45 lines
1.2 KiB
Perl
Executable File
45 lines
1.2 KiB
Perl
Executable File
#!/usr/bin/env perl
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# Taken from: https://git.parabola.nu/packages/libretools.git/tree/src/chroot-tools/indent?id=f24f9c272ce7b1b8fa1773ed63ca77bfd71ee254
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# Relicensed from GPLv3+ to AGPLv3+.
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#
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# Copyright (C) 2013 Luke Shumaker <lukeshu@parabola.nu>
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# SPDX-License-Identifier: AGPL-3.0-or-later
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use warnings;
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use strict;
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use constant BUFFER_SIZE => 40;
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binmode(STDIN);
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binmode(STDOUT);
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exit(1) if ($#ARGV != 0);
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my $indent = $ARGV[0];
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# 0: no indent has been printed for this line, an indent WILL need to be printed
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# 1: an indent needs to be printed for this line IFF there is any more output on it
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# 2: no indent (currently) needs to be printed for this line
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my $print_indent = 0;
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my $buffer;
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my $size;
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my $c;
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while (1) {
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$size = sysread(STDIN, $buffer, BUFFER_SIZE);
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last if ($size < 1);
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for (0..$size-1) {
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$c = substr($buffer, $_, 1);
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if ($c eq "\n") {
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syswrite(STDOUT, $indent) if ($print_indent == 0);
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syswrite(STDOUT, $c, 1);
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$print_indent = 0;
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} elsif ($c eq "\r") {
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syswrite(STDOUT, $c, 1);
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$print_indent = 1 if ($print_indent == 2);
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} else {
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syswrite(STDOUT, $indent) if ($print_indent < 2);
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syswrite(STDOUT, $c, 1);
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$print_indent = 2;
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}
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}
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}
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