we have to disable dh_usrlocal

[auto-debuild.git] / auto_debuild.py

diff --git a/auto_debuild.py b/auto_debuild.py
index 36cef6db343c3806c39cea22e459621f1b570e45..a964b657695a54a49ce798d6cffaee824d8cc8cc 100755 (executable)
--- a/auto_debuild.py
+++ b/auto_debuild.py
@@ -1,176 +1,402 @@
-#!/usr/bin/python
-import os, stat, time, subprocess, sys
+#!/usr/bin/env python3
+# auto-debuild - Automatic Generation of Debian Packages
+# Copyright (C) 2012 Ralf Jung <post@ralfj.de>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# 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, multiprocessing

 from collections import OrderedDict
 
 from collections import OrderedDict
 

+# a dict with some useful additional getters which can convert types and handle one-element lists like their single member
+class ConfigDict(dict):
+       def getstr(self, name, default = None):
+               if not name in self: return default
+               val = self[name]
+               if isinstance(val, list):
+                       if len(val) != 1: raise Exception('%s is a list, but it should not' % name)
+                       return val[0]
+               else:
+                       return val
+       
+       def getint(self, name, default = None):
+               return int(self.getstr(name, default))
+       
+       def getbool(self, name, default = None):
+               val = self.getstr(name, default)
+               if isinstance(val, bool): return val # already a bool
+               return val.lower() in ('true', 'yes', 'on', '1')
+
+# create a safe-to-call shell command from the array
+def safeCall(*args):
+       res = ""
+       for arg in args:
+               assert arg.find("'") < 0 # ' is not supported
+               if len(res): res += " "
+               res += "'"+arg+"'"
+       return res
+
+# Load a section-less config file: maps parameter names to space-separated lists of strings (with shell quotation)
+# Lines starting with spaces are continuation lines
+def loadConfigFile(file):
+       # read config file
+       linenr = 0
+       with open(file) as file:
+               result = ConfigDict()
+               curKey = None
+               for line in file:
+                       linenr += 1
+                       isCont = len(line) and line[0].isspace() # remember if we were a continuation line
+                       if isCont and curKey is None:
+                               raise Exception("Invalid config, line %d: Starting with continuation line" % linenr)
+                       line = line.strip()
+                       if not len(line) or line.startswith("#"): continue # skip empty and comment lines
+                       try:
+                               if isCont:
+                                       # continuation line
+                                       result[curKey] += shlex.split(line)
+                               else:
+                                       # option line
+                                       pos = line.index("=") # will raise exception when substring is not found
+                                       curKey = line[:pos].strip()
+                                       result[curKey] = shlex.split(line[pos+1:]) # shlex.split also strips
+                       except Exception:
+                               raise Exception("Invalid config, line %d: Error parsing line (quoting issue?)" % linenr)
+       # add some convencience get functions
+       return result
+
+# representation of a build system
+class BuildSystem:
+       def __init__(self, ruleMaker, buildDepends = [], binaryDepends = []):
+               self.ruleMaker = ruleMaker
+               self.buildDepends = buildDepends
+               self.binaryDepends = binaryDepends
+

 # abstract representation of rules file
 class RulesFile:
        def __init__(self):
 # abstract representation of rules file
 class RulesFile:
        def __init__(self):

-               self.env = []
+               self.env = {}

                self.dh = []
                self.dh = []

+               self.dhWith = set()

                self.rules = OrderedDict()
        
                self.rules = OrderedDict()
        

+       def env2str(self):
+               res = ""
+               for name in self.env: # we rely on the name being sane (i.e., no special characters)
+                       val = self.env[name]
+                       assert val.find("'") < 0 # ' is not supported
+                       if len(res): res += " "
+                       res += name+"='"+val+"'"
+               return res
+

        def write(self, f):
        def write(self, f):

