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From "Benjamin Bentmann (JIRA)" <j...@codehaus.org>
Subject [jira] Closed: (MNG-4767) Regression in parsing command-line arguments including variables
Date Wed, 25 Aug 2010 17:30:33 GMT

     [ http://jira.codehaus.org/browse/MNG-4767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benjamin Bentmann closed MNG-4767.
----------------------------------

       Resolution: Fixed
    Fix Version/s: 3.0-beta-3
         Assignee: Benjamin Bentmann

Applied in [r989236|http://svn.apache.org/viewvc?view=revision&revision=989236], thanks!

> Regression in parsing command-line arguments including variables
> ----------------------------------------------------------------
>
>                 Key: MNG-4767
>                 URL: http://jira.codehaus.org/browse/MNG-4767
>             Project: Maven 2 & 3
>          Issue Type: Bug
>          Components: Command Line
>    Affects Versions: 3.0-beta-1
>         Environment: Ubuntu, JDK 6. Applies to b2 as well as b1. Originally reported
as: http://netbeans.org/bugzilla/show_bug.cgi?id=189600
>            Reporter: Jesse Glick
>            Assignee: Benjamin Bentmann
>             Fix For: 3.0-beta-3
>
>         Attachments: MNG-3529-revised.diff
>
>
> Sorry for the long scroll bars but it is important to be precise here:
> {noformat}
> test189600$ /space/apache-maven-2.2.1/bin/mvn '-Dexec.args=output is '"'"' ${project.build.directory}'"'"''
-Dexec.executable=echo exec:exec
> [INFO] Scanning for projects...
> [INFO] Searching repository for plugin with prefix: 'exec'.
> [INFO] ------------------------------------------------------------------------
> [INFO] Building test189600 OSGi Bundle
> [INFO]    task-segment: [exec:exec]
> [INFO] ------------------------------------------------------------------------
> [INFO] [exec:exec {execution: default-cli}]
> output is  /tmp/test189600/target
> [INFO] ------------------------------------------------------------------------
> [INFO] BUILD SUCCESSFUL
> [INFO] ------------------------------------------------------------------------
> [INFO] Total time: 1 second
> [INFO] Finished at: Tue Aug 17 12:25:54 EDT 2010
> [INFO] Final Memory: 11M/169M
> [INFO] ------------------------------------------------------------------------
> test189600$ /space/apache-maven-3.0-beta-1/bin/mvn '-Dexec.args=output is '"'"' ${project.build.directory}'"'"''
-Dexec.executable=echo exec:exec
> eval: 1: Bad substitution
> test189600$ 
> {noformat}
> Regression caused by MNG-3529. I would suggest switching to option A, i.e. using the
generally safe {{"$@"}} rather than {{QUOTED_ARGS}}, retesting carefully (is there a straightforward
way to write unit tests for the script?), and punting on the {{MAVEN_OPTS}} problem until
a solution to that can be found which does not regress anything else.
> Note also that using {{exec}} as the last line of a launcher script is wise. Otherwise
you can run into problems with {{SIGTERM}} not being propagated correctly to subprocesses
when forking from another Java app (such as an IDE launching Maven); Ctrl-C from a shell will
work but {{java.lang.Process.destroy}} will kill only the script and not the real Java process.
The workaround is rather cumbersome:
> {noformat}
> # setup, and then launch main process:
> eval ...your stuff... '&'
> PID=$!
> trap "kill $PID" EXIT
> wait $PID
> exitcode=$?
> trap '' EXIT
> # can do cleanup here, or loop
> exit $exitcode
> {noformat}
> Welcome to the joyous world of shell scripting.

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