diff options
Diffstat (limited to 'Debian/Debhelper/Dh_Lib.pm')
| -rw-r--r-- | Debian/Debhelper/Dh_Lib.pm | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/Debian/Debhelper/Dh_Lib.pm b/Debian/Debhelper/Dh_Lib.pm index 2d1934be..ebf7db7e 100644 --- a/Debian/Debhelper/Dh_Lib.pm +++ b/Debian/Debhelper/Dh_Lib.pm @@ -16,7 +16,7 @@ use vars qw(@ISA @EXPORT %dh); &compat &addsubstvar &delsubstvar &excludefile &package_arch &is_udeb &udeb_filename &debhelper_script_subst &escape_shell &inhibit_log &load_log &write_log &dpkg_architecture_value - &sourcepackage); + &sourcepackage &get_make_jobserver_status); my $max_compat=7; @@ -205,6 +205,46 @@ sub _error_exitcode { } } +# A helper subroutine for detecting (based on MAKEFLAGS) if make jobserver +# is enabled, if it is available or MAKEFLAGS contains "jobs" option. +# It returns current status (jobserver, jobserver-unavailable or jobs-N where +# N is number of jobs, 0 if infinite) and MAKEFLAGS cleaned up from +# job control options. +sub get_make_jobserver_status { + my $jobsre = qr/(?:^|\s)(?:(?:-j\s*|--jobs(?:=|\s+))(\d+)?|--jobs)\b/; + my $status = ""; + my $makeflags; + + if (exists $ENV{MAKEFLAGS}) { + $makeflags = $ENV{MAKEFLAGS}; + if ($makeflags =~ /(?:^|\s)--jobserver-fds=(\d+)/) { + $status = "jobserver"; + if (!open(my $in, "<&", "$1")) { + # Job server is unavailable + $status .= "-unavailable"; + } + else { + close $in; + } + # Clean makeflags up + $makeflags =~ s/(?:^|\s)--jobserver-fds=\S+//g; + $makeflags =~ s/(?:^|\s)-j\b//g; + } + elsif (my @m = ($makeflags =~ /$jobsre/g)) { + # Job count is specified in MAKEFLAGS. Whenever make reads it, a new + # jobserver will be started. Job count returned is 0 if infinite. + $status = "jobs-" . (defined $m[$#m] ? $m[$#m] : "0"); + # Clean makeflags up from "jobs" option(s) + $makeflags =~ s/$jobsre//g; + } + } + if ($status) { + # MAKEFLAGS could be unset if it is empty + $makeflags = undef if $makeflags =~ /^\s*$/; + } + return wantarray ? ($status, $makeflags) : $status; +} + # Run a command that may have a huge number of arguments, like xargs does. # Pass in a reference to an array containing the arguments, and then other # parameters that are the command and any parameters that should be passed to |