-               print >>f, "#!/usr/bin/make -f"
-               print >>f, ""
-               print >>f, "%:"
-               print >>f, '\t'+' '.join(self.env)+' dh $@',' '.join(self.dh)
+               print("#!/usr/bin/make -f", file=f)
+               print(file=f)
+               print("%:", file=f)
+               # write proper dh call
+               dh = self.dh
+               if self.dhWith:
+                       dh.append('--with='+','.join(self.dhWith))
+               print('\t'+self.env2str()+' dh $@ '+safeCall(*dh), file=f)
+               # write remaining rules

                for rule in self.rules:
                for rule in self.rules:

-                       print >>f, ""
-                       print >>f, "override_dh_"+rule+":"
+                       print(file=f)
+                       print("override_dh_"+rule+":", file=f)

                        for line in self.rules[rule]:
                        for line in self.rules[rule]:

-                               print >>f, "\t"+line
+                               print("\t"+line, file=f)

 
 

-# build-system specific part of rules file
-def cmakeRules(config):
-       r = RulesFile()
-       r.dh += ["--buildsystem=cmake", "--builddirectory=build.dir"] # dh parameters: "build" is not a good idea, as that's also the name of a target...
+# rule-makers
+def cmakeRules(r, config):
+       buildDir = config.getstr('buildDir', 'build')
+       srcDir = os.getcwd()
+       r.dh += ["--buildsystem=cmake", "--builddirectory="+buildDir] # dh parameters

        r.rules['auto_configure'] = [
        r.rules['auto_configure'] = [

-               'mkdir -p build.dir',
-               "cd build.dir && cmake .. -DCMAKE_INSTALL_PREFIX=/usr "+' '.join(config.get('cmakeParameters', []))
+               safeCall("mkdir", "-p", buildDir),
+               safeCall("cd", buildDir) + " && " +
+                 safeCall("cmake", srcDir, "-DCMAKE_INSTALL_PREFIX=/usr", *config.get('cmakeParameters', []))

        ]
        ]

-       r.rules['auto_clean'] = ['rm -f build.dir/CMakeCache.txt'] # clean old cmake cache
-       return r
+       r.rules['auto_clean'] = [safeCall('rm', '-f', os.path.join(buildDir, 'CMakeCache.txt'))] # clean old cmake cache

 
 

-def automakeRules(config):
-       r = RulesFile()
-       r.dh += ["--buildsystem=autoconf"]
+def automakeRules(r, config):
+       buildDir = config.getstr('buildDir', 'build')
+       srcDir = os.getcwd()
+       # "build" is what we are building *on*, and "host" is what we are building *for* (and GNU is weird...)
+       # also, we don't really support cross-building... ;-) (to do so, we'd have to write shell code that checks whether BUILD_GNU_TYPE
+       #  and HOST_GNU_TYPE are equal, and if they are not, add a --host parameter)
+       r.dh += ["--buildsystem=autoconf", "--builddirectory="+config.getstr('buildDir')]

        r.rules['auto_configure'] = [
        r.rules['auto_configure'] = [

+        (safeCall(*config['autogen']) + " && " if 'autogen' in config else '') +
+               safeCall("mkdir", "-p", buildDir),
+               safeCall("cd", buildDir) + " && " +

                'BUILD_TYPE=$$(dpkg-architecture -qDEB_BUILD_GNU_TYPE) && ' + # doing the expansion beforehand ensures that we cancel if it fails
                'BUILD_TYPE=$$(dpkg-architecture -qDEB_BUILD_GNU_TYPE) && ' + # doing the expansion beforehand ensures that we cancel if it fails

-               'MULTIARCH=$$(dpkg-architecture -qDEB_BUILD_MULTIARCH) && '+
-                       './configure --build=$$BUILD_TYPE ' +
-                       '--prefix=/usr --includedir=/usr/include --mandir=/usr/share/man --infodir=/usr/share/info ' +
+               'MULTIARCH=$$(dpkg-architecture -qDEB_HOST_MULTIARCH) && '+
+               safeCall(srcDir+"/configure") +
+                       ' --build=$$BUILD_TYPE '+ # do the escape manually here so we can use the variables (there's no user-controlled string in here anyway)
+                       '--prefix=/usr --includedir=/usr/include --mandir=/usr/share/man --infodir=/usr/share/info '+

