show plugin dependencies

gui/qt/main_window.py

@@ -2715,7 +2715,10 @@ class ElectrumWindow(QMainWindow):
                 else:
                     w = None
                 cb.clicked.connect(mk_toggle(cb, name, w))
-                grid.addWidget(HelpButton(descr['description']), i, 2)
+                msg = descr['description']
+                if descr.get('requires'):
+                    msg += '\n\n' + _('Requires') + ':\n' + '\n'.join(map(lambda x: x[1], descr.get('requires')))
+                grid.addWidget(HelpButton(msg), i, 2)
             except Exception:
                 print_msg("Error: cannot display plugin", name)
                 traceback.print_exc(file=sys.stdout)

lib/plugins.py

@@ -37,7 +37,7 @@ def is_available(name, w):
     else:
         return False
     deps = d.get('requires', [])
-    for dep in deps:
+    for dep, s in deps:
         try:
             __import__(dep)
         except ImportError:
@@ -84,7 +84,7 @@ def init_plugins(config, is_local, gui_name):
             p = loader(name)
             plugins[name] = p.Plugin(config, name)
         except Exception:
-            print_msg(_("Error: cannot initialize plugin"), p)
+            print_msg(_("Error: cannot initialize plugin"), name)
             traceback.print_exc(file=sys.stdout)
 
 hook_names = set()

plugins/__init__.py

@@ -22,16 +22,15 @@ descriptions = [
     {
         'name': 'audio_modem',
         'fullname': _('Audio MODEM'),
-        'description': ('Provides support for air-gapped transaction signing.\n\n'
+        'description': _('Provides support for air-gapped transaction signing.'),
-                        'Requires http://github.com/romanz/amodem/'),
+        'requires': [('amodem', 'http://github.com/romanz/amodem/')],
-        'requires': ['amodem'],
         'available_for': ['qt'],
     },
     {
         'name': 'btchipwallet',
         'fullname': _('BTChip Wallet'),
-        'description': _('Provides support for BTChip hardware wallet') + '\n\n' + _('Requires github.com/btchip/btchip-python'),
+        'description': _('Provides support for BTChip hardware wallet'),
-        'requires': ['btchip'],
+        'requires': [('btchip', 'github.com/btchip/btchip-python')],
         'requires_wallet_type': ['btchip'],
         'registers_wallet_type': True,
         'available_for': ['qt'],
@@ -43,14 +42,14 @@ descriptions = [
             _("This plugin facilitates the use of multi-signatures wallets."),
             _("It sends and receives partially signed transactions from/to your cosigner wallet."),
             _("Transactions are encrypted and stored on a remote server.")
-            ]),
+        ]),
         'requires_wallet_type': ['2of2', '2of3'],
         'available_for': ['qt'],
     },
     {
         'name': 'exchange_rate',
         'fullname': _("Exchange rates"),
-        'description': """exchange rates, retrieved from blockchain.info, CoinDesk, or Coinbase""",
+        'description': _("Exchange rates and currency conversion tools."),
         'available_for': ['qt'],
     },
     {
@@ -62,35 +61,35 @@ descriptions = [
     {
         'name': 'labels',
         'fullname': _('LabelSync'),
-        'description': '%s\n\n%s' % (_("The new and improved LabelSync plugin. This can sync your labels across multiple Electrum installs by using a remote database to save your data. Labels, transactions ids and addresses are encrypted before they are sent to the remote server."), _("The label sync's server software is open-source as well and can be found on github.com/maran/electrum-sync-server")),
+        'description': '\n'.join([
+            _("The new and improved LabelSync plugin. This can sync your labels across multiple Electrum installs by using a remote database to save your data. Labels, transactions ids and addresses are encrypted before they are sent to the remote server."),
+            _("The label sync's server software is open-source as well and can be found on github.com/maran/electrum-sync-server")
+        ]),
         'available_for': ['qt']
     },
     {
         'name': 'openalias',
         'fullname': 'OpenAlias',
-        'description': 'Allow for payments to OpenAlias addresses.\nRequires dnspython',
+        'description': _('Allow for payments to OpenAlias addresses.'),
-        'requires': ['dns'],
+        'requires': [('dns', 'dnspython')],
         'available_for': ['qt']
     },
     {
         'name': 'plot',
         'fullname': 'Plot History',
-        'description': '\n'.join([
+        'description': _("Ability to plot transaction history in graphical mode."),
-            _("Ability to plot transaction history in graphical mode."),
+        'requires': [('matplotlib', 'matplotlib')],
-            _("Warning: Requires matplotlib library.")
-        ]),
-        'requires': ['matplotlib'],
         'available_for': ['qt'],
     },
     {
         'name':'trezor',
         'fullname': 'Trezor Wallet',
-        'description': 'Provides support for Trezor hardware wallet\n\nRequires github.com/trezor/python-trezor',
+        'description': _('Provides support for Trezor hardware wallet'),
         'available_for': ['qt'],
-        'requires': ['trezorlib'],
+        'requires': [('trezorlib','github.com/trezor/python-trezor')],
         'requires_wallet_type': ['trezor'],
         'registers_wallet_type': True,
-        'available_for': ['qt', 'cmdline']
+        'available_for': ['qt', 'cmdline'],
     },
     {
         'name': 'trustedcoin',