1 package SL::DBUpgrade2;
3 use English qw(-no_match_vars);
5 use List::MoreUtils qw(any);
8 use SL::DBUpgrade2::Base;
16 return bless({}, $package)->init(@_);
20 my ($self, %params) = @_;
23 $params{path_suffix} = "-auth";
24 $params{schema} = "auth.";
27 $params{path_suffix} ||= '';
28 $params{schema} ||= '';
29 $params{path} ||= "sql/Pg-upgrade2" . $params{path_suffix};
31 map { $self->{$_} = $params{$_} } keys %params;
40 sub parse_dbupdate_controls {
43 my $form = $self->{form};
44 my $locale = $::locale;
49 my $path = $self->path;
51 foreach my $file_name (<$path/*.sql>, <$path/*.pl>) {
52 next unless (open(IN, "<:encoding(UTF-8)", $file_name));
54 my $file = $file_name;
65 next unless (/^(--|\#)\s*\@/);
70 my @fields = split(/\s*:\s*/, $_, 2);
71 next unless (scalar(@fields) == 2);
73 if ($fields[0] eq "depends") {
74 push(@{$control->{"depends"}}, split(/\s+/, $fields[1]));
75 } elsif ($fields[0] eq "locales") {
76 push @{$control->{locales}}, $fields[1];
78 $control->{$fields[0]} = $fields[1];
82 next if ($control->{ignore});
84 if (!$control->{"tag"}) {
85 _control_error($form, $file_name, $locale->text("Missing 'tag' field.")) ;
88 if ($control->{"tag"} =~ /[^a-zA-Z0-9_\(\)\-]/) {
89 _control_error($form, $file_name, $locale->text("The 'tag' field must only consist of alphanumeric characters or the carachters - _ ( )"))
92 if (defined($all_controls{$control->{"tag"}})) {
93 _control_error($form, $file_name, sprintf($locale->text("More than one control file with the tag '%s' exist."), $control->{"tag"}))
96 if (!$control->{"description"}) {
97 _control_error($form, $file_name, sprintf($locale->text("Missing 'description' field."))) ;
100 $control->{"priority"} *= 1;
101 $control->{"priority"} ||= 1000;
102 $control->{"file"} = $file;
104 delete @{$control}{qw(depth applied)};
106 $all_controls{$control->{"tag"}} = $control;
111 foreach my $control (values(%all_controls)) {
112 foreach my $dependency (@{$control->{"depends"}}) {
113 _control_error($form, $control->{"file"}, sprintf($locale->text("Unknown dependency '%s'."), $dependency)) if (!defined($all_controls{$dependency}));
116 map({ $_->{"loop"} = 0; } values(%all_controls));
117 _check_for_loops($form, $control->{"file"}, \%all_controls, $control->{"tag"});
120 map({ _dbupdate2_calculate_depth(\%all_controls, $_->{"tag"}) }
121 values(%all_controls));
123 $self->{all_controls} = \%all_controls;
129 $::lxdebug->enter_sub();
131 my ($self, $dbh, $filename, $version_or_control) = @_;
133 my $form = $self->{form};
134 my $fh = IO::File->new($filename, "<:encoding(UTF-8)");
140 return "No such file: $filename" if $self->{return_on_error};
141 $form->error("$filename : $!\n");
147 # Remove DOS and Unix style line endings.
153 for (my $i = 0; $i < length($_); $i++) {
154 my $char = substr($_, $i, 1);
156 # Are we inside a string?
158 if ($char eq $quote_chars[-1]) {
160 } elsif (length $quote_chars[-1] > 1
161 && substr($_, $i, length $quote_chars[-1]) eq $quote_chars[-1]) {
162 $i += length($quote_chars[-1]) - 1;
163 $char = $quote_chars[-1];
170 if (($char eq "'") || ($char eq "\"")) {
171 push(@quote_chars, $char);
173 } elsif ($char eq '$' # start of dollar quoting
174 && ($tag_end = index($_, '$', $i + 1)) > -1 # ends on same line
175 && (do { $tag = substr($_, $i + 1, $tag_end - $i - 1); 1 }) # extract tag
176 && $tag =~ /^ (?= [A-Za-z_] [A-Za-z0-9_]* | ) $/x) { # tag is identifier
177 push @quote_chars, $char = '$' . $tag . '$';
179 } elsif ($char eq ";") {
181 # Query is complete. Send it.
