Add Google Drive support to Tramp

* doc/misc/tramp.texi: Add `gdrive' method.

* doc/misc/trampver.texi:
* lisp/net/trampver.el: Change version to "2.3.1-pre".

* etc/NEWS: Add Tramp connection method "gdrive".

* lisp/net/tramp-gvfs.el (tramp-gvfs-methods) <gdrive>: Add.
(tramp-default-user-alist, tramp-default-host-alist): Add rule
for "gdrive".
(tramp-gvfs-file-attributes): Add "name", remove "standard::icon".
(tramp-gvfs-file-attributes-with-gvfs-ls-regexp): Simplify regexp.
(tramp-gvfs-get-directory-attributes): Improve loop.  Use
"standard::display-name" as file name, if available.
(tramp-gvfs-handle-file-name-all-completions): Simplify.
(tramp-gvfs-url-file-name, tramp-gvfs-handler-mounted-unmounted)
(tramp-gvfs-connection-mounted-p, tramp-gvfs-mount-spec):
Map between "gdrive" and "google-drive".

* lisp/net/tramp.el (tramp-call-process): Do not signal error.

* test/lisp/net/tramp-tests.el (tramp--instrument-test-case):
Do not enable `tramp-message-show-message'.
(tramp-test13-make-directory, tramp-test14-delete-directory):
Do not specify error type.

2 files changed, 19 insertions, 3 deletions

diff --git a/doc/misc/tramp.texi b/doc/misc/tramp.texi
index 894ccbe9c9c..dc3ef23c455 100644
--- a/doc/misc/tramp.texi
+++ b/doc/misc/tramp.texi
@@ -957,6 +957,22 @@ syntax requires a leading volume (share) name, for example:
 based on standard protocols, such as HTTP@.  @option{davs} does the same
 but with SSL encryption.  Both methods support the port numbers.
 
+@item @option{gdrive}
+@cindex method gdrive
+@cindex gdrive method
+@cindex Google Drive
+
+Via the @option{gdrive} method it is possible to access your Google
+Drive online storage.  User and host name of the remote file name are
+your email address of the Google Drive credentials, like
+@file{@trampfn{gdrive,john.doe@@gmail.com,/}}.  These credentials must
+be populated in your @command{Online Accounts} application outside Emacs.
+
+Since Google Drive uses cryptic blob file names internally,
+@value{tramp} works with the @code{display-name} of the files.  This
+could produce unexpected behaviour in case two files in the same
+directory have the same @code{display-name}, such a situation must be avoided.
+
 @item @option{obex}
 @cindex method obex
 @cindex obex method
@@ -986,8 +1002,8 @@ requires the SYNCE-GVFS plugin.
 @vindex tramp-gvfs-methods
 This custom option is a list of external methods for GVFS@.  By
 default, this list includes @option{afp}, @option{dav}, @option{davs},
-@option{obex}, @option{sftp} and @option{synce}.  Other methods to
-include are: @option{ftp} and @option{smb}.
+@option{gdrive}, @option{obex}, @option{sftp} and @option{synce}.
+Other methods to include are: @option{ftp} and @option{smb}.
 @end defopt
 
 
diff --git a/doc/misc/trampver.texi b/doc/misc/trampver.texi
index 6f67f35902a..3101dc0de82 100644
--- a/doc/misc/trampver.texi
+++ b/doc/misc/trampver.texi
@@ -8,7 +8,7 @@
 @c In the Tramp GIT, the version number is auto-frobbed from
 @c configure.ac, so you should edit that file and run
 @c "autoconf && ./configure" to change the version number.
-@set trampver 2.3.0
+@set trampver 2.3.1-pre
 
 @c Other flags from configuration
 @set instprefix /usr/local