Merge pull request #39 from convox/cmd-service

add service cmd

cmd/service/Makefile

@@ -0,0 +1,7 @@
+.PHONY: all test
+
+all: test
+
+test:
+	go get -t ./...
+	go test -v -cover ./...

cmd/service/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/convox/rack/api/models"
+)
+
+func die(err error) {
+	fmt.Fprintf(os.Stderr, "ERROR: %s\n", err.Error())
+	os.Exit(1)
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Fprintf(os.Stderr, "usage: service <type>\n")
+		os.Exit(1)
+	}
+
+	service := models.Service{Type: os.Args[1]}
+
+	out, err := service.Formation()
+
+	if err != nil && strings.HasSuffix(err.Error(), "not found") {
+		die(fmt.Errorf("no such service type: %s", service.Type))
+	}
+
+	if err != nil {
+		die(err)
+	}
+
+	fmt.Println(out)
+}