1 package SL::DBUpgrade2;
3 use English qw(-no_match_vars);
5 use List::MoreUtils qw(any);
8 use SL::DBUpgrade2::Base;
10 use SL::System::Process;
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} ||= SL::System::Process->exe_dir . "/sql/Pg-upgrade2" . $params{path_suffix};
32 map { $self->{$_} = $params{$_} } keys %params;
41 sub parse_dbupdate_controls {
44 my $form = $self->{form};
45 my $locale = $::locale;
50 my $path = $self->path;
52 foreach my $file_name (<$path/*.sql>, <$path/*.pl>) {
53 next unless (open(IN, "<:encoding(UTF-8)", $file_name));
55 my $file = $file_name;
66 next unless (/^(--|\#)\s*\@/);
71 my @fields = split(/\s*:\s*/, $_, 2);
72 next unless (scalar(@fields) == 2);
74 if ($fields[0] eq "depends") {
75 push(@{$control->{"depends"}}, split(/\s+/, $fields[1]));
76 } elsif ($fields[0] eq "locales") {
77 push @{$control->{locales}}, $fields[1];
79 $control->{$fields[0]} = $fields[1];
83 next if ($control->{ignore});
85 if (!$control->{"tag"}) {
86 _control_error($form, $file_name, $locale->text("Missing 'tag' field.")) ;
89 if ($control->{"tag"} =~ /[^a-zA-Z0-9_\(\)\-]/) {
90 _control_error($form, $file_name, $locale->text("The 'tag' field must only consist of alphanumeric characters or the carachters - _ ( )"))
93 if (defined($all_controls{$control->{"tag"}})) {
94 _control_error($form, $file_name, sprintf($locale->text("More than one control file with the tag '%s' exist."), $control->{"tag"}))
97 if (!$control->{"description"}) {
98 _control_error($form, $file_name, sprintf($locale->text("Missing 'description' field."))) ;
101 delete @{$control}{qw(depth applied)};
103 my @unknown_keys = grep { !m{^ (?: depends | description | file | ignore | locales | may_fail | priority | superuser_privileges | tag ) $}x } keys %{ $control };
105 _control_error($form, $file_name, sprintf($locale->text("Unknown control fields: #1", join(' ', sort({ lc $a cmp lc $b } @unknown_keys)))));
108 $control->{"priority"} *= 1;
109 $control->{"priority"} ||= 1000;
110 $control->{"file"} = $file;
112 $all_controls{$control->{"tag"}} = $control;
117 foreach my $control (values(%all_controls)) {
118 foreach my $dependency (@{$control->{"depends"}}) {
119 _control_error($form, $control->{"file"}, sprintf($locale->text("Unknown dependency '%s'."), $dependency)) if (!defined($all_controls{$dependency}));
122 map({ $_->{"loop"} = 0; } values(%all_controls));
123 _check_for_loops($form, $control->{"file"}, \%all_controls, $control->{"tag"});
126 map({ _dbupdate2_calculate_depth(\%all_controls, $_->{"tag"}) }
127 values(%all_controls));
129 $self->{all_controls} = \%all_controls;
135 $::lxdebug->enter_sub();
137 my ($self, $dbh, $filename, $version_or_control) = @_;
139 my $form = $self->{form};
140 my $fh = IO::File->new($filename, "<:encoding(UTF-8)");
146 return "No such file: $filename" if $self->{return_on_error};
147 $form->error("$filename : $!\n");
153 # Remove DOS and Unix style line endings.
156 for (my $i = 0; $i < length($_); $i++) {
157 my $char = substr($_, $i, 1);
159 # Are we inside a string?
161 if ($char eq $quote_chars[-1]) {
163 } elsif (length $quote_chars[-1] > 1
164 && substr($_, $i, length $quote_chars[-1]) eq $quote_chars[-1]) {
165 $i += length($quote_chars[-1]) - 1;
166 $char = $quote_chars[-1];
173 if (($char eq "'") || ($char eq "\"")) {
174 push(@quote_chars, $char);
176 } elsif ($char eq '$' # start of dollar quoting
177 && ($tag_end = index($_, '$', $i + 1)) > -1 # ends on same line
178 && (do { $tag = substr($_, $i + 1, $tag_end - $i - 1); 1 }) # extract tag
179 && $tag =~ /^ (?= [A-Za-z_] [A-Za-z0-9_]* | ) $/x) { # tag is identifier
180 push @quote_chars, $char = '$' . $tag . '$';
182 } elsif ($char eq "-") {
183 if ( substr($_, $i+1, 1) eq "-") {
184 # found a comment outside quote
187 } elsif ($char eq ";") {
189 # Query is complete. Send it.
