Add a :version command

doc/changelog.asciidoc

@@ -67,6 +67,7 @@ Added
   - `:config-clear` to remove all configured options
   - `:config-source` to (re-)read a `config.py` file
   - `:config-edit` to open the `config.py` file in an editor
+- New `:version` command which opens `qute://version`.
 
 Changed
 ~~~~~~~

doc/help/commands.asciidoc

@@ -91,6 +91,7 @@ It is possible to run or bind multiple commands by separating them with `;;`.
 |<<tab-prev,tab-prev>>|Switch to the previous tab, or switch [count] tabs back.
 |<<unbind,unbind>>|Unbind a keychain.
 |<<undo,undo>>|Re-open a closed tab.
+|<<version,version>>|Show version information.
 |<<view-source,view-source>>|Show the source of the current page in a new tab.
 |<<window-only,window-only>>|Close all windows except for the current one.
 |<<yank,yank>>|Yank something to the clipboard or primary selection.
@@ -1015,6 +1016,10 @@ Unbind a keychain.
 === undo
 Re-open a closed tab.
 
+[[version]]
+=== version
+Show version information.
+
 [[view-source]]
 === view-source
 Show the source of the current page in a new tab.

qutebrowser/misc/utilcmds.py

@@ -342,3 +342,12 @@ def window_only(current_win_id):
 def nop():
     """Do nothing."""
     return
+
+
+@cmdutils.register()
+@cmdutils.argument('win_id', win_id=True)
+def version(win_id):
+    """Show version information."""
+    tabbed_browser = objreg.get('tabbed-browser', scope='window',
+                                window=win_id)
+    tabbed_browser.openurl(QUrl('qute://version'), newtab=True)

tests/unit/misc/test_utilcmds.py

@@ -25,10 +25,11 @@ import signal
 import time
 
 import pytest
+from PyQt5.QtCore import QUrl
 
 from qutebrowser.misc import utilcmds
 from qutebrowser.commands import cmdexc
-from qutebrowser.utils import utils
+from qutebrowser.utils import utils, objreg
 
 
 @contextlib.contextmanager
@@ -142,3 +143,16 @@ def test_window_only(mocker, monkeypatch):
     assert not test_windows[0].closed
     assert not test_windows[1].closed
     assert test_windows[2].closed
+
+
+@pytest.fixture
+def tabbed_browser(stubs, win_registry):
+    tb = stubs.TabbedBrowserStub()
+    objreg.register('tabbed-browser', tb, scope='window', window=0)
+    yield tb
+    objreg.delete('tabbed-browser', scope='window', window=0)
+
+
+def test_version(tabbed_browser):
+    utilcmds.version(win_id=0)
+    assert tabbed_browser.opened_url == QUrl('qute://version')