                        '--libdir=/usr/lib/$$MULTIARCH --libexecdir=/usr/lib/$$MULTIARCH '+
                        '--libdir=/usr/lib/$$MULTIARCH --libexecdir=/usr/lib/$$MULTIARCH '+

-                       '--sysconfdir=/etc --localstatedir=/var ' +
-                       ' '.join(config.get('automakeParameters', []))
+                       safeCall('--docdir=/usr/share/doc/'+config['binaryName'], '--sysconfdir=/etc', '--localstatedir=/var', *config.get('automakeParameters', []))

        ]
        ]

-       r.rules['auto_clean'] = ['rm -f config.status'] # do not re-use old configuration
+       r.rules['auto_clean'] = [safeCall("rm", "-f", "--", buildDir+"/config.status")] # do not re-use old configuration
+
+def makefileRules(r, config):
+       r.dh += ["--buildsystem=makefile"]
+       r.rules['auto_configure'] = []
+
+def noneRules(r, config):
+       r.dh += ["--buildsystem=makefile"] # makefile does the least possible harm
+       r.rules['auto_configure'] = []
+       r.rules['auto_build'] = []
+       r.rules['auto_clean'] = []

        return r
 
        return r
 

+# build systems
+buildSystems = {
+       'cmake': BuildSystem(cmakeRules, ["cmake"]),
+       'automake': BuildSystem(automakeRules),
+       'makefile': BuildSystem(makefileRules),
+       'none': BuildSystem(noneRules),
+}
+

 # utility functions
 def commandInBuildEnv(config, command):
 # utility functions
 def commandInBuildEnv(config, command):

-       schroot = config.get('schroot')
+       schroot = config.getstr('schroot')

        if schroot is not None: command = ['schroot', '-c', schroot, '--'] + command
        return command
 
 def getArchitecture(config):
        if schroot is not None: command = ['schroot', '-c', schroot, '--'] + command
        return command
 
 def getArchitecture(config):

-       cmd = commandInBuildEnv(config, ['dpkg-architecture', '-qDEB_BUILD_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")
-       return res[0:len(res)-1] # chop of the \n at the end
+       cmd = commandInBuildEnv(config, ['dpkg-architecture', '-qDEB_HOST_ARCH'])
+       output = subprocess.check_output(cmd)
+       return output.decode('utf-8').strip('\n') # chop off the \n at the end

 
 

-def writeDebList(list):
-       return ', '.join(list)
+def writeDependency(f, name, list):
+       if len(list):
+               print(name+": "+', '.join(list), file=f)

 
 # actual work functions
 
 # actual work functions

+def deleteDebianFolder():
+       if os.path.islink('debian'):
+               target = os.readlink('debian')
+               if os.path.exists(target):
+                       shutil.rmtree(target)
+               os.remove('debian')
+       elif os.path.exists('debian'):
+               shutil.rmtree('debian')
+

 def createDebianFiles(config):
 def createDebianFiles(config):

-       sourceName = config['sourceName']
-       binaryName = config.get('binaryName', sourceName+'-local')
-       name = config.get('name', os.getlogin())
-       email = config.get('email', os.getlogin()+'@'+os.uname()[1]) # user@hostname
-       debDir = os.path.expanduser(config['debDir'])
-       buildSystem = config['buildSystem']
-       version = config['version']
-       dbgPackage = config.get('dbgPackage', False)
-       packageArchitecture = config.get('architecture', 'any')
+       if not isinstance(config, ConfigDict):
+               config = ConfigDict(config)
+       sourceName = config.getstr('sourceName')
+       binaryName = config.getstr('binaryName', sourceName+'-local')
+       config['binaryName'] = binaryName # make it usable by build systems
+       name = config.getstr('name', os.getenv('USER')) # os.getlogin() fails in minimal chroots
+       email = config.getstr('email', os.getenv('USER')+'@'+os.uname()[1]) # user@hostname
+       debDir = os.path.expanduser(config.getstr('debDir'))
+       buildSystem = buildSystems[config.getstr('buildSystem')] # get the data immediately
+       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
+       parallelJobs = config.getint('parallelJobs', multiprocessing.cpu_count())
+       packageArchitecture = config.getstr('architecture', 'any')
+       withPython2 = config.getbool('withPython2', False)
+       withSIP = config.getbool('withSIP', False)
+       withAutoreconf = config.getbool('withAutoreconf', False)
+       # add some build dependencies (a bit hacky adding it to the build system...)
+       if withSIP:
+               withPython2 = True
+               buildSystem.buildDepends.append("python-sip")
+               buildSystem.binaryDepends.append("${sip:Depends}")
+       if withPython2:
+               buildSystem.buildDepends.append("python")
+               buildSystem.binaryDepends.append("${python:Depends}")
+       if withAutoreconf:
+               buildSystem.buildDepends.append("dh-autoreconf")

