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;
67 next unless (/^(--|\#)\s*\@/);
72 my @fields = split(/\s*:\s*/, $_, 2);
73 next unless (scalar(@fields) == 2);
75 if ($fields[0] =~ m{^(?:depends|required_by)$}) {
76 push(@{$control->{$fields[0]}}, split(/\s+/, $fields[1]));
77 } elsif ($fields[0] eq "locales") {
78 push @{$control->{locales}}, $fields[1];
80 $control->{$fields[0]} = $fields[1];
84 next if ($control->{ignore});
86 if (!$control->{"tag"}) {
87 _control_error($form, $file_name, $locale->text("Missing 'tag' field.")) ;
90 if ($control->{"tag"} =~ /[^a-zA-Z0-9_\(\)\-]/) {
91 _control_error($form, $file_name, $locale->text("The 'tag' field must only consist of alphanumeric characters or the carachters - _ ( )"))
94 if (defined($all_controls{$control->{"tag"}})) {
95 _control_error($form, $file_name, sprintf($locale->text("More than one control file with the tag '%s' exist."), $control->{"tag"}))
98 if (!$control->{"description"}) {
99 _control_error($form, $file_name, sprintf($locale->text("Missing 'description' field."))) ;
102 delete @{$control}{qw(depth applied)};
104 my @unknown_keys = grep { !m{^ (?: depends | required_by | description | file | ignore | locales | may_fail | priority | superuser_privileges | tag ) $}x } keys %{ $control };
106 _control_error($form, $file_name, sprintf($locale->text("Unknown control fields: #1", join(' ', sort({ lc $a cmp lc $b } @unknown_keys)))));
109 $control->{"priority"} *= 1;
110 $control->{"priority"} ||= 1000;
111 $control->{"file"} = $file;
113 $all_controls{$control->{"tag"}} = $control;
118 foreach my $name (keys %all_controls) {
119 my $control = $all_controls{$name};
121 foreach my $dependency (@{ delete $control->{required_by} }) {
122 _control_error($form, $control->{"file"}, sprintf($locale->text("Unknown dependency '%s'."), $dependency)) if (!defined($all_controls{$dependency}));
123 push @{ $all_controls{$dependency}->{depends} }, $name;
127 foreach my $control (values(%all_controls)) {
128 foreach my $dependency (@{$control->{"depends"}}) {
129 _control_error($form, $control->{"file"}, sprintf($locale->text("Unknown dependency '%s'."), $dependency)) if (!defined($all_controls{$dependency}));
132 map({ $_->{"loop"} = 0; } values(%all_controls));
133 _check_for_loops($form, $control->{"file"}, \%all_controls, $control->{"tag"});
136 map({ _dbupdate2_calculate_depth(\%all_controls, $_->{"tag"}) }
137 values(%all_controls));
139 $self->{all_controls} = \%all_controls;
145 $::lxdebug->enter_sub();
147 my ($self, $dbh, $filename, $version_or_control) = @_;
149 my $form = $self->{form};
150 my $fh = IO::File->new($filename, "<:encoding(UTF-8)");
156 return "No such file: $filename" if $self->{return_on_error};
157 $form->error("$filename : $!\n");
163 # Remove DOS and Unix style line endings.
166 for (my $i = 0; $i < length($_); $i++) {
167 my $char = substr($_, $i, 1);
169 # Are we inside a string?
171 if ($char eq $quote_chars[-1]) {
173 } elsif (length $quote_chars[-1] > 1
174 && substr($_, $i, length $quote_chars[-1]) eq $quote_chars[-1]) {
175 $i += length($quote_chars[-1]) - 1;
176 $char = $quote_chars[-1];
183 if (($char eq "'") || ($char eq "\"")) {
184 push(@quote_chars, $char);
186 } elsif ($char eq '$' # start of dollar quoting
187 && ($tag_end = index($_, '$', $i + 1)) > -1 # ends on same line
188 && (do { $tag = substr($_, $i + 1, $tag_end - $i - 1); 1 }) # extract tag
189 && $tag =~ /^ (?= [A-Za-z_] [A-Za-z0-9_]* | ) $/x) { # tag is identifier
190 push @quote_chars, $char = '$' . $tag . '$';
192 } elsif ($char eq "-") {
193 if ( substr($_, $i+1, 1) eq "-") {
194 # found a comment outside quote
197 } elsif ($char eq ";") {
199 # Query is complete. Send it.
