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#!/usr/bin/perl -w
# usage:
# [somebody@somewhere ~/ipxe/src]$ ./util/diffsize.pl [<old rev> [<new rev>]]
# by default <old rev> is HEAD and <new rev> is the working tree
use strict;
-d "bin" or die "Please run me in the iPXE src directory\n";
mkdir ".sizes";
my($oldrev, $newrev);
my($oldname, $newname);
if (@ARGV) {
$oldname = shift;
} else {
$oldname = "HEAD";
}
if (@ARGV) {
$newname = shift;
} else {
$newrev = "tree" . time();
}
$oldrev = `git rev-parse $oldname`;
chomp $oldrev;
unless (defined $newrev) {
$newrev = `git rev-parse $newname`;
chomp $newrev;
}
sub calc_sizes($$) {
my($name, $rev) = @_;
my $output;
my $lastrev;
my $stashed = 0;
my $res = 0;
return if -e ".sizes/$rev.sizes";
if (defined $name) {
$output = `git stash`;
$stashed = 1 unless $output =~ /No local changes to save/;
$lastrev = `git name-rev --name-only HEAD`;
system("git checkout $name >/dev/null"); $res ||= $?;
}
system("make -j4 bin/ipxe.lkrn >/dev/null"); $res ||= $?;
system("make bin/ipxe.lkrn.sizes > .sizes/$rev.sizes"); $res ||= $?;
if (defined $name) {
system("git checkout $lastrev >/dev/null"); $res ||= $?;
system("git stash pop >/dev/null") if $stashed; $res ||= $?;
}
if ($res) {
unlink(".sizes/$rev.sizes");
die "Error making sizes file\n";
}
}
our %Sizes;
sub save_sizes($$) {
my($id, $rev) = @_;
my $file = ".sizes/$rev.sizes";
open SIZES, $file or die "opening $file: $!\n";
while (<SIZES>) {
my($text, $data, $bss, $total, $hex, $name) = split;
$name =~ s|bin/||; $name =~ s|\.o$||;
# Skip the header and totals lines
next if $total =~ /[a-z]/ or $name =~ /TOTALS/;
# Skip files named with dash, due to old Makefile bug
next if $name =~ /-/;
$Sizes{$name} = {old => 0, new => 0} unless exists $Sizes{$name};
$Sizes{$name}{$id} = $total;
}
}
calc_sizes($oldname, $oldrev);
calc_sizes($newname, $newrev);
save_sizes('old', $oldrev);
save_sizes('new', $newrev);
my $total = 0;
for (sort keys %Sizes) {
my $diff = $Sizes{$_}{new} - $Sizes{$_}{old};
if (abs($diff) >= 16) {
printf "%12s %+d\n", substr($_, 0, 12), $Sizes{$_}{new} - $Sizes{$_}{old};
}
$total += $diff;
}
printf " TOTAL: %+d\n", $total;
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