package_ipk|deb: Use oe.utils.multiprocess_launch

The current code had broken exception handling due to the use of a
"traceback" variable as well as an import. Use the new library code
for this instead which reduces code duplication and has fixed/improved
exception handling.

The chdir code can be dropped since any directory changes are in other
processes now so there is no need for it here and the code no longer
changes directory.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 50 deletions

diff --git a/meta/classes/package_deb.bbclass b/meta/classes/package_deb.bbclass
index 2e8d17d3c7..6f81591653 100644
--- a/meta/classes/package_deb.bbclass
+++ b/meta/classes/package_deb.bbclass
@@ -41,32 +41,6 @@ def debian_arch_map(arch, tune):
     return arch
 
 python do_package_deb () {
-
-    import multiprocessing
-    import traceback
-
-    class DebianWritePkgProcess(multiprocessing.Process):
-        def __init__(self, *args, **kwargs):
-            multiprocessing.Process.__init__(self, *args, **kwargs)
-            self._pconn, self._cconn = multiprocessing.Pipe()
-            self._exception = None
-
-        def run(self):
-            try:
-                multiprocessing.Process.run(self)
-                self._cconn.send(None)
-            except Exception as e:
-                tb = traceback.format_exc()
-                self._cconn.send((e, tb))
-
-        @property
-        def exception(self):
-            if self._pconn.poll():
-                self._exception = self._pconn.recv()
-            return self._exception
-
-    oldcwd = os.getcwd()
-
     packages = d.getVar('PACKAGES')
     if not packages:
         bb.debug(1, "PACKAGES not defined, nothing to package")
@@ -76,30 +50,7 @@ python do_package_deb () {
     if os.access(os.path.join(tmpdir, "stamps", "DEB_PACKAGE_INDEX_CLEAN"),os.R_OK):
         os.unlink(os.path.join(tmpdir, "stamps", "DEB_PACKAGE_INDEX_CLEAN"))
 
-    max_process = int(d.getVar("BB_NUMBER_THREADS") or os.cpu_count() or 1)
-    launched = []
-    error = None
-    pkgs = packages.split()
-    while not error and pkgs:
-        if len(launched) < max_process:
-            p = DebianWritePkgProcess(target=deb_write_pkg, args=(pkgs.pop(), d))
-            p.start()
-            launched.append(p)
-        for q in launched:
-            # The finished processes are joined when calling is_alive()
-            if not q.is_alive():
-                launched.remove(q)
-            if q.exception:
-                error, traceback = q.exception
-                break
-
-    for p in launched:
-        p.join()
-
-    os.chdir(oldcwd)
-
-    if error:
-        raise error
+    oe.utils.multiprocess_launch(deb_write_pkg, packages.split(), d, extraargs=(d,))
 }
 do_package_deb[vardeps] += "deb_write_pkg"
 do_package_deb[vardepsexclude] = "BB_NUMBER_THREADS"