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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (PIG-87) Improvements to pig.pl: make pigclient.conf optional; check JAVA_HOME
Date Mon, 04 Feb 2008 21:59:08 GMT

     [ https://issues.apache.org/jira/browse/PIG-87?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alan Gates resolved PIG-87.
---------------------------

       Resolution: Fixed
    Fix Version/s: 0.1.0

Fix checked in, revision 618456.  Thanks Craig.

> Improvements to pig.pl: make pigclient.conf  optional; check JAVA_HOME
> ----------------------------------------------------------------------
>
>                 Key: PIG-87
>                 URL: https://issues.apache.org/jira/browse/PIG-87
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Craig Macdonald
>             Fix For: 0.1.0
>
>         Attachments: pig.pl.patch
>
>
> Brief notes about the pig.pl, and a patch to resolve some of these
> 1. Is conf/pigclient.conf really required?
> pig.pl dies straight away if $ROOT/conf/pigclient.conf does not exist. 
> This is a shame, for a couple of reasons:
>  * the only really necessary detail in pigclient.conf is $pigJarRoot.
>  * $pigJarRoot, $hodRoot and $defaultCluster can be set using 
> pigclient.conf - why cant they also be:
>     (a) worked out from defaults ? - eg $pigJarRoot
>      my $JAR = $0;#/scripts/pig.pl
>       $JAR =~ s/pig\.pl/..\/pig.jar/
>     (b) $hodRoot - seem an obvious example to be configurable using the 
> command line arguments?
>     (c) $defaultCluster - ditto?
>  * if conf/pigclient.conf doesnt exist, pig.pl dies before the --help options can displayed
(big shame)
>     -> means that scripts/pig.pl -h doesnt work out the box as well as most of
>     http://wiki.apache.org/pig/GettingStarted
>  * As far as I can see minimum setup for a new Pig user:
> cd pig
> (ant)
> mkdir conf
> echo "\$pigJarRoot = \"$PWD\"" > conf/pigclient.conf
> mkdir -p libexec/pig//released/
> cp pig.jar libexec/pig//released/
> ROOT=$PWD scripts/pig.pl
> or specify the class path manually.
> 2. Java binary is looked for in a special Yahoo place or in PATH, but 
> JAVA_HOME is not checked, as per other common startup scripts (eg Tomcat).
> 3. looking for java in the path
> `which java 2>&1 > /dev/null`;
> if ($? != 0) {
> I cant help thinking that this would be better/quicker in Perl:
> sub inpath
> {
>     my $bin = shift;
>     foreach my $dir (split /:/, $ENV{PATH})
>     {
>        return 1 if -e $dir/$bin;
>     }
>     return 0;
> }
> If this is deemed desirable, I can update the patch for this sub-issue too.
> Please find attached a patch for pig.pl that resolves issues 1 & 2. This 
> will allow the GettingStarted documentation to perform as expected 
> without all the rigmarole associated with pigclient.conf

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