mirror of
https://github.com/fish-shell/fish-shell.git
synced 2024-11-24 20:24:19 +08:00
114 lines
2.9 KiB
Perl
Executable File
Vendored
114 lines
2.9 KiB
Perl
Executable File
Vendored
#! /usr/bin/perl -w
|
|
|
|
# Script to take the output of nroff -man and remove all the backspacing and
|
|
# the page footers and the screen commands etc so that it is more usefully
|
|
# readable online. In fact, in the latest nroff, intermediate footers don't
|
|
# seem to be generated any more.
|
|
|
|
$blankcount = 0;
|
|
$lastwascut = 0;
|
|
$firstheader = 1;
|
|
|
|
# Input on STDIN; output to STDOUT.
|
|
|
|
while (<STDIN>)
|
|
{
|
|
s/\x1b\[\d+m//g; # Remove screen controls "ESC [ number m"
|
|
s/.\x8//g; # Remove "char, backspace"
|
|
|
|
# Handle header lines. Retain only the first one we encounter, but remove
|
|
# the blank line that follows. Any others (e.g. at end of document) and the
|
|
# following blank line are dropped.
|
|
|
|
if (/^PCRE(\w*)\(([13])\)\s+PCRE\1\(\2\)$/)
|
|
{
|
|
if ($firstheader)
|
|
{
|
|
$firstheader = 0;
|
|
print;
|
|
$lastprinted = $_;
|
|
$lastwascut = 0;
|
|
}
|
|
$_=<STDIN>; # Remove a blank that follows
|
|
next;
|
|
}
|
|
|
|
# Count runs of empty lines
|
|
|
|
if (/^\s*$/)
|
|
{
|
|
$blankcount++;
|
|
$lastwascut = 0;
|
|
next;
|
|
}
|
|
|
|
# If a chunk of lines has been cut out (page footer) and the next line
|
|
# has a different indentation, put back one blank line.
|
|
|
|
if ($lastwascut && $blankcount < 1 && defined($lastprinted))
|
|
{
|
|
($a) = $lastprinted =~ /^(\s*)/;
|
|
($b) = $_ =~ /^(\s*)/;
|
|
$blankcount++ if ($a ne $b);
|
|
}
|
|
|
|
# We get here only when we have a non-blank line in hand. If it was preceded
|
|
# by 3 or more blank lines, read the next 3 lines and see if they are blank.
|
|
# If so, remove all 7 lines, and remember that we have just done a cut.
|
|
|
|
if ($blankcount >= 3)
|
|
{
|
|
for ($i = 0; $i < 3; $i++)
|
|
{
|
|
$next[$i] = <STDIN>;
|
|
$next[$i] = "" if !defined $next[$i];
|
|
$next[$i] =~ s/\x1b\[\d+m//g; # Remove screen controls "ESC [ number m"
|
|
$next[$i] =~ s/.\x8//g; # Remove "char, backspace"
|
|
}
|
|
|
|
# Cut out chunks of the form <3 blanks><non-blank><3 blanks>
|
|
|
|
if ($next[0] =~ /^\s*$/ &&
|
|
$next[1] =~ /^\s*$/ &&
|
|
$next[2] =~ /^\s*$/)
|
|
{
|
|
$blankcount -= 3;
|
|
$lastwascut = 1;
|
|
}
|
|
|
|
# Otherwise output the saved blanks, the current, and the next three
|
|
# lines. Remember the last printed line.
|
|
|
|
else
|
|
{
|
|
for ($i = 0; $i < $blankcount; $i++) { print "\n"; }
|
|
print;
|
|
for ($i = 0; $i < 3; $i++)
|
|
{
|
|
$next[$i] =~ s/.\x8//g;
|
|
print $next[$i];
|
|
$lastprinted = $_;
|
|
}
|
|
$lastwascut = 0;
|
|
$blankcount = 0;
|
|
}
|
|
}
|
|
|
|
# This non-blank line is not preceded by 3 or more blank lines. Output
|
|
# any blanks there are, and the line. Remember it. Force two blank lines
|
|
# before headings.
|
|
|
|
else
|
|
{
|
|
$blankcount = 2 if /^\S/ && !/^Last updated/ && !/^Copyright/ &&
|
|
defined($lastprinted);
|
|
for ($i = 0; $i < $blankcount; $i++) { print "\n"; }
|
|
print;
|
|
$lastprinted = $_;
|
|
$lastwascut = 0;
|
|
$blankcount = 0;
|
|
}
|
|
}
|
|
|
|
# End
|