Fix bug: allow multiple gen_notice modules.

Test: m cts dist reportmissinglicenses

Change-Id: I07963c83eaddfe363a04871e813b56fe7f1465ad
diff --git a/android/gen_notice.go b/android/gen_notice.go
index f514975..fda91ac 100644
--- a/android/gen_notice.go
+++ b/android/gen_notice.go
@@ -67,7 +67,7 @@
 		if ctx.Failed() {
 			return
 		}
-		out(ctx, gm.output, proptools.StringDefault(gm.properties.ArtifactName, defaultName), "", modules...)
+		out(ctx, gm.output, ctx.ModuleName(gm), proptools.StringDefault(gm.properties.ArtifactName, defaultName), "", modules...)
 	})
 }
 
diff --git a/android/notices.go b/android/notices.go
index b16dc58..562a156 100644
--- a/android/notices.go
+++ b/android/notices.go
@@ -47,14 +47,14 @@
 }
 
 // buildNoticeOutputFromLicenseMetadata writes out a notice file.
-func buildNoticeOutputFromLicenseMetadata(ctx BuilderContext, tool, name string, outputFile WritablePath, libraryName, stripPrefix string, modules ...Module) {
+func buildNoticeOutputFromLicenseMetadata(ctx BuilderContext, tool, ruleName string, outputFile WritablePath, libraryName, stripPrefix string, modules ...Module) {
 	depsFile := outputFile.ReplaceExtension(ctx, strings.TrimPrefix(outputFile.Ext()+".d", "."))
 	rule := NewRuleBuilder(pctx, ctx)
 	if len(modules) == 0 {
 		if mctx, ok := ctx.(ModuleContext); ok {
 			modules = []Module{mctx.Module()}
 		} else {
-			panic(fmt.Errorf("%s %q needs a module to generate the notice for", name, libraryName))
+			panic(fmt.Errorf("%s %q needs a module to generate the notice for", ruleName, libraryName))
 		}
 	}
 	if libraryName == "" {
@@ -75,26 +75,26 @@
 		cmd = cmd.FlagWithArg("--product ", libraryName)
 	}
 	cmd = cmd.Inputs(modulesLicenseMetadata(ctx, modules...))
-	rule.Build(name, "container notice file")
+	rule.Build(ruleName, "container notice file")
 }
 
 // BuildNoticeTextOutputFromLicenseMetadata writes out a notice text file based
 // on the license metadata files for the input `modules` defaulting to the
 // current context module if none given.
-func BuildNoticeTextOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, libraryName, stripPrefix string, modules ...Module) {
-	buildNoticeOutputFromLicenseMetadata(ctx, "textnotice", "text_notice", outputFile, libraryName, stripPrefix, modules...)
+func BuildNoticeTextOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, ruleName, libraryName, stripPrefix string, modules ...Module) {
+	buildNoticeOutputFromLicenseMetadata(ctx, "textnotice", "text_notice_"+ruleName, outputFile, libraryName, stripPrefix, modules...)
 }
 
 // BuildNoticeHtmlOutputFromLicenseMetadata writes out a notice text file based
 // on the license metadata files for the input `modules` defaulting to the
 // current context module if none given.
-func BuildNoticeHtmlOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, libraryName, stripPrefix string, modules ...Module) {
-	buildNoticeOutputFromLicenseMetadata(ctx, "htmlnotice", "html_notice", outputFile, libraryName, stripPrefix, modules...)
+func BuildNoticeHtmlOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, ruleName, libraryName, stripPrefix string, modules ...Module) {
+	buildNoticeOutputFromLicenseMetadata(ctx, "htmlnotice", "html_notice_"+ruleName, outputFile, libraryName, stripPrefix, modules...)
 }
 
 // BuildNoticeXmlOutputFromLicenseMetadata writes out a notice text file based
 // on the license metadata files for the input `modules` defaulting to the
 // current context module if none given.
-func BuildNoticeXmlOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, libraryName, stripPrefix string, modules ...Module) {
-	buildNoticeOutputFromLicenseMetadata(ctx, "xmlnotice", "xml_notice", outputFile, libraryName, stripPrefix, modules...)
+func BuildNoticeXmlOutputFromLicenseMetadata(ctx BuilderContext, outputFile WritablePath, ruleName, libraryName, stripPrefix string, modules ...Module) {
+	buildNoticeOutputFromLicenseMetadata(ctx, "xmlnotice", "xml_notice_"+ruleName, outputFile, libraryName, stripPrefix, modules...)
 }
diff --git a/android/singleton.go b/android/singleton.go
index ec7f63e..7c6cf4f 100644
--- a/android/singleton.go
+++ b/android/singleton.go
@@ -272,7 +272,8 @@
 			if depQualified.pkg != qualified.pkg {
 				rule := effectiveVisibilityRules(s.Config(), depQualified)
 				if !rule.matches(qualified) {
-					s.ModuleErrorf(referer, "references %s which is not visible to this module\nYou may need to add %q to its visibility", depQualified, "//"+s.ModuleDir(m))
+					s.ModuleErrorf(referer, "module %q references %q which is not visible to this module\nYou may need to add %q to its visibility",
+						referer.Name(), depQualified, "//"+s.ModuleDir(referer))
 					continue
 				}
 			}