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curl/docs/cmdline-opts/gen.pl
Daniel Stenberg 68784d73c3
curl.1: provide examples for each option 
The file format for each option now features a "Example:" header that
can provide one or more examples that get rendered appropriately in the
output. All options MUST have at least one example or gen.pl complains
at build-time.

This fix also does a few other minor format and consistency cleanups.

Closes #7654
2021-09-01 14:02:43 +02:00

503 lines
12 KiB
Perl
Executable File
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#!/usr/bin/env perl
#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
###########################################################################
=begin comment
This script generates the manpage.
Example: gen.pl <command> [files] > curl.1
Dev notes:
We open *input* files in :crlf translation (a no-op on many platforms) in
case we have CRLF line endings in Windows but a perl that defaults to LF.
Unfortunately it seems some perls like msysgit can't handle a global input-only
:crlf so it has to be specified on each file open for text input.
=end comment
=cut
my %optshort;
my %optlong;
my %helplong;
my %arglong;
my %redirlong;
my %protolong;
my %catlong;
# get the long name version, return the man page string
sub manpageify {
my ($k)=@_;
my $l;
if($optlong{$k} ne "") {
# both short + long
$l = "\\fI-".$optlong{$k}.", --$k\\fP";
}
else {
# only long
$l = "\\fI--$k\\fP";
}
return $l;
}
sub printdesc {
my @desc = @_;
for my $d (@desc) {
if($d !~ /^.\\"/) {
# **bold**
$d =~ s/\*\*([^ ]*)\*\*/\\fB$1\\fP/g;
# *italics*
$d =~ s/\*([^ ]*)\*/\\fI$1\\fP/g;
}
# skip lines starting with space (examples)
if($d =~ /^[^ ]/) {
for my $k (keys %optlong) {
my $l = manpageify($k);
$d =~ s/--$k([^a-z0-9_-])/$l$1/;
}
}
# quote "bare" minuses in the output
$d =~ s/( |\\fI|^)--/$1\\-\\-/g;
$d =~ s/([ -]|\\fI|^)-/$1\\-/g;
print $d;
}
}
sub seealso {
my($standalone, $data)=@_;
if($standalone) {
return sprintf
".SH \"SEE ALSO\"\n$data\n";
}
else {
return "See also $data. ";
}
}
sub overrides {
my ($standalone, $data)=@_;
if($standalone) {
return ".SH \"OVERRIDES\"\n$data\n";
}
else {
return $data;
}
}
sub protocols {
my ($standalone, $data)=@_;
if($standalone) {
return ".SH \"PROTOCOLS\"\n$data\n";
}
else {
return "($data) ";
}
}
sub added {
my ($standalone, $data)=@_;
if($standalone) {
return ".SH \"ADDED\"\nAdded in curl version $data\n";
}
else {
return "Added in $data. ";
}
}
sub single {
my ($f, $standalone)=@_;
open(F, "<:crlf", "$f") ||
return 1;
my $short;
my $long;
my $tags;
my $added;
my $protocols;
my $arg;
my $mutexed;
my $requires;
my $category;
my $seealso;
my @examples; # there can be more than one
my $magic; # cmdline special option
my $line;
while(<F>) {
$line++;
if(/^Short: *(.)/i) {
$short=$1;
}
elsif(/^Long: *(.*)/i) {
$long=$1;
}
elsif(/^Added: *(.*)/i) {
$added=$1;
}
elsif(/^Tags: *(.*)/i) {
$tags=$1;
}
elsif(/^Arg: *(.*)/i) {
$arg=$1;
}
elsif(/^Magic: *(.*)/i) {
$magic=$1;
}
elsif(/^Mutexed: *(.*)/i) {
$mutexed=$1;
}
elsif(/^Protocols: *(.*)/i) {
$protocols=$1;
}
elsif(/^See-also: *(.*)/i) {
$seealso=$1;
}
elsif(/^Requires: *(.*)/i) {
$requires=$1;
}
elsif(/^Category: *(.*)/i) {
$category=$1;
}
elsif(/^Example: *(.*)/i) {
push @examples, $1;
}
elsif(/^Help: *(.*)/i) {
;
}
elsif(/^---/) {
if(!$long) {
print STDERR "ERROR: no 'Long:' in $f\n";
exit 1;
}
if(!$category) {
print STDERR "ERROR: no 'Category:' in $f\n";
exit 2;
}
if(!$examples[0]) {
print STDERR "$f:$line:1:ERROR: no 'Example:' present\n";
exit 2;
}
last;
}
else {
chomp;
print STDERR "WARN: unrecognized line in $f, ignoring:\n:'$_';"
}
}
my @desc;
while(<F>) {
push @desc, $_;
}
close(F);
my $opt;
if(defined($short) && $long) {
$opt = "-$short, --$long";
}
elsif($short && !$long) {
$opt = "-$short";
}
elsif($long && !$short) {
$opt = "--$long";
}
if($arg) {
$opt .= " $arg";
}
# quote "bare" minuses in opt
$opt =~ s/( |^)--/$1\\-\\-/g;
$opt =~ s/( |^)-/$1\\-/g;
if($standalone) {
print ".TH curl 1 \"30 Nov 2016\" \"curl 7.52.0\" \"curl manual\"\n";
print ".SH OPTION\n";
print "curl $opt\n";
}
else {
print ".IP \"$opt\"\n";
}
if($protocols) {
print protocols($standalone, $protocols);
}
if($standalone) {
print ".SH DESCRIPTION\n";
}
printdesc(@desc);
undef @desc;
my @foot;
if($seealso) {
my @m=split(/ /, $seealso);
my $mstr;
