417 lines
14 KiB
Perl
417 lines
14 KiB
Perl
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# ----------------------------------------------------------------------------
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# dc-debconf-default-value.pl:
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# Dealing with default value selection. Functions and definitions.
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# ----------------------------------------------------------------------------
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# Trying to find a reasonable guess for default ispell dictionary and wordlist
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# from the debian-installer settings, envvars or pre-policy symlinks and the
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# list of ispell dictionaries and wordlists to be installed
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my $dcscript = "/usr/share/dictionaries-common/dc-debconf-select.pl";
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my $debug = "yes" if exists $ENV{'DICT_COMMON_DEBUG'};
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# Suffixes for different variants. They must be declared here.
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my @suffixes = ("",
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"-insane",
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"-huge",
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"-large",
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"-medium",
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"-small",
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"-gut");
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my %equivs = ("bg" => "bulgarian",
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"ca" => "catalan",
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"cs" => "czech",
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"da" => "danish",
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"de" => "ngerman",
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"de:1" => "ogerman",
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"de_CH" => "swiss",
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"en_US" => "american",
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"en_US:1" => "miscfiles",
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"en_CA" => "canadian",
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"en_CA:1" => "american",
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"en_GB" => "british",
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"en_AU" => "british",
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"eo" => "esperanto",
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"es" => "spanish",
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"fi" => "finnish",
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"fo" => "faroese",
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"fr" => "french",
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"ga" => "irish",
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"gd" => "gaelic",
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"gl" => "galician-minimos",
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"gv" => "manx",
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"hu" => "hungarian",
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"it" => "italian",
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"lt" => "lithuanian",
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"nb" => "norwegian->bokma", # Match bokmal and bokmaal
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"nl" => "dutch",
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"nn" => "norwegian->nynorsk",
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"pl" => "polish",
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"pt" => "portuguese",
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"pt_BR" => "brazilian",
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"ru" => "russian",
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"sv" => "swedish",
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"tl" => "tagalog",
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"uk" => "ukrainian");
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my %alternatives = ("ispell" => "ispell-dictionary.hash",
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"wordlist" => "dictionary");
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# -------------------------------------------------------------
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sub dc_debugprint(){
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# -------------------------------------------------------------
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# Show info if in debug mode
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# -------------------------------------------------------------
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print STDERR "@_" if $debug;
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}
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# -------------------------------------------------------------
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sub dc_set (){
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# -------------------------------------------------------------
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# Set debconf value unless already set
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# -------------------------------------------------------------
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my $guessed = shift;
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my $question = $guessed->{'question'};
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my $value = $guessed->{'guess'};
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my $priority = $guessed->{'priority'};
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my ($errorcode, $oldvalue) = get($question);
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$oldvalue = "unset" unless $oldvalue;
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if ( $errorcode or $oldvalue eq "unset" ){
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&dc_debugprint(" dict-common::dc_set: $question: errorcode: $errorcode; priority: $priority\n" .
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" Old:[$oldvalue] --> New:[$value]\n");
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set("$question","$value");
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} elsif ( $oldvalue eq $value ) {
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print STDERR " dict-common::dc_set: $question is already set to
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[$oldvalue]. Preserving it.\n";
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} else {
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print STDERR " dict-common::dc_set: Warning: $question is already set to
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[$oldvalue].
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Not setting to [$value]\n";
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}
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if ( $debug ){ # --- Check if question value is actually set
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($errorcode, $oldvalue) = get($question);
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if ( $errorcode ){
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print STDERR " dict-common::dc_set: $question reading failed with $errorcode\n";
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} elsif ( $oldvalue) {
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print STDERR " dict-common::dc_set: $question is set to [$oldvalue]\n";
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} else {
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print STDERR " dict-common::dc_set: $question value is void, bad thing\n";
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}
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}
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}
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# -------------------------------------------------------------
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sub dc_extractlangname (){
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# -------------------------------------------------------------
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# Look if a dict matching $langkey in %equivs is to be installed
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# and return the preferred language name if so.
