请教 sed 替换修改 xml 文件问题

sed -e '/^<!--$/d' -e '/^-->$/d' -e 's/<env-entry-value>\/path\/to\/solr_home<\/env-entry-value>/<env-entry-value>\/usr\/solr\/server\/solr<\/env-entry-value>/'

还可以更简洁一点

用 sed 操作 xml 纯粹找麻烦……
写个 python 能省一半时间还不容易出错。

为什么不用 vi 呢？

@uuspider 你那两个去掉 comments 的有点危险，万一前后有空格就匹配不上。
另外不用分 3 条，可以用分号（；）分开： sed -e 's/foo1/bar1/;s/foo2/bar2/;s/foo3/bar3/'

@rrfeng 的确可以用 shell 调用 python 操作，大好，谢谢！

@maskerTUI 因为要用 vagrant 自动生成集群，用 vim 就不方便了

文本能贴全不？

@rrfeng 多谢，现在已经用 python re 搞定了

python <<EOF
import re
fpath = '/usr/tomcat/webapps/solr/WEB-INF/web.xml'
rep_str = '''
<env-entry>
<env-entry-name>solr/home</env-entry-name>
<env-entry-value>/usr/solr/server/solr</env-entry-value>
<env-entry-type>java.lang.String</env-entry-type>
</env-entry>
'''
with open(fpath) as f: text = f.read()
text = re.sub('<!--\s+<env-entry>.*</env-entry>\s+-->', rep_str, text, flags=re.DOTALL)
with open(fpath, 'wb') as f: f.write(text)
EOF

@henryon

<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5"
metadata-complete="true"
>


<!-- Uncomment if you are trying to use a Resin version before 3.0.19.
Their XML implementation isn't entirely compatible with Xerces.
Below are the implementations to use with Sun's JVM.
<system-property javax.xml.xpath.XPathFactory=
"com.sun.org.apache.xpath.internal.jaxp.XPathFactoryImpl"/>
<system-property javax.xml.parsers.DocumentBuilderFactory=
"com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl"/>
<system-property javax.xml.parsers.SAXParserFactory=
"com.sun.org.apache.xerces.internal.jaxp.SAXParserFactoryImpl"/>
-->

<!-- People who want to hardcode their "Solr Home" directly into the
WAR File can set the JNDI property here...
-->
<!--
<env-entry>
<env-entry-name>solr/home</env-entry-name>
<env-entry-value>/usr/solr/server/solr</env-entry-value>
<env-entry-type>java.lang.String</env-entry-type>
</env-entry>
-->

<!-- Any path (name) registered in solrconfig.xml will be sent to that filter -->
<filter>
<filter-name>SolrRequestFilter</filter-name>
<filter-class>org.apache.solr.servlet.SolrDispatchFilter</filter-class>
<!--
Exclude patterns is a list of directories that would be short circuited by the
SolrDispatchFilter. It includes all Admin UI related static content.
NOTE: It is NOT a pattern but only matches the start of the HTTP ServletPath.
-->
<init-param>
<param-name>excludePatterns</param-name>
<param-value>/css/.+,/js/.+,/img/.+,/tpl/.+</param-value>
</init-param>
</filter>

<filter-mapping>
<!--
NOTE: When using multicore, /admin JSP URLs with a core specified
such as /solr/coreName/admin/stats.jsp get forwarded by a
RequestDispatcher to /solr/admin/stats.jsp with the specified core
put into request scope keyed as "org.apache.solr.SolrCore".

It is unnecessary, and potentially problematic, to have the SolrDispatchFilter
configured to also filter on forwards. Do not configure
this dispatcher as <dispatcher>FORWARD</dispatcher>.
-->
<filter-name>SolrRequestFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>Zookeeper</servlet-name>
<servlet-class>org.apache.solr.servlet.ZookeeperInfoServlet</servlet-class>
</servlet>

<servlet>
<servlet-name>LoadAdminUI</servlet-name>
<servlet-class>org.apache.solr.servlet.LoadAdminUiServlet</servlet-class>
</servlet>

<!-- Remove in Solr 5.0 -->
<!-- This sends SC_MOVED_PERMANENTLY (301) for resources that changed in 4.0 -->
<servlet>
<servlet-name>RedirectOldAdminUI</servlet-name>
<servlet-class>org.apache.solr.servlet.RedirectServlet</servlet-class>
<init-param>
<param-name>destination</param-name>
<param-value>${context}/#/</param-value>
</init-param>
</servlet>

<servlet>
<servlet-name>RedirectOldZookeeper</servlet-name>
<servlet-class>org.apache.solr.servlet.RedirectServlet</servlet-class>
<init-param>
<param-name>destination</param-name>
<param-value>${context}/zookeeper</param-value>
</init-param>
</servlet>

<servlet>
<servlet-name>RedirectLogging</servlet-name>
<servlet-class>org.apache.solr.servlet.RedirectServlet</servlet-class>
<init-param>
<param-name>destination</param-name>
<param-value>${context}/#/~logging</param-value>
</init-param>
</servlet>

<servlet>
<servlet-name>SolrRestApi</servlet-name>
<servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
<init-param>
<param-name>org.restlet.application</param-name>
<param-value>org.apache.solr.rest.SolrSchemaRestApi</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>RedirectOldAdminUI</servlet-name>
<url-pattern>/admin/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RedirectOldAdminUI</servlet-name>
<url-pattern>/admin</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RedirectOldZookeeper</servlet-name>
<url-pattern>/zookeeper.jsp</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>RedirectLogging</servlet-name>
<url-pattern>/logging</url-pattern>
</servlet-mapping>

<!-- Servlet Mapping -->
<servlet-mapping>
<servlet-name>Zookeeper</servlet-name>
<url-pattern>/zookeeper</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>LoadAdminUI</servlet-name>
<url-pattern>/admin.html</url-pattern>
</servlet-mapping>

<servlet-mapping>
<servlet-name>SolrRestApi</servlet-name>
<url-pattern>/schema/*</url-pattern>
</servlet-mapping>

<mime-mapping>
<extension>.xsl</extension>
<!-- per http://www.w3.org/TR/2006/PR-xslt20-20061121/ -->
<mime-type>application/xslt+xml</mime-type>
</mime-mapping>

<welcome-file-list>
<welcome-file>admin.html</welcome-file>
</welcome-file-list>

</web-app>

用 python 就是让你别用 re ……

@rrfeng 那咋弄啊？

@tikazyq python 有处理 xml 的类库、模块

sed -i -e '/^<!--$/ {
N; /\n<env-entry>$/ {
N; /\n-->$/ {
s/^<!--\n//; s/\n-->$//
}
}
}' urfile

sed 最好解决了

为什么要螳臂挡车地飞正则处理 XML ……