183 $sth = $dbh->prepare($query);
184 if (!$sth->execute()) {
185 my $errstr = $dbh->errstr;
186 return $errstr // '<unknown database error>' if $self->{return_on_error};
189 $form->dberror("The database update/creation did not succeed. " .
190 "The file ${filename} containing the following " .
191 "query failed:<br>${query}<br>" .
192 "The error message was: ${errstr}<br>" .
193 "All changes in that file have been reverted.");
205 # Insert a space at the end of each line so that queries split
206 # over multiple lines work properly.
208 $query .= @quote_chars ? "\n" : ' ';
212 if (ref($version_or_control) eq "HASH") {
213 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{"tag"}) . ", " . $dbh->quote($form->{"login"}) . ")");
214 } elsif ($version_or_control) {
215 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
221 $::lxdebug->leave_sub();
227 # Process a Perl script which updates the database.
228 # If the script returns 1 then the update was successful.
229 # Return code "2" means "needs more interaction; unlock
230 # the system and end current request".
231 # All other return codes are fatal errors.
232 sub process_perl_script {
233 $::lxdebug->enter_sub();
235 my ($self, $dbh, $filename, $version_or_control) = @_;
237 my %form_values = map { $_ => $::form->{$_} } qw(dbconnect dbdefault dbhost dbname dboptions dbpasswd dbport dbupdate dbuser login template_object version);
241 # setup dbup_ export vars & run script
242 my $old_dbh = $::form->set_standard_dbh($dbh);
243 my %dbup_myconfig = map { ($_ => $::form->{$_}) } qw(dbname dbuser dbpasswd dbhost dbport dbconnect);
245 SL::DBUpgrade2::Base::execute_script(
246 file_name => $filename,
247 tag => $version_or_control->{tag},
249 myconfig => \%dbup_myconfig,
253 my $error = $EVAL_ERROR;
255 $::form->set_standard_dbh($old_dbh);
257 $dbh->rollback if 1 != ($result // -1);
259 return $error if $self->{return_on_error} && (1 != ($result // -1));
261 if (!defined($result)) {
262 print $::form->parse_html_template("dbupgrade/error", { file => $filename, error => $error });
264 } elsif (1 != $result) {
265 SL::System::InstallationLock->unlock if 2 == $result;
269 if (ref($version_or_control) eq "HASH") {
270 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{tag}) . ", " . $dbh->quote($::form->{login}) . ")");
271 } elsif ($version_or_control) {
272 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
275 $dbh->commit if !$dbh->{AutoCommit} || $dbh->{BegunWork};
277 # Clear $::form of values that may have been set so that following
278 # Perl upgrade scripts won't have to work with old data (think of
279 # the usual 'continued' mechanism that's used for determining
280 # whether or not the upgrade form must be displayed).
281 delete @{ $::form }{ keys %{ $::form } };
282 $::form->{$_} = $form_values{$_} for keys %form_values;
284 $::lxdebug->leave_sub();
290 my ($self, $dbh, $filename, $version_or_control) = @_;
292 return $filename =~ m/sql$/ ? $self->process_query( $dbh, $filename, $version_or_control)
293 : $self->process_perl_script($dbh, $filename, $version_or_control);
296 sub unapplied_upgrade_scripts {
297 my ($self, $dbh) = @_;
299 my @all_scripts = map { $_->{applied} = 0; $_ } $self->sort_dbupdate_controls;
301 my $query = qq|SELECT tag FROM | . $self->{schema} . qq|schema_info|;
302 my $sth = $dbh->prepare($query);
303 $sth->execute || $self->{form}->dberror($query);
304 while (my ($tag) = $sth->fetchrow_array()) {
305 $self->{all_controls}->{$tag}->{applied} = 1 if defined $self->{all_controls}->{$tag};
309 return grep { !$_->{applied} } @all_scripts;
312 sub update2_available {
313 my ($self, $dbh) = @_;
315 my @unapplied_scripts = $self->unapplied_upgrade_scripts($dbh);
317 return !!@unapplied_scripts;
320 sub apply_admin_dbupgrade_scripts {
321 my ($self, $called_from_admin) = @_;
323 return 0 if !$self->{auth};
325 my $dbh = $::auth->dbconnect;
326 my @unapplied_scripts = $self->unapplied_upgrade_scripts($dbh);
