[errdb] Add errdb.pl script to build error database

Signed-off-by: Michael Brown <mcb30@ipxe.org>

contrib/errdb/.gitignore

@@ -0,0 +1 @@
+errors.db

contrib/errdb/errdb.pl

@@ -0,0 +1,108 @@
+#!/usr/bin/perl -w
+
+=head1 NAME
+
+errdb.pl
+
+=head1 SYNOPSIS
+
+errdb.pl [options] ../../src/bin/errors
+
+Options:
+
+    -d,--database=db	Specify path to errors.db
+    -h,--help		Display brief help message
+    -v,--verbose	Increase verbosity
+    -q,--quiet		Decrease verbosity
+
+=cut
+
+use Getopt::Long;
+use Pod::Usage;
+use DBI;
+use strict;
+use warnings;
+
+# Parse command-line options
+my $verbosity = 0;
+my $errdb = "errors.db";
+Getopt::Long::Configure ( 'bundling', 'auto_abbrev' );
+GetOptions (
+  'database|d=s' => sub { shift; $errdb = shift; },
+  'verbose|v+' => sub { $verbosity++; },
+  'quiet|q+' => sub { $verbosity--; },
+  'help|h' => sub { pod2usage ( 1 ); },
+) or die "Could not parse command-line options\n";
+pod2usage ( 1 ) unless @ARGV >= 1;
+
+# Open database
+my $dbh = DBI->connect ( "dbi:SQLite:dbname=".$errdb, "", "",
+			 { RaiseError => 1, PrintError => 0 } );
+$dbh->begin_work();
+
+# Create errors table if necessary
+eval {
+  $dbh->selectall_arrayref ( "SELECT * FROM errors LIMIT 1" );
+};
+if ( $@ ) {
+  print "Creating errors table\n" if $verbosity >= 1;
+  $dbh->do ( "CREATE TABLE errors (".
+	     " errno char(8) NOT NULL,".
+	     " description text NOT NULL,".
+	     " PRIMARY KEY ( errno ) )" );
+}
+
+# Create xrefs table if necessary
+eval {
+  $dbh->selectall_arrayref ( "SELECT * FROM xrefs LIMIT 1" );
+};
+if ( $@ ) {
+  print "Creating xrefs table\n" if $verbosity >= 1;
+  $dbh->do ( "CREATE TABLE xrefs (".
+	     " errno char(8) NOT NULL,".
+	     " filename text NOT NULL,".
+	     " line integer NOT NULL,".
+	     " UNIQUE ( errno, filename, line ),".
+	     " FOREIGN KEY ( errno ) REFERENCES errors ( errno ) )" );
+  $dbh->do ( "CREATE INDEX xrefs_errno ON xrefs ( errno )" );
+}
+
+# Parse input file(s)
+my $errors = {};
+my $xrefs = {};
+while ( <> ) {
+  chomp;
+  ( my $errno, my $filename, my $line, my $description ) = split ( /\t/ );
+  $errors->{$errno} = $description;
+  $xrefs->{$errno} ||= {};
+  $xrefs->{$errno}->{$filename} ||= {};
+  $xrefs->{$errno}->{$filename}->{$line} ||= 1;
+}
+
+# Ensure all errors are present in database
+my $error_update =
+    $dbh->prepare ( "UPDATE errors SET description = ? WHERE errno = ?" );
+my $error_insert = $dbh->prepare ( "INSERT INTO errors VALUES ( ?, ? )" );
+while ( ( my $errno, my $description ) = each %$errors ) {
+  print "Error ".$errno." is \"".$description."\"\n" if $verbosity >= 2;
+  if ( $error_update->execute ( $description, $errno ) == 0 ) {
+    $error_insert->execute ( $errno, $description );
+  }
+}
+
+# Replace xrefs in database
+$dbh->do ( "DELETE FROM xrefs" );
+my $xref_insert = $dbh->prepare ( "INSERT INTO xrefs VALUES ( ?, ?, ? )" );
+while ( ( my $errno, my $xref_errno ) = each %$xrefs ) {
+  while ( ( my $filename, my $xref_filename ) = each %$xref_errno ) {
+    foreach my $line ( keys %$xref_filename ) {
+      print "Error ".$errno." is used at ".$filename." line ".$line."\n"
+	  if $verbosity >= 2;
+      $xref_insert->execute ( $errno, $filename, $line );
+    }
+  }
+}
+
+# Close database
+$dbh->commit();
+$dbh->disconnect();