Don’t assume bazel-bin is symlinked in workspace

Fix #1339

Signed-off-by: David Gageot <david@gageot.net>

pkg/skaffold/build/local/bazel.go

@@ -27,6 +27,7 @@ import (
 
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/docker"
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/schema/latest"
+	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/util"
 	"github.com/pkg/errors"
 )
 
@@ -46,7 +47,12 @@ func (b *Builder) buildBazel(ctx context.Context, out io.Writer, workspace strin
 	tarPath := buildTarPath(a.BuildTarget)
 	imageTag := buildImageTag(a.BuildTarget)
 
-	imageTar, err := os.Open(filepath.Join(workspace, "bazel-bin", tarPath))
+	bazelBin, err := bazelBin(ctx, workspace)
+	if err != nil {
+		return "", errors.Wrap(err, "getting path of bazel-bin")
+	}
+
+	imageTar, err := os.Open(filepath.Join(bazelBin, tarPath))
 	if err != nil {
 		return "", errors.Wrap(err, "opening image tarball")
 	}
@@ -66,6 +72,18 @@ func (b *Builder) buildBazel(ctx context.Context, out io.Writer, workspace strin
 	return fmt.Sprintf("bazel%s", imageTag), nil
 }
 
+func bazelBin(ctx context.Context, workspace string) (string, error) {
+	cmd := exec.CommandContext(ctx, "bazel", "info", "bazel-bin")
+	cmd.Dir = workspace
+
+	buf, err := util.RunCmdOut(cmd)
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(string(buf)), nil
+}
+
 func trimTarget(buildTarget string) string {
 	//TODO(r2d4): strip off leading //:, bad
 	trimmedTarget := strings.TrimPrefix(buildTarget, "//")

pkg/skaffold/build/local/bazel_test.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2018 The Skaffold Authors
+
+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 local
+
+import (
+	"context"
+	"testing"
+
+	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/util"
+	"github.com/GoogleContainerTools/skaffold/testutil"
+)
+
+func TestBazelBin(t *testing.T) {
+	defer func(c util.Command) { util.DefaultExecCommand = c }(util.DefaultExecCommand)
+	util.DefaultExecCommand = testutil.NewFakeCmdOut(
+		"bazel info bazel-bin",
+		"/absolute/path/bin\n",
+		nil,
+	)
+
+	bazelBin, err := bazelBin(context.Background(), ".")
+
+	testutil.CheckErrorAndDeepEqual(t, false, err, "/absolute/path/bin", bazelBin)
+}