feat(client): use unix pipes with config:push

client/cmd/config.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"bytes"
 	"encoding/base64"
 	"fmt"
 	"io/ioutil"
@@ -202,13 +203,22 @@ func ConfigPull(appID string, interactive bool, overwrite bool) error {
 }
 
 // ConfigPush pushes an app's config from a file.
-func ConfigPush(appID string, fileName string) error {
-	contents, err := ioutil.ReadFile(fileName)
+func ConfigPush(appID string) error {
+	stat, err := os.Stdin.Stat()
 
 	if err != nil {
 		return err
 	}
 
+	if (stat.Mode() & os.ModeCharDevice) != 0 {
+		fmt.Println(`No file input. ex: 'deis config:push < filename'.
+See 'deis help config:push' for more information`)
+	}
+
+	buffer := new(bytes.Buffer)
+	buffer.ReadFrom(os.Stdin)
+	contents := buffer.String()
+
 	config := strings.Split(string(contents), "\n")
 	return ConfigSet(appID, config[:len(config)-1])
 }

client/parser/config.go

@@ -153,15 +153,14 @@ func configPush(argv []string) error {
 Sets environment variables for an application.
 
 The environment is read from <path>. This file can be read by foreman
-to load the local environment for your app.
+to load the local environment for your app. The file should be piped via
+stdin, for example 'deis config:push < .env'
 
 Usage: deis config:push [options]
 
 Options:
   -a --app=<app>
     the uniquely identifiable name for the application.
-  -p <path>, --path=<path>
-    a path leading to an environment file [default: .env]
 `
 
 	args, err := docopt.Parse(usage, argv, true, "", false, true)
@@ -170,5 +169,5 @@ Options:
 		return err
 	}
 
-	return cmd.ConfigPush(safeGetValue(args, "--app"), safeGetValue(args, "--path"))
+	return cmd.ConfigPush(safeGetValue(args, "--app"))
 }