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myway.pl
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myway.pl
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#!/bin/sh
## no critic (RequireUseStrict)
exec perl -wx $0 "$@"
if 0;
#!perl -w
#line 7
###############################################################################
# HP Autonomy
###############################################################################
#
# myway.pl
#
# A perl re-implementation of flyway, maintaining 100% compatibility with
# flyway schema files and tables whilst providing enhanced automatic operation
# and resilience.
#
###############################################################################
# FIXME: # {{{
#
# * flyway-compliant --check and --migrate currently do nothing: --migrate can
# be assumed to be default, but --check should be treated as --dry-run?
#
# }}}
# TODO: # {{{
#
# * Roll-back and/or restore backups on failure;
#
# * In a Galera cluster, drop out of cluster prior to backup?
#
# * fork()/exec() pv when performing restorations, and check for failure. If
# so, show the last error from 'SHOW ENGINE INNODB STATUS';
#
# * When tokenising, check entry -> tokens -> tables -> db, and confirm it
# exists (caching already seen databases);
#
# ? Incorporate Cloud modules to allow backup directly to platform object store
# this may require splitting data into small (10MB) chunks and passing an
# overall manifest on completion, depending on platform;
#
# Likely deprecated:
#
# - Enhance Percona SQLParser code to handle more statement types;
#
# - Add parser for GRANT, etc.;
#
# - Allow 'parse' dbdump option to tokenise backup?
#
# }}}
# Copyright 2014-2016 Stuart Shelton, Autonomy Systems Ltd. & Hewlett Packard
# Enterprise Company.
# Portions of this program are copyright 2010-2012 Percona Inc.
#
# Feedback and improvements are welcome.
#
# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
# systems, you can issue `man perlgpl' or `man perlartistic' to read these
# licenses.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
# Place, Suite 330, Boston, MA 02111-1307 USA.
{
package myway;
## no critic (ProhibitSubroutinePrototypes)
use 5.014; # ... so that push/pop/etc work on scalars (experimental).
use strict;
use warnings;
use re '/a';
no if ( $] >= 5.02 ), warnings => 'experimental::autoderef';
# ... because we should be able to push and splice via references, noting that
# this warning doesn't exist on earlier perl versions and so can't be
# unconditionally disabled. Sigh.
# We have to enable and disable this module at run-time due to generating
# "Uncaught exception from user code" errors during certain DBI failures.
#use diagnostics;
# ... in actual fact, diagnostics causes more problems than it solves. It does
# appear to be, in reality, quite silly.
use constant VERSION => "1.4.0";
use constant TRUE => 1;
use constant FALSE => 0;
use constant DEBUG => ( $ENV{ 'DEBUG' } or FALSE );
use constant DEFDELIM => ';';
use constant PORT => 3306;
use constant VERTICAPORT => 5433;
use constant MARKER => '`<<VERSION>>';
use constant LOGMAX => 3; # debug
use constant SQLRETRYMAX => 3;
use constant SQLMAX => 15764; # 16299 is the experimental maximum length
# that MySQL accepts, and Vertica's limit
# is 535 characters less...
# Necessary non-default modules:
#
# * DBI::Format ( DBI::Shell, Text::Reform, IO::Tee )
# * File::Touch ()
# * File::Which ()
# * Data::GUID (Sub::Exporter, Params::Util, Data::OptList, Sub::Install, Data::UUID) - Only needed for Vertica
# * match::smart ( Sub::Infix )
# * Regexp::Common ()
# * Sort::Versions ()
#
use v5.10;
use match::smart;
use Cwd qw( getcwd realpath );
use DBI;
use DBI::Format;
use File::Basename;
use File::Copy;
use File::Glob qw( :glob );
use File::Path qw( make_path );
use File::Temp;
use File::Touch;
use File::Which;
use FileHandle;
use Getopt::Long qw( GetOptionsFromArray );
use Module::Loaded qw( is_loaded );
use Pod::Usage;
## no critic (ProhibitStringyEval)
#use Readonly;
#if( eval "require( Readonly::XS ); 1;" ) {
# Readonly::XS -> import();
#}
use Regexp::Common;
use Scalar::Util qw( looks_like_number );
use Sort::Versions;
use Time::HiRes qw( gettimeofday tv_interval );
## no critic (ProhibitStringyEval)
if( eval "require( DBD::ODBC ); 1;" ) {
DBD::ODBC -> import();
if( eval "require( Data::GUID ); 1;" ) {
Data::GUID -> import();
}
}
use Data::Dumper;
