Current File : //usr/share/dictionaries-common/dc-debconf-default-value.pl
# ----------------------------------------------------------------------------
# dc-debconf-default-value.pl:
# Dealing with default value selection. Functions and definitions.
# ----------------------------------------------------------------------------
# Trying to find a reasonable guess for default ispell dictionary and wordlist
# from the debian-installer settings, envvars or pre-policy symlinks and the
# list of ispell dictionaries and wordlists to be installed
my $dcscript = "/usr/share/dictionaries-common/dc-debconf-select.pl";
my $debug = "yes" if exists $ENV{'DICT_COMMON_DEBUG'};
# Suffixes for different variants. They must be declared here.
my @suffixes = ("",
"-insane",
"-huge",
"-large",
"-medium",
"-small",
"-gut");
my %equivs = ("bg" => "bulgarian",
"ca" => "catalan",
"cs" => "czech",
"da" => "danish",
"de" => "ngerman",
"de:1" => "ogerman",
"de_CH" => "swiss",
"en_US" => "american",
"en_US:1" => "miscfiles",
"en_CA" => "canadian",
"en_CA:1" => "american",
"en_GB" => "british",
"en_AU" => "british",
"eo" => "esperanto",
"es" => "spanish",
"fi" => "finnish",
"fo" => "faroese",
"fr" => "french",
"ga" => "irish",
"gd" => "gaelic",
"gl" => "galician-minimos",
"gv" => "manx",
"hu" => "hungarian",
"it" => "italian",
"lt" => "lithuanian",
"nb" => "norwegian->bokma", # Match bokmal and bokmaal
"nl" => "dutch",
"nn" => "norwegian->nynorsk",
"pl" => "polish",
"pt" => "portuguese",
"pt_BR" => "brazilian",
"ru" => "russian",
"sv" => "swedish",
"tl" => "tagalog",
"uk" => "ukrainian");
my %alternatives = ("ispell" => "ispell-dictionary.hash",
"wordlist" => "dictionary");
# -------------------------------------------------------------
sub dc_debugprint(){
# -------------------------------------------------------------
# Show info if in debug mode
# -------------------------------------------------------------
print STDERR "@_" if $debug;
}
# -------------------------------------------------------------
sub dc_set (){
# -------------------------------------------------------------
# Set debconf value unless already set
# -------------------------------------------------------------
my $guessed = shift;
my $question = $guessed->{'question'};
my $value = $guessed->{'guess'};
my $priority = $guessed->{'priority'};
my ($errorcode, $oldvalue) = get($question);
$oldvalue = "unset" unless $oldvalue;
if ( $errorcode or $oldvalue eq "unset" ){
&dc_debugprint(" dict-common::dc_set: $question: errorcode: $errorcode; priority: $priority\n" .
" Old:[$oldvalue] --> New:[$value]\n");
set("$question","$value");
} elsif ( $oldvalue eq $value ) {
print STDERR " dict-common::dc_set: $question is already set to
[$oldvalue]. Preserving it.\n";
} else {
print STDERR " dict-common::dc_set: Warning: $question is already set to
[$oldvalue].
Not setting to [$value]\n";
}
if ( $debug ){ # --- Check if question value is actually set
($errorcode, $oldvalue) = get($question);
if ( $errorcode ){
print STDERR " dict-common::dc_set: $question reading failed with $errorcode\n";
} elsif ( $oldvalue) {
print STDERR " dict-common::dc_set: $question is set to [$oldvalue]\n";
} else {
print STDERR " dict-common::dc_set: $question value is void, bad thing\n";
