package/package_manager: multiprocess_exec -> multiprocess_launch

After this replacement, the parent exception handling works so we don't
need subprocess wrapping with bb.error in the underlying functions.

The underlying contexts also have better module handling so the imports
can be cleaned up.

(From OE-Core rev: aa8260adf53139d776a2affe6118d28b295c1fab)

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

meta/classes/package.bbclass

@@ -1105,7 +1105,7 @@ python split_and_strip_files () {
         for f in kernmods:
             sfiles.append((f, 16, strip))
 
-        oe.utils.multiprocess_exec(sfiles, oe.package.runstrip)
+        oe.utils.multiprocess_launch(oe.package.runstrip, sfiles, d)
 
     #
     # End of strip
@@ -1541,7 +1541,7 @@ python package_do_filedeps() {
         for files in chunks(pkgfiles[pkg], 100):
             pkglist.append((pkg, files, rpmdeps, pkgdest))
 
-    processed = oe.utils.multiprocess_exec( pkglist, oe.package.filedeprunner)
+    processed = oe.utils.multiprocess_launch(oe.package.filedeprunner, pkglist, d)
 
     provides_files = {}
     requires_files = {}

meta/lib/oe/package.py

@@ -1,3 +1,4 @@
+import stat
 import mmap
 import subprocess
 
@@ -11,8 +12,6 @@ def runstrip(arg):
     # 8 - shared library
     # 16 - kernel module
 
-    import stat, subprocess
-
     (file, elftype, strip) = arg
 
     newmode = None
@@ -37,16 +36,11 @@ def runstrip(arg):
     stripcmd.append(file)
     bb.debug(1, "runstrip: %s" % stripcmd)
 
-    try:
-        output = subprocess.check_output(stripcmd, stderr=subprocess.STDOUT)
-    except subprocess.CalledProcessError as e:
-        bb.error("runstrip: '%s' strip command failed with %s (%s)" % (stripcmd, e.returncode, e.output))
+    output = subprocess.check_output(stripcmd, stderr=subprocess.STDOUT)
 
     if newmode:
         os.chmod(file, origmode)
 
-    return
-
 # Detect .ko module by searching for "vermagic=" string
 def is_kernel_module(path):
     with open(path) as f:
@@ -164,8 +158,7 @@ def strip_execs(pn, dstdir, strip_cmd, libdir, base_libdir, d, qa_already_stripp
         elf_file = int(elffiles[file])
         sfiles.append((file, elf_file, strip_cmd))
 
-    oe.utils.multiprocess_exec(sfiles, runstrip)
-
+    oe.utils.multiprocess_launch(runstrip, sfiles, d)
 
 
 def file_translate(file):

meta/lib/oe/package_manager.py

@@ -3,7 +3,6 @@ import os
 import glob
 import subprocess
 import shutil
-import multiprocessing
 import re
 import collections
 import bb
@@ -177,7 +176,7 @@ class OpkgIndexer(Indexer):
             bb.note("There are no packages in %s!" % self.deploy_dir)
             return
 
-        oe.utils.multiprocess_exec(index_cmds, create_index)
+        oe.utils.multiprocess_launch(create_index, index_cmds, self.d)
 
         if signer:
             feed_sig_type = self.d.getVar('PACKAGE_FEED_GPG_SIGNATURE_TYPE')
@@ -258,7 +257,7 @@ class DpkgIndexer(Indexer):
             bb.note("There are no packages in %s" % self.deploy_dir)
             return
 
-        oe.utils.multiprocess_exec(index_cmds, create_index)
+        oe.utils.multiprocess_launch(create_index, index_cmds, self.d)
         if self.d.getVar('PACKAGE_FEED_SIGN') == '1':
             raise NotImplementedError('Package feed signing not implementd for dpkg')