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# -------------------------------------------------------------
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my $langkey = shift;
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my $classinfo = shift;
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my $classprefix = $classinfo->{'prefix'};
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my $debconf_vals = $classinfo->{'languages'};
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my $debconf_defaultvals = $classinfo->{'default_langs'};
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my @thevalues = ();
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my $thestring;
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my $thepackage;
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my $thevariant;
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my $pkgfullname;
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if ( defined $equivs{$langkey} ){
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($thepackage,$thevariant) = split ("->",$equivs{$langkey});
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foreach my $suffix ( @suffixes ){
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if ( $thepackage eq "miscfiles" ){
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$pkgfullname = "$thepackage$suffix";
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} else {
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$pkgfullname = "$classprefix$thepackage$suffix";
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}
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&dc_debugprint(" dc_extractlangname: Trying package $pkgfullname\n");
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if ( defined $debconf_vals->{"$pkgfullname"} ){
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if ( defined $debconf_defaultvals->{"$pkgfullname"} ){
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$thestring = $debconf_defaultvals->{"$pkgfullname"};
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} else {
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$thestring = $debconf_vals->{"$pkgfullname"};
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}
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@thevalues = sort split (/\s*,\s*/,$thestring);
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if ( $thevariant ){
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@thevalues = grep {/$thevariant/i} @thevalues;
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}
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@thevalues = sort {
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# Sort tex variants last
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$a =~ m/tex/i <=> $b =~ m/tex/i
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|| $a cmp $b } @thevalues;
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if ( scalar @thevalues >= 1 ){
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return "$thevalues[0]";
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} else {
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return;
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}
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}
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}
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}
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}
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# -------------------------------------------------------------
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sub dc_guesslang (){
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# -------------------------------------------------------------
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# Try different combinations of $language and $country and possible
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# fallbacks in case dc_extractlangname() does not find a good guess
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# -------------------------------------------------------------
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my $classinfo = shift;
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my $language = shift;
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my $country = shift;
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my $class = $classinfo->{'class'};
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my $classprefix = $classinfo->{'prefix'};
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my $msgprefix = "dc_guesslang";
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my $priority = "medium";
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my $guessed;
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&dc_debugprint(" $msgprefix: Looking for langkey matches [$class,$classprefix,$language,$country].\n");
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if ( $guessed = &dc_extractlangname("$language" . "_" . uc($country),$classinfo)
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|| &dc_extractlangname("$language" . "_" . uc("$country") . ":1",$classinfo)
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|| &dc_extractlangname("$language",$classinfo)
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|| &dc_extractlangname("$language:1",$classinfo)
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){
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$priority = "low";
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} else {
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my @sorted_keys = sort {
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# Sort keys matching ^$language_ first
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$b =~ m/^$language(\_|:|$)/ cmp $a =~ m/^$language(\_|:|$)/
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# Then american english
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|| $b =~ m/^en\_US/ cmp $a =~ m/^en\_US/
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# Then any english variant
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|| $b =~ m/^en\_/ cmp $a =~ m/^en\_/
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# Then anything else alphabetically
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|| $a cmp $b
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} keys %equivs;
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&dc_debugprint(" dc_guesslang: Trying an alternative for $class from keys:\n "
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. join(', ',@sorted_keys) . "\n");
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foreach ( @sorted_keys ){
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last if ( $guessed = &dc_extractlangname($_, $classinfo) );
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}
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}
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return { 'guess' => $guessed,
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'priority' => $priority,
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'class' => $class
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} if $guessed;
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}
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# -------------------------------------------------------------
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sub dc_guess_langkey_for_link(){
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# -------------------------------------------------------------
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# Try guessing langkey after (woody or older) former symlink
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# -------------------------------------------------------------
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my $class = shift;
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my $link = "/etc/alternatives/$alternatives{$class}";
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my %reverse_equivs = ();
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my $prefix;
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my $guess;
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my $language;
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return unless ( -l $link );
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if ( $guess = readlink($link) ){
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&dc_debugprint("dictionaries-common.config: Found pre-policy link $link->$guess.");
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$guess =~ s/\.hash$//;
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$guess =~ s/^.*\///;
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$guess =~ s/(\-\.)(small|medium|large)$//;
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$guess =~ s/\-english$//;
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$guess = "norwegian->bokma" if ($guess eq "bokm<6B>l");
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$guess = "norwegian->nynorsk" if ($guess eq "nynorsk");
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$guess = "ogerman" if ($guess eq "german");
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$guess = "miscfiles" if ($guess eq "web2");
