mage: add mage package

mage.go

@@ -4,13 +4,17 @@ package main
 
 import (
 	"context"
+	"fmt"
+	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
 	"path/filepath"
 	"runtime"
+	"strings"
 
 	"github.com/jtolds/qod"
+	"github.com/pkg/errors"
 )
 
 var wd string
@@ -24,6 +28,31 @@ func init() {
 
 const pkgBase = "git.xeserv.us/xena/route/"
 
+func output(cmd string, args ...string) (string, error) {
+	c := exec.Command(cmd, args...)
+	c.Env = os.Environ()
+	c.Stderr = os.Stderr
+	b, err := c.Output()
+	if err != nil {
+		return "", errors.Wrapf(err, `failed to run %v %q`, cmd, args)
+	}
+	return string(b), nil
+}
+
+func gitTag() (string, error) {
+	s, err := output("git", "describe", "--tags")
+	if err != nil {
+		ee, ok := errors.Cause(err).(*exec.ExitError)
+		if ok && ee.Exited() {
+			// probably no git tag
+			return "dev", nil
+		}
+		return "", err
+	}
+
+	return strings.TrimSuffix(s, "\n"), nil
+}
+
 func shouldWork(ctx context.Context, env []string, dir string, cmdName string, args ...string) {
 	loc, err := exec.LookPath(cmdName)
 	qod.ANE(err)
@@ -109,3 +138,37 @@ func Plugin() {
 
 	goBuildPlugin(ctx, filepath.Join(wd, "./bin/linux"), "plugins/autohttpagent", "autohttpagent.so")
 }
+
+// Package builds all binaries for all platforms and assembles a package of
+// documentation, useful tools and all route components.
+func Package() {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	//os.RemoveAll("./bin/darwin")
+	//os.RemoveAll("./bin/linux")
+	//os.RemoveAll("./bin/windows")
+
+	//mg.Deps(Linux, Windows, Darwin)
+
+	ver, err := gitTag()
+	qod.ANE(err)
+
+	for _, osname := range []string{"linux", "windows", "darwin"} {
+		dir, err := ioutil.TempDir("", "route-package-"+osname)
+		qod.ANE(err)
+		qod.Printlnf("%s", dir)
+
+		for _, file := range []string{"route", "route-httpagent", "routed"} {
+			if osname == "windows" {
+				file = file + ".exe"
+			}
+			shouldWork(ctx, nil, filepath.Join(wd, "bin", osname), "cp", "-vrf", file, dir)
+		}
+
+		shouldWork(ctx, nil, wd, "cp", "-vrf", "doc", dir)
+		shouldWork(ctx, nil, wd, "cp", "-vrf", "README.md", dir)
+
+		shouldWork(ctx, nil, dir, "tar", "czf", filepath.Join(wd, "bin", fmt.Sprintf("route-%s-%s.tar.gz", ver, osname)), ".")
+	}
+}