NAME

Cvs::Simple - Perl interface to cvs

SYNOPSIS

use Cvs::Simple;

# Basic usage:
chdir('/path/to/sandbox')
  or die "Failed to chdir to sandbox:$!";
my($cvs) = Cvs::Simple->new();
$cvs->add('file.txt');
$cvs->commit();

# Callback

my($commit_callback);
my($commit) = 0;
{
  my($file) = 'file.txt';
  ($commit_callback) = sub {
    my($cmd,$arg) = @_;
    if($arg=~/Checking in $file;/) { ++$commit }
  };
}
my($cvs) = Cvs::Simple->new();
$cvs->callback(commit => $commit_callback);
$cvs->add('file.txt');
$cvs->commit();
croak "Failed to commit file.txt" unless($commit);
$cvs->unset_callback('commit');

DESCRIPTION

Cvs::Simple is an attempt to provide an easy-to-use wrapper that allows cvs commands to be executed from within a Perl program, without the programmer having to wade through the (many) cvs global and command-specific options.

The methods provided follow closely the recipes list in "Pragmatic Version Control with CVS" by Dave Thomas and Andy Hunt (see http://www.pragmaticprogrammer.com/starter_kit/vcc/index.html).

UTILITY METHODS

new ( [ CONFIG_ITEMS ] )

Creates an instance of Cvs::Simple.

CONFIG_ITEMS is a hash of configuration items. Recognised configuration items are:

cvs_bin

external

callback

See the method descriptions below for details of these. If none are specified, CVS::Simple will choose some sensible defaults.

callback ( CMD, CODEREF )

Specify a function pointed to by CODEREF to be executed for every line output by CMD.

Permitted values of CMD are All (executed on every line of output), add, commit, checkout, diff, update. CMD is also permitted to be undef, in which case, it will be assumed to be All.

cvs_cmd passes two arguments to callbacks: the actual command called, and the line returned by CVS.

See the tests for examples of callbacks.

unset_callback ( CMD )

Remove the callback set for CMD.

cvs_bin ( PATH )

Specifies the location and name of the CVS binary. Default to /usr/bin/cvs.

cvs_cmd ( )

cvs_cmd() does the actual work of calling the equivalent CVS command. If any callbacks have been set, they will be executed for every line received from the command. If no callbacks have been set, all output is to STDOUT.

external( REPOSITORY )

Specify an "external" repository. This can be a genuinely remote repository in :ext:user@repos.tld:/path/to/cvsroot format, or an alternative repository on the local host. This will be passed to the -d CVS global option.

CVS METHODS

add ( FILE1, [ .... , FILEx ] )

add_bin ( FILE1, [ .... , FILEx ] )

Add a file or files to the repository; equivalent to cvs add file1, ...., or cvs add -kb file1, ... in the case of add_bin().

co ( TAG, MODULE )

Alias for checkout()

checkout ( MODULE )

checkout ( TAG, MODULE )

Note that co() can be used as an alias for checkout().

ci

Alias for commit().

commit ( )

commit ( FILELIST_ARRAYREF )

commit ( TAG )

commit ( TAG, FILELIST_ARRAYREF )

These are the equivalent of cvs commit -m "", cvs commit -m "" file1, file2, ...., fileN, cvs commit -r TAG -m "" and cvs commit -r TAG -m "" file1, file2, ...., fileN respectively.

Note that ci() can be used as an alias for commit().

diff ( FILE_OR_DIR )

diff ( TAG1, TAG2, FILE_OR_DIR )

FILE_OR_DIR is a single file, or a directory, in the sandbox.

Performs context diff: equivalent to cvs diff -c FILE_OR_DIR or cvs diff -c -rTAG1 -rTAG2 FILE_OR_DIR.

merge ( OLD_REV, NEW_REV, FILENAME )

This is the equivalent of cvs -q update -jOLD_REV -jNEW_REV FILENAME. Note for callback purposes that this is actually an update().

backout ( CURRENT_REV, REVERT_REV, FILENAME )

undo ( CURRENT_REV, REVERT_REV, FILENAME )

Reverts from CURRENT_REV to REVERT_REV. Equivalent to cvs update -jCURRENT_REV -jREVERT_REV FILENAME.

Note that backout() can be used as an alias for undo().

Note that for callback purposes this is actually an update().

upd

Alias for update().

update ( )

update ( FILE1, [ ...., FILEx ] );

Equivalent to cvs -q update -d and cvs -d update file1, ..., filex.

Note that updates to a specific revision (-r) and sticky-tag resets (-A) are not currently supported.

Note that upd() is an alias for update().

up2date ( )

Short-hand for cvs -nq update -d.

status ( )

status( file1 [, ..., ... ] )

Equivalent to cvs status -v.

EXPORT

None by default.

LIMITATIONS AND CAVEATS

1. Note that Cvs::Simple carries out no input validation; everything is passed on to CVS. Similarly, the caller will receive no response on the success (or otherwise) of the transaction, unless appropriate callbacks have been set.

2. The cvs_cmd method is quite simplistic; it's basically a pipe from the equivalent CVS command line (with STDERR redirected). If a more sophisticated treatment, over-ride cvs_cmd, perhaps with something based on IPC::Run (as the Cvs package does).

3. This version of Cvs::Simple has been developed against cvs version 1.11.19. Command syntax may differ in other versions of cvs, and Cvs::Simple method calls may fail in unpredictable ways if other versions are used. Cross-version compatibiility is something I intend to address in a future version.

4. The diff, merge, and undo methods lack proper tests. More tests are required generally.

SEE ALSO

cvs(1), Cvs, VCS::Cvs

AUTHOR

Stephen Cardie, <stephenca@ls26.net>

COPYRIGHT AND LICENSE

Copyright (C) 2007,2008 by Stephen Cardie

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.8 or, at your option, any later version of Perl 5 you may have available.