        # we return the list of files generated, so we need to know the architecture
        arch = getArchitecture(config)
        files = []
        # we return the list of files generated, so we need to know the architecture
        arch = getArchitecture(config)
        files = []

+       # create folders
+       if os.path.exists('debian') or os.path.islink('debian'): raise Exception('debian folder already exists?')
+       if config.getbool('useTmp', True):
+               tempdir = tempfile.mkdtemp(prefix='auto-debuild-')
+               os.symlink(tempdir, 'debian')
+       else:
+               os.mkdir('debian')
+       if not os.path.exists(debDir): os.makedirs(debDir)

        # source format file
        # source format file

-       if not os.path.exists('debian/source'): os.mkdir('debian/source')
+       os.mkdir('debian/source')

        with open('debian/source/format', 'w') as f:
        with open('debian/source/format', 'w') as f:

-               print >>f, "3.0 (native)"
+               print("3.0 (native)", file=f)

        # compat file
        with open('debian/compat', 'w') as f:
        # compat file
        with open('debian/compat', 'w') as f:

-               print >>f, "9"
+               print("9", file=f)

        # copyright file
        with open('debian/copyright', 'w') as f:
        # copyright file
        with open('debian/copyright', 'w') as f:

-               print >>f, "Auto-generated by auto-debuild, not suited for distribution"
+               print("Auto-generated by auto-debuild, not suited for distribution", file=f)

        # changelog file
        with open('debian/changelog', 'w') as f:
        # changelog file
        with open('debian/changelog', 'w') as f:

-               print >>f, sourceName,"("+version+")","UNRELEASED; urgency=low"
-               print >>f, ""
-               print >>f, "  * Auto-generated by auto-debuild"
-               print >>f, ""
-               print >>f, " --",name,"<"+email+">  "+time.strftime('%a, %d %b %Y %H:%M:%S %z')
+               print(sourceName,"("+fullVersion+")","UNRELEASED; urgency=low", file=f)
+               print(file=f)
+               print("  * Auto-generated by auto-debuild", file=f)
+               print(file=f)
+               print(" --",name,"<"+email+">  "+time.strftime('%a, %d %b %Y %H:%M:%S %z'), file=f)

        # control file
        with open('debian/control', 'w') as f:
        # control file
        with open('debian/control', 'w') as f:

