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Rcs - Perl Object Class for Revision Control System. (Displayed)
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Rcs - Perl Object Class for Revision Control System.
Rcs - Perl Object Class for Revision Control System (RCS).
use Rcs;
# Use tags to control how the rcs programs handle errors
# and the use of the rcs -q (quiet) flag.
use Rcs qw(nonFatal Verbose);
The default behavior is to run rcs programs with the -q (quiet) flag,
and to die if any rcs program returns an error.
This Perl module provides an object oriented interface to access
Revision Control System (RCS) utilities. RCS must be installed on
the system prior to using this module. This module should simplify
the creation of an RCS front-end.
The new method may be used as either a class method or an object
method to create a new object.
# called as class method
$obj = Rcs->new;
# called as object method
$newobj = $obj->new;
Note: You may now set the pathname of the working file through the object
constructor. This is the same as calling the pathname method after
calling the new method.
Thus
$obj = Rcs->new($pathname);
is the same as
$obj = Rcs->new;
$obj->pathname($pathname);
See pathname method for additional details.
Besides the object constructor, there are three class methods provided
which effect any newly created objects.
The arcext method sets the RCS archive extension, which is ',v' by
default.
# set/unset RCS archive extension
Rcs->arcext(''); # set no archive extension
Rcs->arcext(',v'); # set archive extension to ',v'
$arc_ext = Rcs->arcext(); # get current archive extension
The bindir method sets the directory path where the RCS executables
(i.e. rcs, ci, co) are located. The default location is '/usr/local/bin'.
# set RCS bin directory
Rcs->bindir('/usr/bin');
# access RCS bin directory
$bin_dir = Rcs->bindir;
The quiet method sets/unsets the quiet mode for the RCS executables.
Quiet mode is set by default.
# set/unset RCS quiet mode
Rcs->quiet(0); # unset quiet mode
Rcs->quiet(1); # set quiet mode
# access RCS quiet mode
$quiet_mode = Rcs->quiet;
These methods may also be called as object methods.
$obj->arcext('');
$obj->bindir('/usr/bin');
$obj->quiet(0);
These methods set the attributes of the RCS object.
The file method is used to set the name of the RCS working file. The
filename must be set before invoking any access of modifier methods on the
object.
$obj->file('mr_anderson.pl');
The arcfile method is used to set the name of the RCS archive file.
Using this method is optional, as the other methods will assume the archive
filename is the same as the working file unless specified otherwise. The
RCS archive extension (default ',v') is automatically added to the filename.
$obj->arcfile('principle_mcvicker.pl');
The workdir methods set the path of the RCS working directory. If not
specified, default path is '.' (current working directory).
$obj->workdir('/usr/local/source');
The rcsdir methods set the path of the RCS archive directory. If not
specified, default path is './RCS'.
$obj->rcsdir('/usr/local/archive');
The pathname method will set both the working filename and archive
directory.
$obj->pathname($RCS_DIR . '/' . 'butthead.c');
and
$obj->pathname($RCS_DIR . '/' . 'butthead.c,v');
are the same as
$obj->rcsdir($RCS_DIR);
$obj->file('butthead.c');
This class provides methods to directly parse the RCS archive file.
The access method returns a list of all user on the access list.
@access_list = $obj->access;
The author method returns the author of the revision. The head revision
is used if no revision argument is passed to method.
# returns the author of revision '1.3'
$author = $obj->author('1.3');
# returns the authos of the head revision
$author = $obj->author;
The head method returns the head revision.
$head = $obj->head;
The lock method returns the locker of the revision. The method returns
null if the revision is unlocked. The head revision is used if no revision
argument is passed to method. When called in list context the lock method
returns a hash of all locks.
# returns locker of revision '1.3'
$locker = $obj->lock('1.3');
# returns locker of head revision
$locker = $obj->lock;
# return hash of all locks
%locks = $obj->lock; # called in list context
foreach $rev (keys %locks) {
$locker = $locks{$rev};
print "User $locker has revision $rev locked\n";
}
The revisions method returns a list of all revisions of archive file.
@revisions = $obj->revisions;
The state method returns the state of the revision. The head revision
is used if no revision argument is passed to method.
# returns state of revision '1.3'
$state = $obj->state('1.3');
# returns state of head revision
$state = $obj->state;
The symbol method returns the symbol(s) associated with a revision.