191 $sth = $dbh->prepare($query);
192 if (!$sth->execute()) {
193 my $errstr = $dbh->errstr;
194 return $errstr // '<unknown database error>' if $self->{return_on_error};
197 if (!ref $version_or_control || ref $version_or_control ne 'HASH' || !$version_or_control->{may_fail}) {
198 $form->dberror("The database update/creation did not succeed. " .
199 "The file ${filename} containing the following " .
200 "query failed:<br>${query}<br>" .
201 "The error message was: ${errstr}<br>" .
202 "All changes in that file have been reverted.")
215 # Insert a space at the end of each line so that queries split
216 # over multiple lines work properly.
218 $query .= @quote_chars ? "\n" : ' ';
222 if (ref($version_or_control) eq "HASH") {
223 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{"tag"}) . ", " . $dbh->quote($form->{"login"}) . ")");
224 } elsif ($version_or_control) {
225 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
231 $::lxdebug->leave_sub();
237 # Process a Perl script which updates the database.
238 # If the script returns 1 then the update was successful.
239 # Return code "2" means "needs more interaction; unlock
240 # the system and end current request".
241 # All other return codes are fatal errors.
242 sub process_perl_script {
243 $::lxdebug->enter_sub();
245 my ($self, $dbh, $filename, $version_or_control) = @_;
247 my %form_values = %$::form;
251 # setup dbup_ export vars & run script
252 my %dbup_myconfig = map { ($_ => $::form->{$_}) } qw(dbname dbuser dbpasswd dbhost dbport dbconnect);
254 SL::DBUpgrade2::Base::execute_script(
255 file_name => $filename,
256 tag => $version_or_control->{tag},
258 myconfig => \%dbup_myconfig,
262 my $error = $EVAL_ERROR;
264 $dbh->rollback if 1 != ($result // -1);
266 return $error if $self->{return_on_error} && (1 != ($result // -1));
268 if (!defined($result)) {
269 print $::form->parse_html_template("dbupgrade/error", { file => $filename, error => $error });
270 $::dispatcher->end_request;
271 } elsif (1 != $result) {
272 SL::System::InstallationLock->unlock if 2 == $result;
273 $::dispatcher->end_request;
276 if (ref($version_or_control) eq "HASH") {
277 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{tag}) . ", " . $dbh->quote($::form->{login}) . ")");
278 } elsif ($version_or_control) {
279 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
282 $dbh->commit if !$dbh->{AutoCommit} || $dbh->{BegunWork};
284 # Clear $::form of values that may have been set so that following
285 # Perl upgrade scripts won't have to work with old data (think of
286 # the usual 'continued' mechanism that's used for determining
287 # whether or not the upgrade form must be displayed).
