Absorb go-xgettext/main.go: Hackly do away with ad-hoc go-flags package

2 files changed, 426 insertions, 357 deletions

diff --git a/go-xgettext/main.go b/go-xgettext/main.go
deleted file mode 100644
index 881cb9f..0000000
--- a/go-xgettext/main.go
+++ /dev/null
@@ -1,357 +0,0 @@
-// -*- Mode: Go; indent-tabs-mode: t -*-
-
-/*
- * Copyright (C) 2015-2016 Canonical Ltd
- *
- * 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 main
-
-import (
-	"fmt"
-	"go/ast"
-	"go/parser"
-	"go/token"
-	"io"
-	"io/ioutil"
-	"log"
-	"os"
-	"sort"
-	"strings"
-	"time"
-
-	"github.com/jessevdk/go-flags"
-)
-
-type msgID struct {
-	msgidPlural string
-	comment     string
-	fname       string
-	line        int
-	formatHint  string
-}
-
-var msgIDs map[string][]msgID
-
-func formatComment(com string) string {
-	out := ""
-	for _, rawline := range strings.Split(com, "\n") {
-		line := rawline
-		line = strings.TrimPrefix(line, "//")
-		line = strings.TrimPrefix(line, "/*")
-		line = strings.TrimSuffix(line, "*/")
-		line = strings.TrimSpace(line)
-		if line != "" {
-			out += fmt.Sprintf("#. %s\n", line)
-		}
-	}
-
-	return out
-}
-
-func findCommentsForTranslation(fset *token.FileSet, f *ast.File, posCall token.Position) string {
-	com := ""
-	for _, cg := range f.Comments {
-		// search for all comments in the previous line
-		for i := len(cg.List) - 1; i >= 0; i-- {
-			c := cg.List[i]
-
-			posComment := fset.Position(c.End())
-			//println(posCall.Line, posComment.Line, c.Text)
-			if posCall.Line == posComment.Line+1 {
-				posCall = posComment
-				com = fmt.Sprintf("%s\n%s", c.Text, com)
-			}
-		}
-	}
-
-	// only return if we have a matching prefix
-	formatedComment := formatComment(com)
-	needle := fmt.Sprintf("#. %s", opts.AddCommentsTag)
-	if !strings.HasPrefix(formatedComment, needle) {
-		formatedComment = ""
-	}
-
-	return formatedComment
-}
-
-func constructValue(val interface{}) string {
-	switch val.(type) {
-	case *ast.BasicLit:
-		return val.(*ast.BasicLit).Value
-	// this happens for constructs like:
-	//  gettext.Gettext("foo" + "bar")
-	case *ast.BinaryExpr:
-		// we only support string concat
-		if val.(*ast.BinaryExpr).Op != token.ADD {
-			return ""
-		}
-		left := constructValue(val.(*ast.BinaryExpr).X)
-		// strip right " (or `)
-		left = left[0 : len(left)-1]
-		right := constructValue(val.(*ast.BinaryExpr).Y)
-		// strip left " (or `)
-		right = right[1:len(right)]
-		return left + right
-	default:
-		panic(fmt.Sprintf("unknown type: %v", val))
-	}
-}
-
-func inspectNodeForTranslations(fset *token.FileSet, f *ast.File, n ast.Node) bool {
-	// FIXME: this assume we always have a "gettext.Gettext" style keyword
-	var gettextSelector, gettextFuncName string
-	l := strings.Split(opts.Keyword, ".")
-
-	if len(l) > 1 {
-		gettextSelector = l[0]
-		gettextFuncName = l[1]
-	} else {
-		gettextFuncName = l[0]
-	}
-
-	var gettextSelectorPlural, gettextFuncNamePlural string
-	l = strings.Split(opts.KeywordPlural, ".")