328 return 0 if !@unapplied_scripts;
330 $self->{form}->{login} ||= 'admin';
332 if ($called_from_admin) {
333 $self->{form}->{title} = $::locale->text('Dataset upgrade');
334 $self->{form}->header;
337 print $self->{form}->parse_html_template("dbupgrade/header", { dbname => $::auth->{DB_config}->{db} });
339 foreach my $control (@unapplied_scripts) {
340 $::lxdebug->message(LXDebug->DEBUG2(), "Applying Update $control->{file}");
341 print $self->{form}->parse_html_template("dbupgrade/upgrade_message2", $control);
343 $self->process_file($dbh, "sql/Pg-upgrade2-auth/$control->{file}", $control);
346 print $self->{form}->parse_html_template("dbupgrade/footer", { is_admin => 1 }) if $called_from_admin;
351 sub _check_for_loops {
352 my ($form, $file_name, $controls, $tag, @path) = @_;
356 my $ctrl = $controls->{$tag};
358 if ($ctrl->{"loop"} == 1) {
360 _control_error($form, $file_name, $::locale->text("Dependency loop detected:") . " " . join(" -> ", @path))
362 } elsif ($ctrl->{"loop"} == 0) {
365 map({ _check_for_loops($form, $file_name, $controls, $_, @path); } @{ $ctrl->{"depends"} });
371 my ($form, $file_name, $message) = @_;
374 my $locale = $::locale;
376 $form->error(sprintf($locale->text("Error in database control file '%s': %s"), $file_name, $message));
379 sub _dbupdate2_calculate_depth {
380 my ($tree, $tag) = @_;
382 my $node = $tree->{$tag};
384 return if (defined($node->{"depth"}));
388 foreach $tag (@{$node->{"depends"}}) {
389 _dbupdate2_calculate_depth($tree, $tag);
390 my $value = $tree->{$tag}->{"depth"};
391 $max_depth = $value if ($value > $max_depth);
394 $node->{"depth"} = $max_depth + 1;
397 sub sort_dbupdate_controls {
400 $self->parse_dbupdate_controls unless $self->{all_controls};
402 return sort { ($a->{depth} <=> $b->{depth}) || ($a->{priority} <=> $b->{priority}) || ($a->{tag} cmp $b->{tag}) } values %{ $self->{all_controls} };
414 SL::DBUpgrade2 - Parse database upgrade files stored in
415 C<sql/Pg-upgrade2> and C<sql/Pg-upgrade2-auth>
422 # Apply outstanding updates to the authentication database
423 my $scripts = SL::DBUpgrade2->new(
427 $scripts->apply_admin_dbupgrade_scripts(1);
429 # Apply updates to a user database
430 my $scripts = SL::DBUpgrade2->new(
434 User->dbupdate2(form => $form,
435 updater => $scripts->parse_dbupdate_controls,
436 database => $dbname);
440 Database upgrade files are used to upgrade the database structure and
441 content of both the authentication database and the user
442 databases. They're applied when a user logs in. As long as the
443 authentication database is not up to date users cannot log in in
444 general, and the admin has to log in first in order to get his
447 Database scripts form a tree by specifying which upgrade file depends
448 on which other upgrade file. This means that such files are always
449 applied in a well-defined order.
451 Each script is run in a separate transaction. If a script fails the
452 current transaction is rolled back and the whole upgrade process is
453 stopped. The user/admin is required to fix the issue manually.
455 A list of applied upgrade scripts is maintained in a table called
456 C<schema_info> for the user database and C<auth.schema_info>) for the
457 authentication database. They contain the tags, the login name of the
458 user having applied the script and the timestamp when the script was
461 Database upgrade files come in two flavours: SQL files and Perl
462 files. For both there are control fields that determine the order in
463 which they're executed etc. The control fields are tag/value pairs
464 contained in comments.
466 =head1 CONTROL FIELDS
470 Control fields for Perl files:
473 # @tag2: some more values
478 Control fields for SQL files:
481 -- @tag2: some more values
484 =head2 TAGS AND THEIR MEANING
486 The following tags are recognized:
492 The name for this file. The C<tag> is also used for dependency
493 resolution (see C<depends>).
