clean-fex

package main

import (
	"bufio"
	"errors"
	"fmt"
	"io/ioutil"
	"os"
	"strings"
)

func usage() {
	fmt.Println("Please specify a new and old po file")
}

// Modified version a example call from go/src/bufio/example_test.go
func getLine() (string, error) {
	var line string
	scanner := bufio.NewScanner(os.Stdin)
	if scanner.Scan() {
		line = scanner.Text()
	} else {
		return "", errors.New("Could not read line")
	}

	return string(line), nil
}

func linesFromFile(filename string) ([]string, error) {
	content, err := ioutil.ReadFile(filename)
	if err != nil {
		return nil, err
	}

	return strings.Split(string(content), "\n"), nil
}

func main() {
	argc := len(os.Args)
	if argc <= 1 {
		usage()
		return
	}

	filename := os.Args[1]
	lines, err := linesFromFile(filename)

	if err != nil {
		fmt.Println(err)
		return
	}

	lineLen := len(lines)
	for i := 0; i < lineLen; i++ {
		line := lines[i]

		isArticle := strings.Contains(line, "<article>")
		isType := strings.Contains(line, "#. type: Attribute") || strings.Contains(line, "#. type: Content")
		newline := !isType || isArticle

		if i+1 < lineLen && newline {
			if isArticle && !isType {
				line = line[2:]
			}
			fmt.Println(line)
		} else {
			fmt.Print(line)
		}
	}

}