1 package SL::DBUpgrade2;
3 use English qw(-no_match_vars);
5 use List::MoreUtils qw(any);
8 use SL::DBUpgrade2::Base;
17 return bless({}, $package)->init(@_);
21 my ($self, %params) = @_;
24 $params{path_suffix} = "-auth";
25 $params{schema} = "auth.";
28 $params{path_suffix} ||= '';
29 $params{schema} ||= '';
30 $params{path} = "sql/Pg-upgrade2" . $params{path_suffix};
32 map { $self->{$_} = $params{$_} } keys %params;
41 sub parse_dbupdate_controls {
42 $::lxdebug->enter_sub();
46 my $form = $self->{form};
47 my $locale = $::locale;
52 my $path = $self->path;
54 foreach my $file_name (<$path/*.sql>, <$path/*.pl>) {
55 next unless (open(IN, $file_name));
57 my $file = $file_name;
67 next unless (/^(--|\#)\s*\@/);
72 my @fields = split(/\s*:\s*/, $_, 2);
73 next unless (scalar(@fields) == 2);
75 if ($fields[0] eq "depends") {
76 push(@{$control->{"depends"}}, split(/\s+/, $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;
125 $::lxdebug->leave_sub();
131 $::lxdebug->enter_sub();
133 my ($self, $dbh, $filename, $version_or_control) = @_;
135 my $form = $self->{form};
136 my $fh = IO::File->new($filename, "r");
142 return "No such file: $filename" if $self->{return_on_error};
143 $form->error("$filename : $!\n");
149 $_ = SL::Iconv::convert('UTF-8', 'UTF-8', $_);
151 # Remove DOS and Unix style line endings.
157 for (my $i = 0; $i < length($_); $i++) {
158 my $char = substr($_, $i, 1);
160 # Are we inside a string?
162 if ($char eq $quote_chars[-1]) {
164 } elsif (length $quote_chars[-1] > 1
165 && substr($_, $i, length $quote_chars[-1]) eq $quote_chars[-1]) {
166 $i += length($quote_chars[-1]) - 1;
167 $char = $quote_chars[-1];
174 if (($char eq "'") || ($char eq "\"")) {
175 push(@quote_chars, $char);
177 } elsif ($char eq '$' # start of dollar quoting
178 && ($tag_end = index($_, '$', $i + 1)) > -1 # ends on same line
179 && (do { $tag = substr($_, $i + 1, $tag_end - $i - 1); 1 }) # extract tag
180 && $tag =~ /^ (?= [A-Za-z_] [A-Za-z0-9_]* | ) $/x) { # tag is identifier
181 push @quote_chars, $char = '$' . $tag . '$';
183 } elsif ($char eq ";") {
185 # Query is complete. Send it.
187 $sth = $dbh->prepare($query);
188 if (!$sth->execute()) {
189 my $errstr = $dbh->errstr;
190 return $errstr // '<unknown database error>' if $self->{return_on_error};
193 $form->dberror("The database update/creation did not succeed. " .
194 "The file ${filename} containing the following " .
195 "query failed:<br>${query}<br>" .
196 "The error message was: ${errstr}<br>" .
197 "All changes in that file have been reverted.");
209 # Insert a space at the end of each line so that queries split
210 # over multiple lines work properly.
212 $query .= @quote_chars ? "\n" : ' ';
216 if (ref($version_or_control) eq "HASH") {
217 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{"tag"}) . ", " . $dbh->quote($form->{"login"}) . ")");
218 } elsif ($version_or_control) {
219 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
225 $::lxdebug->leave_sub();
231 # Process a Perl script which updates the database.
232 # If the script returns 1 then the update was successful.
233 # Return code "2" means "needs more interaction; unlock
234 # the system and end current request".
235 # All other return codes are fatal errors.
