Build error formatting on fission spec apply --wait (#1403)

The character `\n` in buildlog stores in package status
are escaped and so when we have to replace them with
actual line breaker.

pkg/fission-cli/cmd/package/util/util.go

@@ -25,6 +25,7 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
+	"text/tabwriter"
 
 	"github.com/pkg/errors"
 	uuid "github.com/satori/go.uuid"
@@ -175,3 +176,15 @@ func DownloadStoragesvcURL(client *client.Client, fileUrl string) (io.ReadCloser
 
 	return reader, nil
 }
+
+// PrintPackageSummary prints package information and build logs.
+func PrintPackageSummary(writer io.Writer, pkg *fv1.Package) {
+	// replace escaped line breaker character
+	buildlog := strings.ReplaceAll(pkg.Status.BuildLog, `\n`, "\n")
+	w := tabwriter.NewWriter(writer, 0, 0, 1, ' ', 0)
+	fmt.Fprintf(w, "%v\t%v\n", "Name:", pkg.Metadata.Name)
+	fmt.Fprintf(w, "%v\t%v\n", "Environment:", pkg.Spec.Environment.Name)
+	fmt.Fprintf(w, "%v\t%v\n", "Status:", pkg.Status.BuildStatus)
+	fmt.Fprintf(w, "%v\n%v", "Build Logs:", buildlog)
+	w.Flush()
+}

pkg/fission-cli/cmd/package/util/util_test.go

@@ -0,0 +1,34 @@
+package util
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	fv1 "github.com/fission/fission/pkg/apis/fission.io/v1"
+)
+
+func TestPrintPackageSummary(t *testing.T) {
+
+	pkg := &fv1.Package{
+		Metadata: metav1.ObjectMeta{
+			Name:      "foobar",
+			Namespace: "dummy",
+		},
+		Status: fv1.PackageStatus{
+			BuildStatus: "failed",
+			BuildLog:    "dummy-build-log",
+		},
+	}
+
+	expected := `Name:        foobar\nEnvironment: \nStatus:      failed\nBuild Logs:\ndummy-build-log`
+	writer := &bytes.Buffer{}
+	PrintPackageSummary(writer, pkg)
+
+	gotWriter := strings.ReplaceAll(writer.String(), "\n", `\n`)
+	if gotWriter != expected {
+		t.Errorf("PrintPackageBuildLog() = %v, want %v", gotWriter, expected)
+	}
+}