ant replaceregex 替换多行 [英] ant replaceregex replace multiline

问题描述

我需要替换文件中的多行字符串，如下所示:

I need replace multiline string in file, like this:

startString
bla bla bla
...
endString

由蚂蚁替换正则表达式.蚂蚁代码:

by ant replaceregex. Ant code:

    <copy file="${file}" tofile="${newFile}" overwrite="true">
        <filterchain>
            <replaceregex pattern="startString(.+)endString" replace="zzz" flags="gmi" byline="true"/>
        </filterchain>      
    </copy>

如果替换文本是单行 - 一切正常，但是当文本是多行时 - 替换正则表达式不起作用.我应该在代码中修复什么?

If text for replace is Single line - all works correct, but when text is multiline - replaceregex doesn't work. What I should fix in my code?

推荐答案

您需要进行一些更改.您有几个设置建议将每一行输入视为单独的输入行，即 byline 属性和 m 标志.在下面，我删除了那些并添加了 s 标志，它将输入文件视为一行输入:

There are a couple of changes you need to do. There are a couple of settings you had suggesting that each line of input should be considered a separate line of input which are the byline attribute and the m flag. In the following I have removed those and also added the s flag which treats the input file a single line of input:

<replaceregex pattern="startString(.+?)endString" replace="zzz"
    flags="gis" byline="false"/>

还要注意在正则表达式中添加了 ?，这使得通配符非贪婪，以防您要匹配多次出现.

Also note the addition of the ? in the regex, this makes the wildcard non greedy in case you have multiple occurrences you want to match.

见

有关更多信息的 ant ReplaceRegExp 文档.

The ant ReplaceRegExp documentation for more.

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