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-rw-r--r--Debian/Debhelper/Dh_Lib.pm42
1 files changed, 41 insertions, 1 deletions
diff --git a/Debian/Debhelper/Dh_Lib.pm b/Debian/Debhelper/Dh_Lib.pm
index 2d1934b..ebf7db7 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