-               print >>f, "Source:",sourceName
-               print >>f, "Section:",config.get('section', 'misc')
-               print >>f, "Priority: extra"
-               print >>f, "Maintainer: %s <%s>" % (name, email)
-               print >>f, "Build-Depends:",writeDebList(["debhelper (>= 9)"] + config.get('buildDepends', []))
-               print >>f, "Standards-Version: 3.9.3"
-               print >>f, ""
-               print >>f, "Package:",binaryName
-               print >>f, "Architecture:",packageArchitecture
-               if 'binaryPreDepends' in config:
-                       print >>f, "Pre-Depends:",writeDebList(config['binaryPreDepends'])
-               print >>f, "Depends:",writeDebList(["${shlibs:Depends}", "${misc:Depends}"] + config.get('binaryDepends', []))
-               print >>f, "Provides:",writeDebList(config.get('binaryProvides', [sourceName]))
-               print >>f, "Description:",sourceName,"(auto-debuild)"
-               print >>f, " Package auto-generated by auto-debuild."
-               files.append(os.path.join(debDir, "%s_%s_%s.deb" % (binaryName, version, arch)))
-               if dbgPackage:
-                       print >>f, ""
-                       print >>f, "Package:",binaryName+"-dbg"
-                       print >>f, "Architecture:",packageArchitecture
-                       print >>f, "Depends:",writeDebList(["${misc:Depends}", binaryName+" (= ${binary:Version})"])
-                       print >>f, "Description:",sourceName,"debug smbols (auto-debuild)"
-                       print >>f, " Package containing debug symbols for "+sourceName+", auto-generated by auto-debuild."
-                       files.append(os.path.join(debDir, "%s-dbg_%s_%s.deb" % (binaryName, version, arch)))
+               # source package
+               print("Source:",sourceName, file=f)
+               print("Section:",config.getstr('section', 'misc'), file=f)
+               print("Priority: extra", file=f)
+               print("Maintainer: %s <%s>" % (name, email), file=f)
+               writeDependency(f, 'Build-Depends', ["debhelper (>= 9)"] + buildSystem.buildDepends + config.get('buildDepends', []))
+               print("Standards-Version: 3.9.3", file=f)
+               # main binary package
+               print(file=f)
+               print("Package:",binaryName, file=f)
+               print("Architecture:",packageArchitecture, file=f)
+               if 'binaryMultiArch' in config:
+                       print("Multi-Arch:",config.getstr('binaryMultiArch'), file=f)
+               writeDependency(f, "Pre-Depends", ["${misc:Pre-Depends}"] + config.get('binaryPreDepends', []))
+               writeDependency(f, "Depends", ["${shlibs:Depends}", "${misc:Depends}"] + buildSystem.binaryDepends +
+                       config.get('binaryDepends', []))
+               writeDependency(f, "Recommends", config.get('binaryRecommends', []))
+               writeDependency(f, "Provides", config.get('binaryProvides', [sourceName]))
+               writeDependency(f, "Conflicts", config.get('binaryConflicts', []))
+               writeDependency(f, "Breaks", config.get('binaryBreaks', []) + config.get('binaryBreaksReplaces', []))
+               writeDependency(f, "Replaces", config.get('binaryReplaces', []) + config.get('binaryBreaksReplaces', []))
+               print("Description:",sourceName,"(auto-debuild)", file=f)
+               print(" Package auto-generated by auto-debuild.", file=f)
+               files.append(os.path.join(debDir, "{}_{}_{}.deb".format(binaryName, version, arch)))
+               files.append(os.path.join(debDir, "{}-dbgsym_{}_{}.deb".format(binaryName, version, arch)))
+               # shim packages
+               for shim in config.get('binaryShims', []):
+                       print(file=f)
+                       print("Package:",shim, file=f)
+                       print("Section:",config.getstr('section', 'misc'), file=f)
+                       print("Priority: extra", file=f)
+                       print("Architecture:",packageArchitecture, file=f)
+                       writeDependency(f, "Depends", ["${misc:Depends}", binaryName+" (= ${binary:Version})"])
+                       print("Description:",sourceName,"shim for",shim,"(auto-debuild)", file=f)
+                       print(" Package pretending to be "+shim+", auto-generated by auto-debuild.", file=f)
+                       files.append(os.path.join(debDir, "{}_{}_{}.deb".format(shim, version, arch)))
+       # install file
+       with open('debian/'+binaryName+'.install', 'w') as f:
+               for line in config.get('binaryInstallFiles', []):
+                       if line.startswith('/'): # a file from within the package, not from the source tree
+                               line = 'debian/'+binaryName+line
+                       print(line, file=f)
+       # maintainer scripts for alternatives
+       if 'alternatives' in config:
+               with open('debian/'+binaryName+'.postinst', 'w') as f:
+                       print("#!/bin/sh", file=f)
+                       print("set -e", file=f)
+                       print('if [ "$1" = "configure" ]; then', file=f)
+                       for alternative in config.get('alternatives'):
+                               alternative = shlex.split(alternative)
+                               print(safeCall('update-alternatives', '--install', alternative[0], alternative[1], alternative[2], alternative[3]), file=f)
+                       print('fi', file=f)
+                       print(file=f)
+                       print('#DEBHELPER#', file=f)
+                       print(file=f)
+                       print('exit 0', file=f)
+               with open('debian/'+binaryName+'.prerm', 'w') as f:
+                       print("#!/bin/sh", file=f)
+                       print("set -e", file=f)
+                       print('if [ "$1" = "remove" ]; then', file=f)
+                       for alternative in config.get('alternatives'):
+                               alternative = shlex.split(alternative)
+                               print(safeCall('update-alternatives', '--remove', alternative[1], alternative[2]), file=f)
+                       print('fi', file=f)
+                       print(file=f)
+                       print('#DEBHELPER#', file=f)
+                       print(file=f)
+                       print('exit 0', file=f)

