Question

在执行关联的阶段时，是否总是执行var s = "Author: Tiara Jordan Date: 02/23/17 Title: The Big Bang Theory"; var t = "t"; console.log(s.replace( new RegExp("\\b(Date|Author|Title)\\b|" + t.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), "gi"), (x,y) => y ? y : `<strong>${x}</strong>`) )和pre阶段？例如，如果我做post，这也将执行mvn clean阶段吗？

我正在看https://maven.apache.org/guides/introduction/introduction-to-the-lifecycle.html#Lifecycle_Reference，其中说：

以下列出了默认，清理和站点的所有构建阶段生命周期，按照给定的顺序执行，直到指定的那个。

严格来说，由于mvn post-clean在post-clean之后，所以如果我只是clean就不应该执行它。但是我的直觉是不同的-尽管我没有找到一种方法来验证这一点，因为maven stdout不会打印其执行的阶段。

任何人都可以权衡答案以及您如何验证？

Answer 1

您可以将插件（例如echo-maven-plugin）绑定到clean生命周期的各个阶段，以帮助验证是否/何时执行每个阶段。

例如，给定以下插件定义：

<plugin>
    <groupId>com.github.ekryd.echo-maven-plugin</groupId>
    <artifactId>echo-maven-plugin</artifactId>
    <version>1.2.0</version>
    <executions>
        <execution>
            <id>pre-clean</id>
            <phase>pre-clean</phase>
            <goals>
                <goal>echo</goal>
            </goals>
            <configuration>
                <message>In 'pre-clean'</message>
            </configuration>
        </execution>
        <execution>
            <id>clean</id>
            <phase>clean</phase>
            <goals>
                <goal>echo</goal>
            </goals>
            <configuration>
                <message>In 'clean'</message>
            </configuration>
        </execution>
        <execution>
            <id>post-clean</id>
            <phase>post-clean</phase>
            <goals>
                <goal>echo</goal>
            </goals>
            <configuration>
                <message>In 'post-clean'</message>
            </configuration>
        </execution>
    </executions>
</plugin>

调用mvn clean将产生以下输出：

$ mvn clean
[INFO] Scanning for projects...
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (pre-clean) @ sandbox ---
[INFO] In 'pre-clean'
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ sandbox ---
[INFO] Deleting target
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (clean) @ sandbox ---
[INFO] In 'clean'

因此，那里没有post-clean阶段的调用。

调用mvn clean compile将产生以下输出：

$ mvn clean compile
[INFO] Scanning for projects...
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (pre-clean) @ sandbox ---
[INFO] In 'pre-clean'
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ sandbox ---
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (clean) @ sandbox ---
[INFO] In 'clean'
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ sandbox ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 1 resource
[INFO] 
[INFO] --- maven-compiler-plugin:3.5.1:compile (default-compile) @ sandbox ---
[INFO] Changes detected - recompiling the module!
[INFO] Compiling 5 source files to ...

同样，这里没有调用post-clean阶段。这意味着maven-clean-plugin（也许没有其他）未绑定到post-clean。

调用mvn post-clean 将导致post-clean阶段被调用...

$ mvn post-clean
[INFO] Scanning for projects...
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (pre-clean) @ sandbox ---
[INFO] In 'pre-clean'
[INFO] 
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ sandbox ---
[INFO] Deleting target
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (clean) @ sandbox ---
[INFO] In 'clean'
[INFO] 
[INFO] --- echo-maven-plugin:1.2.0:echo (post-clean) @ sandbox ---
[INFO] In 'post-clean'

因此，基于以上测试，我认为以下陈述是正确的：

post-clean

不会调用

clean

post-clean

pre-

post-

Maven的“前”和“后”阶段

1 个答案: