GOPATH is a multi-value environment variable

build/build_kubebuilder.sh

@@ -25,7 +25,7 @@ set -x
 OWNER="sigs.k8s.io"
 REPO="kubebuilder"
 
-GO_PKG_OWNER=$GOPATH/src/$OWNER
+GO_PKG_OWNER=${GOPATH/:*}/src/$OWNER
 GO_PKG_PATH=$GO_PKG_OWNER/$REPO
 
 mkdir -p $GO_PKG_OWNER

cmd/main.go

@@ -20,11 +20,11 @@ import (
 	gobuild "go/build"
 	"log"
 	"os"
-	"path/filepath"
-	"strings"
+	"regexp"
 
 	"github.com/spf13/cobra"
 
+	toolsutil "sigs.k8s.io/controller-tools/pkg/crd/util"
 	"sigs.k8s.io/kubebuilder/cmd/util"
 	"sigs.k8s.io/kubebuilder/cmd/version"
 )
@@ -34,18 +34,23 @@ func main() {
 	if len(gopath) == 0 {
 		gopath = gobuild.Default.GOPATH
 	}
-	util.GoSrc = filepath.Join(gopath, "src")
 
 	wd, err := os.Getwd()
 	if err != nil {
 		log.Fatal(err)
 	}
 
-	if !strings.HasPrefix(filepath.Dir(wd), util.GoSrc) {
+	if !toolsutil.IsUnderGoSrcPath(wd) {
 		log.Fatalf("kubebuilder must be run from the project root under $GOPATH/src/<package>. "+
 			"\nCurrent GOPATH=%s.  \nCurrent directory=%s", gopath, wd)
 	}
-	util.Repo = strings.Replace(wd, util.GoSrc+string(filepath.Separator), "", 1)
+	util.Repo, err = toolsutil.DirToGoPkg(wd)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	re := regexp.MustCompile(`(^.*\/src)(\/.*$)`)
+	util.GoSrc = re.ReplaceAllString(wd, "$1")
 
 	rootCmd := defaultCommand()
 

common.sh

@@ -41,6 +41,18 @@ cd "$base_dir" || {
   exit 1
 }
 
+go_workspace=''
+for p in ${GOPATH//:/ }; do
+  if [[ $PWD/ = $p/* ]]; then
+    go_workspace=$p
+  fi
+done
+
+if [ -z $go_workspace ]; then
+  echo 'Current directory is not in $GOPATH' >&2
+  exit 1
+fi
+
 # k8s_version=1.11.0
 k8s_version=1.13.1
 goarch=amd64
@@ -130,7 +142,7 @@ function build_kb {
 }
 
 function prepare_testdir_under_gopath {
-  kb_test_dir=$GOPATH/src/sigs.k8s.io/kubebuilder-test
+  kb_test_dir=${go_workspace}/src/sigs.k8s.io/kubebuilder-test
   header_text "preparing test directory $kb_test_dir"
   rm -rf "$kb_test_dir" && mkdir -p "$kb_test_dir" && cd "$kb_test_dir"
   header_text "running kubebuilder commands in test directory $kb_test_dir"

pkg/scaffold/project/project.go

@@ -76,20 +76,24 @@ func (Project) repoFromGopathAndWd(gopath string, getwd func() (string, error))
 	if len(gopath) == 0 {
 		gopath = build.Default.GOPATH
 	}
-	goSrc := filepath.Join(gopath, "src")
 
-	// Make sure the GOPATH is set and the working dir is under the GOPATH
-	if !strings.HasPrefix(filepath.Dir(wd), goSrc) {
-		return "", fmt.Errorf("working directory must be a project directory under "+
-			"$GOPATH/src/<project-package>\n- GOPATH=%s\n- WD=%s", gopath, wd)
-	}
+	for _, workspace := range filepath.SplitList(gopath) {
+		goSrc := filepath.Join(workspace, "src")
+
+		// Make sure the GOPATH is set and the working dir is under the GOPATH
+		if strings.HasPrefix(filepath.Dir(wd), goSrc) {
 
-	// Figure out the repo name by removing $GOPATH/src from the working directory - e.g.
-	// '$GOPATH/src/kubernetes-sigs/controller-tools' becomes 'kubernetes-sigs/controller-tools'
-	repo := ""
-	for wd != goSrc {
-		repo = filepath.Join(filepath.Base(wd), repo)
-		wd = filepath.Dir(wd)
+			// Figure out the repo name by removing $GOPATH/src from the working directory - e.g.
+			// '$GOPATH/src/kubernetes-sigs/controller-tools' becomes 'kubernetes-sigs/controller-tools'
+			repo := ""
+			for wd != goSrc {
+				repo = filepath.Join(filepath.Base(wd), repo)
+				wd = filepath.Dir(wd)
+			}
+			return repo, nil
+		}
 	}
-	return repo, nil
+
+	return "", fmt.Errorf("working directory must be a project directory under "+
+		"$GOPATH/src/<project-package>\n- GOPATH=%s\n- WD=%s", gopath, wd)
 }

test.sh

@@ -127,7 +127,7 @@ prepare_testdir_under_gopath
 dump_cache
 test_create_namespaced_coretype_controller
 
-cd $GOPATH/src/sigs.k8s.io/kubebuilder
+cd ${go_workspace}/src/sigs.k8s.io/kubebuilder
 
 go test ./cmd/... ./pkg/...