Add hugo env command

Useful for bug reports.

Fixes #2523

commands/env.go

@@ -0,0 +1,35 @@
+// Copyright 2016 The Hugo Authors. All rights reserved.
+//
+// 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 commands
+
+import (
+	"fmt"
+	"runtime"
+
+	"github.com/spf13/cobra"
+)
+
+var envCmd = &cobra.Command{
+	Use:   "env",
+	Short: "Print Hugo version and environment info",
+	Long:  `Print Hugo version and environment info. This is useful in Hugo bug reports.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		printHugoVersion()
+		fmt.Printf("GOOS=%q\n", runtime.GOOS)
+		fmt.Printf("GOARCH=%q\n", runtime.GOARCH)
+		fmt.Printf("GOVERSION=%q\n", runtime.Version())
+
+		return nil
+	},
+}