Make the bash completion into a static file

Since we already generate the man pages automatically,
we can generate the bash completions too.
It is much faster and does not risk making any network requests.

fixes #194

tools/make_man.py

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
-# Copyright(C) 2010-2014 Laurent Bachelier
+# Copyright(C) 2010-2018 Laurent Bachelier
 #
 # This file is part of weboob.
 #
@@ -28,13 +28,14 @@ import re
 import sys
 import tempfile
 import time
-
 from datetime import datetime
-from weboob.tools.application.base import Application
+from textwrap import dedent
 
+from weboob.tools.application.base import Application
 
 BASE_PATH = os.path.join(os.path.dirname(__file__), os.pardir)
 DEST_DIR = 'man'
+COMP_PATH = 'tools/weboob_bash_completion'
 
 
 class ManpageHelpFormatter(optparse.HelpFormatter):
@@ -107,6 +108,7 @@ class ManpageHelpFormatter(optparse.HelpFormatter):
 def main():
     scripts_path = os.path.join(BASE_PATH, "scripts")
     files = os.listdir(scripts_path)
+    completions = dict()
 
     # Create a fake "scripts" modules to import the scripts into
     sys.modules["scripts"] = imp.new_module("scripts")
@@ -132,11 +134,12 @@ def main():
                     # Find the applications we can handle
                     for klass in script.__dict__.values():
                         if inspect.isclass(klass) and issubclass(klass, Application) and klass.VERSION:
-                            analyze_application(klass, fname)
+                            completions[fname] = analyze_application(klass, fname)
                 finally:
                     # Cleanup compiled files if needed
                     if (os.path.isfile(tmpfile + "c")):
                         os.unlink(tmpfile + "c")
+    write_completions(completions)
 
 
 def format_title(title):
@@ -241,5 +244,37 @@ For full copyright information see the COPYING file in the weboob package.
             manfile.write('%s\n' % line.lstrip().encode('utf-8'))
     print("wrote %s/%s.1" % (DEST_DIR, script_name))
 
+    return application._shell_completion_items()
+
+
+def write_completions(completions):
+    compscript = dedent('''
+    # Weboob completion for Bash (automatically generated by tools/make_man.sh)
+    #
+    # vim: filetype=sh expandtab softtabstop=4 shiftwidth=4
+    #
+    # This file is part of weboob.
+    #
+    # This script can be distributed under the same license as the
+    # weboob or bash packages.
+    ''')
+    for name, items in completions.items():
+        compscript += dedent('''
+        _weboob_{1}()
+        {{
+            local cur args
+
+            COMPREPLY=()
+            cur=${{COMP_WORDS[COMP_CWORD]}}
+            args="{2}"
+
+            COMPREPLY=( $(compgen -o default -W "${{args}}" -- "$cur" ) )
+        }}
+        complete -F _weboob_{1} {0}
+        ''').format(name, name.replace('-', '_'), ' '.join(items))
+    with open(os.path.join(BASE_PATH, COMP_PATH), 'w') as f:
+        f.write(compscript)
+
+
 if __name__ == '__main__':
     sys.exit(main())

weboob/tools/application/base.py

@@ -354,15 +354,19 @@ class Application(object):
         if ask_debug_mode:
             print(debugmsg, file=self.stderr)
 
+    def _shell_completion_items(self):
+        items = set()
+        for option in self._parser.option_list:
+            if option.help is not optparse.SUPPRESS_HELP:
+                items.update(str(option).split('/'))
+        items.update(self._get_completions())
+        return items
+
     def parse_args(self, args):
         self.options, args = self._parser.parse_args(args)
 
         if self.options.shell_completion:
-            items = set()
-            for option in self._parser.option_list:
-                if option.help is not optparse.SUPPRESS_HELP:
-                    items.update(str(option).split('/'))
-            items.update(self._get_completions())
+            items = self._shell_completion_items()
             print(' '.join(items))
             sys.exit(0)