236 sub process_perl_script {
237 $::lxdebug->enter_sub();
239 my ($self, $dbh, $filename, $version_or_control) = @_;
241 my %form_values = map { $_ => $::form->{$_} } qw(dbconnect dbdefault dbhost dbname dboptions dbpasswd dbport dbupdate dbuser login template_object version);
245 # setup dbup_ export vars & run script
246 my $old_dbh = $::form->set_standard_dbh($dbh);
247 my %dbup_myconfig = map { ($_ => $::form->{$_}) } qw(dbname dbuser dbpasswd dbhost dbport dbconnect);
249 SL::DBUpgrade2::Base::execute_script(
250 file_name => $filename,
251 tag => $version_or_control->{tag},
253 myconfig => \%dbup_myconfig,
257 my $error = $EVAL_ERROR;
259 $::form->set_standard_dbh($old_dbh);
261 $dbh->rollback if 1 != ($result // -1);
263 return $error if $self->{return_on_error} && (1 != ($result // -1));
265 if (!defined($result)) {
266 print $::form->parse_html_template("dbupgrade/error", { file => $filename, error => $error });
268 } elsif (1 != $result) {
269 SL::System::InstallationLock->unlock if 2 == $result;
273 if (ref($version_or_control) eq "HASH") {
274 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{tag}) . ", " . $dbh->quote($::form->{login}) . ")");
275 } elsif ($version_or_control) {
276 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
279 $dbh->commit if !$dbh->{AutoCommit} || $dbh->{BegunWork};
281 # Clear $::form of values that may have been set so that following
282 # Perl upgrade scripts won't have to work with old data (think of
283 # the usual 'continued' mechanism that's used for determining
284 # whether or not the upgrade form must be displayed).
285 delete @{ $::form }{ keys %{ $::form } };
286 $::form->{$_} = $form_values{$_} for keys %form_values;
288 $::lxdebug->leave_sub();
294 my ($self, $dbh, $filename, $version_or_control) = @_;
296 return $filename =~ m/sql$/ ? $self->process_query( $dbh, $filename, $version_or_control)
297 : $self->process_perl_script($dbh, $filename, $version_or_control);
300 sub update2_available {
301 $::lxdebug->enter_sub();
303 my ($self, $dbh) = @_;
305 map { $_->{applied} = 0; } values %{ $self->{all_controls} };
307 my $sth = $dbh->prepare(qq|SELECT tag FROM | . $self->{schema} . qq|schema_info|);
309 while (my ($tag) = $sth->fetchrow_array) {
310 $self->{all_controls}->{$tag}->{applied} = 1 if defined $self->{all_controls}->{$tag};
315 my $needs_update = any { !$_->{applied} } values %{ $self->{all_controls} };
317 $::lxdebug->leave_sub();
319 return $needs_update;
322 sub unapplied_upgrade_scripts {
323 my ($self, $dbh) = @_;
325 my @all_scripts = map { $_->{applied} = 0; $_ } $self->sort_dbupdate_controls;
327 my $query = qq|SELECT tag FROM | . $self->{schema} . qq|schema_info|;
328 my $sth = $dbh->prepare($query);
329 $sth->execute || $self->{form}->dberror($query);
330 while (my ($tag) = $sth->fetchrow_array()) {
331 $self->{all_controls}->{$tag}->{applied} = 1 if defined $self->{all_controls}->{$tag};
335 return grep { !$_->{applied} } @all_scripts;
338 sub apply_admin_dbupgrade_scripts {
339 my ($self, $called_from_admin) = @_;
341 return 0 if !$self->{auth};
343 my $dbh = $::auth->dbconnect;
344 my @unapplied_scripts = $self->unapplied_upgrade_scripts($dbh);
346 return 0 if !@unapplied_scripts;
348 $self->{form}->{login} ||= 'admin';
350 map { $_->{description} = SL::Iconv::convert('UTF-8', 'UTF-8', $_->{description}) } values %{ $self->{all_controls} };
352 if ($called_from_admin) {
353 $self->{form}->{title} = $::locale->text('Dataset upgrade');
354 $self->{form}->header;
357 print $self->{form}->parse_html_template("dbupgrade/header", { dbname => $::auth->{DB_config}->{db} });
359 foreach my $control (@unapplied_scripts) {
