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Full Discussion: Slow Producer - Fast consumer
Top Forums UNIX for Dummies Questions & Answers Slow Producer - Fast consumer Post 302469319 by jakeo25 on Friday 5th of November 2010 01:04:39 PM
Old 11-05-2010
Slow Producer - Fast consumer
I would like to loop through a set of directories, performing operation(s) on each one. The basic script** is
Code:
dirs=`find . -name .svn -print`

for f in $dirs; do 
   echo "Processing $f directory .." 
done

Fine and dandy, but here is the problem: the find expression must complete before the do ... done begins. The find process is relatively slow. I would like to have the do .. done work on entries as they are appended to the list. So in essence there are two threads, the find works in the background, and the do consumes $dirs until empty.

How would the do .. done loop "know" that the $dirs is still being populated? Maybe this needs to be changed completely using another method.

Thanks in advance.



** Some of you will recognize the ".svn", as Subversion stores additional copies of data on the local machine in ".svn" directories.
Last edited by vbe; 11-05-2010 at 03:29 PM.. Reason: Code tags please
 

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LEARN ABOUT CENTOS

svn-inject

SVN-INJECT(1)							 Command reference						     SVN-INJECT(1)

NAME

       svn-inject - puts a Debian source package into Subversion repository

SYNOPSIS

       svn-inject [options]
							     package.dsc
							     repository_URL

OPTIONS

       svn-inject accepts the following options on the command-line:

       -h
	   print the help menu

       -v
	   Make the command output verbose

	   Default: Off.

       -q
	   Hide less important messages

	   Default: Off.

       -l
	   Layout type. 1 (default) means package/{trunk,tags,branches,...} scheme, 2 means the {trunk,tags,branches,...}/package scheme.

	   Default: 1

       -t directory
	   Specify the directory where the .orig.tar.gz files are stored on the local machine.

	   Default: Off.

       -d | --do-like=directory
	   Looks at the working directory of some other package and uses its base URL, tarball storage directory and similar checkout target
	   directory.

	   Default: Off.

       -c number
	   Checkout nothing (0), trunk directory (1) or everything (2) when the work is done.

	   Default: 1

       -o
	   Only keep modified files under SVN control (including the debian/ directory), track only parts of upstream branch

	   Default: Off.

       -O | --no-branches
	   Do not create the branches subdirectory at all. This works in a similar way to -o but all changes on upstream files (e.g. meta changes
	   like updating the config.guess and config.sub files) are ignored and the upstream branch is not used.

	   Default: use branches/.

       -s
	   By default, svn-inject used to create .svn/deb-layout after an inject operation if a checkout followed the inject. Since version 0.6.22
	   this behaviour is deprecated.

	   With this parameter svn-inject will replicate the old behaviour.

	   This option was provided since it can be useful when creating a local override file.

	   Default: Off.

       -setprops -set-props
	   Set svn-bp:* props on the debian directory automatically.

	   Default: Off.

SEE ALSO

       /usr/share/doc/svn-buildpackage/()
	   The svn-buildpackage HOWTO manual

       svn-upgrade(1)
	   upgrade source package from a new upstream revision.

       svn(1)
	   Subversion command line client tool

       dpkg-buildpackage(1)
	   Debian source package tools

AUTHORS

       Eduard Bloch
	   This manual page was written by Eduard Bloch in roff.

       Goneri Le Bouder
	   Converted manpages to SGML.

       Neil Williams
	   Converted manpages to DocBook XML and current Debian maintainer

COPYRIGHT

       Copyright (C) 2009 Eduard Bloch

Release: 0.8.2							     May 2009							     SVN-INJECT(1)
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