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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-559) Support file patterns in dfs commands
Date Tue, 26 Sep 2006 17:03:52 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-559?page=comments#action_12437888 ] 
            
Doug Cutting commented on HADOOP-559:
-------------------------------------

Overall, this looks great!

Why doesn't it work for local globs?  It's all implemented in the generic code, but, with
an empty hadoop-site.xml (i.e., local fs), then 'bin/hadoop dfs -ls "conf/*.template"' shows
zero results.  I'm mostly just curious.  It seems like it ought to work, but it doesn't (though
that functionality isn't needed).

Also, you add some new public methods to FileSystem.java, listPaths(Path[]) and listPaths(Path[],
PathFilter).  Do these really need to be public?  If so, they need better javadoc, explaining
how they work.

Thanks!

> Support file patterns in dfs commands
> -------------------------------------
>
>                 Key: HADOOP-559
>                 URL: http://issues.apache.org/jira/browse/HADOOP-559
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs
>    Affects Versions: 0.6.2
>            Reporter: Hairong Kuang
>         Assigned To: Arun C Murthy
>             Fix For: 0.7.0
>
>         Attachments: glob.patch
>
>
> Currently DFSShell does not support file patterns in dfs file names. It's quite inconvenient
for users when they need to manipulate multiple files.
> This issue is intended to extend DFSShell to interprete file patterns. A file pattern
contains special special pattern matching characters:
> ?: matches any character
> *: matches zero or more characters
> [abc]: matches a character from character set {a, b, c}
> [a-c]: matches a character from character range: {a...c}
> [^a]: matches a character not in character set or range {a}
> \c:  escape any special meaning of character c
>  

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