[jira] Commented: (MCOMPILER-114) Setting the debug option to false still compiles the code with line numbers resulting in increased class file.

[Stephen Bannasch (JIRA)]

    [ 
http://jira.codehaus.org/browse/MCOMPILER-114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=242305#action_242305
 ] 

Stephen Bannasch commented on MCOMPILER-114:
--------------------------------------------

Ahh ... also setting the debuglevel=none parameter is the solution:

_The examples below refer to a jar I am building: mw.jar with a nominal size of 
7.2 MB_

{noformat}
mvn -Dmaven.compiler.debug=true -Dmaven.compiler.debuglevel=none
{noformat}

results in an mw.jar that is just 5.4 MB.

So ... the logic is:

During a regular mvn compile maven.compiler.debug is true and the debug 
resources are added... so far so good, that makes stacktraces useful.

{noformat}
mw.jar => 7.2 MB
{noformat}

Setting maven.compiler.debug to false makes the compiled code smaller ... but 
some debug stuff is still there:

{noformat}
mw.jar => 6.3 MB
{noformat}

Setting maven.compiler.debuglevel to 'none' results in the smallest code size:

{noformat}
mw.jar => 5.4 MB
{noformat}

But only if maven.compiler.debug is also set to true!  If maven.compiler.debug 
is false and  maven.compiler.debuglevel is none:

{noformat}
mw.jar => 6.3 MB
{noformat}

http://maven.apache.org/plugins/maven-compiler-plugin/compile-mojo.html#debuglevel

{quote}
  Keyword list to be appended to the -g command-line switch.
  Legal values are none or a comma-separated list of the
  following keywords: lines, vars, and source. If debuglevel is
  not specified, by default, nothing will be appended to -g. If
  debug is not turned on, this attribute will be ignored.
{quote}

Maven is special ...


> Setting the debug option to false still compiles the code with line numbers 
> resulting in increased class file.
> --------------------------------------------------------------------------------------------------------------
>
>                 Key: MCOMPILER-114
>                 URL: http://jira.codehaus.org/browse/MCOMPILER-114
>             Project: Maven 2.x Compiler Plugin
>          Issue Type: Bug
>    Affects Versions: 2.1
>         Environment: Windows XP Professional Version 5.1.2600 Service Pack 3 
> Build 2600, Dell OptiPlex GX280, Total Physical Memory 4,096.00 MB
>            Reporter: Grzegorz Solecki
>         Attachments: TestApp.zip
>
>
> Given the following example:
> {code:title=Bar.java|borderStyle=solid}
> public class Main {
>    public static void main(String[] args) {
>       for (StackTraceElement stackTraceElement : 
> Thread.currentThread().getStackTrace())
>          System.out.println(stackTraceElement);
>    }
> }
> {code} 
> and pom.xml
> {code:xml}
> <project xmlns="http://maven.apache.org/POM/4.0.0"; 
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
>    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
> http://maven.apache.org/maven-v4_0_0.xsd";>
>    <modelVersion>4.0.0</modelVersion>
>    <groupId>com.greg</groupId>
>    <artifactId>TestApp</artifactId>
>    <version>1</version>
>    <build>
>       <plugins>
>          <plugin>
>             <groupId>org.apache.maven.plugins</groupId>
>             <artifactId>maven-compiler-plugin</artifactId>
>             <configuration>
>                <debug>none</debug>
>                <source>1.5</source>
>                <target>1.5</target>
>             </configuration>
>          </plugin>
>       </plugins>
>    </build>
> </project>
> {code} 
> after compiling and running we get:
> {panel:title=cmd}
> {noformat}
> {TestApp}\target\classes>dir Main.class
> 05/02/2010  XX:XX               564 Main.class
> {TestApp}\target\classes>java -cp . Main
> java.lang.Thread.dumpThreads(Native Method)
> java.lang.Thread.getStackTrace(Thread.java:1383)
> Main.main(Main.java:3)
> {noformat} 
> {panel}
> *NOTE !!!: the number of line (Main.java:3) has been shown*
> However when you compile the same java code using the javac we get:
> {panel:title=cmd}
> {noformat}
> {TestApp}\src\main\java>javac -g:none -source 1.5 -target 1.5 Main.java
> {TestApp}\src\main\java>dir Main.class
> 05/02/2010  XX:XX               477 Main.class
> {TestApp}\src\main\java>java -cp . Main
> java.lang.Thread.dumpThreads(Native Method)
> java.lang.Thread.getStackTrace(Thread.java:1383)
> Main.main(Unknown Source){noformat} 
> {panel}
> *NOTE !!!: the number of line has not been shown*
> Please find the whole sample project in Eclipse that uses m2eclipse plugin, 
> that is configured for using external maven 2.2.1

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