Fix pyinstaller packaging

The generated executable's version command was not working since it
does a pkg_resources.require() of rotkehlchen and that does not find
the required packages.

An appropriate pyinstaller hook is now added to handle this.

Author: LefterisJP

rotkehlchen/utils/misc.py

@@ -346,7 +346,7 @@ def get_system_spec() -> Dict[str, str]:
     system_spec = dict(
         # used to be require 'rotkehlchen.__name__' but as long as setup.py
         # target differs from package we need this
-        rotkehlchen=pkg_resources.require('rotki')[0].version,
+        rotkehlchen=pkg_resources.require('rotkehlchen')[0].version,
         python_implementation=platform.python_implementation(),
         python_version=platform.python_version(),
         system=system_info,

setup.py

@@ -24,7 +24,7 @@ def read(fname):
 version = '1.0.4'  # Do not edit: this is maintained by bumpversion (see .bumpversion.cfg)
 
 setup(
-    name='rotki',
+    name='rotkehlchen',
     author='Lefteris Karapetsas',
     author_email='lefteris@refu.co',
     description=('Acccounting, asset management and tax report helper for cryptocurrencies'),

tools/pyinstaller_hooks/hook-rotkehlchen.py

@@ -0,0 +1,25 @@
+import os
+
+import pkg_resources
+
+datas = []
+
+
+# This is only needed until https://github.com/pyinstaller/pyinstaller/issues/3033 is fixed
+# Until then can't use PyInstaller.utils.hooks import copy_metadata
+def copy_metadata(package_name):
+    dist = pkg_resources.get_distribution(package_name)
+    metadata_dir = dist.egg_info
+    return [(metadata_dir, metadata_dir[len(dist.location) + len(os.sep):])]
+
+
+# Add metadata of all required packages to allow pkg_resources.require() to work
+required_packages = [("rotkehlchen", [])]
+while required_packages:
+    req_name, req_extras = required_packages.pop()
+    for req in pkg_resources.get_distribution(req_name).requires(req_extras):
+        required_packages.append((req.project_name, list(req.extras)))
+    try:
+        datas.extend(copy_metadata(req_name))
+    except AssertionError:
+        pass