#use Devel::StackTrace; # Core with Perl 5.20, apparently not present on Ubuntu
# 14.04 LTS release.
#use if ( DEBUG ), 'Devel::Trace';
sub pdebug( $;$$ );
sub pcomment( $;$$ );
sub psql( $;$$ );
sub pnote( $;$$ );
sub pwarn( $;$$ );
sub pfail( $;$$ );
sub pfatal( $;$$ );
sub initstate();
sub compressquotes( $$ );
sub decompressquotes( $$ );
sub checkentry( $$;$$ );
sub pushstate( $$ );
sub pushentry( $$$$$;$ );
sub pushfragment( $$$;$$ );
sub processcomments( $$$;$ );
sub processline( $$;$$ );
sub processfile( $$;$$$$ );
sub dbopen( $$$$;$$ );
sub dbclose( ;$$$$ );
sub dbdump( $;$$$$ );
sub dbrestore( $$;$ );
sub verticasetsearchpath( $$;$ );
sub dbcheckconnection( $;$ );
sub sqldo( $$;$ );
sub sqlprepare( $$ );
sub sqlexecute( $$;$@ );
sub sqlgetvalue( $$;$ );
sub sqlgetvalues( $$;$ );
sub outputtable( $$;$ );
sub formatastable( $$$ );
sub databasegetinfo( $;$$$ );
sub metadatamigrateschema( $;$$$ );
sub metadataupdateflywaytable( $$$$$$ );
sub applyschema( $$$$;$ );
sub main( @ );
our $fatal = "FATAL: ";
our $failed = "FAIL: ";
our $warning = "WARN: ";
our $info = "INFO: ";
# XXX: Too many globals... :(
# Maintain a simple counter to check that we're not double-opening (or double-
# closing) DBI database connections. There should be sufficient checks to
# detect this eventuality - but an additional counter does little harm...
our $dbconns = 0;
our $verbosity = 0;
# This simply tracks whether either of quiet or silent are specified, as a very
# simple time-saver to reduce the number of parameters which functions must be
# passed...
our $quietorsilent = FALSE;
# Currently, this determines whether we'll execute DROP statements - ideally,
# we'd allow this in developer environments but not in production... however,
# environment names are merely labels, and hold no additional meaning.
our $allowunsafe = FALSE;
# XXX: It would be nice if this wasn't a global, but the degree of separation
# between where we could plausibly set this and where we use it are too
# great to make this easily localisable...
our $tokenise = FALSE;
# XXX: We're seeing random disconnects after successful commands with Vertica
# so this provides a temporary way to alert and attempt to reconnect...
#
# The logic here is that if retries is defined, which is usually the case, then
# standard error-checking is performed. If retries is undefined then we return
# without further error-checking on the assumption that we've been called from
# *within* an error-checking function, and don't want to spiral off into
# infinity...
our $connection;
our $retries = 0;
# ... and, of course, Vertica is very special :(
our $searchpath;