        # rules file: build system specific
        with open('debian/rules', 'w') as f:
        # rules file: build system specific
        with open('debian/rules', 'w') as f:

-               # get rule file for build system: may only touch auto_config and auto_clean rules and the dh options
-               if buildSystem == 'cmake':
-                       r = cmakeRules(config)
-               elif buildSystem == 'automake':
-                       r = automakeRules(config)
-               else:
-                       raise Exception("Invalid build system "+buildSystem)
+               # pre-fill rule file with our global defaults
+               r = RulesFile()
+               r.rules['auto_test'] = []
+               r.rules['auto_install'] = [safeCall('dh_auto_install', '--destdir=debian/'+binaryName)] # install everything into the binary package
+               r.rules['auto_configure'] = ['dh_auto_configure'] # make sure there is an override (we may just append to it later)
+               r.rules['usrlocal'] = [] # we *do* want to install things in /usr/local
+               # patch rule file for build system: may only touch auto_* rules and the dh options
+               buildSystem.ruleMaker(r, config)

                # global rules
                # global rules

-               r.env += ["DEB_BUILD_OPTIONS='parallel=2'"]
-               if not dbgPackage: r.env += ["DEB_CFLAGS_APPEND='-g0'", "DEB_CXXFLAGS_APPEND='-g0'"] # disable debug information
+               r.env["DEB_BUILD_OPTIONS"] = 'parallel='+str(parallelJobs)

                r.dh += ['--parallel']
                r.dh += ['--parallel']

-               r.rules['builddeb'] = ['dh_builddeb --destdir='+debDir] # passing this gobally to dh results in weird problems (like stuff being installed there, and not in the package...)
-               r.rules['auto_test'] = []
-               r.rules['auto_install'] = ['dh_auto_install --destdir=debian/'+binaryName] # install everything into the binary package
-               # for debug packages
-               if dbgPackage:
-                       r.rules['strip'] = ['dh_strip --dbg-package='+binaryName+"-dbg"] # put debug files in appropriate package
-                       r.rules['installdocs'] = ['dh_installdocs --link-doc='+binaryName] # make the doc folder of the dbg package a symlink
+               if withPython2:
+                       r.dhWith.add('python2')
+                       r.rules['python2'] = ['dh_python2 --no-guessing-versions --no-shebang-rewrite']
+                       if withSIP:
+                               r.rules['python2'].append(safeCall('dh_sip', '-p'+binaryName))
+               if withAutoreconf:
+                       r.dhWith.add('autoreconf')
+               r.rules['builddeb'] = [safeCall('dh_builddeb', "--destdir="+debDir)] # passing this gobally to dh results in weird problems (like stuff being installed there, and not in the package...)
+               # installation rule
+               if 'binarySkipFiles' in config:
+                       r.rules['auto_install'].append(safeCall('cd', 'debian/'+binaryName) + " && " + safeCall('rm', *config.get('binarySkipFiles')))
+               # make the doc folder of the other packages a symlink (dbg, shims)
+               r.rules['installdocs'] = [safeCall('dh_installdocs', '--link-doc='+binaryName)]
+               # wait after configuration?
+               if config.getbool('waitAfterConfig', False):
+                       r.rules['auto_configure'].append("@"+safeCall('read', '-p', 'Configuration done. Hit "Enter" to build the package. ', 'DUMMY_VAR')) # if we run in dash, we need to tell it which variable to use for the result...

