mirror of
https://github.com/schoebel/mars
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5eae58a3a4
From caa2cd968be140ed3e91eeb0d30e0c006b55e17a Mon Sep 17 00:00:00 2001 From: Daniel Hermann <daniel.hermann@1und1.de> Date: Thu, 11 Jul 2013 11:45:16 +0200 Subject: [PATCH] gen_config: allow options to be overridden by environment
134 lines
2.7 KiB
Perl
Executable File
134 lines
2.7 KiB
Perl
Executable File
#!/usr/bin/perl
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use strict;
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use warnings;
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use 5.010;
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use Data::Dumper;
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my $DEBUG = 0;
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##
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## Parse Kconfig from STDIN
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##
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my $option;
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my $type;
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my @default;
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my %setByEnv;
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while (my $line = <STDIN>) {
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if ($line =~ /^config\s+(\w+)\W*$/) {
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$option = $1;
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$setByEnv{$option} = $ENV{$option} if exists $ENV{$option};
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printf STDERR "OPTION: %s\n", $option if $DEBUG;
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printf STDERR "ENV: %s='%s'\n", $option, $setByEnv{$option} if $DEBUG && exists $ENV{$option};
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}
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elsif ($line =~ /^\s+(tristate|bool|int|string)\s+.*$/) {
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$type = $1;
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printf STDERR "TYPE: %s\n", $type if $DEBUG;
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}
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elsif ($line =~ /^\s+default\s+(.*)$/) {
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printf STDERR "DEFAULT: %s\n", $1 if $DEBUG;
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push @default, {
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option => $option,
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type => $type,
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value => $1,
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} if $option;
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}
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elsif ($line =~ /^\s+---help---\s+$/) {
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# ignore lines after this by unsetting $option
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undef $option;
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# Kconfig syntax allows to have directives after the help section,
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# but we do not use this freedom here, for simplicity.
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}
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}
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print STDERR Dumper(\@default) if $DEBUG;
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##
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## Print the header
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##
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print qq%
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#ifndef MARS_CONFIG_H
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#define MARS_CONFIG_H
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/*
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* Module default settings from Kconfig
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*
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* If the module is built as an external module, this file provides
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* reasonable default settings for configuration variables CONFIG_*.
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* The defaults are extracted from Kconfig. If you want to change a
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* setting, please edit Kconfig directly and regenerate this file.
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*
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* This file was auto-generated with $0
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* -- DO NOT EDIT MANUALLY --
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*/
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#ifndef CONFIG_MARS_HAVE_BIGMODULE
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#define CONFIG_MARS_HAVE_BIGMODULE
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#endif
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%;
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##
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## Print option defaults
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##
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foreach my $opt (@default) {
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my $optname = $opt->{option};
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my $optval = $opt->{value};
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if (exists $setByEnv{$optname}) {
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print qq%
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/* CONFIG_$optname overridden by ENVIRONMENT */%;
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$optval = $setByEnv{$optname};
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}
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if (!defined($optname) || !defined($optval)) {
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printf(STDERR "SKIPPED option due to missing parameters: optname=%s optval=%s\n",
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$optname||'', $optval||'');
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next;
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}
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given ($opt->{type}) {
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when ('tristate') {
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# ignore tristate
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}
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when ('bool') {
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if ($optval eq 'n') {
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print qq%
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/* CONFIG_$optname is unset */
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%;
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}
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else {
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print qq%
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#ifndef CONFIG_$optname
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#define CONFIG_$optname 1
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#endif
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%;
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}
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}
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when (['int', 'string']) {
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print qq%
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#ifndef CONFIG_$optname
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#define CONFIG_$optname $optval
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#endif
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%;
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}
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}
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}
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print qq%
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#endif /* MARS_CONFIG_H */
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%;
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