# # Schema and related data... # {{{
# Changes in flyway release 4.0:
# `version_rank` is removed;
# `version` is no longer NOT NULL;
# `checksum` is still not DEFAULT NULL (although this was a myway change);
# The `version_rank` and `installed_rank` indices are removed;
# `installed_rank` is now the PRIMARY KEY;
# The `type` value 'INIT' is now 'BASELINE'.
#
our $flywayinit = 'BASELINE';
our $flywayinitdesc = '<< Flyway Baseline >>';
our $mywayhistoryname = 'myway_version_history';
our $mywayhistoryddl = <<DDL;
CREATE TABLE IF NOT EXISTS `$mywayhistoryname` (
`id` INT UNSIGNED AUTO_INCREMENT NOT NULL
, `myway_version` VARCHAR(15) NOT NULL
, `flyway_compatible` VARCHAR(15) NOT NULL
, `type` VARCHAR(20) NOT NULL
, `description` VARCHAR(200) NOT NULL
, `migrated` BOOLEAN DEFAULT '0' NOT NULL
, PRIMARY KEY (`id`)
, CONSTRAINT `${mywayhistoryname}_unique` UNIQUE (`myway_version`)
) ENGINE='InnoDB' DEFAULT CHARSET='ASCII';
DDL
our $verticamywayhistoryddl = <<DDL;
CREATE TABLE IF NOT EXISTS __SCHEMA__"$mywayhistoryname" (
"id" AUTO_INCREMENT
, "myway_version" VARCHAR(15) NOT NULL
, "flyway_compatible" VARCHAR(15) NOT NULL
, "type" VARCHAR(15) NOT NULL
, "description" VARCHAR(200) NOT NULL
, "migrated" BOOLEAN DEFAULT FALSE NOT NULL
, PRIMARY KEY ("id") ENABLED
, CONSTRAINT "${mywayhistoryname}_unique" UNIQUE ("myway_version") ENABLED
)
ORDER BY "id"
SEGMENTED BY HASH( "myway_version" ) ALL NODES;
DDL
# It's entirely possible that `installed_rank` should be an auto-increment
# column - but there used to exist a separate `version_rank` attribute which
# was removed in Flyway 4.0, and Flyway does not itself use auto-increment.
# 'ORDER BY "version"' is as-per Flyway's schema.
our $flywaytablename = 'schema_version';
our $flywayddl = <<DDL;
CREATE TABLE IF NOT EXISTS `$flywaytablename` (
`installed_rank` INT NOT NULL
, `version` VARCHAR(50)
, `description` VARCHAR(200) NOT NULL
, `type` VARCHAR(20) NOT NULL
, `script` VARCHAR(1000) NOT NULL
, `checksum` INT DEFAULT NULL
, `installed_by` VARCHAR(100) NOT NULL
, `installed_on` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL
, `execution_time` INT NOT NULL
, `success` BOOLEAN NOT NULL
, CONSTRAINT `${flywaytablename}_pk` PRIMARY KEY (`installed_rank`)
, KEY `${flywaytablename}_s_idx` (`success`)
) ENGINE='InnoDB' DEFAULT CHARSET='UTF8';
DDL
our $verticaflywayddl = <<DDL;
CREATE TABLE IF NOT EXISTS __SCHEMA__"$flywaytablename" (
"installed_rank" INT NOT NULL
, "version" VARCHAR(50)
, "description" VARCHAR(200) NOT NULL
, "type" VARCHAR(20) NOT NULL
, "script" VARCHAR(1000) NOT NULL
, "checksum" INT DEFAULT NULL
, "installed_by" VARCHAR(100) NOT NULL
, "installed_on" TIMESTAMP DEFAULT now() NOT NULL
, "execution_time" INT NOT NULL
, "success" BOOLEAN NOT NULL
, PRIMARY KEY ("installed_rank") ENABLED
)
ORDER BY "version"
SEGMENTED BY HASH( "version" ) ALL NODES;
