Auto-update dependencies (#74)

Produced via:
  `dep ensure -update knative.dev/test-infra knative.dev/pkg`
/assign @mattmoor

Gopkg.lock

@@ -927,7 +927,7 @@
 
 [[projects]]
   branch = "master"
-  digest = "1:4ad65001bd7667eebd1c0e32c4c166cad0ddbc71015195887f9942458ff19012"
+  digest = "1:9d7c900ebc70071471915d9cb9eecc67039ded90c553bfb985a45c06555ff864"
   name = "knative.dev/pkg"
   packages = [
     "apis",
@@ -946,7 +946,7 @@
     "metrics/metricskey",
   ]
   pruneopts = "T"
-  revision = "d3c17af1d97a4dd7f0167628df312f1e9889f444"
+  revision = "7e6f1f48c9c4cdb1a3a09628986e7e706c82ceab"
 
 [[projects]]
   branch = "master"
@@ -957,7 +957,7 @@
     "tools/dep-collector",
   ]
   pruneopts = "UT"
-  revision = "aa17edaa3b0d03edfb5c9cba8422e8151d759fad"
+  revision = "3543363d1b8d074deaa57081a53af9113074eeda"
 
 [solve-meta]
   analyzer-name = "dep"

vendor/knative.dev/pkg/changeset/commit.go

@@ -30,9 +30,7 @@ const (
 	koDataPathEnvName = "KO_DATA_PATH"
 )
 
-var (
-	commitIDRE = regexp.MustCompile(`^[a-f0-9]{40}$`)
-)
+var commitIDRE = regexp.MustCompile(`^[a-f0-9]{40}$`)
 
 // Get tries to fetch the first 7 digitals of GitHub commit ID from HEAD file in
 // KO_DATA_PATH. If it fails, it returns the error it gets.
@@ -42,11 +40,17 @@ func Get() (string, error) {
 		return "", err
 	}
 	commitID := strings.TrimSpace(string(data))
-	if !commitIDRE.MatchString(commitID) {
-		err := fmt.Errorf("%q is not a valid GitHub commit ID", commitID)
-		return "", err
+	if rID := strings.TrimPrefix(commitID, "ref: "); rID != commitID {
+		data, err := readFileFromKoData(rID)
+		if err != nil {
+			return "", err
+		}
+		commitID = strings.TrimSpace(string(data))
 	}
-	return string(commitID[0:7]), nil
+	if commitIDRE.MatchString(commitID) {
+		return commitID[:7], nil
+	}
+	return "", fmt.Errorf("%q is not a valid GitHub commit ID", commitID)
 }
 
 // readFileFromKoData tries to read data as string from the file with given name
@@ -56,9 +60,7 @@ func Get() (string, error) {
 func readFileFromKoData(filename string) ([]byte, error) {
 	koDataPath := os.Getenv(koDataPathEnvName)
 	if koDataPath == "" {
-		err := fmt.Errorf("%q does not exist or is empty", koDataPathEnvName)
-		return nil, err
+		return nil, fmt.Errorf("%q does not exist or is empty", koDataPathEnvName)
 	}
-	fullFilename := filepath.Join(koDataPath, filename)
-	return ioutil.ReadFile(fullFilename)
+	return ioutil.ReadFile(filepath.Join(koDataPath, filename))
 }

vendor/knative.dev/pkg/changeset/testdata/garbage/HEAD

@@ -0,0 +1 @@
+garbage contents

vendor/knative.dev/pkg/changeset/testdata/with-refs/HEAD

@@ -0,0 +1 @@
+ref: refs/heads/branch-name

vendor/knative.dev/pkg/changeset/testdata/with-refs/refs/heads/branch-name

@@ -0,0 +1 @@
+a2d1bdfe929516d7da141aef68631a7ee6941b2d