152 строки
2.9 KiB
Perl
152 строки
2.9 KiB
Perl
#! /usr/bin/perl -w
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#
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# Written by Adam Byrtek <alpha@debian.org>, 2002
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#
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# extfs to handle patches in unified diff format
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use bytes;
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use strict;
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use POSIX;
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# standard binaries
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my $bzcat = "bzip2 -dc";
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my $gzcat = "zcat";
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my $file = "file";
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# date parsing requires Date::Parse from TimeDate module
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my $parsedates = eval "require Date::Parse";
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sub timef
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{
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# format unix time
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my @time=localtime($_[0]);
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return sprintf "%02d-%02d-%02d %02d:%02d", $time[4]+1, $time[3], $time[5]%100, $time[2], $time[1];
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}
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sub datetime
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{
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# in case of problems fall back to 0 in unix time
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# note: str2time interprets some wrong values (eg. " ") as 'today'
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if ($parsedates && defined (my $t=str2time($_[0]))) {
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return timef($t);
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}
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return timef(0);
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}
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sub list
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{
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my ($f,$d,$state,$pos,$npos);
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my ($uid,$gid)=(`id -nu` || "0",`id -ng` || "0");
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chomp ($uid, $gid);
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import Date::Parse if ($parsedates);
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# state==1 means diff contents, state==0 mens comments
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$state=1;
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$f="";
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while (<I>) {
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if (/^--- /) {
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# start of a new file
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if ($state==1) {
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$npos=tell(I)-length;
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printf "-rw-r--r-- 1 %s %s %d %s %s\n", $uid, $gid, $npos-$pos, datetime($d), $f
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if $f;
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$pos=$npos;
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}
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$state=1;
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s/^--- ([^\s]+).*$/$1/;
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chomp;
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$f=$_;
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$d="";
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} elsif (/^\+\+\+ /) {
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# take date from the +++ field
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s/^\+\+\+ ([^\s]+)\s*//;
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s/^([^\t]+).*$/$1/;
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chomp;
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$d=$_;
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} elsif ($state==1 && !/^([+\- ]|@@)/) {
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# start of comments, end of diff contents
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$npos=tell(I)-length;
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printf "-rw-r--r-- 1 %s %s %d %s %s\n", $uid, $gid, $npos-$pos, datetime($d), $f
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if $f;
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$pos=$npos;
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$state=0;
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}
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}
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$npos=tell(I);
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printf "-rw-r--r-- 1 %s %s %d %s %s\n", $uid, $gid, $npos-$pos, datetime($d), $f
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if $f && $state!=0;
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close I;
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}
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sub copyout
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{
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my ($file,$out)=@_;
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my ($f,$state,$pos);
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open O, "> $out";
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$state=1;
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$f="";
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while (<I>) {
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if (/^--- /) {
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# start of a new file
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if ($state==1) {
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if ($f eq $file) {
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seek(I,-length,1);
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last;
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}
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$pos=tell(I)-length;
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}
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$state=1;
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s/^--- ([^\s]+).*$/$1/;
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chomp;
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$f=$_;
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} elsif ($state==1 && !/^([+\- ]|@@)/) {
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# start of comments, end of diff contents
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if ($f eq $file) {
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seek(I,-length,1);
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last;
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}
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$pos=tell(I)-length;
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$state=0;
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}
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}
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if ($f eq $file) {
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my $here=tell(I);
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seek(I,$pos,0);
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read(I,my $buf,$here-$pos);
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print O $buf;
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}
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close O;
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}
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my $tmp;
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$_=`$file $ARGV[1]`;
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if (/bzip/) {
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$tmp=tmpnam();
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system "$bzcat $ARGV[1] > $tmp";
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open I, "< $tmp";
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} elsif (/gzip/) {
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$tmp=tmpnam();
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system "$gzcat $ARGV[1] > $tmp";
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open I, "< $tmp";
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} else {
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open I, "< $ARGV[1]";
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}
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if ($ARGV[0] eq "list") {
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list;
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exit(0);
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} if ($ARGV[0] eq "copyout") {
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copyout ($ARGV[2], $ARGV[3]);
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exit(0);
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}
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exit(1);
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END {
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system "rm $tmp" if ($tmp);
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}
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