DDL
# Note that field-lengths in myway* tables are not arbitrary, but instead are
# sized to hold the maximum permissible value for the field-type, according to
# the appropraite standards - mostly POSIX.
#
# TIMESTAMP fields must be provided with a non-zero default value (or NULL)
# as the //second// and further TIMESTAMP fields will be implicitly created
# as DEFAULT 0, which breaks when NO_ZERO_DATE is in effect...
#
our $mywaytablename = 'myway_schema_version';
our $mywayddl = <<DDL;
CREATE TABLE IF NOT EXISTS `$mywaytablename` (
`id` CHAR(36) NOT NULL
, `dbuser` CHAR(16) NOT NULL
, `dbhost` CHAR(64) NOT NULL
, `osuser` CHAR(32) NOT NULL
, `host` CHAR(64) NOT NULL
, `sha1sum` CHAR(40) NOT NULL
, `path` VARCHAR(4096) CHARACTER SET 'UTF8' NOT NULL
, `filename` VARCHAR(255) CHARACTER SET 'UTF8' NOT NULL
, `started` TIMESTAMP
, `sqlstarted` TIMESTAMP DEFAULT NULL NULL
, `finished` TIMESTAMP DEFAULT NULL NULL
, `status` TINYINT UNSIGNED
, PRIMARY KEY (`id`)
) ENGINE='InnoDB' DEFAULT CHARSET='ASCII';
DDL
our $verticamywayddl = <<DDL;
CREATE TABLE IF NOT EXISTS __SCHEMA__"$mywaytablename" (
"id" CHAR(36) NOT NULL
, "dbuser" CHAR(16) NOT NULL
, "dbhost" CHAR(64) NOT NULL
, "osuser" CHAR(32) NOT NULL
, "host" CHAR(64) NOT NULL
, "sha1sum" CHAR(40) NOT NULL
, "path" VARCHAR(4096) NOT NULL
, "filename" VARCHAR(255) NOT NULL
, "started" TIMESTAMP
, "sqlstarted" TIMESTAMP DEFAULT NULL NULL
, "finished" TIMESTAMP DEFAULT NULL NULL
, "status" INT
, PRIMARY KEY ("id") ENABLED
)
ORDER BY "started"
SEGMENTED BY HASH( "id" ) ALL NODES;
DDL
# Previously, `statement` was of type VARCHAR(16384) - but SQL statements may
# be as many bytes as specified by the 'max_allowed_packet' variable, which
# defaults to 16MB. To cope with this without truncation, we must use a TEXT
# field-type. It is possible that, since this occurance is rare, it would be
# more advantageous performance-wise to store two fields: one for 'short' lines
# (of up to 21844 (3-byte) UTF-8 characters) and one for lines that wouldn't
# fit into a maximally-sized VARCHAR()...
#
# Vertica has a maximum VARCHAR length of 65000 octets, or 16250 4-byte UTF-8
# characters.
#
# Both databases also limit the maximum size of any given row to 64k/65000
# octets respectively, so the actual maximum length is even shorter...
#
# With the schema below, the maximum size MySQL accepts is 5486 - which must
# be taken into account if this schema is further changed in the future. Since
# Vertica's limit is 535 octets shorter than MySQL's, and a character may be up
# to 4 octets, we have to assume that the limit we need to impose is actually
# 134 characters shorter at 5352.
#
# Update: Schema-analysis tools complain about this table lacking a Primary
# Key, and there is also a 'innodb_force_primary_key' option which (is
# supposed to) fail if no PK is present...
#
our $mywayactionsname = 'myway_schema_actions';
our $mywayactionsddl = <<DDL;
CREATE TABLE IF NOT EXISTS `$mywayactionsname` (
`id` INT UNSIGNED AUTO_INCREMENT NOT NULL
, `schema_id` CHAR(36) NOT NULL
, `started` TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP NOT NULL
, `event` VARCHAR(256) NOT NULL
, `statement` VARCHAR(@{[SQLMAX]}) CHARACTER SET 'UTF8MB4'