}
}
}
# -------------------------------------------------------------
sub dc_extractlangname (){
# -------------------------------------------------------------
# Look if a dict matching $langkey in %equivs is to be installed
# and return the preferred language name if so.
# -------------------------------------------------------------
my $langkey = shift;
my $classinfo = shift;
my $classprefix = $classinfo->{'prefix'};
my $debconf_vals = $classinfo->{'languages'};
my $debconf_defaultvals = $classinfo->{'default_langs'};
my @thevalues = ();
my $thestring;
my $thepackage;
my $thevariant;
my $pkgfullname;
if ( defined $equivs{$langkey} ){
($thepackage,$thevariant) = split ("->",$equivs{$langkey});
foreach my $suffix ( @suffixes ){
if ( $thepackage eq "miscfiles" ){
$pkgfullname = "$thepackage$suffix";
} else {
$pkgfullname = "$classprefix$thepackage$suffix";
}
&dc_debugprint(" dc_extractlangname: Trying package $pkgfullname\n");
if ( defined $debconf_vals->{"$pkgfullname"} ){
if ( defined $debconf_defaultvals->{"$pkgfullname"} ){
$thestring = $debconf_defaultvals->{"$pkgfullname"};
} else {
$thestring = $debconf_vals->{"$pkgfullname"};
}
@thevalues = sort split (/\s*,\s*/,$thestring);
if ( $thevariant ){
@thevalues = grep {/$thevariant/i} @thevalues;
}
@thevalues = sort {
# Sort tex variants last
$a =~ m/tex/i <=> $b =~ m/tex/i
|| $a cmp $b } @thevalues;
if ( scalar @thevalues >= 1 ){
return "$thevalues[0]";
} else {
return;
}
}
}
}
}
# -------------------------------------------------------------
sub dc_guesslang (){
# -------------------------------------------------------------
# Try different combinations of $language and $country and possible
# fallbacks in case dc_extractlangname() does not find a good guess
# -------------------------------------------------------------
my $classinfo = shift;
my $language = shift;
my $country = shift;
my $class = $classinfo->{'class'};
my $classprefix = $classinfo->{'prefix'};
my $msgprefix = "dc_guesslang";
my $priority = "medium";
my $guessed;
&dc_debugprint(" $msgprefix: Looking for langkey matches [$class,$classprefix,$language,$country].\n");
if ( $guessed = &dc_extractlangname("$language" . "_" . uc($country),$classinfo)
|| &dc_extractlangname("$language" . "_" . uc("$country") . ":1",$classinfo)
|| &dc_extractlangname("$language",$classinfo)
|| &dc_extractlangname("$language:1",$classinfo)
){
$priority = "low";
} else {
my @sorted_keys = sort {
# Sort keys matching ^$language_ first
$b =~ m/^$language(\_|:|$)/ cmp $a =~ m/^$language(\_|:|$)/
# Then american english
|| $b =~ m/^en\_US/ cmp $a =~ m/^en\_US/
# Then any english variant
|| $b =~ m/^en\_/ cmp $a =~ m/^en\_/
# Then anything else alphabetically
|| $a cmp $b
} keys %equivs;
&dc_debugprint(" dc_guesslang: Trying an alternative for $class from keys:\n "
. join(', ',@sorted_keys) . "\n");
foreach ( @sorted_keys ){
last if ( $guessed = &dc_extractlangname($_, $classinfo) );
}
}
return { 'guess' => $guessed,
'priority' => $priority,
'class' => $class
} if $guessed;
}
# -------------------------------------------------------------
sub dc_guess_langkey_for_link(){
# -------------------------------------------------------------
# Try guessing langkey after (woody or older) former symlink
# -------------------------------------------------------------
my $class = shift;
my $link = "/etc/alternatives/$alternatives{$class}";
my %reverse_equivs = ();
my $prefix;
my $guess;
my $language;
return unless ( -l $link );
if ( $guess = readlink($link) ){
&dc_debugprint("dictionaries-common.config: Found pre-policy link $link->$guess.");
$guess =~ s/\.hash$//;
$guess =~ s/^.*\///;
$guess =~ s/(\-\.)(small|medium|large)$//;
$guess =~ s/\-english$//;
$guess = "norwegian->bokma" if ($guess =~ m/^bokm.*l$/);
$guess = "norwegian->nynorsk" if ($guess eq "nynorsk");
$guess = "ogerman" if ($guess eq "german");
$guess = "miscfiles" if ($guess eq "web2");
$guess = "danish" if ($guess eq "dansk");
$guess = "french" if ($guess eq "francais");
$guess = "swedish" if ($guess eq "svenska");
&dc_debugprint("dictionaries-common.config: pre-policy link target fine tuned to $guess.\n");
# Build reverse equivs
foreach ( keys %equivs ){
$reverse_equivs{$equivs{$_}} = $_;
}
# Check for a match and return langkey if found
if ( exists $reverse_equivs{$guess} ){
return $reverse_equivs{$guess};
} else {
&dc_debugprint("dictionaries-common.config: No match found for pre-policy symlink $link.\n");
}
}
}
# -------------------------------------------------------------
sub dc_manual_alternative (){
# -------------------------------------------------------------
# Check if woody (or older) alternative exists and is set to manual
# -------------------------------------------------------------
my $class = shift;
my $file = "/var/lib/dpkg/alternatives/$alternatives{$class}";
my $status;
if ( -r $file ){
open(FILE,"< $file") or return;
$status = <FILE>;
close FILE;
$status = "" unless $status;
chomp $status;
return "Manual (previous alternative setting)" if ( $status eq "manual" );