-
-	if len(l) > 1 {
-		gettextSelectorPlural = l[0]
-		gettextFuncNamePlural = l[1]
-	} else {
-		gettextFuncNamePlural = l[0]
-	}
-
-	switch x := n.(type) {
-	case *ast.CallExpr:
-		var i18nStr, i18nStrPlural string
-		//if sel, ok := x.Fun.(*ast.Ident); ok {
-
-		//}
-		switch sel := x.Fun.(type) {
-		case *ast.Ident:
-			if sel.Name == gettextFuncNamePlural {
-				i18nStr = x.Args[0].(*ast.BasicLit).Value
-				i18nStrPlural = x.Args[1].(*ast.BasicLit).Value
-			}
-			if sel.Name == gettextFuncName {
-				i18nStr = constructValue(x.Args[0])
-			}
-		case *ast.SelectorExpr:
-			if sel.Sel.Name == gettextFuncNamePlural && sel.X.(*ast.Ident).Name == gettextSelectorPlural {
-				i18nStr = x.Args[0].(*ast.BasicLit).Value
-				i18nStrPlural = x.Args[1].(*ast.BasicLit).Value
-			}
-
-			if sel.Sel.Name == gettextFuncName && sel.X.(*ast.Ident).Name == gettextSelector {
-				i18nStr = constructValue(x.Args[0])
-			}
-		}
-
-		if i18nStr == "" {
-			break
-		}
-
-		// FIXME: too simplistic(?), no %% is considered
-		formatHint := ""
-		if strings.Contains(i18nStr, "%") || strings.Contains(i18nStrPlural, "%") {
-			// well, not quite correct but close enough
-			formatHint = "c-format"
-		}
-
-		msgidStr := formatI18nStr(i18nStr)
-		posCall := fset.Position(n.Pos())
-		msgIDs[msgidStr] = append(msgIDs[msgidStr], msgID{
-			formatHint:  formatHint,
-			msgidPlural: formatI18nStr(i18nStrPlural),
-			fname:       posCall.Filename,
-			line:        posCall.Line,
-			comment:     findCommentsForTranslation(fset, f, posCall),
-		})
-	}
-
-	return true
-}
-
-func formatI18nStr(s string) string {
-	if s == "" {
-		return ""
-	}
-	// the "`" is special
-	if s[0] == '`' {
-		// replace inner " with \"
-		s = strings.Replace(s, "\"", "\\\"", -1)
-		// replace \n with \\n
-		s = strings.Replace(s, "\n", "\\n", -1)
-	}
-	// strip leading and trailing " (or `)
-	s = s[1 : len(s)-1]
-	return s
-}
-
-func processFiles(args []string) error {
-	// go over the input files
-	msgIDs = make(map[string][]msgID)
-
-	fset := token.NewFileSet()
-	for _, fname := range args {
-		if err := processSingleGoSource(fset, fname); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func processSingleGoSource(fset *token.FileSet, fname string) error {
-	fnameContent, err := ioutil.ReadFile(fname)
-	if err != nil {
-		panic(err)
-	}
-
-	// Create the AST by parsing src.
-	f, err := parser.ParseFile(fset, fname, fnameContent, parser.ParseComments)
-	if err != nil {
-		panic(err)
-	}
-
-	ast.Inspect(f, func(n ast.Node) bool {
-		return inspectNodeForTranslations(fset, f, n)
-	})
-
-	return nil
-}
-
-var formatTime = func() string {
-	return time.Now().Format("2006-01-02 15:04-0700")
-}
-
-func writePotFile(out io.Writer) {
-
-	header := fmt.Sprintf(`# SOME DESCRIPTIVE TITLE.
-# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
-# This file is distributed under the same license as the PACKAGE package.
-# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
-#
-#, fuzzy
-msgid   ""
-msgstr  "Project-Id-Version: %s\n"
-        "Report-Msgid-Bugs-To: %s\n"
-        "POT-Creation-Date: %s\n"
-        "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
-        "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
-        "Language-Team: LANGUAGE <LL@li.org>\n"
-        "Language: \n"
-        "MIME-Version: 1.0\n"
-        "Content-Type: text/plain; charset=CHARSET\n"
-        "Content-Transfer-Encoding: 8bit\n"
-
-`, opts.PackageName, opts.MsgIDBugsAddress, formatTime())
-	fmt.Fprintf(out, "%s", header)
-
-	// yes, this is the way to do it in go
-	sortedKeys := []string{}
-	for k := range msgIDs {
-		sortedKeys = append(sortedKeys, k)
-	}
-	if opts.SortOutput {
-		sort.Strings(sortedKeys)
-	}
-
-	// FIXME: use template here?
