Auto-determine the number of parallel jobs to use

[auto-debuild.git] / auto_debuild.py

diff --git a/auto_debuild.py b/auto_debuild.py
index a7087985b285161ee58fa607045526e3aad0cde5..410d8489cd3118b5d5fd2e4cd0f79db5c06e43a9 100755 (executable)
--- a/auto_debuild.py
+++ b/auto_debuild.py
@@ -16,7 +16,7 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
-import os, shutil, stat, time, subprocess, sys, shlex, tempfile, argparse
+import os, shutil, stat, time, subprocess, sys, shlex, tempfile, argparse, multiprocessing
 from collections import OrderedDict
 
 # a dict with some useful additional getters which can convert types and handle one-element lists like their single member
@@ -177,9 +177,9 @@ def commandInBuildEnv(config, command):
 
 def getArchitecture(config):
        cmd = commandInBuildEnv(config, ['dpkg-architecture', '-qDEB_HOST_ARCH'])
-       p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
-       res = p.communicate()[0] # get only stdout
-       if p.returncode != 0: raise Exception("Querying dpkg for the architecture failed")
+       with subprocess.Popen(cmd, stdout=subprocess.PIPE) as p:
+               res = p.communicate()[0] # get only stdout
+               if p.returncode != 0: raise Exception("Querying dpkg for the architecture failed")
        return res[0:len(res)-1] # chop of the \n at the end
 
 def writeDependency(f, name, list):
@@ -209,7 +209,7 @@ def createDebianFiles(config):
        version = config.getstr('version') # version name excluding epoch (used for filenames)
        fullVersion = str(config.getint('epoch'))+':'+version if 'epoch' in config else version # version name including epoch
        dbgPackage = config.getbool('dbgPackage', False)
-       parallelJobs = config.getint('parallelJobs', 2)
+       parallelJobs = config.getint('parallelJobs', multiprocessing.cpu_count()+1)
        packageArchitecture = config.getstr('architecture', 'any')
        withPython2 = config.getbool('withPython2', False)
        withSIP = config.getbool('withSIP', False)