}
}
# -------------------------------------------------------------
sub dc_parse_classinfo (){
# -------------------------------------------------------------
# Gather info for (to be) installed packages for class
# debconf info:
# $classinfo->{'languages'}: pkg -> languages provided by package
# $classinfo->{'default_langs'}: pkg -> default language for package
# Other info
# $classinfo->{'class'}: Class
# $classinfo->{'classprefix'}: Class prefix
# -------------------------------------------------------------
my $class = shift;
return unless $class;
my $question = "shared/packages-$class";
my ($errorcode,$pkgowners) = metaget ($question, "owners");
return if $errorcode;
my %debconf_vals = ();
my %debconf_defaultvals = ();
my %classprefix = ( 'ispell' => "i", "wordlist" => "w" );
foreach my $pkg ( split (/\s*,\s*/,$pkgowners) ){
$debconf_vals{$pkg} = get ("$pkg/languages");
my ($errorcode,$pkgdefaults) = get ("$pkg/defaults");
$debconf_defaultvals{$pkg} = $pkgdefaults unless $errorcode;
}
return {
'class' => $class,
'prefix' => $classprefix{$class},
'languages' => \%debconf_vals,
'default_langs' => \%debconf_defaultvals
} if %debconf_vals;
}
# -----------------------------------------------------------------
sub dc_guess_language_country_strings (){
# -----------------------------------------------------------------
# Try guessing $language $country pairs
# -----------------------------------------------------------------
my $class = shift;
my $di_language = "debian-installer/language";
my $di_country = "debian-installer/country";
my $msgstring = "dict-common.config->dc_guess_language_country_strings";
my $language;
my $country;
my $errorcode;
# First check if we are upgrading from ancient pre-policy setup with
# symlinks set through alternatives and try guessing a langkey
if ( $language = &dc_guess_langkey_for_link($class) ){
&dc_debugprint("$msgstring: Guessed langkey $language from ancient pre-policy symlink.\n");
} else {
# If system is already installed use /etc/default/locale contents.
# Otherwise try looking at debian-installer/language
if ( -e "/etc/default/locale" ){
$language = $ENV{'LANG'} if exists $ENV{'LANG'};
}
if ( $language ){
&dc_debugprint("$msgstring: LANG=$language is to be used.\n") if $language;
} else {
($errorcode,$language) = get($di_language);
$language = '' if $errorcode;
&dc_debugprint("$msgstring: Debconf gives language \"$language\"\n") if $language;
}
}
# Try hard to get a value if nothing was found
$language = $language ||
$ENV{'LANG'} ||
$ENV{'LC_MESSAGES'} ||
$ENV{'LC_ALL'} ||
'';
# Get proper $language $country pairs if $language is available.
if ( $language ){
if ( $language eq "C" or $language eq "POSIX" ){
&dc_debugprint("$msgstring: Using language \"en\" instead of\"$language\"\n");
$language = "en";
} else {
# Deal with de_DE:de_DE@euro:de:en_GB.UTF-8:en like entries
$language = ( split(":",$language) )[0];
$language =~ s/[\.@].*$//; # Remove variant and charset
($language,$country) = split("_",$language);
}
if ( not $country ){
($errorcode,$country) = get($di_country);
if ( $errorcode or not $country ){
$country = "unset";
}
}
# Make sure there is no leading/trailing whitespace.
$language =~ s/^\s+//;
$language =~ s/\s+$//;
$country =~ s/^\s+//;
$country =~ s/\s+$//;
} else {
&dc_debugprint("$msgstring: No language candidate found. Defaulting to \"en_UNSET\"\n");
$language = "en";
$country = "UNSET";
}
return $language, $country;
}
# -----------------------------------------------------------------
sub dc_set_default_value_for_class (){
# -----------------------------------------------------------------
# Try guessing a reasonable default value for given class after
# $language $country pair and set it if found.
# -----------------------------------------------------------------
my $class = shift;
my $msgprefix = "dc_set_default_value_for_class";
my $question = "dictionaries-common/default-$class";
my $oldlink = "/etc/alternatives/$alternatives{$class}";
my $guessed;
if ( my $classinfo = &dc_parse_classinfo($class) ){
# Ancient symlinks may be different for different classes,
my ( $language, $country ) = &dc_guess_language_country_strings($class);
# First try something reasonably close to the lang +country pair
if ( $guessed = &dc_guesslang($classinfo,$language,$country) ){
&dc_debugprint(" $msgprefix: Guessed value ->($class,$language,$country,$guessed->{'guess'},$guessed->{'priority'})\n");
} else {
# Signal an error. This should never happen, thus the critical priority.
&dc_debugprint(" $msgprefix: No good or bad guess found for ($class,$language,$country)\n");
return;
}
# Actually set the value if found
if ( $guessed ) {
$guessed->{'question'} = $question;
&dc_set($guessed);
}
} else {
&dc_debugprint("$msgprefix: No elements found for $class\n");
}
return $guessed;
}
1;
# -----------------------------------------------------------------
# Local Variables:
# perl-indent-level: 2
# coding: utf-8
# End:
Mini Shell