-	for _, k := range sortedKeys {
-		msgidList := msgIDs[k]
-		for _, msgid := range msgidList {
-			if opts.AddComments || opts.AddCommentsTag != "" {
-				fmt.Fprintf(out, "%s", msgid.comment)
-			}
-		}
-		if !opts.NoLocation {
-			fmt.Fprintf(out, "#:")
-			for _, msgid := range msgidList {
-				fmt.Fprintf(out, " %s:%d", msgid.fname, msgid.line)
-			}
-			fmt.Fprintf(out, "\n")
-		}
-		msgid := msgidList[0]
-		if msgid.formatHint != "" {
-			fmt.Fprintf(out, "#, %s\n", msgid.formatHint)
-		}
-		var formatOutput = func(in string) string {
-			// split string with \n into multiple lines
-			// to make the output nicer
-			out := strings.Replace(in, "\\n", "\\n\"\n        \"", -1)
-			// cleanup too aggressive splitting (empty "" lines)
-			return strings.TrimSuffix(out, "\"\n        \"")
-		}
-		fmt.Fprintf(out, "msgid   \"%v\"\n", formatOutput(k))
-		if msgid.msgidPlural != "" {
-			fmt.Fprintf(out, "msgid_plural   \"%v\"\n", formatOutput(msgid.msgidPlural))
-			fmt.Fprintf(out, "msgstr[0]  \"\"\n")
-			fmt.Fprintf(out, "msgstr[1]  \"\"\n")
-		} else {
-			fmt.Fprintf(out, "msgstr  \"\"\n")
-		}
-		fmt.Fprintf(out, "\n")
-	}
-
-}
-
-// FIXME: this must be setable via go-flags
-var opts struct {
-	Output string `short:"o" long:"output" description:"output to specified file"`
-
-	AddComments bool `short:"c" long:"add-comments" description:"place all comment blocks preceding keyword lines in output file"`
-
-	AddCommentsTag string `long:"add-comments-tag" description:"place comment blocks starting with TAG and prceding keyword lines in output file"`
-
-	SortOutput bool `short:"s" long:"sort-output" description:"generate sorted output"`
-
-	NoLocation bool `long:"no-location" description:"do not write '#: filename:line' lines"`
-
-	MsgIDBugsAddress string `long:"msgid-bugs-address" default:"EMAIL" description:"set report address for msgid bugs"`
-
-	PackageName string `long:"package-name" description:"set package name in output"`
-
-	Keyword       string `short:"k" long:"keyword" default:"gettext.Gettext" description:"look for WORD as the keyword for singular strings"`
-	KeywordPlural string `long:"keyword-plural" default:"gettext.NGettext" description:"look for WORD as the keyword for plural strings"`
-}
-
-func main() {
-	// parse args
-	args, err := flags.ParseArgs(&opts, os.Args)
-	if err != nil {
-		log.Fatalf("ParseArgs failed %s", err)
-	}
-
-	if err := processFiles(args[1:]); err != nil {
-		log.Fatalf("processFiles failed with: %s", err)
-	}
-
-	out := os.Stdout
-	if opts.Output != "" {
-		var err error
-		out, err = os.Create(opts.Output)
-		if err != nil {
-			log.Fatalf("failed to create %s: %s", opts.Output, err)
-		}
-	}
-	writePotFile(out)
-}
diff --git a/src/gotext.go b/src/gotext.go
index 6c3d9fe..ae65d58 100644
--- a/src/gotext.go
+++ b/src/gotext.go
@@ -1,6 +1,21 @@
 package gotext
 
 import (
+	"fmt"
+	"flag"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"sort"
+	"strings"
+	"time"
+
+	g "gobang"
+	// "github.com/jessevdk/go-flags"
 )
 
 
@@ -15,5 +30,416 @@ const (
 	_ = C.int(1)
 )
 
+type msgID struct {
+	msgidPlural string
+	comment     string
+	fname       string
+	line        int
+	formatHint  string
+}
+
+var msgIDs map[string][]msgID
+
+func formatComment(com string) string {
+	out := ""
+	for _, rawline := range strings.Split(com, "\n") {
+		line := rawline
+		line = strings.TrimPrefix(line, "//")
+		line = strings.TrimPrefix(line, "/*")
+		line = strings.TrimSuffix(line, "*/")
+		line = strings.TrimSpace(line)
+		if line != "" {
+			out += fmt.Sprintf("#. %s\n", line)
+		}
+	}
+
+	return out
+}
+
+func findCommentsForTranslation(fset *token.FileSet, f *ast.File, posCall token.Position) string {
+	com := ""
+	for _, cg := range f.Comments {
+		// search for all comments in the previous line
+		for i := len(cg.List) - 1; i >= 0; i-- {
+			c := cg.List[i]
+
+			posComment := fset.Position(c.End())