If called in list context, method returns all symbols associated with
revision. If called in scalar context, method returns last symbol
assciated with a revision. The head revision is used if no revision argument
is passed to method.
# list context, returns all symbols associated with revision 1.3
@symbols = $obj->symbol('1.3');
# list context, returns all symbols associated with head revision
@symbols = $obj->symbol;
# scalar context, returns last symbol associated with revision 1.3
$symbol = $obj->symbol('1.3');
# scalar context, returns last symbol associated with head revision
$symbol = $obj->symbol;
The symbols method returns a hash, keyed by symbol, of all of the revisions
associated with the file.
%symbols = $obj->symbols;
foreach $sym (keys %symbols) {
$rev = $symbols{$sym};
}
The revdate method returns the date of a revision. The returned date format
is the same as the localtime format. When called as a scalar, it returns the
system date number. If called is list context, the list
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) is returned.
# scalar mode
$scalar_date = $obj->revdate;
print "Scalar date number = $scalar_date\n";
$date_str = localtime($scalar_date);
print "Scalar date string = $date_str\n";
# list mode
@list_date = $obj->revdate;
print "List date = @list_date\n";
The dates method returns a hash of revision dates, keyed on revision. The
hash values are system date numbers. When called in scalar mode, the method
returns the most recent revision date.
# list mode
%DatesHash = obj->dates;
@dates_list = sort {$b<=>$a} values %DatesHash;
$MostRecent = $dates_list[0];
# scalar mode
$most_recent = $obj->dates;
print "Most recent date = $most_recent\n";
$most_recent_str = localtime($most_recent);
print "Most recent date string = $most_recent_str\n";
The symrev method returns the revision against which a specified symbol was
defined. If the symbol was not defined against any version of this file, 0 is
returned.
# gets revision that has 'MY_SYMBOL' defined against it
$rev = $obj->symrev('MY_SYMBOL');
The daterev method returns revisions which were created before a specified
date. Method may take one or six arguments. If one arguments is passed, then
the argument is a date number. If six arguments are passed, then they represent
a date string.
# one argument, date number
# gets revisions created before Sun Sep 6 22:23:47 1998
@revs = $obj->daterev(841436420);
# six argument
# gets revisions created before 25th June 1998 16:45:30
@revs = $obj->daterev(1998, 6, 25, 16, 45, 30);
The comments method returns a hash of revision comments, keyed on revision.
A key value of 0 returns the description.
%comments = $obj->comments;
$description = $comments{0};
$comment_1_3 = $comments{'1.3'};
These methods invoke the RCS system utilities.
The ci method calls the RCS ci program.
# check in, and then check out in unlocked state
$obj->ci('-u');
The co method calls the RCS co program.
# check out in locked state
$obj->co('-l');
The rcs method calls the RCS rcs program.
# lock file
$obj->rcs('-l');
The rcsdiff method calls the RCS rcsdiff program. When called in
list context, this method returns the outpout of the rcsdiff program.
When called in scalar context, this method returns the return status of
the rcsdiff program. The return status is 0 for the same, 1 for some
differences, and 2 for error condition.
When called without parameters, rcsdiff does a diff between the current
working file, and the last revision checked in.
# call in list context
@diff_output = $obj->rcsdiff;
# call in scalar context
$changed = $obj->rcsdiff;
if ($changed) {
print "Working file has changed\n";
}
Call rcsdiff with parameters to do a diff between any two revisions.
@diff_output = $obj->rcsdiff('-r1.2', '-r1.1');
The rlog method calls the RCS rlog program. This method returns the
output of the rlog program.
# get complete log output
@rlog_complete = $obj->rlog;
# called with '-h' switch outputs only header information
@rlog_header = $obj->rlog('-h');
print @rlog_header;
The rcsclean method calls the RCS rcsclean program.
# remove working file
$obj->rcsclean;
Using method rcs with the -a switch allows you to add users to
the access list of an RCS archive file.
use Rcs;
$obj = Rcs->new;
$obj->rcsdir("./project_tree/archive");
$obj->workdir("./project_tree/src");
$obj->file("cornholio.pl");
Methos rcs invokes the RCS utility rcs with the same parameters.