360 $::lxdebug->message(LXDebug->DEBUG2(), "Applying Update $control->{file}");
361 print $self->{form}->parse_html_template("dbupgrade/upgrade_message2", $control);
363 $self->process_file($dbh, "sql/Pg-upgrade2-auth/$control->{file}", $control);
366 print $self->{form}->parse_html_template("dbupgrade/footer", { is_admin => 1 }) if $called_from_admin;
371 sub _check_for_loops {
372 my ($form, $file_name, $controls, $tag, @path) = @_;
376 my $ctrl = $controls->{$tag};
378 if ($ctrl->{"loop"} == 1) {
380 _control_error($form, $file_name, $::locale->text("Dependency loop detected:") . " " . join(" -> ", @path))
382 } elsif ($ctrl->{"loop"} == 0) {
385 map({ _check_for_loops($form, $file_name, $controls, $_, @path); } @{ $ctrl->{"depends"} });
391 my ($form, $file_name, $message) = @_;
394 my $locale = $::locale;
396 $form->error(sprintf($locale->text("Error in database control file '%s': %s"), $file_name, $message));
399 sub _dbupdate2_calculate_depth {
400 $::lxdebug->enter_sub(2);
402 my ($tree, $tag) = @_;
404 my $node = $tree->{$tag};
406 return $::lxdebug->leave_sub(2) if (defined($node->{"depth"}));
410 foreach $tag (@{$node->{"depends"}}) {
411 _dbupdate2_calculate_depth($tree, $tag);
412 my $value = $tree->{$tag}->{"depth"};
413 $max_depth = $value if ($value > $max_depth);
416 $node->{"depth"} = $max_depth + 1;
418 $::lxdebug->leave_sub(2);
421 sub sort_dbupdate_controls {
424 $self->parse_dbupdate_controls unless $self->{all_controls};
426 return sort { ($a->{depth} <=> $b->{depth}) || ($a->{priority} <=> $b->{priority}) || ($a->{tag} cmp $b->{tag}) } values %{ $self->{all_controls} };
438 SL::DBUpgrade2 - Parse database upgrade files stored in
439 C<sql/Pg-upgrade2> and C<sql/Pg-upgrade2-auth>
446 # Apply outstanding updates to the authentication database
447 my $scripts = SL::DBUpgrade2->new(
451 $scripts->apply_admin_dbupgrade_scripts(1);
453 # Apply updates to a user database
454 my $scripts = SL::DBUpgrade2->new(
458 User->dbupdate2(form => $form,
459 updater => $scripts->parse_dbupdate_controls,
460 database => $dbname);
464 Database upgrade files are used to upgrade the database structure and
465 content of both the authentication database and the user
466 databases. They're applied when a user logs in. As long as the
467 authentication database is not up to date users cannot log in in
468 general, and the admin has to log in first in order to get his
471 Database scripts form a tree by specifying which upgrade file depends
472 on which other upgrade file. This means that such files are always
473 applied in a well-defined order.
475 Each script is run in a separate transaction. If a script fails the
476 current transaction is rolled back and the whole upgrade process is
477 stopped. The user/admin is required to fix the issue manually.
479 A list of applied upgrade scripts is maintained in a table called
480 C<schema_info> for the user database and C<auth.schema_info>) for the
481 authentication database. They contain the tags, the login name of the
482 user having applied the script and the timestamp when the script was
485 Database upgrade files come in two flavours: SQL files and Perl
486 files. For both there are control fields that determine the order in
487 which they're executed etc. The control fields are tag/value pairs
488 contained in comments.
490 =head1 CONTROL FIELDS
494 Control fields for Perl files:
497 # @tag2: some more values
502 Control fields for SQL files:
505 -- @tag2: some more values
508 =head2 TAGS AND THEIR MEANING
510 The following tags are recognized:
516 The name for this file. The C<tag> is also used for dependency
517 resolution (see C<depends>).
