Source/cmake/ninja-wrapper

#!/usr/bin/perl
use strict;
use warnings;
use Cwd qw(getcwd);
use File::Path qw(make_path);

chomp(my $ninja = `which ninja 2>/dev/null` || `xcrun -f ninja`);

# CMake configuration
if (grep({ /^-t/ || /^--version$/ } @ARGV)) {
    exec($ninja, @ARGV);
}

# CMake try_compile/check_*
if (getcwd() =~ m{/CMakeFiles/}) {
    exec($ninja, @ARGV);
}

# Real compilation
my $bundlePolicy = $ENV{WK_UNIFIED_SOURCES_BUNDLE_POLICY};
if (!defined($bundlePolicy)) {
    my $dryRun = `$ninja -n @ARGV 2>&1`;
    my ($totalCommands) = $dryRun =~ m{/(\d+)\]};

    # No-op build
    if (!defined($totalCommands)) {
        print($dryRun);
        exit($? >> 8);
    }

    if ($dryRun =~ /\bRe-running CMake\b/) {
        $bundlePolicy = "Bundle";
    } elsif ($totalCommands > 8) {
        $bundlePolicy = "Bundle";
    } else {
        $bundlePolicy = "NoBundle";
    }

    $ENV{WK_UNIFIED_SOURCES_BUNDLE_POLICY} = $bundlePolicy;
}

# Record the bundle policy for inspection; nothing reads this file.
make_path("DerivedSources");
if (open(my $fh, '>', "DerivedSources/unified-sources-bundle-policy")) {
    print($fh $bundlePolicy);
    close($fh);
}

print('ninja: Entering directory `' . getcwd() . "'\n");
exec('/usr/bin/caffeinate', '-i', $ninja, @ARGV);