, `statement_long` LONGTEXT CHARACTER SET 'UTF8MB4'
, `line` INT UNSIGNED
, `time` DECIMAL(13,3)
, `state` CHAR(5)
, PRIMARY KEY (`id`)
, INDEX `${mywayactionsname}_schema_id_idx` (`schema_id`)
, CONSTRAINT `${mywayactionsname}_schema_id_${mywaytablename}_id`
FOREIGN KEY (`schema_id`) REFERENCES `$mywaytablename` (`id`)
ON DELETE CASCADE
) ENGINE='InnoDB' DEFAULT CHARSET='ASCII';
DDL
our $verticamywayactionsddl = <<DDL;
CREATE TABLE IF NOT EXISTS __SCHEMA__"$mywayactionsname" (
"id" AUTO_INCREMENT
, "schema_id" CHAR(36) NOT NULL
, "started" TIMESTAMP(6) DEFAULT CURRENT_TIMESTAMP NOT NULL
, "event" VARCHAR(256) NOT NULL
, "statement" VARCHAR(@{[SQLMAX]})
, "statement_long" LONG VARCHAR
, "line" INT
, "time" DECIMAL(13,3)
, "state" CHAR(5)
, PRIMARY KEY ("id") ENABLED
, CONSTRAINT "${mywayactionsname}_schema_id_${mywaytablename}_id"
FOREIGN KEY ("schema_id") REFERENCES __SCHEMA__"$mywaytablename" ("id")
)
ORDER BY "schema_id"
SEGMENTED BY HASH( "schema_id" ) ALL NODES;
DDL
our $mywayprocsname = 'myway_stored_procedures';
our $mywayprocsddl = <<DDL;
CREATE TABLE IF NOT EXISTS `$mywayprocsname` (
`id` CHAR(36) NOT NULL
, `dbuser` CHAR(16) NOT NULL
, `dbhost` CHAR(64) NOT NULL
, `osuser` CHAR(32) NOT NULL
, `host` CHAR(64) NOT NULL
, `sha1sum` CHAR(40) NOT NULL
, `path` VARCHAR(4096) NOT NULL
, `filename` VARCHAR(255) NOT NULL
, `version` VARCHAR(50)
, `description` VARCHAR(200)
, `type` VARCHAR(20)
, `started` TIMESTAMP
, `sqlstarted` TIMESTAMP DEFAULT NULL NULL
, `finished` TIMESTAMP DEFAULT NULL NULL
, `status` TINYINT UNSIGNED
, PRIMARY KEY (`id`)
) ENGINE='InnoDB' DEFAULT CHARSET='ASCII';
DDL
our $verticamywayprocsddl = <<DDL;
CREATE TABLE IF NOT EXISTS __SCHEMA__"$mywayprocsname" (
"id" CHAR(36) NOT NULL
, "dbuser" CHAR(16) NOT NULL
, "dbhost" CHAR(64) NOT NULL
, "osuser" CHAR(32) NOT NULL
, "host" CHAR(64) NOT NULL
, "sha1sum" CHAR(40) NOT NULL
, "path" VARCHAR(4096) NOT NULL
, "filename" VARCHAR(255) NOT NULL
, "version" VARCHAR(50)
, "description" VARCHAR(200)
, "type" VARCHAR(20)
, "started" TIMESTAMP
, "sqlstarted" TIMESTAMP DEFAULT NULL NULL
, "finished" TIMESTAMP DEFAULT NULL NULL
, "status" INT
, PRIMARY KEY ("id") ENABLED
)
ORDER BY "started"
SEGMENTED BY HASH( "id" ) ALL NODES;
DDL
# }}}
# Note that any data output using 'print' will (by default) go to stdout,
# whereas everything output by the four functions below will go to stderr (in
# long mode).
#
# If myway.pl is invoked by the accompanying applyschema.sh script, then all
# data written to stdout will be thrown away if '--quiet' is in effect (and,
# indeed, almost all output will be discarded if '--silent' is used).
#
# Therefore, use the functions below for any output which it is important that
# the user see, and reserve the use of print for general status updates, such
# as non-essential progress reporting.
sub pdebug( $;$$ ) { # {{{
my( $text, $verbose, $short ) = @_;
$verbose = $verbosity unless( defined( $verbose ) );
# Output $text at levels: debug(3)
#
return( undef ) unless ( $short or DEBUG or ( $verbose > 2 ) );
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $debug = "DEBUG: ";
$debug = '=>' if( defined( $short ) and $short );
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( not( length( $line ) ) ) {
print( "\n" );
