From c76c12721f37d95c425e89e0e4dba6648e2775e3 Mon Sep 17 00:00:00 2001
From: Carlos Alexandro Becker <caarlos0@gmail.com>
Date: Thu, 29 Dec 2016 14:12:54 -0200
Subject: [PATCH] multiple builds

---
 build/build.go | 57 ++++++++++++++++++++++++++++++--------------------
 glide.lock     | 10 +++++++--
 glide.yaml     |  3 +++
 3 files changed, 45 insertions(+), 25 deletions(-)

diff --git a/build/build.go b/build/build.go
index fac3226f2..4976df269 100644
--- a/build/build.go
+++ b/build/build.go
@@ -2,42 +2,53 @@ package build
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"os"
 	"os/exec"
 
 	"github.com/goreleaser/releaser/config"
 	"github.com/goreleaser/releaser/uname"
+	"golang.org/x/sync/errgroup"
 )
 
 func Build(version string, config config.ProjectConfig) error {
+	var g errgroup.Group
 	for _, bos := range config.Build.Oses {
 		for _, arch := range config.Build.Arches {
-			fmt.Println("Building", bos+"/"+arch, "...")
-			cmd := exec.Command(
-				"go",
-				"build",
-				"-ldflags=-s -w -X main.version="+version,
-				"-o", target(bos, arch, config.BinaryName),
-				config.Build.Main,
-			)
-			cmd.Env = append(
-				cmd.Env,
-				"GOOS="+bos,
-				"GOARCH="+arch,
-				"GOROOT="+os.Getenv("GOROOT"),
-				"GOPATH="+os.Getenv("GOPATH"),
-			)
-			var stdout bytes.Buffer
-			cmd.Stdout = &stdout
-			cmd.Stderr = &stdout
-			err := cmd.Run()
-			if err != nil {
-				fmt.Println(stdout.String())
-				return err
-			}
+			bos := bos
+			arch := arch
+			g.Go(func() error {
+				return build(bos, arch, version, config)
+			})
 		}
 	}
+	return g.Wait()
+}
+
+func build(bos, arch, version string, config config.ProjectConfig) error {
+	fmt.Println("Building", bos+"/"+arch, "...")
+	cmd := exec.Command(
+		"go",
+		"build",
+		"-ldflags=-s -w -X main.version="+version,
+		"-o", target(bos, arch, config.BinaryName),
+		config.Build.Main,
+	)
+	cmd.Env = append(
+		cmd.Env,
+		"GOOS="+bos,
+		"GOARCH="+arch,
+		"GOROOT="+os.Getenv("GOROOT"),
+		"GOPATH="+os.Getenv("GOPATH"),
+	)
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stdout
+	err := cmd.Run()
+	if err != nil {
+		return errors.New(stdout.String())
+	}
 	return nil
 }
 
diff --git a/glide.lock b/glide.lock
index e3bbbb7d4..0b890c8a0 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,5 +1,5 @@
-hash: d994e2b869e9f8e43e94f45a805e7443c459a8357f4d0935c4c96171bb54265f
-updated: 2016-12-28T23:26:07.891361125-02:00
+hash: 99aa967804549d50c1b897c28c555c0bb10a3045f68b3024f926758be9d0a5f8
+updated: 2016-12-29T14:09:53.896252195-02:00
 imports:
 - name: github.com/golang/protobuf
   version: df1d3ca07d2d07bba352d5b73c4313b4e2a6203e
@@ -13,6 +13,8 @@ imports:
   version: 9235644dd9e52eeae6fa48efd539fdc351a0af53
   subpackages:
   - query
+- name: github.com/pkg/errors
+  version: 248dadf4e9068a0b3e79f02ed0a610d935de5302
 - name: golang.org/x/net
   version: 6d3beaea10370160dea67f5c9327ed791afd5389
   subpackages:
@@ -21,6 +23,10 @@ imports:
   version: 1e695b1c8febf17aad3bfa7bf0a819ef94b98ad5
   subpackages:
   - internal
+- name: golang.org/x/sync
+  version: 316e794f7b5e3df4e95175a45a5fb8b12f85cb4f
+  subpackages:
+  - errgroup
 - name: google.golang.org/appengine
   version: 3f4dbbc0ec153a39878fd524ece9f39732bd4998
   subpackages:
diff --git a/glide.yaml b/glide.yaml
index 80dcc98a6..f7711b939 100644
--- a/glide.yaml
+++ b/glide.yaml
@@ -5,6 +5,9 @@ import:
   - github
 - package: golang.org/x/oauth2
 - package: gopkg.in/yaml.v1
+- package: golang.org/x/sync
+  subpackages:
+  - errgroup
 testImport:
 - package: github.com/stretchr/testify
   version: ~1.1.4