                # dump it to a file
                r.write(f)
        mode = os.stat('debian/rules').st_mode
        os.chmod('debian/rules', mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)
                # dump it to a file
                r.write(f)
        mode = os.stat('debian/rules').st_mode
        os.chmod('debian/rules', mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH)

-       # return list of files affected
+       # return list of files that will be created

        return files
 
 def buildDebianPackage(config):
        return files
 
 def buildDebianPackage(config):

-       commands = ['dpkg-checkbuilddeps', 'debian/rules clean', 'debian/rules build', 'fakeroot debian/rules binary', 'debian/rules clean']
-       command = ['bash', '-c', ' && '.join(commands)]
+       if not isinstance(config, ConfigDict):
+               config = ConfigDict(config)
+       commands = ['dpkg-checkbuilddeps', 'debian/rules clean', 'debian/rules build', 'fakeroot debian/rules binary']
+       command = ['bash', '-c', ' && '.join(commands)] # make it all one command, so we don't have to open and close the chroot too often

        subprocess.check_call(commandInBuildEnv(config, command))
        subprocess.check_call(commandInBuildEnv(config, command))

+       deleteDebianFolder() # cleanup: the debian folder only contains what we just created

 
 

-# all at once
-def createAndInstall(config, overwriteCheck = False):
-       # generate debian files
-       files = createDebianFiles(config)
-       # check if a file is overwritten
-       if overwriteCheck:
-               for file in files:
-                       if os.path.exists(file):
-                               if raw_input("Do you want to overwrite %s (y/N)? " % file).lower() != "y":
-                                       sys.exit(1)
-       # run compilation
-       buildDebianPackage(config)
-       # install files
-       subprocess.check_call(['sudo', 'dpkg', '--install'] + files)
-
+###################################################################

 # if we are called directly as script
 if __name__ == "__main__":
 # if we are called directly as script
 if __name__ == "__main__":

-       # get config
-       import imp
-       config = imp.load_source('config', 'debian/auto-debuild.conf').__dict__
-       os.remove('debian/auto-debuild.confc')
-       # and go for it
-       createAndInstall(config, overwriteCheck=True)
+       try:
+               # read command-line arguments
+               parser = argparse.ArgumentParser(description='Automatic Generation of Debian Packages')
+               parser.add_argument("-w", "--wait-after-config",
+                                                       action="store_true", dest="wait_after_config",
+                                                       help="Wait for user confirmation after configuration is finished")
+               args = parser.parse_args()
+               # get config
+               config = loadConfigFile('auto-debuild.conf')
+               config['waitAfterConfig'] = args.wait_after_config
+               # generate debian files
+               if os.path.exists('debian') or os.path.islink('debian'):
+                       if input("A debian folder already exists, do you want to remove it and whatever it links to (y/N)? ").lower() != "y":
+                               sys.exit(1)
+                       deleteDebianFolder()
+               files = createDebianFiles(config)
+               # check if a file is overwritten
+               overwritten_files = list(filter(lambda file: os.path.exists(file), files))
+               if overwritten_files:
+                       if input("Do you want to overwrite {} (y/N)? ".format(', '.join(overwritten_files))).lower() != "y":
+                               sys.exit(1)
+               # run compilation
+               buildDebianPackage(config)
+               # install files
+               print("Installing created deb files...")
+               subprocess.check_call(['sudo', 'dpkg', '--install'] + files)
+       except (subprocess.CalledProcessError, KeyboardInterrupt) as e: # for some exceptions, a stackrace is usually pointless
+               print(file=sys.stderr)
+               print(file=sys.stderr)
+               if isinstance(e, KeyboardInterrupt): # str(e) would be the empty string
+                       print("Interruped by user", file=sys.stderr)
+               else:
+                       print("Error during package creation: %s" % str(e), file=sys.stderr)
+               print(file=sys.stderr)
+               sys.exit(1)