288 delete @{ $::form }{ keys %{ $::form } };
289 $::form->{$_} = $form_values{$_} for keys %form_values;
291 $::lxdebug->leave_sub();
297 my ($self, $dbh, $filename, $version_or_control) = @_;
299 my $result = $filename =~ m/sql$/ ? $self->process_query( $dbh, $filename, $version_or_control)
300 : $self->process_perl_script($dbh, $filename, $version_or_control);
302 $::lxdebug->log_time("DB upgrade script '${filename}' finished");
307 sub unapplied_upgrade_scripts {
308 my ($self, $dbh) = @_;
310 my @all_scripts = map { $_->{applied} = 0; $_ } $self->sort_dbupdate_controls;
312 my $query = qq|SELECT tag FROM | . $self->{schema} . qq|schema_info|;
313 my $sth = $dbh->prepare($query);
314 $sth->execute || $self->{form}->dberror($query);
315 while (my ($tag) = $sth->fetchrow_array()) {
316 $self->{all_controls}->{$tag}->{applied} = 1 if defined $self->{all_controls}->{$tag};
320 return grep { !$_->{applied} } @all_scripts;
323 sub apply_admin_dbupgrade_scripts {
324 my ($self, $called_from_admin) = @_;
326 return 0 if !$self->{auth};
328 my $dbh = $::auth->dbconnect;
329 my @unapplied_scripts = $self->unapplied_upgrade_scripts($dbh);
331 return 0 if !@unapplied_scripts;
333 $self->{form}->{login} ||= 'admin';
335 if ($called_from_admin) {
336 $self->{form}->{title} = $::locale->text('Dataset upgrade');
337 $self->{form}->header;
340 print $self->{form}->parse_html_template("dbupgrade/header", { dbname => $::auth->{DB_config}->{db} });
342 $::lxdebug->log_time("DB upgrades commencing");
344 foreach my $control (@unapplied_scripts) {
345 $::lxdebug->message(LXDebug->DEBUG2(), "Applying Update $control->{file}");
346 print $self->{form}->parse_html_template("dbupgrade/upgrade_message2", $control);
348 $self->process_file($dbh, "sql/Pg-upgrade2-auth/$control->{file}", $control);
351 $::lxdebug->log_time("DB upgrades finished");
353 print $self->{form}->parse_html_template("dbupgrade/footer", { is_admin => 1 }) if $called_from_admin;
358 sub _check_for_loops {
359 my ($form, $file_name, $controls, $tag, @path) = @_;
363 my $ctrl = $controls->{$tag};
365 if ($ctrl->{"loop"} == 1) {
367 _control_error($form, $file_name, $::locale->text("Dependency loop detected:") . " " . join(" -> ", @path))
369 } elsif ($ctrl->{"loop"} == 0) {
372 map({ _check_for_loops($form, $file_name, $controls, $_, @path); } @{ $ctrl->{"depends"} });
378 my ($form, $file_name, $message) = @_;
381 my $locale = $::locale;
383 $form->error(sprintf($locale->text("Error in database control file '%s': %s"), $file_name, $message));
386 sub _dbupdate2_calculate_depth {
387 my ($tree, $tag) = @_;
389 my $node = $tree->{$tag};
391 return if (defined($node->{"depth"}));
395 foreach $tag (@{$node->{"depends"}}) {
396 _dbupdate2_calculate_depth($tree, $tag);
397 my $value = $tree->{$tag}->{"depth"};
398 $max_depth = $value if ($value > $max_depth);
401 $node->{"depth"} = $max_depth + 1;
404 sub sort_dbupdate_controls {
407 $self->parse_dbupdate_controls unless $self->{all_controls};
409 return sort { ($a->{depth} <=> $b->{depth}) || ($a->{priority} <=> $b->{priority}) || ($a->{tag} cmp $b->{tag}) } values %{ $self->{all_controls} };
421 SL::DBUpgrade2 - Parse database upgrade files stored in
422 C<sql/Pg-upgrade2> and C<sql/Pg-upgrade2-auth>
429 # Apply outstanding updates to the authentication database
430 my $scripts = SL::DBUpgrade2->new(
434 $scripts->apply_admin_dbupgrade_scripts(1);
436 # Apply updates to a user database
437 my $scripts = SL::DBUpgrade2->new(
441 User->dbupdate2(form => $form,
442 updater => $scripts->parse_dbupdate_controls,
443 database => $dbname);
447 Database upgrade files are used to upgrade the database structure and
448 content of both the authentication database and the user
449 databases. They're applied when a user logs in. As long as the
450 authentication database is not up to date users cannot log in in
451 general, and the admin has to log in first in order to get his
454 Database scripts form a tree by specifying which upgrade file depends
455 on which other upgrade file. This means that such files are always
456 applied in a well-defined order.
458 Each script is run in a separate transaction. If a script fails the
459 current transaction is rolled back and the whole upgrade process is
460 stopped. The user/admin is required to fix the issue manually.
462 A list of applied upgrade scripts is maintained in a table called
463 C<schema_info> for the user database and C<auth.schema_info>) for the
464 authentication database. They contain the tags, the login name of the
465 user having applied the script and the timestamp when the script was
468 Database upgrade files come in two flavours: SQL files and Perl
469 files. For both there are control fields that determine the order in
470 which they're executed etc. The control fields are tag/value pairs
471 contained in comments.