+			//println(posCall.Line, posComment.Line, c.Text)
+			if posCall.Line == posComment.Line+1 {
+				posCall = posComment
+				com = fmt.Sprintf("%s\n%s", c.Text, com)
+			}
+		}
+	}
+
+	// only return if we have a matching prefix
+	formatedComment := formatComment(com)
+	needle := fmt.Sprintf("#. %s", opts.AddCommentsTag)
+	if !strings.HasPrefix(formatedComment, needle) {
+		formatedComment = ""
+	}
+
+	return formatedComment
+}
+
+func constructValue(val interface{}) string {
+	switch val.(type) {
+	case *ast.BasicLit:
+		return val.(*ast.BasicLit).Value
+	// this happens for constructs like:
+	//  gettext.Gettext("foo" + "bar")
+	case *ast.BinaryExpr:
+		// we only support string concat
+		if val.(*ast.BinaryExpr).Op != token.ADD {
+			return ""
+		}
+		left := constructValue(val.(*ast.BinaryExpr).X)
+		// strip right " (or `)
+		left = left[0 : len(left)-1]
+		right := constructValue(val.(*ast.BinaryExpr).Y)
+		// strip left " (or `)
+		right = right[1:len(right)]
+		return left + right
+	default:
+		panic(fmt.Sprintf("unknown type: %v", val))
+	}
+}
+
+func inspectNodeForTranslations(fset *token.FileSet, f *ast.File, n ast.Node) bool {
+	// FIXME: this assume we always have a "gettext.Gettext" style keyword
+	var gettextSelector, gettextFuncName string
+	l := strings.Split(opts.Keyword, ".")
+
+	if len(l) > 1 {
+		gettextSelector = l[0]
+		gettextFuncName = l[1]
+	} else {
+		gettextFuncName = l[0]
+	}
+
+	var gettextSelectorPlural, gettextFuncNamePlural string
+	l = strings.Split(opts.KeywordPlural, ".")
+
+	if len(l) > 1 {
+		gettextSelectorPlural = l[0]
+		gettextFuncNamePlural = l[1]
+	} else {
+		gettextFuncNamePlural = l[0]
+	}
+
+	switch x := n.(type) {
+	case *ast.CallExpr:
+		var i18nStr, i18nStrPlural string
+		//if sel, ok := x.Fun.(*ast.Ident); ok {
+
+		//}
+		switch sel := x.Fun.(type) {
+		case *ast.Ident:
+			if sel.Name == gettextFuncNamePlural {
+				i18nStr = x.Args[0].(*ast.BasicLit).Value
+				i18nStrPlural = x.Args[1].(*ast.BasicLit).Value
+			}
+			if sel.Name == gettextFuncName {
+				i18nStr = constructValue(x.Args[0])
+			}
+		case *ast.SelectorExpr:
+			if sel.Sel.Name == gettextFuncNamePlural && sel.X.(*ast.Ident).Name == gettextSelectorPlural {
+				i18nStr = x.Args[0].(*ast.BasicLit).Value
+				i18nStrPlural = x.Args[1].(*ast.BasicLit).Value
+			}
+
+			if sel.Sel.Name == gettextFuncName && sel.X.(*ast.Ident).Name == gettextSelector {
+				i18nStr = constructValue(x.Args[0])
+			}
+		}
+
+		if i18nStr == "" {
+			break
+		}
+
+		// FIXME: too simplistic(?), no %% is considered
+		formatHint := ""
+		if strings.Contains(i18nStr, "%") || strings.Contains(i18nStrPlural, "%") {
+			// well, not quite correct but close enough
+			formatHint = "c-format"
+		}
+
+		msgidStr := formatI18nStr(i18nStr)
+		posCall := fset.Position(n.Pos())
+		msgIDs[msgidStr] = append(msgIDs[msgidStr], msgID{
+			formatHint:  formatHint,
+			msgidPlural: formatI18nStr(i18nStrPlural),
+			fname:       posCall.Filename,
+			line:        posCall.Line,
+			comment:     findCommentsForTranslation(fset, f, posCall),
+		})
+	}
+
+	return true
+}
+
+func formatI18nStr(s string) string {
+	if s == "" {
+		return ""
+	}
+	// the "`" is special
+	if s[0] == '`' {
+		// replace inner " with \"
+		s = strings.Replace(s, "\"", "\\\"", -1)
+		// replace \n with \\n
+		s = strings.Replace(s, "\n", "\\n", -1)
+	}
+	// strip leading and trailing " (or `)
+	s = s[1 : len(s)-1]
+	return s
+}
+
+func processFiles(args []string) error {
+	// go over the input files
+	msgIDs = make(map[string][]msgID)
+
+	fset := token.NewFileSet()
+	for _, fname := range args {
+		if err := processSingleGoSource(fset, fname); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func processSingleGoSource(fset *token.FileSet, fname string) error {
+	fnameContent, err := ioutil.ReadFile(fname)
+	if err != nil {
+		panic(err)
+	}
+
+	// Create the AST by parsing src.