} else {
if( defined( $short ) ) {
# Short debug output is used more for continuous progress
# reporting than actual debug data...
print( "$debug $line\n" );
} else {
my $firstword = ( split( /\s/, $line ) )[ 0 ];
if( $firstword =~ m/^[A-Z]+:/ ) {
$line =~ s/^$firstword //;
$debug = ' ' x ( length( $debug ) - length ( $firstword ) - 1 ) . $firstword . ' ';
}
warn( "$debug $line\n" );
}
}
}
return( TRUE );
} # pdebug # }}}
sub pcomment( $;$$ ) { # {{{
my( $text, $ignored, $_ignored ) = @_;
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $comment = ' >';
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
print( "$comment $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # pcomment # }}}
sub psql( $;$$ ) { # {{{
my( $text, $ignored, $_ignored ) = @_;
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $sql = '->';
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
print( "$sql $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # psql # }}}
sub psim( $;$$ ) { # {{{
my( $text, $ignored, $_ignored ) = @_;
# $pretend is not in scope here :(
#pdebug( "psim() called with \$pretend unset\n" ) unless( $pretend );
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $sim = 'S>';
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
print( "$sim $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # psql # }}}
sub pnote( $;$$ ) { # {{{
my( $text, $verbose, $short ) = @_;
$verbose = $verbosity unless( defined( $verbose ) );
# Output $text at levels: debug(3), notice(2)
#
#return( undef ) unless( $short or ( $verbose > 1 ) );
return( undef ) unless( $verbose > 1 );
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $note = "NOTICE:";
$note = '*>' if( defined( $short ) and $short );
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
warn( "$note $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # pnote # }}}
sub pwarn( $;$$ ) { # {{{
my( $text, $verbose, $short ) = @_;
$verbose = $verbosity unless( defined( $verbose ) );
# Output $text at levels: debug(3), notice(2), warn(1)
#
#return( undef ) unless( $short or ( $verbose > 0 ) );
return( undef ) unless( $verbose > 0 );
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
our $warn = $warning;
$warn = '!>' if( defined( $short ) and $short );
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
warn( "$warn $text\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # pwarn # }}}
sub pfail( $;$$ ) { # {{{
my( $text, $ignored, $_ignored ) = @_;
# Output $text regardless
#
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
warn( "$failed $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # pfail # }}}
sub pfatal( $;$$ ) { # {{{
my( $text, $ignored, $_ignored ) = @_;
# Output $text regardless
#
$text = '' unless( defined( $text ) and length( $text ) );
chomp $text;
foreach my $line ( split /\n/, $text ) {
chomp $line;
if( length( $line ) ) {
warn( "$fatal $line\n" );
} else {
print( "\n" );
}
}
return( TRUE );
} # pfatal # }}}
sub initstate() { # {{{
# Known single-line comments
my @slc = (
'#'
, qw( // -- )
);
# Known multi-line comment pairs
my %mlc = (
'\/\*' => '\*\/'
, '\{' => '\}'
);
# We can now rely on Regexp::Common's $RE{ quoted } match, rather than
# having to handle quotes ourselves...
## Known quotation symbols
#my @quo = (
# '`'
# , "'"
# , '"'
#);
my @str = ();
my %state = (
'file' => undef # Current filename, for logging purposes
, 'symbol' => undef # Used to hold the closing characters of a multi-line comment or statement delimiter
, 'depth' => 0 # Comment nesting depth
, 'line' => 0 # Line of input on which current entry starts
, 'type' => undef # Entry type: comment, statement, or fragment
, 'entry' => undef # Current entry contents
);
@{ $state{ 'slc' } } = @slc;
%{ $state{ 'mlc' } } = %mlc;
#@{ $state{ 'quo' } } = @quo;
@{ $state{ 'str' } } = @str;
return( \%state );
} # initstate # }}}
sub compressquotes( $$ ) { # {{{
my( $line, $state ) = @_;
# We can now rely on Regexp::Common's $RE{ quoted } match, rather than
# having to handle quotes ourselves...
#my @quo = @{ $state -> { 'quo' } };
#my $quochanged = FALSE;
#
## Try to isolate any quoted text (to be expanded out later) so that we
## aren't trying to comment-check user-data...
##
#for( my $index = 0 ; $index < scalar( @quo ) ; $index++ ) {
# my $character = $quo[ $index ];
# $quochanged = TRUE if( $line =~ s/(\\$character|$character$character)/__MW_QUO_${index}__/g );
#}
#pdebug( " q Escaped-quote filtered line is now '$line'" ) if( $quochanged );