@users = qw(beavis butthead);
$obj->rcs("-a@users");
Calling method access returns list of users on access list.
$filename = $obj->file;
@access_list = $obj->access;
print "Users @access_list are on the access list of $filename\n";
Set class variables and create 'RCS' object.
Set bin directory where RCS programs (e.g. rcs, ci, co) reside. The
default is '/usr/local/bin'. This sets the bin directory for all objects.
use Rcs;
Rcs->bindir('/usr/bin');
$obj = Rcs->new;
Set information regarding RCS object. This information includes name of the
working file, directory of working file ('.' by default), and RCS archive
directory ('./RCS' by default).
$obj->rcsdir("./project_tree/archive");
$obj->workdir("./project_tree/src");
$obj->file("cornholio.pl");
$head_rev = $obj->head;
$locker = $obj->lock;
$author = $obj->author;
@access = $obj->access;
@revisions = $obj->revisions;
$filename = $obj->file;
if ($locker) {
print "Head revision $head_rev is locked by $locker\n";
}
else {
print "Head revision $head_rev is unlocked\n";
}
if (@access) {
print "\nThe following users are on the access list of file $filename\n";
map { print "User: $_\n"} @access;
}
print "\nList of all revisions of $filename\n";
foreach $rev (@revisions) {
print "Revision: $rev\n";
}
Set class variables and create 'RCS' object.
Set bin directory where RCS programs (e.g. rcs, ci, co) reside. The
default is '/usr/local/bin'. This sets the bin directory for all objects.
use Rcs;
Rcs->bindir('/usr/bin');
Rcs->quiet(0); # turn off quiet mode
$obj = Rcs->new;
Set information regarding RCS object. This information includes name of
working file, directory of working file ('.' by default), and RCS archive
directory ('./RCS' by default).
$obj->file('cornholio.pl');
# Set RCS archive directory, is './RCS' by default
$obj->rcsdir("./project_tree/archive");
# Set working directory, is '.' by default
$obj->workdir("./project_tree/src");
Check in file using -u switch. This will check in the file, and will then
check out the file in an unlocked state. The -m switch is used to set the
revision comment.
Command:
$obj->ci('-u', '-mRevision Comment');
is equivalent to commands:
$obj->ci('-mRevision Comment');
$obj->co;
Set class variables and create 'RCS' object.
Set bin directory where RCS programs (e.g. rcs, ci, co) reside. The
default is '/usr/local/bin'. This sets the bin directory for all objects.
use Rcs;
Rcs->bindir('/usr/bin');
Rcs->quiet(0); # turn off quiet mode
$obj = Rcs->new;
Set information regarding RCS object. This information includes name of
working file, directory of working file ('.' by default), and RCS archive
directory ('./RCS' by default).
$obj->file('cornholio.pl');
# Set RCS archive directory, is './RCS' by default
$obj->rcsdir("./project_tree/archive");
# Set working directory, is '.' by default
$obj->workdir("./project_tree/src");
Check out file read-only:
$obj->co;
or check out and lock file:
$obj->co('-l');
Method rcsdiff does an diff between revisions.
$obj = Rcs->new;
$obj->bindir('/usr/bin');
$obj->rcsdir("./project_tree/archive");
$obj->workdir("./project_tree/src");
$obj->file("cornholio.pl");
print "Diff of current working file\n";
if ($obj->rcsdiff) { # scalar context
print $obj->rcsdiff; # list context
}
else {
print "Versions are Equal\n";
}
print "\n\nDiff of revisions 1.2 and 1.1\n";
print $obj->rcsdiff('-r1.2', '-r1.1');
Method rcsclean will remove an unlocked working file.
use Rcs;
Rcs->bindir('/usr/bin');
Rcs->quiet(0); # turn off quiet mode
$obj = Rcs->new;
$obj->rcsdir("./project_tree/archive");
$obj->workdir("./project_tree/src");
$obj->file("cornholio.pl");
print "Quiet mode NOT set\n" unless Rcs->quiet;
$obj->rcsclean;
Craig Freter, <craig@freter.com>
David Green, <greendjf@cvhp152.gpt.marconicomms.com>
Jamie O'Shaughnessy, <jamie@thanatar.demon.co.uk>
Raju Krishnamurthy, <raju_k@iname.com>
Copyright (C) 1997,2003 Craig Freter. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
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