+	f, err := parser.ParseFile(fset, fname, fnameContent, parser.ParseComments)
+	if err != nil {
+		panic(err)
+	}
+
+	ast.Inspect(f, func(n ast.Node) bool {
+		return inspectNodeForTranslations(fset, f, n)
+	})
+
+	return nil
+}
+
+var formatTime = func() string {
+	return time.Now().Format("2006-01-02 15:04-0700")
+}
+
+func writePotFile(out io.Writer) {
+
+	header := fmt.Sprintf(`# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid   ""
+msgstr  "Project-Id-Version: %s\n"
+        "Report-Msgid-Bugs-To: %s\n"
+        "POT-Creation-Date: %s\n"
+        "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+        "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+        "Language-Team: LANGUAGE <LL@li.org>\n"
+        "Language: \n"
+        "MIME-Version: 1.0\n"
+        "Content-Type: text/plain; charset=CHARSET\n"
+        "Content-Transfer-Encoding: 8bit\n"
+
+`, opts.PackageName, opts.MsgIDBugsAddress, formatTime())
+	fmt.Fprintf(out, "%s", header)
+
+	// yes, this is the way to do it in go
+	sortedKeys := []string{}
+	for k := range msgIDs {
+		sortedKeys = append(sortedKeys, k)
+	}
+	if opts.SortOutput {
+		sort.Strings(sortedKeys)
+	}
+
+	// FIXME: use template here?
+	for _, k := range sortedKeys {
+		msgidList := msgIDs[k]
+		for _, msgid := range msgidList {
+			if opts.AddComments || opts.AddCommentsTag != "" {
+				fmt.Fprintf(out, "%s", msgid.comment)
+			}
+		}
+		if !opts.NoLocation {
+			fmt.Fprintf(out, "#:")
+			for _, msgid := range msgidList {
+				fmt.Fprintf(out, " %s:%d", msgid.fname, msgid.line)
+			}
+			fmt.Fprintf(out, "\n")
+		}
+		msgid := msgidList[0]
+		if msgid.formatHint != "" {
+			fmt.Fprintf(out, "#, %s\n", msgid.formatHint)
+		}
+		var formatOutput = func(in string) string {
+			// split string with \n into multiple lines
+			// to make the output nicer
+			out := strings.Replace(in, "\\n", "\\n\"\n        \"", -1)
+			// cleanup too aggressive splitting (empty "" lines)
+			return strings.TrimSuffix(out, "\"\n        \"")
+		}
+		fmt.Fprintf(out, "msgid   \"%v\"\n", formatOutput(k))
+		if msgid.msgidPlural != "" {
+			fmt.Fprintf(out, "msgid_plural   \"%v\"\n", formatOutput(msgid.msgidPlural))
+			fmt.Fprintf(out, "msgstr[0]  \"\"\n")
+			fmt.Fprintf(out, "msgstr[1]  \"\"\n")
+		} else {
+			fmt.Fprintf(out, "msgstr  \"\"\n")
+		}
+		fmt.Fprintf(out, "\n")
+	}
+
+}
+
+// FIXME: this must be setable via go-flags
+type optsT struct {
+	Output string `short:"o" long:"output" description:"output to specified file"`
+
+	AddComments bool `short:"c" long:"add-comments" description:"place all comment blocks preceding keyword lines in output file"`
+
+	AddCommentsTag string `long:"add-comments-tag" description:"place comment blocks starting with TAG and prceding keyword lines in output file"`
+
+	SortOutput bool `short:"s" long:"sort-output" description:"generate sorted output"`