201 $sth = $dbh->prepare($query);
202 if (!$sth->execute()) {
203 my $errstr = $dbh->errstr;
204 return $errstr // '<unknown database error>' if $self->{return_on_error};
207 if (!ref $version_or_control || ref $version_or_control ne 'HASH' || !$version_or_control->{may_fail}) {
208 $form->dberror("The database update/creation did not succeed. " .
209 "The file ${filename} containing the following " .
210 "query failed:<br>${query}<br>" .
211 "The error message was: ${errstr}<br>" .
212 "All changes in that file have been reverted.")
225 # Insert a space at the end of each line so that queries split
226 # over multiple lines work properly.
228 $query .= @quote_chars ? "\n" : ' ';
232 if (ref($version_or_control) eq "HASH") {
233 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{"tag"}) . ", " . $dbh->quote($form->{"login"}) . ")");
234 } elsif ($version_or_control) {
235 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
241 $::lxdebug->leave_sub();
247 # Process a Perl script which updates the database.
248 # If the script returns 1 then the update was successful.
249 # Return code "2" means "needs more interaction; unlock
250 # the system and end current request".
251 # All other return codes are fatal errors.
252 sub process_perl_script {
253 $::lxdebug->enter_sub();
255 my ($self, $dbh, $filename, $version_or_control) = @_;
257 my %form_values = %$::form;
261 # setup dbup_ export vars & run script
262 my %dbup_myconfig = map { ($_ => $::form->{$_}) } qw(dbname dbuser dbpasswd dbhost dbport dbconnect);
264 SL::DBUpgrade2::Base::execute_script(
265 file_name => $filename,
266 tag => $version_or_control->{tag},
268 myconfig => \%dbup_myconfig,
272 my $error = $EVAL_ERROR;
274 $dbh->rollback if 1 != ($result // -1);
276 return $error if $self->{return_on_error} && (1 != ($result // -1));
278 if (!defined($result)) {
279 print $::form->parse_html_template("dbupgrade/error", { file => $filename, error => $error });
280 $::dispatcher->end_request;
281 } elsif (1 != $result) {
282 SL::System::InstallationLock->unlock if 2 == $result;
283 $::dispatcher->end_request;
286 if (ref($version_or_control) eq "HASH") {
287 $dbh->do("INSERT INTO " . $self->{schema} . "schema_info (tag, login) VALUES (" . $dbh->quote($version_or_control->{tag}) . ", " . $dbh->quote($::form->{login}) . ")");
288 } elsif ($version_or_control) {
289 $dbh->do("UPDATE defaults SET version = " . $dbh->quote($version_or_control));
292 $dbh->commit if !$dbh->{AutoCommit} || $dbh->{BegunWork};
294 # Clear $::form of values that may have been set so that following
295 # Perl upgrade scripts won't have to work with old data (think of
296 # the usual 'continued' mechanism that's used for determining
297 # whether or not the upgrade form must be displayed).
