Maven查看当前生效的settings.xml

叁歲伎倆 2022-05-28 23:59 115阅读 0赞

用mvn help:effective-settings可以查看当前生效的settings.xml：

mvn help:effective-settings
    
    [INFO] Scanning for projects...
    [INFO] 
    [INFO] ------------------------------------------------------------------------
    [INFO] Building Maven Stub Project (No POM) 1
    [INFO] ------------------------------------------------------------------------
    [INFO] 
    [INFO] --- maven-help-plugin:2.2:effective-settings (default-cli) @ standalone-pom ---
    [INFO] 
    Effective user-specific configuration settings:
    
    <?xml version="1.0" encoding="UTF-8"?>
    
    
    
    
    
    
    
    
    
    
    
    
    
    <settings xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.1.0 http://maven.apache.org/xsd/settings-1.1.0.xsd">
      <localRepository xmlns="http://maven.apache.org/SETTINGS/1.1.0">/root/.m2/repository</localRepository>
      <mirrors xmlns="http://maven.apache.org/SETTINGS/1.1.0">
        <mirror>
          <mirrorOf>central</mirrorOf>
          <name>aliyun maven</name>
          <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
          <id>alimaven</id>
        </mirror>
      </mirrors>
      <pluginGroups xmlns="http://maven.apache.org/SETTINGS/1.1.0">
        <pluginGroup>org.apache.maven.plugins</pluginGroup>
        <pluginGroup>org.codehaus.mojo</pluginGroup>
      </pluginGroups>
    </settings>
    
    [INFO] ------------------------------------------------------------------------
    [INFO] BUILD SUCCESS
    [INFO] ------------------------------------------------------------------------
    [INFO] Total time: 6.348 s
    [INFO] Finished at: 2017-06-09T15:30:37+08:00
    [INFO] Final Memory: 9M/27M
    [INFO] ------------------------------------------------------------------------

*  1
 *  2
 *  3
 *  4
 *  5
 *  6
 *  7
 *  8
 *  9
 *  10
 *  11
 *  12
 *  13
 *  14
 *  15
 *  16
 *  17
 *  18
 *  19
 *  20
 *  21
 *  22
 *  23
 *  24
 *  25
 *  26
 *  27
 *  28
 *  29
 *  30
 *  31
 *  32
 *  33
 *  34
 *  35
 *  36
 *  37
 *  38
 *  39
 *  40
 *  41
 *  42
 *  43
 *  44
 *  45
 *  46
 *  47
 *  48
 *  49
 *  50
 *  51

mvn -X命令可以查看settings.xml文件的读取顺序：

[root@localhost bin]# mvn -X
    Apache Maven 3.5.0 (ff8f5e7444045639af65f6095c62210b5713f426; 2017-04-04T03:39:06+08:00)
    Maven home: /soft/apache-maven-3.5.0
    Java version: 1.7.0_80, vendor: Oracle Corporation
    Java home: /usr/java/jdk1.7.0_80/jre
    Default locale: zh_CN, platform encoding: UTF-8
    OS name: "linux", version: "3.10.0-327.el7.x86_64", arch: "amd64", family: "unix"
    ...
    [DEBUG] Populating class realm maven.api
    [INFO] Error stacktraces are turned on.
    [DEBUG] Message scheme: color
    [DEBUG] Message styles: debug info warning error success failure strong mojo project
    [DEBUG] Reading global settings from /soft/apache-maven-3.5.0/conf/settings.xml
    [DEBUG] Reading user settings from /root/.m2/settings.xml
    [DEBUG] Reading global toolchains from /soft/apache-maven-3.5.0/conf/toolchains.xml
    [DEBUG] Reading user toolchains from /root/.m2/toolchains.xml
    [DEBUG] Using local repository at /root/.m2/repository
    [DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10.0 for /root/.m2/repository
    [INFO] Scanning for projects...
    [DEBUG] Using mirror alimaven (http://maven.aliyun.com/nexus/content/groups/public/) for central (https://repo.maven.apache.org/maven2).
    [DEBUG] Extension realms for project org.apache.maven:standalone-pom:pom:1: (none)
    [DEBUG] Looking up lifecycle mappings for packaging pom from ClassRealm[plexus.core, parent: null]

*  1
 *  2
 *  3
 *  4
 *  5
 *  6
 *  7
 *  8
 *  9
 *  10
 *  11
 *  12
 *  13
 *  14
 *  15
 *  16
 *  17
 *  18
 *  19
 *  20
 *  21
 *  22

总结：   
maven-help-plugin是一个小巧的辅助工具，最简单的help:system可以打印所有可用的环境变量和Java系统属性。help:effective-pom和help:effective-settings最为有用。   
help:effective-pom用于查看当前生效的POM内容，指合并了所有父POM（包括Super POM）后的XML，所以可用于检测POM中某个配置是否生效   
effective-settings可用于查看当前生效的settings.xml文件内容，所以可用于判断某个settings配置是否生效