my $and = 0;
my $num = scalar(@m);
if($num > 2) {
# use commas up to this point
$and = $num - 1;
}
my $i = 0;
for my $k (@m) {
if(!$helplong{$k}) {
print STDERR "WARN: $f see-alsos a non-existing option: $k\n";
}
my $l = manpageify($k);
my $sep = " and";
if($and && ($i < $and)) {
$sep = ",";
}
$mstr .= sprintf "%s$l", $mstr?"$sep ":"";
$i++;
}
push @foot, seealso($standalone, $mstr);
}
if($requires) {
my $l = manpageify($long);
push @foot, "$l requires that the underlying libcurl".
" was built to support $requires. ";
}
if($mutexed) {
my @m=split(/ /, $mutexed);
my $mstr;
for my $k (@m) {
if(!$helplong{$k}) {
print STDERR "WARN: $f mutexes a non-existing option: $k\n";
}
my $l = manpageify($k);
$mstr .= sprintf "%s$l", $mstr?" and ":"";
}
push @foot, overrides($standalone, "This option overrides $mstr. ");
}
if($examples[0]) {
my $s ="";
$s="s" if($examples[1]);
print "\nExample$s:\n.nf\n";
foreach my $e (@examples) {
$e =~ s!\$URL!https://example.com!g;
print " curl $e\n";
}
print ".fi\n";
}
if($added) {
push @foot, added($standalone, $added);
}
if($foot[0]) {
print "\n";
my $f = join("", @foot);
$f =~ s/ +\z//; # remove trailing space
print "$f\n";
}
return 0;
}
sub getshortlong {
my ($f)=@_;
open(F, "<:crlf", "$f");
my $short;
my $long;
my $help;
my $arg;
my $protocols;
my $category;
while(<F>) {
if(/^Short: (.)/i) {
$short=$1;
}
elsif(/^Long: (.*)/i) {
$long=$1;
}
elsif(/^Help: (.*)/i) {
$help=$1;
}
elsif(/^Arg: (.*)/i) {
$arg=$1;
}
elsif(/^Protocols: (.*)/i) {
$protocols=$1;
}
elsif(/^Category: (.*)/i) {
$category=$1;
}
elsif(/^---/) {
last;
}
}
close(F);
if($short) {
$optshort{$short}=$long;
}
if($long) {
$optlong{$long}=$short;
$helplong{$long}=$help;
$arglong{$long}=$arg;
$protolong{$long}=$protocols;
$catlong{$long}=$category;
}
}
sub indexoptions {
my (@files) = @_;
foreach my $f (@files) {
getshortlong($f);
}
}
sub header {
my ($f)=@_;
open(F, "<:crlf", "$f");
my @d;
while(<F>) {
push @d, $_;
}
close(F);
printdesc(@d);
}
sub listhelp {
foreach my $f (sort keys %helplong) {
my $long = $f;
my $short = $optlong{$long};
my @categories = split ' ', $catlong{$long};
my $bitmask;
my $opt;
if(defined($short) && $long) {
$opt = "-$short, --$long";
}
elsif($long && !$short) {
$opt = " --$long";
}
for my $i (0 .. $#categories) {
$bitmask .= 'CURLHELP_' . uc $categories[$i];
# If not last element, append |
if($i < $#categories) {
$bitmask .= ' | ';
}
}
my $arg = $arglong{$long};
if($arg) {
$opt .= " $arg";
}
my $desc = $helplong{$f};
$desc =~ s/\"/\\\"/g; # escape double quotes
my $line = sprintf " {\"%s\",\n \"%s\",\n %s},\n", $opt, $desc, $bitmask;
if(length($opt) > 78) {
print STDERR "WARN: the --$long name is too long\n";
}
elsif(length($desc) > 78) {
print STDERR "WARN: the --$long description is too long\n";
}
print $line;
}
}
sub listcats {
my %allcats;
foreach my $f (sort keys %helplong) {
my @categories = split ' ', $catlong{$f};
foreach (@categories) {
$allcats{$_} = undef;
}
}
my @categories;
foreach my $key (keys %allcats) {
push @categories, $key;
}
@categories = sort @categories;
unshift @categories, 'hidden';
for my $i (0..$#categories) {
print '#define ' . 'CURLHELP_' . uc($categories[$i]) . ' ' . "1u << " . $i . "u\n";
}
}
sub mainpage {
my (@files) = @_;
# show the page header
header("page-header");
# output docs for all options
foreach my $f (sort @files) {
if(single($f, 0)) {
print STDERR "Can't read $f?\n";
}
}
header("page-footer");
}
sub showonly {
my ($f) = @_;
if(single($f, 1)) {
print STDERR "$f: failed\n";
}
}
sub showprotocols {
my %prots;
foreach my $f (keys %optlong) {
my @p = split(/ /, $protolong{$f});
for my $p (@p) {
$prots{$p}++;
}
}
for(sort keys %prots) {
printf "$_ (%d options)\n", $prots{$_};
}
}
sub getargs {
my ($f, @s) = @_;
if($f eq "mainpage") {
mainpage(@s);
return;
}
elsif($f eq "listhelp") {
listhelp();
return;
}
elsif($f eq "single") {
showonly($s[0]);
return;
}
elsif($f eq "protos") {
showprotocols();
return;
}
elsif($f eq "listcats") {
listcats();
return;
}
print "Usage: gen.pl <mainpage/listhelp/single FILE/protos/listcats> [files]\n";
}
#------------------------------------------------------------------------
my $cmd = shift @ARGV;
my @files = @ARGV; # the rest are the files
# learn all existing options
indexoptions(@files);
getargs($cmd, @files);
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