {
@@ -93,7 +92,6 @@ func (s *s3Store) FileMap(opts ...opOption) (map[string]file, error) {
 }
 
 func (s *s3Store) Put(ctx context.Context, f localFile, opts ...opOption) error {
-
 	headers := f.Headers()
 
 	withHeaders := func(r *request.Request) {