misc/makerelease: set version number in Windows installer

Set correct version number at Windows installer based on
Go's Mercurial tag.

Name                                     | Version
------------------------------------------------
Go Programming Language amd64 go1.3.3    | 1.3.3
Go Programming Language amd64 go1.2rc3   | 1.2
Go Programming Language amd64 go1.2beta1 | 1.2

Fixes #8239.

LGTM=adg
R=adg, c.emil.hessman, alex.brainman
CC=golang-codereviews
https://golang.org/cl/160950044

misc/makerelease/makerelease.go

@@ -437,7 +437,8 @@ func (b *Build) Do() error {
 		// Build package.
 		_, err = b.run(work, "candle",
 			"-nologo",
-			"-dVersion="+version,
+			"-dGoVersion="+version,
+			"-dWixGoVersion="+wixVersion(version),
 			"-dArch="+b.Arch,
 			"-dSourceDir=go",
 			installer, appfiles)
@@ -471,6 +472,22 @@ func (b *Build) Do() error {
 	return err
 }
 
+var versionRe = regexp.MustCompile(`^go([0-9]+(\.[0-9]+)*)`)
+
+// The Microsoft installer requires version format major.minor.build
+// (http://msdn.microsoft.com/en-us/library/aa370859%28v=vs.85%29.aspx).
+// Where the major and minor field has a maximum value of 255 and build 65535.
+// The offical Go version format is goMAJOR.MINOR.PATCH at $GOROOT/VERSION.
+// It's based on the Mercurial tag. Remove prefix and suffix to make the
+// installer happy.
+func wixVersion(v string) string {
+	m := versionRe.FindStringSubmatch(v)
+	if m == nil {
+		return "0.0.0"
+	}
+	return m[1]
+}
+
 // extras fetches the go.tools, go.blog, and go-tour repositories,
 // builds them and copies the resulting binaries and static assets
 // to the new GOROOT.

misc/makerelease/windows/installer.wxs

@@ -18,13 +18,12 @@
 
 <Product
     Id="FF5B30B2-08C2-11E1-85A2-6ACA4824019B"
-    Name="Go Programming Language $(var.Arch) $(var.Version)"
+    Name="Go Programming Language $(var.Arch) $(var.GoVersion)"
     Language="1033"
     Codepage="1252"
-    Version="0.0.0.0"
+    Version="$(var.WixGoVersion)"
     Manufacturer="http://golang.org"
     UpgradeCode="$(var.UpgradeCode)" >
-    <!-- Version="$(var.Version)" TODO: Version requires X.X.X.X format -->
 
 <Package
     Id='*'