Allow common.Glob to be called by singletons

Make common.Glob take an interface that is the intersection of
blueprint.ModuleContext and blueprint.SingletonContext used by
Glob and GlobRule, allowing it to be called on either.  Also
move ExpandSources and Glob into AndroidModuleContext.

Change-Id: I8d1a3160c5dd201033afdb37210e82d8065b137d

cc/cc.go

@@ -531,7 +531,7 @@ func (c *CCBase) customCompileObjs(ctx common.AndroidModuleContext, flags CCFlag
 
 	buildFlags := ccFlagsToBuilderFlags(flags)
 
-	srcFiles = common.ExpandSources(ctx, srcFiles)
+	srcFiles = ctx.ExpandSources(srcFiles)
 	srcFiles, deps := genSources(ctx, srcFiles, buildFlags)
 
 	return TransformSourceToObj(ctx, subdir, srcFiles, buildFlags, deps)

common/glob.go

@@ -66,41 +66,20 @@ func hasGlob(in []string) bool {
 	return false
 }
 
-func expandGlobs(ctx AndroidModuleContext, in []string) []string {
-	if !hasGlob(in) {
-		return in
-	}
-
-	var excludes []string
-	for _, s := range in {
-		if s[0] == '-' {
-			excludes = append(excludes, s[1:])
-		}
-	}
-
-	out := make([]string, 0, len(in))
-	for _, s := range in {
-		if s[0] == '-' {
-			continue
-		} else if glob.IsGlob(s) {
-			out = append(out, Glob(ctx, s, excludes)...)
-		} else {
-			out = append(out, s)
-		}
-	}
-
-	return out
+// The subset of ModuleContext and SingletonContext needed by Glob
+type globContext interface {
+	Build(pctx *blueprint.PackageContext, params blueprint.BuildParams)
+	AddNinjaFileDeps(deps ...string)
 }
 
-func Glob(ctx AndroidModuleContext, globPattern string, excludes []string) []string {
-	fileListFile := filepath.Join(ModuleOutDir(ctx), "glob", globToString(globPattern))
+func Glob(ctx globContext, outDir string, globPattern string, excludes []string) ([]string, error) {
+	fileListFile := filepath.Join(outDir, "glob", globToString(globPattern))
 	depFile := fileListFile + ".d"
 
 	// Get a globbed file list, and write out fileListFile and depFile
 	files, err := glob.GlobWithDepFile(globPattern, fileListFile, depFile, excludes)
 	if err != nil {
-		ctx.ModuleErrorf("glob: %s", err.Error())
-		return []string{globPattern}
+		return nil, err
 	}
 
 	GlobRule(ctx, globPattern, excludes, fileListFile, depFile)
@@ -108,10 +87,10 @@ func Glob(ctx AndroidModuleContext, globPattern string, excludes []string) []str
 	// Make build.ninja depend on the fileListFile
 	ctx.AddNinjaFileDeps(fileListFile)
 
-	return files
+	return files, nil
 }
 
-func GlobRule(ctx AndroidModuleContext, globPattern string, excludes []string,
+func GlobRule(ctx globContext, globPattern string, excludes []string,
 	fileListFile, depFile string) {
 
 	// Create a rule to rebuild fileListFile if a directory in depFile changes.  fileListFile

common/module.go

@@ -18,6 +18,8 @@ import (
 	"path/filepath"
 	"runtime"
 
+	"android/soong/glob"
+
 	"github.com/google/blueprint"
 )
 
@@ -49,6 +51,9 @@ type AndroidModuleContext interface {
 	blueprint.ModuleContext
 	androidBaseContext
 
+	ExpandSources(srcFiles []string) []string
+	Glob(globPattern string, excludes []string) []string
+
 	InstallFile(installPath, srcPath string, deps ...string) string
 	InstallFileName(installPath, name, srcPath string, deps ...string) string
 	CheckbuildFile(srcPath string)
@@ -465,7 +470,7 @@ func isAndroidModule(m blueprint.Module) bool {
 	return ok
 }
 
-func ExpandSources(ctx AndroidModuleContext, srcFiles []string) []string {
+func (ctx *androidModuleContext) ExpandSources(srcFiles []string) []string {
 	prefix := ModuleSrcDir(ctx)
 	for i, srcFile := range srcFiles {
 		if srcFile[0] == '-' {
@@ -475,8 +480,37 @@ func ExpandSources(ctx AndroidModuleContext, srcFiles []string) []string {
 		}
 	}
 
-	srcFiles = expandGlobs(ctx, srcFiles)
-	return srcFiles
+	if !hasGlob(srcFiles) {
+		return srcFiles
+	}
+
+	var excludes []string
+	for _, s := range srcFiles {
+		if s[0] == '-' {
+			excludes = append(excludes, s[1:])
+		}
+	}
+
+	globbedSrcFiles := make([]string, 0, len(srcFiles))
+	for _, s := range srcFiles {
+		if s[0] == '-' {
+			continue
+		} else if glob.IsGlob(s) {
+			globbedSrcFiles = append(globbedSrcFiles, ctx.Glob(s, excludes)...)
+		} else {
+			globbedSrcFiles = append(globbedSrcFiles, s)
+		}
+	}
+
+	return globbedSrcFiles
+}
+
+func (ctx *androidModuleContext) Glob(globPattern string, excludes []string) []string {
+	ret, err := Glob(ctx, ModuleOutDir(ctx), globPattern, excludes)
+	if err != nil {
+		ctx.ModuleErrorf("glob: %s", err.Error())
+	}
+	return ret
 }
 
 func BuildTargetSingleton() blueprint.Singleton {

genrule/genrule.go

@@ -132,7 +132,7 @@ func GenSrcsFactory() (blueprint.Module, []interface{}) {
 	properties := &genSrcsProperties{}
 
 	tasks := func(ctx common.AndroidModuleContext) []generateTask {
-		srcFiles := common.ExpandSources(ctx, properties.Srcs)
+		srcFiles := ctx.ExpandSources(properties.Srcs)
 		tasks := make([]generateTask, 0, len(srcFiles))
 		for _, in := range srcFiles {
 			out := pathtools.ReplaceExtension(in, properties.Output_extension)
@@ -159,7 +159,7 @@ func GenRuleFactory() (blueprint.Module, []interface{}) {
 	tasks := func(ctx common.AndroidModuleContext) []generateTask {
 		return []generateTask{
 			{
-				in:  common.ExpandSources(ctx, properties.Srcs),
+				in:  ctx.ExpandSources(properties.Srcs),
 				out: filepath.Join(common.ModuleGenDir(ctx), properties.Out),
 			},
 		}

java/app.go

@@ -244,14 +244,14 @@ func (a *AndroidApp) aaptFlags(ctx common.AndroidModuleContext) ([]string, []str
 	var aaptDeps []string
 	var hasResources bool
 	for _, d := range resourceDirs {
-		newDeps := common.Glob(ctx, filepath.Join(d, "**/*"), aaptIgnoreFilenames)
+		newDeps := ctx.Glob(filepath.Join(d, "**/*"), aaptIgnoreFilenames)
 		aaptDeps = append(aaptDeps, newDeps...)
 		if len(newDeps) > 0 {
 			hasResources = true
 		}
 	}
 	for _, d := range assetDirs {
-		newDeps := common.Glob(ctx, filepath.Join(d, "**/*"), aaptIgnoreFilenames)
+		newDeps := ctx.Glob(filepath.Join(d, "**/*"), aaptIgnoreFilenames)
 		aaptDeps = append(aaptDeps, newDeps...)
 	}
 

java/java.go

@@ -292,7 +292,7 @@ func (j *javaBase) GenerateJavaBuildActions(ctx common.AndroidModuleContext) {
 		javacDeps = append(javacDeps, classpath...)
 	}
 
-	srcFiles := common.ExpandSources(ctx, j.properties.Srcs)
+	srcFiles := ctx.ExpandSources(j.properties.Srcs)
 
 	srcFiles = j.genSources(ctx, srcFiles, flags)
 

java/resources.go

@@ -47,7 +47,7 @@ func ResourceDirsToJarSpecs(ctx common.AndroidModuleContext, resourceDirs []stri
 			continue
 		}
 		resourceDir := filepath.Join(common.ModuleSrcDir(ctx), resourceDir)
-		dirs := common.Glob(ctx, resourceDir, nil)
+		dirs := ctx.Glob(resourceDir, nil)
 		for _, dir := range dirs {
 			fileListFile := filepath.Join(common.ModuleOutDir(ctx), "res", dir, "resources.list")
 			depFile := fileListFile + ".d"