+
+	NoLocation bool `long:"no-location" description:"do not write '#: filename:line' lines"`
+
+	MsgIDBugsAddress string `long:"msgid-bugs-address" default:"EMAIL" description:"set report address for msgid bugs"`
+
+	PackageName string `long:"package-name" description:"set package name in output"`
+
+	Keyword       string `short:"k" long:"keyword" default:"gt.Gettext" description:"look for WORD as the keyword for singular strings"`
+	KeywordPlural string `long:"keyword-plural" default:"gt.NGettext" description:"look for WORD as the keyword for plural strings"`
+}
+
+var opts optsT
+
+type argsT struct{
+	allArgs []string
+	subArgs []string
+}
+
+func  usage(argv0 string, w io.Writer) {
+	fmt.Fprintf(
+		w,
+		"Usage: %s\n",
+		argv0,
+	)
+}
+
+func getopt(allArgs []string, w io.Writer) (argsT, int) {
+	argv0 := allArgs[0]
+	argv  := allArgs[1:]
+	fs := flag.NewFlagSet("", flag.ContinueOnError)
+	fs.Usage = func() {}
+	fs.SetOutput(w)
+
+	output := fs.String(
+		"o",
+		"",
+		"output to specified file",
+	)
+	addComments := fs.Bool(
+		"c",
+		false,
+		"place all comment blocks preceding keyword lines in output file",
+	)
+	addCommentsTag := fs.String(
+		"A",
+		"",
+		"place comment blocks starting with TAG and prceding keyword lines in output file",
+	)
+	sortOutput := fs.Bool(
+		"s",
+		false,
+		"generate sorted output",
+	)
+	noLocation := fs.Bool(
+		"L",
+		false,
+		"do not write '#: filename:line' lines",
+	)
+	msgIDBugsAddress := fs.String(
+		"M",
+		"EMAIL",
+		"set report address for msgid bugs",
+	)
+	packageName := fs.String(
+		"N",
+		"",
+		"set package name in output",
+	)
+	keyword := fs.String(
+		"k",
+		"gt.Gettext",
+		"look for WORD as the keyword for singular strings",
+	)
+	keywordPlural := fs.String(
+		"K",
+		"gt.NGettext",
+		"look for WORD as the keyword for plural strings",
+	)
+
+	if fs.Parse(argv) != nil {
+		usage(argv0, w)
+		return argsT{}, 2
+	}
+
+	opts = optsT{
+		Output: *output,
+		AddComments: *addComments,
+		AddCommentsTag: *addCommentsTag,
+		SortOutput: *sortOutput,
+		NoLocation: *noLocation,
+		MsgIDBugsAddress: *msgIDBugsAddress,
+		PackageName: *packageName,
+		Keyword: *keyword,
+		KeywordPlural: *keywordPlural,
+	}
+
+	subArgs := fs.Args()
+
+	return argsT{
+		allArgs: allArgs,
+		subArgs: subArgs,
+	}, 0
+}
+
+
 func Main() {
+	// parse args
+	/*
+	args, err := flags.ParseArgs(&opts, os.Args)
+	if err != nil {
+		log.Fatalf("ParseArgs failed %s", err)
+	}
+	*/
+
+	g.Init()
+	args, rc := getopt(os.Args, os.Stderr)
+	g.ExitIf(rc)
+
+	if err := processFiles(args.subArgs); err != nil {
+		log.Fatalf("processFiles failed with: %s", err)
+	}
+
+	out := os.Stdout
+	if opts.Output != "" {
+		var err error
+		out, err = os.Create(opts.Output)
+		if err != nil {
+			log.Fatalf("failed to create %s: %s", opts.Output, err)
+		}
+	}
+	writePotFile(out)
 }