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unified build scheme: give util/dofile.pl the possibility to output selectively

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Under certain conditions, one might not want to output certain
sections of a template file.  This adds the functions output_off() and
output_on(), reachable inside the templates.  And example usage in a
Makefile template could be this:

	@ : {- output_off() if $config{no_shared}; "" -}
	... lines dealing with shared libraries
	@ : {- output_on() -}

Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Richard Levitte 2016-01-30 03:21:39 +01:00
parent 5482dac9f4
commit deb02194d2
1 changed files with 83 additions and 12 deletions
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95
util/dofile.pl
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@ -10,6 +10,24 @@ use warnings;
use Getopt::Std;
# We actually expect to get the following hash tables from configdata:
#
# %config
# %target
# %withargs
# %unified_info
#
# We just do a minimal test to see that we got what we expected.
# $config{target} must exist as an absolute minimum.
die "You must run this script with -Mconfigdata\n" if !exists($config{target});
# Make a subclass of Text::Template to override append_text_to_result,
# as recommended here:
#
# http://search.cpan.org/~mjd/Text-Template-1.46/lib/Text/Template.pm#Automatic_postprocessing_of_template_hunks
package OpenSSL::Template;
# Because we know that Text::Template isn't a core Perl module, we use
# a fallback in case it's not installed on the system
use File::Basename;
@ -17,15 +35,50 @@ use File::Spec::Functions;
use lib catdir(dirname(__FILE__));
use with_fallback qw(Text::Template);
# We actually expect to get the following hash tables from configdata:
#
# %config
# %target
# %withargs
#
# We just do a minimal test to see that we got what we expected.
# $config{target} must exist as an absolute minimum.
die "You must run this script with -Mconfigdata\n" if !exists($config{target});
use parent qw/Text::Template/;
# Override constructor
sub new {
my ($class) = shift;
# Call the constructor of the parent class, Person.
my $self = $class->SUPER::new( @_ );
# Add few more attributes
$self->{_output_off} = 0; # Default to output hunks
bless $self, $class;
return $self;
}
sub append_text_to_output {
my $self = shift;
if ($self->{_output_off} == 0) {
$self->SUPER::append_text_to_output(@_);
}
return;
}
sub output_reset_on {
my $self = shift;
$self->{_output_off} = 0;
}
sub output_on {
my $self = shift;
if (--$self->{_output_off} < 0) {
$self->{_output_off} = 0;
}
}
sub output_off {
my $self = shift;
$self->{_output_off}++;
}
# Come back to main
package main;
# Helper functions for the templates #################################
@ -98,7 +151,7 @@ my @autowarntext = ("WARNING: do not edit!",
my $prev_linecount = 0;
my $text =
@ARGV
? join("", map { my $x = Text::Template::_load_text($_);
? join("", map { my $x = "{- output_reset_on() -}".Text::Template::_load_text($_);
my $linecount = $x =~ tr/\n//;
$prev_linecount = ($linecount += $prev_linecount);
$lines{$linecount} = $_;
@ -110,13 +163,31 @@ my $text =
# Load the full template (combination of files) into Text::Template
# and fill it up with our data. Output goes directly to STDOUT
my $template = Text::Template->new(TYPE => 'STRING', SOURCE => $text );
my $template = OpenSSL::Template->new(TYPE => 'STRING', SOURCE => $text );
sub output_reset_on {
$template->output_reset_on();
"";
}
sub output_on {
$template->output_on();
"";
}
sub output_off {
$template->output_off();
"";
}
$template->fill_in(OUTPUT => \*STDOUT,
HASH => { config => \%config,
target => \%target,
withargs => \%withargs,
unified_info => \%unified_info,
autowarntext => \@autowarntext,
quotify1 => \&quotify1,
quotify_l => \&quotify_l },
quotify_l => \&quotify_l,
output_reset_on => \&output_reset_on,
output_on => \&output_on,
output_off => \&output_off },
DELIMITERS => [ "{-", "-}" ],
BROKEN => \&broken);