Display environment list output in json (#1444)

Author: vishalbollu

cli/cmd/env.go

@@ -18,9 +18,12 @@ package cmd
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/cortexlabs/cortex/cli/types/cliconfig"
+	"github.com/cortexlabs/cortex/cli/types/flags"
 	"github.com/cortexlabs/cortex/pkg/lib/exit"
+	libjson "github.com/cortexlabs/cortex/pkg/lib/json"
 	"github.com/cortexlabs/cortex/pkg/lib/print"
 	"github.com/cortexlabs/cortex/pkg/lib/telemetry"
 	"github.com/cortexlabs/cortex/pkg/types"
@@ -45,6 +48,7 @@ func envInit() {
 	_envCmd.AddCommand(_envConfigureCmd)
 
 	_envListCmd.Flags().SortFlags = false
+	_envListCmd.Flags().VarP(&_flagOutput, "output", "o", fmt.Sprintf("output format: one of %s", strings.Join(flags.OutputTypeStrings(), "|")))
 	_envCmd.AddCommand(_envListCmd)
 
 	_envDefaultCmd.Flags().SortFlags = false
@@ -125,6 +129,15 @@ var _envListCmd = &cobra.Command{
 			exit.Error(err)
 		}
 
+		if _flagOutput == flags.JSONOutputType {
+			bytes, err := libjson.Marshal(cliConfig.Environments)
+			if err != nil {
+				exit.Error(err)
+			}
+			fmt.Println(string(bytes))
+			return
+		}
+
 		defaultEnv := getDefaultEnv(_generalCommandType)
 
 		for i, env := range cliConfig.Environments {

docs/miscellaneous/cli.md

@@ -148,12 +148,14 @@ Usage:
   cortex cluster configure [flags]
 
 Flags:
-  -c, --config string       path to a cluster configuration file
-      --aws-key string      aws access key id
-      --aws-secret string   aws secret access key
-  -e, --env string          environment to update (default "aws")
-  -y, --yes                 skip prompts
-  -h, --help                help for configure
+  -c, --config string               path to a cluster configuration file
+      --aws-key string              aws access key id
+      --aws-secret string           aws secret access key
+      --cluster-aws-key string      aws access key id to be used by the cluster
+      --cluster-aws-secret string   aws secret access key to be used by the cluster
+  -e, --env string                  environment to update (default "aws")
+  -y, --yes                         skip prompts
+  -h, --help                        help for configure
 ```
 
 ### cluster export
@@ -213,7 +215,8 @@ Usage:
   cortex env list [flags]
 
 Flags:
-  -h, --help   help for list
+  -o, --output string   output format: one of pretty|json (default "pretty")
+  -h, --help            help for list
 ```
 
 ### env default