523 A description presented to the user when the update is applied.
529 A space-separated list of tags of scripts this particular script
530 depends on. All other upgrades listed in C<depends> will be applied
531 before the current one is applied.
535 Ordering the scripts by their dependencies alone produces a lot of
536 groups of scripts that could be applied at the same time (e.g. if both
537 B and C depend only on A then B could be applied before C or the other
538 way around). This field determines the order inside such a
539 group. Scripts with lower priority fields are executed before scripts
540 with higher priority fields.
542 If two scripts have equal priorities then their tag name decides.
544 The priority defaults to 1000.
552 =item C<apply_admin_dbupgrade_scripts $called_from_admin>
554 Applies all unapplied upgrade files to the authentication/admin
555 database. The parameter C<$called_from_admin> should be truish if the
556 function is called from the web interface and falsish if it's called
557 from e.g. a command line script like C<scripts/dbupgrade2_tool.pl>.
559 =item C<init %params>
561 Initializes the object. Is called directly from L<new> and should not
566 Creates a new object. Possible parameters are:
572 Path to the upgrade files to parse. Required.
576 C<SL::Form> object to use. Required.
580 Optional parameter defaulting to 0. If trueish then the scripts read
581 are the ones applying to the authentication database.
585 =item C<parse_dbupdate_controls>
587 Parses all files located in C<path> (see L<new>), ananlyzes their
588 control fields, builds the tree, and signals errors if control fields
589 are missing/wrong (e.g. a tag name listed in C<depends> is not
590 found). Sets C<$Self->{all_controls}> to the list of database
593 =item C<process_file $dbh, $filename, $version_or_control>
595 Applies a single database upgrade file. Calls L<process_perl_script>
596 for Perl update files and C<process_query> for SQL update
597 files. Requires an open database handle(C<$dbh>), the file name
598 (C<$filename>) and a hash structure of the file's control fields as
599 produced by L<parse_dbupdate_controls> (C<$version_or_control>).
601 Returns the result of the actual function called.
603 =item C<process_perl_script $dbh, $filename, $version_or_control>
605 Applies a single Perl database upgrade file. Requires an open database
606 handle(C<$dbh>), the file name (C<$filename>) and a hash structure of
607 the file's control fields as produced by L<parse_dbupdate_controls>
608 (C<$version_or_control>).
610 Perl scripts are executed via L<eval>. If L<eval> returns falsish then
611 an error is expected. There are two special return values: If the
612 script returns C<1> then the update was successful. Return code C<2>
613 means "needs more interaction from the user; unlock the system and
614 end current upgrade process". All other return codes are fatal errors.
616 Inside the Perl script several local variables exist that can be used:
622 A locale object for translating messages
626 The database handle (inside a transaction).
630 The global C<SL::Form> object.
634 A Perl script can actually implement queries that fail while
635 continueing the process by handling the transaction itself, e.g. with
636 the following function:
639 my ($query, $may_fail) = @_;
641 if (!$dbh->do($query)) {
642 die($dbup_locale->text("Database update error:") . "<br>$msg<br>" . $DBI::errstr) unless $may_fail;
648 =item C<process_query $dbh, $filename, $version_or_control>
650 Applies a single SQL database upgrade file. Requires an open database
651 handle(C<$dbh>), the file name (C<$filename>), and a hash structure of
652 the file's control fields as produced by L<parse_dbupdate_controls>
653 (C<$version_or_control>).
655 =item C<sort_dbupdate_controls>
657 Sorts the database upgrade scripts according to their C<tag> and
658 C<priority> control fields. Returns a list of their hash
659 representations that can be applied in order.
661 =item C<unapplied_upgrade_scripts $dbh>
663 Returns a list if upgrade scripts (their internal hash representation)
664 that haven't been applied to a database yet. C<$dbh> is an open handle
665 to the database that is checked.
667 Requires that the scripts have been parsed.
669 =item C<update2_available $dbh>
671 Returns trueish if at least one upgrade script hasn't been applied to
672 a database yet. C<$dbh> is an open handle to the database that is
675 Requires that the scripts have been parsed.
685 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>