我们在未来通过以下方式避免这个问题:
1)每个人都使用一个去除尾随空格的编辑器,我们用 LF 保存所有文件。
2) 如果 1) 失败(它可以 - 有人出于某种原因不小心将其保存在 CRLF 中),我们有一个预提交脚本来检查 CRLF 字符:
#!/bin/sh
#
# An example hook script to verify what is about to be committed.
# Called by git-commit with no arguments. The hook should
# exit with non-zero status after issuing an appropriate message if
# it wants to stop the commit.
#
# To enable this hook, rename this file to "pre-commit" and set executable bit
# original by Junio C Hamano
# modified by Barnabas Debreceni to disallow CR characters in commits
if git rev-parse --verify HEAD 2>/dev/null
then
against=HEAD
else
# Initial commit: diff against an empty tree object
against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi
crlf=0
IFS="
"
for FILE in `git diff-index --cached $against`
do
fhash=`echo $FILE | cut -d' ' -f4`
fname=`echo $FILE | cut -f2`
if git show $fhash | grep -EUIlq $'\r$'
then
echo $fname contains CRLF characters
crlf=1
fi
done
if [ $crlf -eq 1 ]
then
echo Some files have CRLF line endings. Please fix it to be LF and try committing again.
exit 1
fi
exec git diff-index --check --cached $against --
该脚本使用 GNU grep,并且可以在 Mac OS X 上运行,但是在其他平台上使用之前应该对其进行测试(我们遇到了 Cygwin 和 BSD grep 的问题)
3)如果我们发现任何空白错误,我们对错误文件使用以下脚本:
#!/usr/bin/env php
<?php
// Remove various whitespace errors and convert to LF from CRLF line endings
// written by Barnabas Debreceni
// licensed under the terms of WFTPL (http://en.wikipedia.org/wiki/WTFPL)
// handle no args
if( $argc <2 ) die( "nothing to do" );
// blacklist
$bl = array( 'smarty' . DIRECTORY_SEPARATOR . 'templates_c' . DIRECTORY_SEPARATOR . '.*' );
// whitelist
$wl = array( '\.tpl', '\.php', '\.inc', '\.js', '\.css', '\.sh', '\.html', '\.txt', '\.htc', '\.afm',
'\.cfm', '\.cfc', '\.asp', '\.aspx', '\.ascx' ,'\.lasso', '\.py', '\.afp', '\.xml',
'\.htm', '\.sql', '\.as', '\.mxml', '\.ini', '\.yaml', '\.yml' );
// remove $argv[0]
array_shift( $argv );
// make file list
$files = getFileList( $argv );
// sort files
sort( $files );
// filter them for blacklist and whitelist entries
$filtered = preg_grep( '#(' . implode( '|', $wl ) . ')$#', $files );
$filtered = preg_grep( '#(' . implode( '|', $bl ) . ')$#', $filtered, PREG_GREP_INVERT );
// fix whitespace errors
fix_whitespace_errors( $filtered );
///////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////
// whitespace error fixer
function fix_whitespace_errors( $files ) {
foreach( $files as $file ) {
// read in file
$rawlines = file_get_contents( $file );
// remove \r
$lines = preg_replace( "/(\r\n)|(\n\r)/m", "\n", $rawlines );
$lines = preg_replace( "/\r/m", "\n", $lines );
// remove spaces from before tabs
$lines = preg_replace( "/\040+\t/m", "\t", $lines );
// remove spaces from line endings
$lines = preg_replace( "/[\040\t]+$/m", "", $lines );
// remove tabs from line endings
$lines = preg_replace( "/\t+$/m", "", $lines );
// remove EOF newlines
$lines = preg_replace( "/\n+$/", "", $lines );
// write file if changed and set old permissions
if( strlen( $lines ) != strlen( $rawlines )){
$perms = fileperms( $file );
// Uncomment to save original files
//rename( $file, $file.".old" );
file_put_contents( $file, $lines);
chmod( $file, $perms );
echo "${file}: FIXED\n";
} else {
echo "${file}: unchanged\n";
}
}
}
// get file list from argument array
function getFileList( $argv ) {
$files = array();
foreach( $argv as $arg ) {
// is a direcrtory
if( is_dir( $arg ) ) {
$files = array_merge( $files, getDirectoryTree( $arg ) );
}
// is a file
if( is_file( $arg ) ) {
$files[] = $arg;
}
}
return $files;
}
// recursively scan directory
function getDirectoryTree( $outerDir ){
$outerDir = preg_replace( ':' . DIRECTORY_SEPARATOR . '$:', '', $outerDir );
$dirs = array_diff( scandir( $outerDir ), array( ".", ".." ) );
$dir_array = array();
foreach( $dirs as $d ){
if( is_dir( $outerDir . DIRECTORY_SEPARATOR . $d ) ) {
$otherdir = getDirectoryTree( $outerDir . DIRECTORY_SEPARATOR . $d );
$dir_array = array_merge( $dir_array, $otherdir );
}
else $dir_array[] = $outerDir . DIRECTORY_SEPARATOR . $d;
}
return $dir_array;
}
?>