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- #! /usr/bin/perl
- # -*-Perl-*-
-
- # Author: John Rouillard (rouilj@cs.umb.edu)
- # Supported: Yeah right. (Well what do you expect for 2 hours work?)
- # Blame-to: rouilj@cs.umb.edu
- # Complaints to: Anybody except Brian Berliner, he's blameless for
- # this script.
- # Acknowlegements: The base code for this script has been acquired
- # from the log.pl script.
-
- # rcslock.pl - A program to prevent commits when a file to be ckecked
- # in is locked in the repository.
-
- # There are times when you need exclusive access to a file. This
- # often occurs when binaries are checked into the repository, since
- # cvs's (actually rcs's) text based merging mechanism won't work. This
- # script allows you to use the rcs lock mechanism (rcs -l) to make
- # sure that no changes to a repository are able to be committed if
- # those changes would result in a locked file being changed.
-
- # WARNING:
- # This script will work only if locking is set to strict.
- #
-
- # Setup:
- # Add the following line to the commitinfo file:
-
- # ALL /local/location/for/script/lockcheck [options]
-
- # Where ALL is replaced by any suitable regular expression.
- # Options are -v for verbose info, or -d for debugging info.
- # The %s will provide the repository directory name and the names of
- # all changed files.
-
- # Use:
- # When a developer needs exclusive access to a version of a file, s/he
- # should use "rcs -l" in the repository tree to lock the version they
- # are working on. CVS will automagically release the lock when the
- # commit is performed.
-
- # Method:
- # An "rlog -h" is exec'ed to give info on all about to be
- # committed files. This (header) information is parsed to determine
- # if any locks are outstanding and what versions of the file are
- # locked. This filename, version number info is used to index an
- # associative array. All of the files to be committed are checked to
- # see if any locks are outstanding. If locks are outstanding, the
- # version number of the current file (taken from the CVS/Entries
- # subdirectory) is used in the key to determine if that version is
- # locked. If the file being checked in is locked by the person doing
- # the checkin, the commit is allowed, but if the lock is held on that
- # version of a file by another person, the commit is not allowed.
-
- $ext = ",v"; # The extension on your rcs files.
-
- $\="\n"; # I hate having to put \n's at the end of my print statements
- $,=' '; # Spaces should occur between arguments to print when printed
-
- # turn off setgid
- #
- $) = $(;
-
- #
- # parse command line arguments
- #
- require 'getopts.pl';
-
- &Getopts("vd"); # verbose or debugging
-
- # Verbose is useful when debugging
- $opt_v = $opt_d if defined $opt_d;
-
- # $files[0] is really the name of the subdirectory.
- # @files = split(/ /,$ARGV[0]);
- @files = @ARGV[0..$#ARGV];
- $cvsroot = $ENV{'CVSROOT'};
-
- #
- # get login name
- #
- $login = getlogin || (getpwuid($<))[0] || "nobody";
-
- #
- # save the current directory since we have to return here to parse the
- # CVS/Entries file if a lock is found.
- #
- $pwd = `/bin/pwd`;
- chop $pwd;
-
- print "Starting directory is $pwd" if defined $opt_d ;
-
- #
- # cd to the repository directory and check on the files.
- #
- print "Checking directory ", $files[0] if defined $opt_v ;
-
- if ( $files[0] =~ /^\// )
- {
- print "Directory path is $files[0]" if defined $opt_d ;
- chdir $files[0] || die "Can't change to repository directory $files[0]" ;
- }
- else
- {
- print "Directory path is $cvsroot/$files[0]" if defined $opt_d ;
- chdir ($cvsroot . "/" . $files[0]) ||
- die "Can't change to repository directory $files[0] in $cvsroot" ;
- }
-
-
- # Open the rlog process and apss all of the file names to that one
- # process to cut down on exec overhead. This may backfire if there
- # are too many files for the system buffer to handle, but if there are
- # that many files, chances are that the cvs repository is not set up
- # cleanly.
-
- print "opening rlog -h @files[1..$#files] |" if defined $opt_d;
-
- open( RLOG, "rlog -h @files[1..$#files] |") || die "Can't run rlog command" ;
-
- # Create the locks associative array. The elements in the array are
- # of two types:
- #
- # The name of the RCS file with a value of the total number of locks found
- # for that file,
- # or
- #
- # The name of the rcs file concatenated with the version number of the lock.
- # The value of this element is the name of the locker.
-
- # The regular expressions used to split the rcs info may have to be changed.
- # The current ones work for rcs 5.6.
-
- $lock = 0;
-
- while (<RLOG>)
- {
- chop;
- next if /^$/; # ditch blank lines
-
- if ( $_ =~ /^RCS file: (.*)$/ )
- {
- $curfile = $1;
- next;
- }
-
- if ( $_ =~ /^locks: strict$/ )
- {
- $lock = 1 ;
- next;
- }
-
- if ( $lock )
- {
- # access list: is the line immediately following the list of locks.
- if ( /^access list:/ )
- { # we are done getting lock info for this file.
- $lock = 0;
- }
- else
- { # We are accumulating lock info.
-
- # increment the lock count
- $locks{$curfile}++;
- # save the info on the version that is locked. $2 is the
- # version number $1 is the name of the locker.
- $locks{"$curfile" . "$2"} = $1
- if /[ ]*([a-zA-Z._]*): ([0-9.]*)$/;
-
- print "lock by $1 found on $curfile version $2" if defined $opt_d;
-
- }
- }
- }
-
- # Lets go back to the starting directory and see if any locked files
- # are ones we are interested in.
-
- chdir $pwd;
-
- # fo all of the file names (remember $files[0] is the directory name
- foreach $i (@files[1..$#files])
- {
- if ( defined $locks{$i . $ext} )
- { # well the file has at least one lock outstanding
-
- # find the base version number of our file
- &parse_cvs_entry($i,*entry);
-
- # is our version of this file locked?
- if ( defined $locks{$i . $ext . $entry{"version"}} )
- { # if so, it is by us?
- if ( $login ne ($by = $locks{$i . $ext . $entry{"version"}}) )
- {# crud somebody else has it locked.
- $outstanding_lock++ ;
- print "$by has file $i locked for version " , $entry{"version"};
- }
- else
- { # yeah I have it locked.
- print "You have a lock on file $i for version " , $entry{"version"}
- if defined $opt_v;
- }
- }
- }
- }
-
- exit $outstanding_lock;
-
-
- ### End of main program
-
- sub parse_cvs_entry
- { # a very simple minded hack at parsing an entries file.
- local ( $file, *entry ) = @_;
- local ( @pp );
-
-
- open(ENTRIES, "< CVS/Entries") || die "Can't open entries file";
-
- while (<ENTRIES>)
- {
- if ( $_ =~ /^\/$file\// )
- {
- @pp = split('/');
-
- $entry{"name"} = $pp[1];
- $entry{"version"} = $pp[2];
- $entry{"dates"} = $pp[3];
- $entry{"name"} = $pp[4];
- $entry{"name"} = $pp[5];
- $entry{"sticky"} = $pp[6];
- return;
- }
- }
- }
-