使用ivy编程解析POM依赖，但不使用源代码和javadoc

Question

使用这种方法，当给出库的组织、名称和修订时，我可以成功地解决(但不能检索实际的jars)库的所有依赖关系，所有这些都是通过编程方式使用Apache的。

在解析过程中，它解析给定库的POM和查找父POM (如果指定的话)，Ivy的POM解析器总是尝试解析源和javadoc。 (通常不存在于父POMs )。

问题是，当一个不存在的jar的URL被查询到我们的本地工匠时，刷新它的缓存需要2~3秒，当我有许多具有父POMs的传递依赖项时，总共需要10分钟的依赖解析时间。

例如，下面是当我试图解析Google 17.0时得到的日志消息：

:: loading settings :: url = jar:file:.ivy2/cache/org.apache.ivy/ivy/jars/ivy-2.3.0.jar!/org/apache/ivy/core/settings/ivysettings.xml
:: resolving dependencies :: com.google.guava#guava-envelope;17.0 [not transitive]
    confs: [default]
    validate = true
    refresh = false
resolving dependencies for configuration 'default'
== resolving dependencies for com.google.guava#guava-envelope;17.0 [default]
== resolving dependencies com.google.guava#guava-envelope;17.0->com.google.guava#guava;17.0 [default->master]
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom
    resolver: found md file for com.google.guava#guava;17.0
        => http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom (17.0)
downloading http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom ...
    resolver: downloading http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom
    [SUCCESSFUL ] com.google.guava#guava;17.0!guava.pom(pom.original) (58ms)
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom
    resolver: found md file for com.google.guava#guava-parent;17.0
        => http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom (17.0)
downloading http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom ...
    resolver: downloading http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom
    [SUCCESSFUL ] com.google.guava#guava-parent;17.0!guava-parent.pom(pom.original) (20ms)
    resolver: revision in cache: org.sonatype.oss#oss-parent;7
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-sources.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-sources.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-src.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-src.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-javadoc.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-javadoc.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0-sources.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0-javadoc.jar
    found com.google.guava#guava;17.0 in resolver
    resolved ivy file produced in cache
:: resolution report :: resolve 2593ms :: artifacts dl 0ms
    :: modules in use:
    com.google.guava#guava;17.0 from resolver in [default]
    ---------------------------------------------------------------------
    |                  |            modules            ||   artifacts   |
    |       conf       | number| search|dwnlded|evicted|| number|dwnlded|
    ---------------------------------------------------------------------
    |      default     |   1   |   1   |   1   |   0   ||   0   |   0   |
    ---------------------------------------------------------------------
    report for com.google.guava#guava-envelope;17.0 default produced in .ivy2/cantabile/com.google.guava-guava-envelope-default.xml
    resolve done (2593ms resolve - 0ms download)

您可以看到，常春藤在尝试不存在的-sources.jar、-src.jar、-javadoc.jar URL时浪费了几秒钟。

在解析父POM时是否有禁用此行为的选项？理想情况下，我不希望在解析期间向任何.jar发出HTTP请求。目前，我需要一个编程解决方案，但是如果有人知道命令行/XML选项，这将是一个很大的帮助。

PS:我认为在使用sbt解决库依赖关系时也是如此；解析oss-parent、commons-parent等需要很长时间。

Answer 1

您需要指定一个配置映射，它既排除了可选依赖项，也排除了源代码和javadoc文件等隐式依赖关系。

在常春藤文件中，您将按照以下方式声明依赖项：

<dependency org="myorg" name="mymodule" rev="1.0" conf="default"/>

另一个选项是将此依赖映射声明为项目的默认映射。

<dependencies defaultconfmapping="default">
  <dependency ..
  <dependency ..

请参见以下相关问题:如何排除源以及常春藤如何翻译Maven存储库：

• 在常春藤检索中忽略源jar
• 如何将maven作用域映射到常春藤配置

总之，默认情况下，Maven模块只有一个部分。可以存储更多内容(比如源和Javadocs)，但是没有列出它们的模块元数据。这就是为什么Ivy执行一个HTTP请求来查看这些人工制品是否存在。更改配置映射设置应该有助于指导常春藤做正确的事情:-)

PS

我认为这可以通过调用DefaultDependencyDescriptor对象的“DefaultDependencyDescriptor”方法来完成。