298 delete @{ $::form }{ keys %{ $::form } };
299 $::form->{$_} = $form_values{$_} for keys %form_values;
301 $::lxdebug->leave_sub();
307 my ($self, $dbh, $filename, $version_or_control) = @_;
309 my $result = $filename =~ m/sql$/ ? $self->process_query( $dbh, $filename, $version_or_control)
310 : $self->process_perl_script($dbh, $filename, $version_or_control);
312 $::lxdebug->log_time("DB upgrade script '${filename}' finished");
317 sub unapplied_upgrade_scripts {
318 my ($self, $dbh) = @_;
320 my @all_scripts = map { $_->{applied} = 0; $_ } $self->sort_dbupdate_controls;
322 my $query = qq|SELECT tag FROM | . $self->{schema} . qq|schema_info|;
323 my $sth = $dbh->prepare($query);
324 $sth->execute || $self->{form}->dberror($query);
325 while (my ($tag) = $sth->fetchrow_array()) {
326 $self->{all_controls}->{$tag}->{applied} = 1 if defined $self->{all_controls}->{$tag};
330 return grep { !$_->{applied} } @all_scripts;
333 sub apply_admin_dbupgrade_scripts {
334 my ($self, $called_from_admin) = @_;
336 return 0 if !$self->{auth};
338 my $dbh = $::auth->dbconnect;
339 my @unapplied_scripts = $self->unapplied_upgrade_scripts($dbh);
341 return 0 if !@unapplied_scripts;
343 $self->{form}->{login} ||= 'admin';
345 if ($called_from_admin) {
346 $self->{form}->{title} = $::locale->text('Dataset upgrade');
347 $self->{form}->header;
350 print $self->{form}->parse_html_template("dbupgrade/header", { dbname => $::auth->{DB_config}->{db} });
352 $::lxdebug->log_time("DB upgrades commencing");
354 foreach my $control (@unapplied_scripts) {
355 $::lxdebug->message(LXDebug->DEBUG2(), "Applying Update $control->{file}");
356 print $self->{form}->parse_html_template("dbupgrade/upgrade_message2", $control);
358 $self->process_file($dbh, "sql/Pg-upgrade2-auth/$control->{file}", $control);
361 $::lxdebug->log_time("DB upgrades finished");
363 print $self->{form}->parse_html_template("dbupgrade/footer", { is_admin => 1 }) if $called_from_admin;
368 sub _check_for_loops {
369 my ($form, $file_name, $controls, $tag, @path) = @_;
373 my $ctrl = $controls->{$tag};
375 if ($ctrl->{"loop"} == 1) {
377 _control_error($form, $file_name, $::locale->text("Dependency loop detected:") . " " . join(" -> ", @path))
379 } elsif ($ctrl->{"loop"} == 0) {
382 map({ _check_for_loops($form, $file_name, $controls, $_, @path); } @{ $ctrl->{"depends"} });
388 my ($form, $file_name, $message) = @_;
391 my $locale = $::locale;
393 $form->error(sprintf($locale->text("Error in database control file '%s': %s"), $file_name, $message));
396 sub _dbupdate2_calculate_depth {
397 my ($tree, $tag) = @_;
399 my $node = $tree->{$tag};
401 return if (defined($node->{"depth"}));
405 foreach $tag (@{$node->{"depends"}}) {
406 _dbupdate2_calculate_depth($tree, $tag);
407 my $value = $tree->{$tag}->{"depth"};
408 $max_depth = $value if ($value > $max_depth);
411 $node->{"depth"} = $max_depth + 1;
414 sub sort_dbupdate_controls {
417 $self->parse_dbupdate_controls unless $self->{all_controls};
419 return sort { ($a->{depth} <=> $b->{depth}) || ($a->{priority} <=> $b->{priority}) || ($a->{tag} cmp $b->{tag}) } values %{ $self->{all_controls} };
431 SL::DBUpgrade2 - Parse database upgrade files stored in
432 C<sql/Pg-upgrade2> and C<sql/Pg-upgrade2-auth>
439 # Apply outstanding updates to the authentication database
440 my $scripts = SL::DBUpgrade2->new(
444 $scripts->apply_admin_dbupgrade_scripts(1);
446 # Apply updates to a user database
447 my $scripts = SL::DBUpgrade2->new(
451 User->dbupdate2(form => $form,
452 updater => $scripts->parse_dbupdate_controls,
453 database => $dbname);
457 Database upgrade files are used to upgrade the database structure and
458 content of both the authentication database and the user
459 databases. They're applied when a user logs in. As long as the
460 authentication database is not up to date users cannot log in in
461 general, and the admin has to log in first in order to get his
464 Database scripts form a tree by specifying which upgrade file depends
465 on which other upgrade file. This means that such files are always
466 applied in a well-defined order.
468 Each script is run in a separate transaction. If a script fails the
469 current transaction is rolled back and the whole upgrade process is
470 stopped. The user/admin is required to fix the issue manually.
472 A list of applied upgrade scripts is maintained in a table called
473 C<schema_info> for the user database and C<auth.schema_info>) for the
474 authentication database. They contain the tags, the login name of the
475 user having applied the script and the timestamp when the script was
478 Database upgrade files come in two flavours: SQL files and Perl
479 files. For both there are control fields that determine the order in
480 which they're executed etc. The control fields are tag/value pairs
481 contained in comments.
