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Editing: diff.pl
#!/usr/bin/perl # # `Diff' program in Perl # Copyright 1998 M-J. Dominus. (mjd-perl-diff@plover.com) # # This program is free software; you can redistribute it and/or modify it # under the same terms as Perl itself. # use Algorithm::Diff qw(diff); bag("Usage: $0 oldfile newfile") unless @ARGV == 2; my ($file1, $file2) = @ARGV; # -f $file1 or bag("$file1: not a regular file"); # -f $file2 or bag("$file2: not a regular file"); -T $file1 or bag("$file1: binary"); -T $file2 or bag("$file2: binary"); open (F1, $file1) or bag("Couldn't open $file1: $!"); open (F2, $file2) or bag("Couldn't open $file2: $!"); chomp(@f1 = <F1>); close F1; chomp(@f2 = <F2>); close F2; $diffs = diff(\@f1, \@f2); exit 0 unless @$diffs; foreach $chunk (@$diffs) { foreach $line (@$chunk) { my ($sign, $lineno, $text) = @$line; printf "%4d$sign %s\n", $lineno+1, $text; } print "--------\n"; } exit 1; sub bag { my $msg = shift; $msg .= "\n"; warn $msg; exit 2; }
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