XML - 在XML文件中搜索值

时间:2017-04-25 18:30:24

标签: xml xmlstarlet

我有一个使用xmlstarlet编辑XML文件的脚本:

sudo xmlstarlet ed -L --omit-decl \
-s '//configuration' -t elem -n "property" -v '' \
-s '//configuration/property[last()]' -t elem -n "name" -v "this.is.a.node" \
-s '//configuration/property[last()]' -t elem -n "value" -v "value.for.above.node" \
-s '//configuration' -t elem -n "property" -v '' \
-s '//configuration/property[last()]' -t elem -n "name" -v "this.is.another.node" \
-s '//configuration/property[last()]' -t elem -n "value" -v "value.for.second" \
/path/to/file

结果如下:

    <configuration>
    ....
    ....
    ....
     <property>
        <name>this.is.a.node</name>
        <value>value.for.above.node</value>
      </property>
      <property>
        <name>this.is.another.node</name>
        <value>value.for.second</value>
      </property>
    </configuration>

但问题是,如果脚本运行多次,我会再次添加上面的块。我想避免这种情况,但我不知道该怎么做。我无法在支持条件语句的文档中找到任何内容

1 个答案:

答案 0 :(得分:2)

使用GrayLog

if [[ $(xmlstarlet sel -t -v "count(/configuration/property[name='this.is.a.node'])" /paht/to/file/xml) -eq 1 ]];then echo "there"; else echo "nope"; fi