#!/usr/bin/perl

# ------------------------------------------------------------------------------
# Copyright (c) 2007 Eclipse Foundation, made available under EPL v1.0
# Contributor Karl Matthias
#
# Parse Subversion commits for the dash project
#
# usage:
# get-companies.pl
# svn-extract.pl | svn-parse.pl > TAB_FILE


use strict;
use FileHandle;

# ------------------------------------------------------------------------------
# Globals
my %types = (
	'' => 'none',
	'htm' => 'html',
	'jpg' => 'jpeg'
);
my @keys = (
	'DATE','YEAR','YEARMONTH','YEARMONTHDAY',
	'TOPPROJECT','PROJECT','FILENAME','FILETYPE',
	'REVISION','CHANGE_SIZE','MESSAGE_SIZE',
	'LOGIN','COMPANY'
);
my %temp;
my %values;
my %progress;
my $buffer;
#Mward 072810
my $counter = 0;

# Company to committer map
my %companies;
my %unixlogins;
my @companydata = split /\n/, `cat companies.txt companies-alternate.txt`;
for my $each ( @companydata ) {
        my @wrds = split /\t+/, $each;
        $companies{$wrds[0]} = $wrds[1];
      $wrds[2] =~ s/_/ /g;
        $unixlogins{lc($wrds[2])} = $wrds[0];
}

# Project to file path map
my %projects = split /\s+/, `cat roots-svn.txt`;

# Last revisions dumped (for incremental loads)
my %revisions = split /\s+/, `cat last.revisions`;

# keep track of the project
my $projectid;

# ------------------------------------------------------------------------------
# Do the work!
print "#", map("$_\t", @keys), "\n";
while(<>) {
	next if(/^Changed paths:/); 	# skip Changed paths: line
	next if(/^\s*$/); 		# skip blank lines

	my $progress = $progress{$temp{'PROJECT'}}++;
	print stderr "\nparsing $temp{'PROJECT'}\n" unless $progress or length($temp{'PROJECT'}) < 1;
	print stderr "." unless $progress % 1000;

	#     rev      author    year          time                count
    if(/^r(\d+) \| ([^\|]+) \| (\d+-\d+-\d+) (\d+:\d+:\d+) .*? \| (\d+) line/) {
		$buffer = undef;
		%temp = undef;	
		my @date = split('-', $3);
		$temp{'DATE'} = "$date[0]/$date[1]/$date[2]";
		$temp{'YEAR'} = $date[0];
		$temp{'YEARMONTH'} = $date[0] . $date[1];
		$temp{'YEARMONTHDAY'} = $date[0] . $date[1] . $date[2];
		$temp{'REVISION'} = $1;
		$temp{'CHANGE_SIZE'} = 1; # SVN doesn't report this :(
		$temp{'LOGIN'} = lc($2);
		if( $temp{'LOGIN'} =~ /\s/ ) {
			$temp{'LOGIN'} = $unixlogins{$temp{'LOGIN'}} if( $unixlogins{$temp{'LOGIN'}} );
		}
		$temp{'COMPANY'} = $companies{$temp{'LOGIN'}};
		if(length($temp{'COMPANY'}) < 1) {
			$temp{'COMPANY'} = 'unknown';
		}
		$temp{'MESSAGE_SIZE'} = 0; # reset for counting later
	} elsif(/^   [MAD] (\/.*)/) {
		$buffer .= $_;
	} elsif(/^----------/) {
		# last line, now loop through all the files and output them since we have the real message size
		my @data = split("\n", $buffer);
		my $line;
		foreach $line (@data) {
			$line =~ /^   [MAD] (\/.*)/;
			$temp{'FILENAME'} = $1;
			$temp{'FILETYPE'} = filetype($1);

			$line =~ /^   [MAD] \/([^\/]+)\//;
			$temp{'PROJECT'} = $projectid;
			$temp{'TOPPROJECT'} = topproject($projectid);
			print map("$temp{$_}\t", @keys), "\n";
		}
		if($temp{'REVISION'} > $revisions{$temp{'PROJECT'}}) {
			$revisions{$temp{'PROJECT'}} = $temp{'REVISION'};
		}
	} elsif (/^~~~~~PROJECT: (.*)$/) {
                #mward 072810 clear up problem where 'empty/nonexistant' repos are inserting a single bogus record
                if ( $counter == 0 ){
  		  $projectid = $1;
                  $counter ++;
                } else {
                  #flush the data
		  $buffer = undef;
                  %temp = undef;
                  $projectid = $1;
                  $counter = 0;
                }
	} else { 
		$temp{'MESSAGE_SIZE'} += length();
	}
}

# Write out revision history including any old history that wasn't updated this time
my $key;
my $fh = new FileHandle(">last.revisions") or print stderr "Can't overwrite last.revisions\n";
foreach $key (keys(%revisions)) {
	$fh->print($key . "\t" . $revisions{$key} . "\n");
}
$fh->close();

# ------------------------------------------------------------------------------
# Functions

# Find the top project given the project name
sub topproject {
	my($project) = @_;

	if($project =~ m/\./) {
		$project =~ /^(.*?)\..*?/;
		return $1;
	}

	return $project; # top levels
}

# Try hard to get a good file type from the filename
sub filetype {
	my($filename) = @_;

	my $filetype;
	# keep only everything after the last dot
	my @fields = split(/\./, $filename);
	$filetype = @fields[@fields - 1];
	$filetype =~ s/:.*//; # some SVN filenames are screwy
	if($filetype =~ /\//) {
		$filetype = 'none';
	}

	# override some windows-ized filetypes
	if(defined($types{$filetype})) {
		$filetype = $types{$filetype};
	}
	
	# Ok, return it
	return lc($filetype);
}

# ------------------------------------------------------------------------------
# example commit message:
#
#|r2393 | thallgren | 2007-07-23 03:11:09 -0400 (Mon, 23 Jul 2007) | 1 line
#|Changed paths:
#|   M /org.eclipse.buckminster/trunk/org.eclipse.buckminster.core/src/java/org/eclipse/buckminster/core/metadata/model/BillOfMaterials.java
#|   M /org.eclipse.buckminster/trunk/org.eclipse.buckminster.core/src/java/org/eclipse/buckminster/core/metadata/model/DepNode.java
#|   M /org.eclipse.buckminster/trunk/org.eclipse.buckminster.core/src/java/org/eclipse/buckminster/core/metadata/model/GeneratorNode.java
#|   M /org.eclipse.buckminster/trunk/org.eclipse.buckminster.core/src/java/org/eclipse/buckminster/core/metadata/model/ResolvedNode.java
#|   M /org.eclipse.buckminster/trunk/org.eclipse.buckminster.core/src/java/org/eclipse/buckminster/core/metadata/model/UnresolvedNode.java
#|
#|Fixed issue with skipped nodes causing UnresolvedNodeException
#|------------------------------------------------------------------------------