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|
#! /usr/bin/perl
############################################################################
#
# replace -- script for replacing standard text blocks if found in large
# file sets
#
# sample:
# find . -name "*.h" | xargs replace --orig orig.txt --new new.txt
#
# **************************************************************************
############################################################################
if ( @ARGV == 0 ) {
&PrintUsage();
exit 0;
}
%OPTIONS = ( # option perl code
'--help', '&PrintUsage(); exit 0;',
'--usage', '&PrintUsage(); exit 0;',
'-h', '&PrintUsage(); exit 0;',
'-?', '&BrintUsage(); exit 0;',
'--version', '&PrintVersion(); exit 0;',
'-v', '&PrintVersion(); exit 0;',
'--orig', '$next_is_orig = 1;',
'-o', '$next_is_orig = 1;',
'--new', '$next_is_new = 1;',
'-n', '$next_is_new = 1;',
'--debug', '$debug = 1;',
'-d', '$debug = 1;',
);
############################################################################
# separate files from options
$debug = 0;
$make_backups = 1;
$note_failures = 0;
@files = ();
@orig = ();
@new = ();
$next_is_orig = 0;
$next_is_new = 0;
foreach $arg ( @ARGV ) {
if ( $next_is_orig == 1 ) {
open(ORIG, $arg) || die "$0: error opening '$arg'";
@orig = <ORIG>;
chomp(@orig);
close(ORIG);
$next_is_orig = 0;
} elsif ( $next_is_new == 1 ) {
open(NEW, $arg) || die "$0: error opening '$arg'";
@new = <NEW>;
chomp(@new);
close(NEW);
$next_is_new = 0;
} elsif ( defined $OPTIONS{$arg} ) {
eval $OPTIONS{$arg};
} else {
push( @files, $arg );
}
}
if ( scalar(@orig) == 0 ) {
print "scalar(orig) == 0\n";
&PrintUsage();
exit 1;
}
if ( scalar(@files) == 0 ) {
print "scalar(files) == 0\n";
# stdin/stdout is not supported yet
&PrintUsage();
exit 1;
}
foreach $file ( @files ) {
next if ! -f $file;
if ( ! open(CURRENT, $file) ) {
print STDERR "$0: unable to open file '$file'\n";
next;
}
$match = 0;
@current = <CURRENT>;
chomp(@current);
for ( $line = 0; $line < scalar(@current) - scalar(@orig) + 1; $line++ ) {
if ( $current[$line] eq $orig[0] ) {
$local_match = 1;
for ( $off = 1; $off < scalar(@orig) && $local_match == 1; $off++ ) {
$local_match = 0 if ( $current[$line + $off] ne $orig[$off] );
}
if ( $local_match == 1 ) {
splice(@current, $line, scalar(@orig), @new);
$line += scalar(@new);
$match = 1;
}
}
}
if ( $match == 0 ) {
printf "\r%-60s%-18s\n", $file . ":", "no change...";
} else {
printf "\r%-60s%-18s\n", $file . ":", "updating...";
system( "mv $file $file.bak" );
open( FILE, "> $file" ) || die $file, ": ", $!, "\n";
foreach $line ( @current ) {
print FILE $line, "\n";
}
close( FILE );
}
}
# prints program usage
sub PrintUsage { ###########################################################
print <<"END_OF_USAGE";
Usage:
$0 [options] [files...]
Options:
-o, --orig <file> : the original text
-n, --new <file> : the new replacement text
END_OF_USAGE
}
# print CVS version
sub PrintVersion { #########################################################
print '$Id$', "\n";
}
############################################################################
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