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https://jira.codehaus.org/browse/MASSEMBLY-424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=280380#comment-280380
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David Boden edited comment on MASSEMBLY-424 at 9/30/11 9:53 AM:
----------------------------------------------------------------
I'd be grateful if an someone "in the know" could either reopen this issue or
spin my comments off into a separate Jira.
With a large build, forking (twice!) to execute an "ls" on Linux to find out
the file attributes (owner, permissions) results in thousands of forked
processes and a huge amount of added build time.
I've cut down my build time by a factor of 10 by:
* Checking out tag 2.2.1 of maven-assembly-plugin
* Changing the following dependency versions:
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-io</artifactId>
<version>2.0.1</version>
AND
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-utils</artifactId>
<version>3.0</version>
* Upgrading to Java 7 - The reason for this is in
PlexusIoResourceAttributeUtils.java line 224, under the newer plexus-io-2.0.1
jar.
* The plexus io utility checks whether we're building under Java 7 and if
we are, uses (fast) Java calls to look at the file properties rather than
forking an "ls".
* It uses Java 7's:
http://download.oracle.com/javase/7/docs/api/java/nio/file/attribute/PosixFilePermissions.html
Hopefully this is very simple to do on the assembly plugin trunk and, by
switching to Java 7, other users can speed up their builds. Any chance of a
proper build with these dependencies upgraded? I've created my own 2.2.1.1 for
now.
was (Author: david.bo...@nomura.com):
I'd be grateful if an someone "in the know" could either reopen this issue
or spin my comments off into a separate Jira.
With a large build, forking (twice!) to execute an "ls" on Linux to find out
the file attributes (owner, permissions) results in thousands of forked
processes and a huge amount of added build time.
I've cut down my build time by a factor of 10 by:
* Checking out tag 2.2.1 of maven-assembly-plugin
* Changing the following dependency versions:
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-io</artifactId>
<version>2.0.1</version>
AND
<groupId>org.codehaus.plexus</groupId>
<artifactId>plexus-utils</artifactId>
<version>3.0</version>
* Upgrading to Java 7 - The reason for this is in
PlexusIoResourceAttributeUtils.java line 224, under the newer plexus-io-2.0.1
jar.
* The plexus io utility checks whether we're building under Java 7 and if
we are, uses (fast) Java calls to look at the file properties rather than
forking an "ls".
* It uses Java 7's:
http://download.oracle.com/javase/7/docs/api/java/nio/file/attribute/PosixFilePermissions.html
Hopefully this is very simple to do on the assembly plugin trunk and, by
switching to Java 7, other users can speed up their builds.
> poor performance of dependencySet in assembly descriptor (compared to using
> maven-dependency-plugin + fileSet)
> --------------------------------------------------------------------------------------------------------------
>
> Key: MASSEMBLY-424
> URL: https://jira.codehaus.org/browse/MASSEMBLY-424
> Project: Maven 2.x Assembly Plugin
> Issue Type: Bug
> Affects Versions: 2.2-beta-4
> Environment: maven 2.1.0, java 6u13, os x 10.5.6, macbook pro 5400rpm
> disk
> Reporter: Cameron Fieber
> Assignee: John Casey
> Priority: Critical
> Fix For: 2.2
>
>
> The performance of the dependencySet element in the assembly descriptor is
> significantly worse than achieving the equivalent result by doing an
> execution of dependency:copy-dependencies and including the
> target/dependencies folder as a fileSet in the assembly descriptor
> replacing:
> <assembly>
> ...
> <dependencySets>
> <dependencySet>
> <outputDirectory>lib</outputDirectory>
> </dependencySet>
> </dependencySets>
> ...
> </assembly>
> with:
> <assembly>
> ...
> <fileSet>
> <directory>${project.build.directory}/dependency</directory>
> <outputDirectory>lib</outputDirectory>
> </fileSet>
> ...
> </assembly>
> and (in pom.xml):
> ...
> <build>
> <plugins>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-dependency-plugin</artifactId>
> <executions>
> <execution>
> <phase>package</phase>
> <goals>
> <goal>copy-dependencies</goal>
> </goals>
> <configuration>
> <includeScope>runtime</includeScope>
> </configuration>
> </execution>
> </executions>
> </plugin>
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-assembly-plugin</artifactId>
> ...
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