WIP

goldsmith.go

@@ -88,7 +88,7 @@ func (gs *goldsmith) makeStage() stage {
 	return s
 }
 
-func (gs *goldsmith) chainSingle(s stage, cs ChainerSingle) {
+func (gs *goldsmith) chainSingle(s stage, cs ChainerSingle, globs []string) {
 	defer close(s.output)
 
 	var wg sync.WaitGroup
@@ -96,7 +96,16 @@ func (gs *goldsmith) chainSingle(s stage, cs ChainerSingle) {
 		wg.Add(1)
 		go func(f File) {
 			defer wg.Done()
-			if f.Err == nil {
+
+			matched := true
+			if len(globs) > 0 {
+				var err error
+				if matched, err = globMatch(file.Path, globs); err != nil {
+					file.Err = err
+				}
+			}
+
+			if f.Err == nil && matched {
 				s.output <- cs.ChainSingle(f)
 			} else {
 				s.output <- f
@@ -107,14 +116,22 @@ func (gs *goldsmith) chainSingle(s stage, cs ChainerSingle) {
 	wg.Wait()
 }
 
-func (gs *goldsmith) chainMultiple(s stage, cm ChainerMultiple) {
+func (gs *goldsmith) chainMultiple(s stage, cm ChainerMultiple, globs []string) {
 	filtered := make(chan File)
 	defer close(filtered)
 
 	go cm.ChainMultiple(filtered, s.output)
 
 	for file := range s.input {
-		if file.Err == nil {
+		matched := true
+		if len(globs) > 0 {
+			var err error
+			if matched, err = globMatch(file.Path, globs); err != nil {
+				file.Err = err
+			}
+		}
+
+		if file.Err == nil && matched {
 			filtered <- file
 		} else {
 			s.output <- file
@@ -130,9 +147,9 @@ func (gs *goldsmith) Chain(ctx Context) Goldsmith {
 	if gs.err = ctx.Err; gs.err == nil {
 		switch c := ctx.Chainer.(type) {
 		case ChainerSingle:
-			go gs.chainSingle(gs.makeStage(), c)
+			go gs.chainSingle(gs.makeStage(), c, ctx.Globs)
 		case ChainerMultiple:
-			go gs.chainMultiple(gs.makeStage(), c)
+			go gs.chainMultiple(gs.makeStage(), c, ctx.Globs)
 		}
 	}
 

types.go

@@ -46,5 +46,6 @@ type File struct {
 
 type Context struct {
 	Chainer interface{}
+	Globs   []string
 	Err     error
 }

util.go

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package goldsmith
+
+import "path/filepath"
+
+func globMatch(pattern string, globs []string) (bool, error) {
+	var (
+		match bool
+		err   error
+	)
+
+	for _, glob := range globs {
+		match, err = filepath.Match(pattern, glob)
+		if err != nil || match {
+			break
+		}
+	}
+
+	return match, err
+}