gogio: add deeplink support

Add a new flag "-schemes" which links the URL schemes to the app.

Signed-off-by: inkeliz <inkeliz@inkeliz.com>

gogio/windowsbuild.go

@@ -202,10 +202,18 @@ func (b *windowsBuilder) buildProgram(buildInfo *buildInfo, name string, arch st
 		dest = filepath.Join(filepath.Dir(b.DestDir), name+"_"+arch+".exe")
 	}
 
+	ldflags := buildInfo.ldflags
+	if buildInfo.schemes != nil {
+		ldflags += ` -X "gioui.org/app.schemesURI=` + strings.Join(buildInfo.schemes, ",") + `" `
+	}
+	if buildInfo.appID != "" {
+		ldflags += ` -X "gioui.org/app.ID=` + buildInfo.appID + `" `
+	}
+
 	cmd := exec.Command(
 		"go",
 		"build",
-		"-ldflags=-H=windowsgui "+buildInfo.ldflags,
+		"-ldflags=-H=windowsgui "+ldflags,
 		"-tags="+buildInfo.tags,
 		"-o", dest,
 		buildInfo.pkgPath,