fix creating abs path for urls

cmd/executor/cmd/root.go

@@ -168,7 +168,7 @@ func cacheFlagsValid() error {
 
 // resolveDockerfilePath resolves the Dockerfile path to an absolute path
 func resolveDockerfilePath() error {
-	if match, _ := regexp.MatchString("^https?://", opts.DockerfilePath); match {
+	if isUrl(opts.DockerfilePath) {
 		return nil
 	}
 	if util.FilepathExists(opts.DockerfilePath) {
@@ -241,13 +241,8 @@ func resolveRelativePaths() error {
 	}
 
 	for _, p := range optsPaths {
-		// Skip empty path
+		if path := *p; skipPath(path) {
-		if *p == "" {
+			logrus.Debugf("Skip resolving path %s", path)
-			continue
-		}
-		// Skip path that is already absolute
-		if filepath.IsAbs(*p) {
-			logrus.Debugf("Path %s is absolute, skipping", *p)
 			continue
 		}
 
@@ -266,3 +261,14 @@ func exit(err error) {
 	fmt.Println(err)
 	os.Exit(1)
 }
+
+func isUrl(path string) bool {
+	if match, _ := regexp.MatchString("^https?://", path); match {
+		return true
+	}
+	return false
+}
+
+func skipPath(path string) bool {
+	return path == "" || isUrl(path) || filepath.IsAbs(path)
+}

cmd/executor/cmd/root_test.go

@@ -0,0 +1,99 @@
+/*
+Copyright 2018 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"testing"
+
+	"github.com/GoogleContainerTools/kaniko/testutil"
+)
+
+func TestSkipPath(t *testing.T) {
+	tests := []struct {
+		description string
+		path        string
+		expected    bool
+	}{
+		{
+			description: "path is a http url",
+			path:        "http://test",
+			expected:    true,
+		},
+		{
+			description: "path is a https url",
+			path:        "https://test",
+			expected:    true,
+		},
+		{
+			description: "path is a empty",
+			path:        "",
+			expected:    true,
+		},
+		{
+			description: "path is already abs",
+			path:        "/tmp/test",
+			expected:    true,
+		},
+		{
+			description: "path is relative",
+			path:        ".././test",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.description, func(t *testing.T) {
+			testutil.CheckDeepEqual(t, tt.expected, skipPath(tt.path))
+		})
+	}
+}
+
+func TestIsUrl(t *testing.T) {
+	tests := []struct {
+		description string
+		path        string
+		expected    bool
+	}{
+		{
+			description: "path is a http url",
+			path:        "http://test",
+			expected:    true,
+		},
+		{
+			description: "path is a https url",
+			path:        "https://test",
+			expected:    true,
+		},
+		{
+			description: "path is a empty",
+			path:        "",
+		},
+		{
+			description: "path is already abs",
+			path:        "/tmp/test",
+		},
+		{
+			description: "path is relative",
+			path:        ".././test",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.description, func(t *testing.T) {
+			testutil.CheckDeepEqual(t, tt.expected, isUrl(tt.path))
+		})
+	}
+}