more tools

tools/lsdir.go

@@ -0,0 +1,97 @@
+// Copyright 2013 <chaishushan{AT}gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ingore
+
+//
+// List files, support file/header regexp.
+//
+// Example:
+//	lsdir dir
+//	lsdir dir "\.go$"
+//	lsdir dir "\.go$" "chaishushan"
+//	lsdir dir "\.tiff?|jpg|jpeg$"
+//
+// Help:
+//	lsdir -h
+//
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+)
+
+const usage = `
+Usage: lsdir dir [nameFilter [dataFilter]]
+       lsdir -h
+
+Example:
+  lsdir dir
+  lsdir dir "\.go$"
+  lsdir dir "\.go$" "chaishushan"
+  lsdir dir "\.tiff?|jpg|jpeg$"
+    
+Report bugs to <chaishushan{AT}gmail.com>.
+`
+
+func main() {
+	if len(os.Args) < 2 || os.Args[1] == "-h" {
+		fmt.Fprintln(os.Stderr, usage[1:len(usage)-1])
+		os.Exit(0)
+	}
+	dir, nameFilter, dataFilter := os.Args[1], ".*", ""
+	if len(os.Args) > 2 {
+		nameFilter = os.Args[2]
+	}
+	if len(os.Args) > 3 {
+		dataFilter = os.Args[3]
+	}
+
+	total := 0
+	filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			log.Fatal("filepath.Walk: ", err)
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+		relpath, err := filepath.Rel(dir, path)
+		if err != nil {
+			log.Fatal("filepath.Rel: ", err)
+			return err
+		}
+		mathed, err := regexp.MatchString(nameFilter, relpath)
+		if err != nil {
+			log.Fatal("regexp.MatchString: ", err)
+		}
+		if mathed {
+			if dataFilter != "" {
+				data, err := ioutil.ReadFile(path)
+				if err != nil {
+					fmt.Printf("ioutil.ReadFile: %s\n", path)
+					log.Fatal("ioutil.ReadFile: ", err)
+				}
+				mathed, err := regexp.MatchString(dataFilter, string(data))
+				if err != nil {
+					log.Fatal("regexp.MatchString: ", err)
+				}
+				if mathed {
+					fmt.Printf("%s\n", relpath)
+					total++
+				}
+			} else {
+				fmt.Printf("%s\n", relpath)
+				total++
+			}
+		}
+		return nil
+	})
+	fmt.Printf("total %d\n", total)
+}