# We're only going to attempt to handle quoted text which starts and
# ends on the same line. However, a string such as:
#
# don't do this */ /* don't do this either
#
# ... is problematic because the central portion does appear to be a
# valid quoted string. If we were to process comments first and only
# look for quoted strings outside of comments, then we risk thinking
# that text within a quoted string such as:
#
# mime-type: text/*
#
# ... is actually the start of a comment. At least we can ensure that
# apparent quotes are balanced before we consider them...
#
my $filteredline = $line;
my $strchanged = FALSE;
foreach my $match ( ( $line =~ m/$RE{ quoted }/g ) ) {
my $index = scalar( @{ $state -> { 'str' } } );
$filteredline =~ s/\Q$match\E/__MW_STR_${index}__/;
push( $state -> { 'str' }, $match );
$strchanged = TRUE;
pdebug( " q Replacing '$match' with '__MW_STR_${index}__' to give '$filteredline'" );
}
#pdebug( " q Quote-reduced line is now '$filteredline'" ) if( $quochanged or $strchanged );
pdebug( " q Quote-reduced line is now '$filteredline'" ) if( $strchanged );
return( $filteredline );
} # compressquotes # }}}
sub decompressquotes( $$ ) { # {{{
my( $line, $state ) = @_;
return( undef ) unless( defined( $line ) and length( $line ) );
# This function must perform the exact opposite of compressquotes(),
# above...
my @str = @{ $state -> { 'str' } };
my $strchanged = FALSE;
if( scalar( @str ) ) {
# For some reason, I can't initialise with scalar( @str ) and
# then decrement with --$index?
#
for( my $index = ( scalar( @str ) - 1 ) ; $index >= 0 ; $index-- ) {
my $match = $str[ $index ];
if( defined( $match ) and length( $match ) ) {
if( $line =~ s/__MW_STR_${index}__/$match/ ) {
pdebug( " Q Replaced '__MW_STR_${index}__' with '$match' to give '$line'" );
$strchanged = TRUE;
@{ $state -> { 'str' } }[ $index ] = undef;
}
}
}
}
# We can now rely on Regexp::Common's $RE{ quoted } match, rather than
# having to handle quotes ourselves...
#my @quo = @{ $state -> { 'quo' } };
#my $quochanged = FALSE;
#
#if( scalar( @quo ) ) {
# for( my $index = ( scalar( @quo ) - 1 ) ; $index >= 0 ; $index -- ) {
# my $character = $quo[ $index ];
#
# # We don't store whether the character was backslash-
# # escaped or double-character escaped - let's default
# # to the former, on the basis of it being more
# # obivous...
# #
# if( $line =~ s/__MW_QUO_${index}__/\\$character/g ) {
# $quochanged = TRUE;
# }
# }
# pdebug( " Q Escaped-quote filtered line is now '$line'" ) if( $quochanged );
#}
#pdebug( " Q Quote-expanded line is now '$line'" ) if( $quochanged or $strchanged );
pdebug( " Q Quote-expanded line is now '$line'" ) if( $strchanged );
return( $line );
} # decompressquotes # }}}
sub checkentry( $$;$$ ) { # {{{
my( $data, $state, $description, $line ) = @_;
$line = $. unless( defined( $line ) );
if( defined( $state -> { 'entry' } ) and scalar( @{ $state -> { 'entry' } } ) ) {
pdebug( " * " . ( defined( $description ) ? $description . ' n' : 'N' ) . "esting error near line $line - " . scalar( @{ $state -> { 'entry' } } ) . " fragment(s) still defined - adding regardless" );
my $count = 0;
foreach my $entry ( @{ $state -> { 'entry' } } ) {
$count++;
pdebug( "--- \$state $count contains '$entry'" );
}
$state -> { 'entry' } = 'fragment';
if( defined( $data -> { 'entries' } ) ) {
push( $data -> { 'entries' }, { 'line' => $state -> { 'line' }, 'type' => $state -> { 'type' }, 'entry' => $state -> { 'entry' } } );
} else {
$data -> { 'entries' } = [ { 'line' => $state -> { 'line' }, 'type' => $state -> { 'type' }, 'entry' => $state -> { 'entry' } } ];
}
$state -> { 'line' } = 0;
undef( $state -> { 'type' } );
undef( $state -> { 'entry' } );
$count = scalar( @{ $data -> { 'entries' } } );
pdebug( "... we now have $count " . ( ( 1 == $count ) ? 'entry' : 'entries' ) );
