Add coala.py

Moves the main function to 'coalib.coala' module to separate
functionality from command line invocation.
To support invocations for all platforms (Windows and Linux), this
commit creates both files, 'coala' and 'coala.py'. These only point to
the main function in 'coalib.coala'.

References #196.

coala

@@ -13,70 +13,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import sys
-from coalib.output.ClosableObject import ClosableObject
-
-from coalib.output.printers.ConsolePrinter import ConsolePrinter
-from coalib.misc.StringConstants import StringConstants
-from coalib.processes.SectionExecutor import SectionExecutor
-from coalib.settings.SectionManager import SectionManager
-
-
-from coalib.misc.i18n import _
-
+from coalib.coala import main
 
 if __name__ == "__main__":
-    log_printer = None
-    interactor = None
-    exitcode = 0
-    try:
-        did_nothing = True
-        yielded_results = False
-        sections, local_bears, global_bears, targets, interactor, log_printer \
-            = SectionManager().run()
-        for section_name in sections:
-            section = sections[section_name]
-            if not section.is_enabled(targets):
-                continue
-
-            yielded_results = yielded_results or SectionExecutor(
-                section=section,
-                global_bear_list=global_bears[section_name],
-                local_bear_list=local_bears[section_name],
-                interactor=interactor,
-                log_printer=log_printer).run()[0]
-            did_nothing = False
-
-        if did_nothing:
-            interactor.did_nothing()
-
-        if yielded_results:
-            exitcode = 1
-    except KeyboardInterrupt:  # Ctrl+C
-        print(_("Program terminated by user."))
-        exitcode = 130
-    except EOFError:  # Ctrl+D
-        print(_("Found EOF. Exiting gracefully."))
-    except SystemExit as e:
-        exitcode = e.code
-    except:
-        exception = sys.exc_info()[1]
-        UNKNOWN_ERROR = _("An unknown error occurred.") + " " + \
-                        StringConstants.THIS_IS_A_BUG
-        DESCRIPTION = _("During execution of coala an exception was raised. "
-                        "This should never happen. When asked for, the "
-                        "following information may help investigating:")
-
-        if log_printer is None:
-            log_printer = ConsolePrinter()
-
-        log_printer.log_exception(UNKNOWN_ERROR + " " + DESCRIPTION,
-                                  exception)
-        exitcode = 255
-
-    if log_printer is not None and isinstance(log_printer, ClosableObject):
-        log_printer.close()
-    if interactor is not None and isinstance(interactor, ClosableObject):
-        interactor.close()
-
-    exit(exitcode)
+    main()

coala.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation, either version 3 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 Affero General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from coalib.coala import main
+
+if __name__ == "__main__":
+    main()

coalib/coala.py

@@ -0,0 +1,83 @@
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation, either version 3 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 Affero General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import sys
+from coalib.output.ClosableObject import ClosableObject
+
+from coalib.output.printers.ConsolePrinter import ConsolePrinter
+from coalib.misc.StringConstants import StringConstants
+from coalib.processes.SectionExecutor import SectionExecutor
+from coalib.settings.SectionManager import SectionManager
+
+from coalib.misc.i18n import _
+
+
+def main():
+    log_printer = None
+    interactor = None
+    exitcode = 0
+    try:
+        did_nothing = True
+        yielded_results = False
+        sections, local_bears, global_bears, targets, interactor, log_printer \
+            = SectionManager().run()
+        for section_name in sections:
+            section = sections[section_name]
+            if not section.is_enabled(targets):
+                continue
+
+            yielded_results = yielded_results or SectionExecutor(
+                section=section,
+                global_bear_list=global_bears[section_name],
+                local_bear_list=local_bears[section_name],
+                interactor=interactor,
+                log_printer=log_printer).run()[0]
+            did_nothing = False
+
+        if did_nothing:
+            interactor.did_nothing()
+
+        if yielded_results:
+            exitcode = 1
+    except KeyboardInterrupt:  # Ctrl+C
+        print(_("Program terminated by user."))
+        exitcode = 130
+    except EOFError:  # Ctrl+D
+        print(_("Found EOF. Exiting gracefully."))
+    except SystemExit as e:
+        exitcode = e.code
+    except:
+        exception = sys.exc_info()[1]
+        UNKNOWN_ERROR = _("An unknown error occurred.") + " " + \
+                        StringConstants.THIS_IS_A_BUG
+        DESCRIPTION = _("During execution of coala an exception was raised. "
+                        "This should never happen. When asked for, the "
+                        "following information may help investigating:")
+
+        if log_printer is None:
+            log_printer = ConsolePrinter()
+
+        log_printer.log_exception(UNKNOWN_ERROR + " " + DESCRIPTION,
+                                  exception)
+        exitcode = 255
+
+    if log_printer is not None and isinstance(log_printer, ClosableObject):
+        log_printer.close()
+    if interactor is not None and isinstance(interactor, ClosableObject):
+        interactor.close()
+
+    exit(exitcode)
+
+
+if __name__ == "__main__":
+    main()

setup.py

@@ -14,7 +14,7 @@
           maintainer='Lasse Schuirmann, Fabian Neuschmidt',
           maintainer_email='lasse.schuirmann@gmail.com, fabian@neuschmidt.de',
           url='http://coala.schuirmann.net/',
-          scripts=['coala'],
+          scripts=['coala.py', 'coala'],
           packages=['bears',
                     'bears.codeclone_detection',
                     'bears.misc',