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$guess = "danish" if ($guess eq "dansk");
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$guess = "french" if ($guess eq "francais");
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$guess = "swedish" if ($guess eq "svenska");
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&dc_debugprint("dictionaries-common.config: pre-policy link target fine tuned to $guess.\n");
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# Build reverse equivs
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foreach ( keys %equivs ){
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$reverse_equivs{$equivs{$_}} = $_;
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}
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# Check for a match and return langkey if found
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if ( exists $reverse_equivs{$guess} ){
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return $reverse_equivs{$guess};
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} else {
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&dc_debugprint("dictionaries-common.config: No match found for pre-policy symlink $link.\n");
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}
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}
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}
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# -------------------------------------------------------------
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sub dc_manual_alternative (){
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# -------------------------------------------------------------
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# Check if woody (or older) alternative exists and is set to manual
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# -------------------------------------------------------------
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my $class = shift;
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my $file = "/var/lib/dpkg/alternatives/$alternatives{$class}";
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my $status;
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if ( -r $file ){
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open(FILE,"< $file") or return;
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$status = <FILE>;
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close FILE;
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$status = "" unless $status;
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chomp $status;
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return "Manual (previous alternative setting)" if ( $status eq "manual" );
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}
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}
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# -------------------------------------------------------------
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sub dc_parse_classinfo (){
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# -------------------------------------------------------------
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# Gather info for (to be) installed packages for class
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# debconf info:
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# $classinfo->{'languages'}: pkg -> languages provided by package
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# $classinfo->{'default_langs'}: pkg -> default language for package
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# Other info
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# $classinfo->{'class'}: Class
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# $classinfo->{'classprefix'}: Class prefix
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# -------------------------------------------------------------
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my $class = shift;
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return unless $class;
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my $question = "shared/packages-$class";
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my ($errorcode,$pkgowners) = metaget ($question, "owners");
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return if $errorcode;
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my %debconf_vals = ();
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my %debconf_defaultvals = ();
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my %classprefix = ( 'ispell' => "i", "wordlist" => "w" );
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foreach my $pkg ( split (/\s*,\s*/,$pkgowners) ){
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$debconf_vals{$pkg} = get ("$pkg/languages");
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my ($errorcode,$pkgdefaults) = get ("$pkg/defaults");
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$debconf_defaultvals{$pkg} = $pkgdefaults unless $errorcode;
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}
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return {
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'class' => $class,
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'prefix' => $classprefix{$class},
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'languages' => \%debconf_vals,
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'default_langs' => \%debconf_defaultvals
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} if %debconf_vals;
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}
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# -----------------------------------------------------------------
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sub dc_guess_language_country_strings (){
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# -----------------------------------------------------------------
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# Try guessing $language $country pairs
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# -----------------------------------------------------------------
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my $class = shift;
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my $di_language = "debian-installer/language";
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my $di_country = "debian-installer/country";
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my $msgstring = "dict-common.config->dc_guess_language_country_strings";
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my $language;
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my $country;
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my $errorcode;
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# First check if we are upgrading from ancient pre-policy setup with
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# symlinks set through alternatives and try guessing a langkey
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if ( $language = &dc_guess_langkey_for_link($class) ){
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&dc_debugprint("$msgstring: Guessed langkey $language from ancient pre-policy symlink.\n");
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} else {
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# If system is already installed use /etc/default/locale contents.
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# Otherwise try looking at debian-installer/language
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if ( -e "/etc/default/locale" ){
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$language = $ENV{'LANG'} if exists $ENV{'LANG'};
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}
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if ( $language ){
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&dc_debugprint("$msgstring: LANG=$language is to be used.\n") if $language;
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} else {
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($errorcode,$language) = get($di_language);
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$language = '' if $errorcode;
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&dc_debugprint("$msgstring: Debconf gives language \"$language\"\n") if $language;
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}
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}
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# Try hard to get a value if nothing was found
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$language = $language ||
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$ENV{'LANG'} ||
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$ENV{'LC_MESSAGES'} ||
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$ENV{'LC_ALL'} ||
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'';
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# Get proper $language $country pairs if $language is available.
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if ( $language ){
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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: iso-8859-1
|
|||
|
|
# End:
|