return( FALSE );
}
return( TRUE );
} # checkentry # }}}
sub pushentry( $$$$$;$ ) { # {{{
my( $data, $state, $type, $entry, $description, $line ) = @_;
if( $entry =~ m/__MW_(STR|L?TOK|LITERAL_QUOTE_)_/ ) {
pwarn( "\n" );
pwarn( "Unexpended token detected in `$entry`\n" );
#my $trace = Devel::StackTrace -> new;
#print( $trace -> as_string );
die( "$fatal Tokenisation failed [" . ( caller( 0 ) )[ 3 ] . ':' . __LINE__ . "]\n" );
}
$line = $. unless( defined( $line ) );
pdebug( " E Adding " . ( defined( $description ) ? lc( $description ) . ' ' : '' ) . "entry '$entry' of type '$type' from line $line ..." );
checkentry( $data, $state, $description, $line );
my $element;
$element -> { 'line' } = $line;
$element -> { 'type' } = $type;
$element -> { 'entry' } = $entry;
pdebug( " E Pushing $type '$entry' ..." );
if( defined( $data -> { 'entries' } ) ) {
push( $data -> { 'entries' }, $element );
} else {
$data -> { 'entries' } = [ $element ];
}
my $count = scalar( @{ $data -> { 'entries' } } );
pdebug( "... we now have $count " . ( ( 1 == $count ) ? 'entry' : 'entries' ) );
return( $count );
} # pushentry # }}}
sub pushstate( $$ ) { # {{{
my( $data, $state ) = @_;
my $entries = "entries";
my $count = 0;
$count = scalar( @{ $state -> { 'entry' } } ) if( defined( $state -> { 'entry' } ) );
$entries = "entry" if( 1 == $count );
my $element;
$element -> { 'line' } = $state -> { 'line' } if( defined( $state -> { 'line' } ) );
$element -> { 'type' } = $state -> { 'type' } if( defined( $state -> { 'type' } ) );
$element -> { 'entry' } = $state -> { 'entry' } if( defined( $state -> { 'entry' } ) );
$element -> { 'tokens' } = $state -> { 'tokens' } if( defined( $state -> { 'tokens' } ) );
if( defined( $data -> { 'entries' } ) ) {
pdebug( " T Adding $count $entries from \$state to \$data -> { 'entries' } ..." );
push( $data -> { 'entries' }, $element );
} else {
pdebug( " T Setting \$data -> { 'entries' } to $count $entries from \$state" );
$data -> { 'entries' } = [ $element ];
}
$count = scalar( @{ $data -> { 'entries' } } );
pdebug( " T ... we now have $count " . ( ( 1 == $count ) ? 'entry' : 'entries' ) );
return( $count );
} # pushstate # }}}
sub pushfragment( $$$;$$ ) { # {{{
my( $state, $type, $entry, $description, $line ) = @_;
if( $entry =~ m/__MW_(STR|L?TOK|LITERAL_QUOTE_)_/ ) {
pwarn( "\n" );
pwarn( "Unexpended token detected in `$entry`\n" );
#my $trace = Devel::StackTrace -> new;
#print( $trace -> as_string );
die( "$fatal Tokenisation failed [" . ( caller( 0 ) )[ 3 ] . ':' . __LINE__ . "]\n" );
}
$line = $. unless( defined( $line ) );
pdebug( " F Adding " . ( defined( $description ) ? $description . ' ' : '' ) . "fragment '$entry' of type '$type' from line $line ..." );
if( defined( $state -> { 'entry' } ) ) {
push( $state -> { 'entry' }, ( defined( $entry ) ? $entry : '' ) );
} else {
$state -> { 'line' } = $line;
$state -> { 'type' } = $type;
$state -> { 'entry' } = [ ( defined( $entry ) ? $entry : '' ) ];
}
my $count = scalar( @{ $state -> { 'entry' } } );
# XXX: This is a bit too verbose - uncomment if debugging fragment
# processing...
#
#pdebug( " F ... current fragment contains $count " . ( ( 1 == $count ) ? 'line' : 'lines' ) . ':' );
#for( my $n = 0 ; $n < $count ; $n++ ) {
# pdebug( ' F ... ' . ( $n + 1 ) . ': ' . @{ $state -> { 'entry' } }[ $n ] );
#}
#pdebug( ' F ... EOF' );
pdebug( " F ... current fragment contains $count " . ( ( 1 == $count ) ? 'line' : 'lines' ) );
return( $count );
} # pushfragment # }}}
sub processcomments( $$$;$ ) { # {{{
my( $data, $line, $masterstate, $strict ) = @_;
return( undef ) unless( defined( $masterstate -> { 'comments' } ) );
my $state = $masterstate -> { 'comments' };
my @slc = @{ $state -> { 'slc' } };
my %mlc = %{ $state -> { 'mlc' } };
$line = compressquotes( $line, $masterstate );
# Handle comments