Merge lp:~jelmer/brz/probe-fossil into lp:brz

[Jelmer Vernooij]

Add a fossil plugin that warns users when they attempt to access a Fossil repository.

Add a fossil plugin that warns users when they attempt to access a Fossil repository.

[Jelmer Vernooij (jelmer)]

review: Approve

=== added directory 'breezy/plugins/fossil'
=== added file 'breezy/plugins/fossil/__init__.py'
--- breezy/plugins/fossil/__init__.py	1970-01-01 00:00:00 +0000
+++ breezy/plugins/fossil/__init__.py	2019-11-09 17:14:52 +0000
@@ -0,0 +1,94 @@
+# Copyright (C) 2019 Jelmer Vernooij <[e-mail]>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 3 of the License or
+# (at your option) a 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+"""Fossil foreign branch support.
+
+Currently only tells the user that Fossil is not supported.
+"""
+
+from __future__ import absolute_import
+
+from ... import version_info  # noqa: F401
+
+from ... import (
+    controldir,
+    errors,
+    )
+
+
+class FossilUnsupportedError(errors.UnsupportedFormatError):
+
+    _fmt = ('Fossil branches are not yet supported. '
+            'To convert Fossil branches to Bazaar branches or vice versa, '
+            'use fastimport.')
+
+
+class FossilDirFormat(controldir.ControlDirFormat):
+    """Fossil directory format."""
+
+    def get_converter(self):
+        raise NotImplementedError(self.get_converter)
+
+    def get_format_description(self):
+        return "Fossil control directory"
+
+    def initialize_on_transport(self, transport):
+        raise errors.UninitializableFormat(self)
+
+    def is_supported(self):
+        return False
+
+    def supports_transport(self, transport):
+        return False
+
+    def check_support_status(self, allow_unsupported, recommend_upgrade=True,
+                             basedir=None):
+        raise FossilUnsupportedError()
+
+    def open(self, transport):
+        # Raise NotBranchError if there is nothing there
+        RemoteFossilProber().probe_transport(transport)
+        raise NotImplementedError(self.open)
+
+
+class RemoteFossilProber(controldir.Prober):
+
+    @classmethod
+    def priority(klass, transport):
+        return 95
+
+    @classmethod
+    def probe_transport(klass, transport):
+        from breezy.transport.http import HttpTransport
+        if not isinstance(transport, HttpTransport):
+            raise errors.NotBranchError(path=transport.base)
+        response = transport.request(
+            'POST', transport.base, headers={'Content-Type': 'application/x-fossil'})
+        if response.status == 501:
+            raise errors.NotBranchError(path=transport.base)
+        ct = response.getheader('Content-Type')
+        if ct is None:
+            raise errors.NotBranchError(path=transport.base)
+        if ct.split(';')[0] != 'application/x-fossil':
+            raise errors.NotBranchError(path=transport.base)
+        return FossilDirFormat()
+
+    @classmethod
+    def known_formats(cls):
+        return [FossilDirFormat()]
+
+
+controldir.ControlDirFormat.register_prober(RemoteFossilProber)
 
=== modified file 'breezy/transport/http/__init__.py'
--- breezy/transport/http/__init__.py	2019-11-01 00:38:34 +0000
+++ breezy/transport/http/__init__.py	2019-11-09 17:14:52 +0000
@@ -1831,6 +1831,7 @@
                        404,  # Not found
                        416,
                        422,
+                       501,  # Not implemented
                        ]
     """The error codes the caller will handle.
 
 
=== modified file 'doc/en/release-notes/brz-3.1.txt'
--- doc/en/release-notes/brz-3.1.txt	2019-11-02 23:19:18 +0000
+++ doc/en/release-notes/brz-3.1.txt	2019-11-09 17:14:52 +0000
@@ -46,6 +46,10 @@
    have installed and speeds up import time since psutil brings in
    various other modules. (Jelmer Vernooij)
 
+ * A new ``fossil`` plugin has been added that warns users when they
+   attempt to access Fossil repositories.
+   (Jelmer Vernooij, #1848821)
+
 Improvements
 ************