#!/usr/bin/perl -w
#
# Do-rpm - compile RPM packages out of a source tarball and move the
# resulting RPM packages into the current directory.
#
# The script currently assumes the following environment (which should exist
# like that, if the Do-compile script was used to build the binary
# distribution)
#
# - there must be a source distribution (mysql-<version>.tar.gz)
#   in the current directory
# - there must be a spec file (mysql-<version>.spec) in the directory
#   $HOME/<hostname>/mysql-<version>/support-files/
#
# Use the "--help" option for more info!
#
# written by Lenz Grimmer <lenz@mysql.com>
#

use Cwd;
use File::Basename;
use File::Copy;
use Getopt::Long;
Getopt::Long::Configure ("bundling");
use Sys::Hostname;

$opt_cc= undef;
$opt_cflags= undef;
$opt_clean= undef;
$opt_cxx= undef;
$opt_cxxflags= undef;
$opt_dry_run= undef;
$opt_help= undef;
$opt_log= undef;
$opt_mail= "";
$opt_verbose= undef;

$MAJOR= $MINOR= $RELEASE= 0;

GetOptions(
	"cc=s",
	"cflags=s",
	"clean|c",
	"cxx=s",
	"cxxflags=s",
	"dry-run|t",
	"help|h",
	"log|l:s",
	"mail|m=s",
	"verbose|v",
) || &print_help;

defined($VERSION=$ARGV[0]) || print_help("Please provide the MySQL version!");

# Include helper functions
$PWD= cwd();
$LOGGER= "$PWD/logger.pm";
if (-f "$LOGGER")
{
	do "$LOGGER";
}
else
{
	die "ERROR: $LOGGER cannot be found!\n";
}

#
# Override predefined Log file name
#
if (defined $opt_log)
{
	if ($opt_log ne "")
	{
		if ($opt_log =~ /^\/.*/)
		{
			$LOGFILE= $opt_log;
		}
		else
		{
			$LOGFILE= $PWD . "/" . $opt_log;
		}
	}
}

($MAJOR, $MINOR, $RELEASE)= split(/\./, $VERSION);
$HOST= hostname();
$HOST=~ /^([^.-]*)/;
$HOST= $1;
$LOGFILE= "$PWD/Logs/Do-rpm-$HOST-$MAJOR.$MINOR.log";

&print_help("") if ($opt_help);

#
# Newer RPM versions ship with a separate tool "rpmbuild" to build RPMs
#
if (-x "/usr/bin/rpmbuild")
{
	$RPM= "/usr/bin/rpmbuild";
}
else
{
	$RPM= "/bin/rpm";
}

if ($RPM)
{
	&logger("Found rpm binary: $RPM");
}
else
{
	&abort("Unable to find RPM binary!");
}

#
# determine some RPM settings for this host
#
chomp($RPMARCH= `$RPM --eval "%{_arch}" 2> /dev/null`);
chomp($RPMDIR= `$RPM --eval "%{_rpmdir}" 2> /dev/null`);
chomp($SOURCEDIR= `$RPM --eval "%{_sourcedir}" 2> /dev/null`);
chomp($SPECDIR= `$RPM --eval "%{_specdir}" 2> /dev/null`);
chomp($SRCRPMDIR= `$RPM --eval "%{_srcrpmdir}" 2> /dev/null`);

$SOURCEFILE= "mysql-$VERSION.tar.gz";
$SPECFILE= "$PWD/$HOST/mysql-$VERSION/support-files/mysql-$VERSION.spec";

&logger("Starting RPM build of MySQL-$VERSION on $HOST");

foreach $file ($SOURCEFILE, $SPECFILE)
{
	&abort("Unable to find $file!") unless (-f "$file");
}

#
# Install source and spec file
#
&logger("Copying SOURCE and SPEC file to build directories.");
copy($SOURCEFILE, $SOURCEDIR)
or &abort("Unable to copy $SOURCEFILE to $SOURCEDIR!");
copy($SPECFILE, $SPECDIR)
or &abort("Unable to copy $SPECFILE to $SPECDIR!");

#
# Set environment variables - these are being used in the
# official MySQL RPM spec file
#
&logger("Setting special build environment variables")
if ($opt_cc) or ($opt_cflags) or ($opt_cxxflags) or ($opt_cxx);
$ENV{MYSQL_BUILD_CC}=$opt_cc if ($opt_cc);
$ENV{MYSQL_BUILD_CFLAGS}=$opt_cflags if ($opt_cflags);
$ENV{MYSQL_BUILD_CXXFLAGS}=$opt_cxxflags if ($opt_cxxflags);
$ENV{MYSQL_BUILD_CXX}=$opt_cxx if ($opt_cxx);

#
# Build the RPMs
#
$command= "$RPM";
$command.= " -v" if ($opt_verbose);
$command.= " -ba";
$command.= " --clean" if $opt_clean;
$command.= " $SPECDIR/";
$command.= basename($SPECFILE);
&logger("Building RPM.");
&run_command($command, "Error while building the RPMs!"); 

#
# Move the resulting RPMs into the pwd
#
$command= "mv";
$command.= " -v " if ($opt_verbose);
$command.= "$SRCRPMDIR/MySQL*$VERSION*.src.rpm $PWD";
&run_command($command, "Error moving source RPM!");

$command= "mv";
$command.= " -v " if ($opt_verbose);
$command.= "$RPMDIR/$RPMARCH/MySQL*$VERSION*.$RPMARCH.rpm $PWD";
&run_command($command, "Error moving binary RPMs!");

#
# Clean up
#
if ($opt_clean)
{
	&logger("Removing spec file and source package");
	unlink("$SPECDIR/" . basename($SPECFILE));
	unlink("$SOURCEDIR/$SOURCEFILE");
}

&logger("SUCCESS: RPM files successfully created.") if (!$opt_dry_run);
exit 0;

sub print_help
{
	my $message= $_[0];
	if ($message ne "")
	{
		print "\n";
		print "ERROR: $message\n\n}";
	}
	print <<EOF;

Usage: Do-rpm <options> <version>

Creates a binary RPM package out of a MySQL source distribution and moves the
resulting RPMs into the current directory.  <version> is the MySQL version
number (e.g. 4.0.11-gamma)

Options:

    --cc=<compiler>           Use <compiler> to compile C code
    --ccflags=<flags>         Use special C compiler flags
    --cxx=<compiler>          Use <compiler> to compile C++ code
    --cxxflags=<flags>        Use special C++ compiler flags
-c, --clean                   Clean up after the build
-t, --dry-run                 Dry run without executing
-h, --help                    Print this help
-l, --log[=<filename>]        Write a log file [to <filename>]
                              (default is "$LOGFILE")
-m, --mail=<address>          Mail a failure report to the given address
                              (and include a log file snippet, if logging
                              is enabled)
                              Note that the \@-Sign needs to be quoted!
                              Example: --mail=user\\\@domain.com
-v, --verbose                 Verbose execution

EOF
	exit 1;
}