用于在属性下添加属性和元素的xmlstartlet shell脚本

Question

我正在尝试在XML文件的现有属性下添加属性。我一直在使用xmlstarted进行编辑，但从未将其用于更新。如果有人告诉如何添加新的attr和在该新的attrb下的元素，将很有帮助-

这是我的xml文件的摘录-

这是我通常用xmlstarlet-的hel; p编辑子元素的操作

xmlstarlet edit  --inplace -u "/allocations/queue[@name='root']/queue[@name='paas_api_q1']/queue[@name='child1_sq1']/minResources" --value "$value" myfile.xml

之前-

<?xml version="1.0"?>
<allocations>
  <queue name="root">
    <aclSubmitApps> bddbagrp,mapr</aclSubmitApps>
    <aclAdministerApps> bddbagrp,root,mapr,trmte_id</aclAdministerApps>
    <schedulingPolicy>drf</schedulingPolicy>
    <defaultMinSharePreemptionTimeout>60</defaultMinSharePreemptionTimeout>
    <fairSharePreemptionTimeout>60</fairSharePreemptionTimeout>
    <queue name="paas_api_q1">
      <minResources>90000 mb,15 vcores,2 disks</minResources>
      <maxResources>135000 mb,22 vcores,3 disks</maxResources>
      <queue name="child1_sq1">
        <minResources>66000 mb,11 vcores,2 disks</minResources>
        <maxResources>264000 mb,44 vcores,8 disks</maxResources>
        <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
        <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
        <label>allnodes||balanced</label>
      </queue>
    </queue>
  </queue>
  <queuePlacementPolicy>
    <rule create="false" name="specified"/>
    <rule name="reject"/>
  </queuePlacementPolicy>
</allocations>

之后看起来应该是这样。在这里​​，我在现有属性下添加了一个新属性-pass_api_q1。

<!-- language: lang-xml -->
<?xml version="1.0"?>
<allocations>
  <queue name="root">
    <aclSubmitApps> bddbagrp,mapr</aclSubmitApps>
    <aclAdministerApps> bddbagrp,root,mapr,trmte_id</aclAdministerApps>
    <schedulingPolicy>drf</schedulingPolicy>
    <defaultMinSharePreemptionTimeout>60</defaultMinSharePreemptionTimeout>
    <fairSharePreemptionTimeout>60</fairSharePreemptionTimeout>
    <queue name="paas_api_q1">
      <minResources>90000 mb,15 vcores,2 disks</minResources>
      <maxResources>135000 mb,22 vcores,3 disks</maxResources>
      <queue name="child1_sq1">
        <minResources>66000 mb,11 vcores,2 disks</minResources>
        <maxResources>264000 mb,44 vcores,8 disks</maxResources>
        <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
        <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
        <label>allnodes||balanced</label>
      </queue>
      <queue name="child2_sq1">
        <minResources>66000 mb,11 vcores,2 disks</minResources>
        <maxResources>132000 mb,22 vcores,4 disks</maxResources>
        <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
        <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
        <label>allnodes||balanced</label>
      </queue>
    </queue>
  </queue>
  <queuePlacementPolicy>
    <rule create="false" name="specified"/>
    <rule name="reject"/>
  </queuePlacementPolicy>
</allocations>

任何帮助/指导将不胜感激。

Answer 1

您可以使用一堆-i / -a / -s添加新元素（see here），但我认为将XSLT与tr结合使用会更容易。您可以将元素放在另一个文件中，然后将其作为参数传递。

示例...

要添加的XML片段（fragment.xml）

<?xml version="1.0"?>
<queue name="child2_sq1">
    <minResources>66000 mb,11 vcores,2 disks</minResources>
    <maxResources>132000 mb,22 vcores,4 disks</maxResources>
    <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
    <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
    <label>allnodes||balanced</label>
</queue>

XSLT（test.xsl）

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:output indent="yes"/>
  <xsl:strip-space elements="*"/>

  <xsl:param name="frag"/>

  <xsl:template match="@*|node()">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
    </xsl:copy>
  </xsl:template>

  <!--If you wanted to make this stylesheet reusable, you could pass a new
  value in for the "match" attribute by selecting this template by its
  "name" value (@name='target').-->
  <xsl:template match="queue[@name='paas_api_q1']" name="target">
    <xsl:copy>
      <xsl:apply-templates select="@*|node()"/>
      <xsl:copy-of select="$frag"/>
    </xsl:copy>
  </xsl:template>

</xsl:stylesheet>

xmlstarlet命令行

xmlstarlet tr test.xsl -p frag='document("fragment.xml")/*' input.xml

输出

<?xml version="1.0"?>
<allocations>
  <queue name="root">
    <aclSubmitApps> bddbagrp,mapr</aclSubmitApps>
    <aclAdministerApps> bddbagrp,root,mapr,trmte_id</aclAdministerApps>
    <schedulingPolicy>drf</schedulingPolicy>
    <defaultMinSharePreemptionTimeout>60</defaultMinSharePreemptionTimeout>
    <fairSharePreemptionTimeout>60</fairSharePreemptionTimeout>
    <queue name="paas_api_q1">
      <minResources>90000 mb,15 vcores,2 disks</minResources>
      <maxResources>135000 mb,22 vcores,3 disks</maxResources>
      <queue name="child1_sq1">
        <minResources>66000 mb,11 vcores,2 disks</minResources>
        <maxResources>264000 mb,44 vcores,8 disks</maxResources>
        <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
        <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
        <label>allnodes||balanced</label>
      </queue>
      <queue name="child2_sq1">
        <minResources>66000 mb,11 vcores,2 disks</minResources>
        <maxResources>132000 mb,22 vcores,4 disks</maxResources>
        <aclSubmitApps> paas_opsauto_admin_unix</aclSubmitApps>
        <aclAdministerApps> paas_opsauto_admin_unix</aclAdministerApps>
        <label>allnodes||balanced</label>
      </queue>
    </queue>
  </queue>
  <queuePlacementPolicy>
    <rule create="false" name="specified"/>
    <rule name="reject"/>
  </queuePlacementPolicy>
</allocations>