499 A description presented to the user when the update is applied.
505 A space-separated list of tags of scripts this particular script
506 depends on. All other upgrades listed in C<depends> will be applied
507 before the current one is applied.
511 Ordering the scripts by their dependencies alone produces a lot of
512 groups of scripts that could be applied at the same time (e.g. if both
513 B and C depend only on A then B could be applied before C or the other
514 way around). This field determines the order inside such a
515 group. Scripts with lower priority fields are executed before scripts
516 with higher priority fields.
518 If two scripts have equal priorities then their tag name decides.
520 The priority defaults to 1000.
528 =item C<apply_admin_dbupgrade_scripts $called_from_admin>
530 Applies all unapplied upgrade files to the authentication/admin
531 database. The parameter C<$called_from_admin> should be truish if the
532 function is called from the web interface and falsish if it's called
533 from e.g. a command line script like C<scripts/dbupgrade2_tool.pl>.
535 =item C<init %params>
537 Initializes the object. Is called directly from L<new> and should not
542 Creates a new object. Possible parameters are:
548 Path to the upgrade files to parse. Required.
552 C<SL::Form> object to use. Required.
556 Optional parameter defaulting to 0. If trueish then the scripts read
557 are the ones applying to the authentication database.
561 =item C<parse_dbupdate_controls>
563 Parses all files located in C<path> (see L<new>), ananlyzes their
564 control fields, builds the tree, and signals errors if control fields
565 are missing/wrong (e.g. a tag name listed in C<depends> is not
566 found). Sets C<$Self->{all_controls}> to the list of database
569 =item C<process_file $dbh, $filename, $version_or_control>
571 Applies a single database upgrade file. Calls L<process_perl_script>
572 for Perl update files and C<process_query> for SQL update
573 files. Requires an open database handle(C<$dbh>), the file name
574 (C<$filename>) and a hash structure of the file's control fields as
575 produced by L<parse_dbupdate_controls> (C<$version_or_control>).
577 Returns the result of the actual function called.
579 =item C<process_perl_script $dbh, $filename, $version_or_control>
581 Applies a single Perl database upgrade file. Requires an open database
582 handle(C<$dbh>), the file name (C<$filename>) and a hash structure of
583 the file's control fields as produced by L<parse_dbupdate_controls>
584 (C<$version_or_control>).
586 Perl scripts are executed via L<eval>. If L<eval> returns falsish then
587 an error is expected. There are two special return values: If the
588 script returns C<1> then the update was successful. Return code C<2>
589 means "needs more interaction from the user; unlock the system and
590 end current upgrade process". All other return codes are fatal errors.
592 Inside the Perl script several local variables exist that can be used:
598 A locale object for translating messages
602 The database handle (inside a transaction).
606 The global C<SL::Form> object.
610 A Perl script can actually implement queries that fail while
611 continueing the process by handling the transaction itself, e.g. with
612 the following function:
615 my ($query, $may_fail) = @_;
617 if (!$dbh->do($query)) {
618 die($dbup_locale->text("Database update error:") . "<br>$msg<br>" . $DBI::errstr) unless $may_fail;
624 =item C<process_query $dbh, $filename, $version_or_control>
626 Applies a single SQL database upgrade file. Requires an open database
627 handle(C<$dbh>), the file name (C<$filename>), and a hash structure of
628 the file's control fields as produced by L<parse_dbupdate_controls>
629 (C<$version_or_control>).
631 =item C<sort_dbupdate_controls>
633 Sorts the database upgrade scripts according to their C<tag> and
634 C<priority> control fields. Returns a list of their hash
635 representations that can be applied in order.
637 =item C<unapplied_upgrade_scripts $dbh>
639 Returns a list if upgrade scripts (their internal hash representation)
640 that haven't been applied to a database yet. C<$dbh> is an open handle
641 to the database that is checked.
643 Requires that the scripts have been parsed.
645 =item C<update2_available $dbh>
647 Returns trueish if at least one upgrade script hasn't been applied to
648 a database yet. C<$dbh> is an open handle to the database that is
651 Requires that the scripts have been parsed.
661 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>