473 =head1 CONTROL FIELDS
477 Control fields for Perl files:
480 # @tag2: some more values
485 Control fields for SQL files:
488 -- @tag2: some more values
491 =head2 TAGS AND THEIR MEANING
493 The following tags are recognized:
499 The name for this file. The C<tag> is also used for dependency
500 resolution (see C<depends>).
506 A description presented to the user when the update is applied.
512 A space-separated list of tags of scripts this particular script
513 depends on. All other upgrades listed in C<depends> will be applied
514 before the current one is applied.
518 Ordering the scripts by their dependencies alone produces a lot of
519 groups of scripts that could be applied at the same time (e.g. if both
520 B and C depend only on A then B could be applied before C or the other
521 way around). This field determines the order inside such a
522 group. Scripts with lower priority fields are executed before scripts
523 with higher priority fields.
525 If two scripts have equal priorities then their tag name decides.
527 The priority defaults to 1000.
535 =item C<apply_admin_dbupgrade_scripts $called_from_admin>
537 Applies all unapplied upgrade files to the authentication/admin
538 database. The parameter C<$called_from_admin> should be truish if the
539 function is called from the web interface and falsish if it's called
540 from e.g. a command line script like C<scripts/dbupgrade2_tool.pl>.
542 =item C<init %params>
544 Initializes the object. Is called directly from L<new> and should not
549 Creates a new object. Possible parameters are:
555 Path to the upgrade files to parse. Required.
559 C<SL::Form> object to use. Required.
563 Optional parameter defaulting to 0. If trueish then the scripts read
564 are the ones applying to the authentication database.
568 =item C<parse_dbupdate_controls>
570 Parses all files located in C<path> (see L<new>), ananlyzes their
571 control fields, builds the tree, and signals errors if control fields
572 are missing/wrong (e.g. a tag name listed in C<depends> is not
573 found). Sets C<$Self->{all_controls}> to the list of database
576 =item C<process_file $dbh, $filename, $version_or_control>
578 Applies a single database upgrade file. Calls L<process_perl_script>
579 for Perl update files and C<process_query> for SQL update
580 files. Requires an open database handle(C<$dbh>), the file name
581 (C<$filename>) and a hash structure of the file's control fields as
582 produced by L<parse_dbupdate_controls> (C<$version_or_control>).
584 Returns the result of the actual function called.
586 =item C<process_perl_script $dbh, $filename, $version_or_control>
588 Applies a single Perl database upgrade file. Requires an open database
589 handle(C<$dbh>), the file name (C<$filename>) and a hash structure of
590 the file's control fields as produced by L<parse_dbupdate_controls>
591 (C<$version_or_control>).
593 Perl scripts are executed via L<eval>. If L<eval> returns falsish then
594 an error is expected. There are two special return values: If the
595 script returns C<1> then the update was successful. Return code C<2>
596 means "needs more interaction from the user; unlock the system and
597 end current upgrade process". All other return codes are fatal errors.
599 Inside the Perl script several local variables exist that can be used:
605 A locale object for translating messages
609 The database handle (inside a transaction).
613 The global C<SL::Form> object.
617 A Perl script can actually implement queries that fail while
618 continuing the process by handling the transaction itself, e.g. with
619 the following function:
622 my ($query, $may_fail) = @_;
624 if (!$dbh->do($query)) {
625 die($dbup_locale->text("Database update error:") . "<br>$msg<br>" . $DBI::errstr) unless $may_fail;
631 =item C<process_query $dbh, $filename, $version_or_control>
633 Applies a single SQL database upgrade file. Requires an open database
634 handle(C<$dbh>), the file name (C<$filename>), and a hash structure of
635 the file's control fields as produced by L<parse_dbupdate_controls>
636 (C<$version_or_control>).
638 =item C<sort_dbupdate_controls>
640 Sorts the database upgrade scripts according to their C<tag> and
641 C<priority> control fields. Returns a list of their hash
642 representations that can be applied in order.
644 =item C<unapplied_upgrade_scripts $dbh>
646 Returns a list if upgrade scripts (their internal hash representation)
647 that haven't been applied to a database yet. C<$dbh> is an open handle
648 to the database that is checked.
650 Requires that the scripts have been parsed.
660 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>