483 =head1 CONTROL FIELDS
487 Control fields for Perl files:
490 # @tag2: some more values
495 Control fields for SQL files:
498 -- @tag2: some more values
501 =head2 TAGS AND THEIR MEANING
503 The following tags are recognized:
509 The name for this file. The C<tag> is also used for dependency
510 resolution (see C<depends>).
516 A description presented to the user when the update is applied.
522 A space-separated list of tags of scripts this particular script
523 depends on. All other upgrades listed in C<depends> will be applied
524 before the current one is applied.
528 Ordering the scripts by their dependencies alone produces a lot of
529 groups of scripts that could be applied at the same time (e.g. if both
530 B and C depend only on A then B could be applied before C or the other
531 way around). This field determines the order inside such a
532 group. Scripts with lower priority fields are executed before scripts
533 with higher priority fields.
535 If two scripts have equal priorities then their tag name decides.
537 The priority defaults to 1000.
545 =item C<apply_admin_dbupgrade_scripts $called_from_admin>
547 Applies all unapplied upgrade files to the authentication/admin
548 database. The parameter C<$called_from_admin> should be truish if the
549 function is called from the web interface and falsish if it's called
550 from e.g. a command line script like C<scripts/dbupgrade2_tool.pl>.
552 =item C<init %params>
554 Initializes the object. Is called directly from L<new> and should not
559 Creates a new object. Possible parameters are:
565 Path to the upgrade files to parse. Required.
569 C<SL::Form> object to use. Required.
573 Optional parameter defaulting to 0. If trueish then the scripts read
574 are the ones applying to the authentication database.
578 =item C<parse_dbupdate_controls>
580 Parses all files located in C<path> (see L<new>), ananlyzes their
581 control fields, builds the tree, and signals errors if control fields
582 are missing/wrong (e.g. a tag name listed in C<depends> is not
583 found). Sets C<$Self->{all_controls}> to the list of database
586 =item C<process_file $dbh, $filename, $version_or_control>
588 Applies a single database upgrade file. Calls L<process_perl_script>
589 for Perl update files and C<process_query> for SQL update
590 files. Requires an open database handle(C<$dbh>), the file name
591 (C<$filename>) and a hash structure of the file's control fields as
592 produced by L<parse_dbupdate_controls> (C<$version_or_control>).
594 Returns the result of the actual function called.
596 =item C<process_perl_script $dbh, $filename, $version_or_control>
598 Applies a single Perl database upgrade file. Requires an open database
599 handle(C<$dbh>), the file name (C<$filename>) and a hash structure of
600 the file's control fields as produced by L<parse_dbupdate_controls>
601 (C<$version_or_control>).
603 Perl scripts are executed via L<eval>. If L<eval> returns falsish then
604 an error is expected. There are two special return values: If the
605 script returns C<1> then the update was successful. Return code C<2>
606 means "needs more interaction from the user; unlock the system and
607 end current upgrade process". All other return codes are fatal errors.
609 Inside the Perl script several local variables exist that can be used:
615 A locale object for translating messages
619 The database handle (inside a transaction).
623 The global C<SL::Form> object.
627 A Perl script can actually implement queries that fail while
628 continuing the process by handling the transaction itself, e.g. with
629 the following function:
632 my ($query, $may_fail) = @_;
634 if (!$dbh->do($query)) {
635 die($dbup_locale->text("Database update error:") . "<br>$msg<br>" . $DBI::errstr) unless $may_fail;
641 =item C<process_query $dbh, $filename, $version_or_control>
643 Applies a single SQL database upgrade file. Requires an open database
644 handle(C<$dbh>), the file name (C<$filename>), and a hash structure of
645 the file's control fields as produced by L<parse_dbupdate_controls>
646 (C<$version_or_control>).
648 =item C<sort_dbupdate_controls>
650 Sorts the database upgrade scripts according to their C<tag> and
651 C<priority> control fields. Returns a list of their hash
652 representations that can be applied in order.
654 =item C<unapplied_upgrade_scripts $dbh>
656 Returns a list if upgrade scripts (their internal hash representation)
657 that haven't been applied to a database yet. C<$dbh> is an open handle
658 to the database that is checked.
660 Requires that the scripts have been parsed.
670 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>