bike/shed: new package.

It comes up often enough that it's time to provide
the utility of a standard package.

R=r, mirtchovski, adg, rsc, n13m3y3r, ality, go.peter.90, lstoakes, iant, jan.mercl, bsiegert, robert.hencke, rogpeppe, befelemepeseveze, kevlar
CC=golang-dev
https://golang.org/cl/4557047

src/pkg/Makefile

@@ -18,6 +18,7 @@ DIRS=\
 	archive/zip\
 	asn1\
 	big\
+	bike/shed\
 	bufio\
 	bytes\
 	cmath\

src/pkg/bike/shed/Makefile

@@ -0,0 +1,11 @@
+# Copyright 2011 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+include ../../../Make.inc
+
+TARG=bike/shed
+GOFILES=\
+	colors.go\
+
+include ../../../Make.pkg

src/pkg/bike/shed/colors.go

@@ -0,0 +1,26 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+/*
+Package shed defines colors for bike sheds.
+
+See http://red.bikeshed.org/ for more details.
+
+TODO: More colors, colour support, stripes, methods, ponies.
+*/
+package shed
+
+// A Color represents a color, or a colour if you're colonial enough.
+type Color uint8
+
+const (
+	Red Color = iota
+	Green
+	Yellow
+	Blue
+	Purple
+	Magenta
+	Chartreuse
+	Cyan
+)

src/pkg/bike/shed/colors_test.go

@@ -0,0 +1,15 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package shed
+
+import (
+	"testing"
+)
+
+func TestCompilerIsNotColorBlind(t *testing.T) {
+	if Red == Green {
+		t.Error("Expected Red != Green, but couldn't distinguish them")
+	}
+}