export to webdav

This basically works, but there's a bug when renaming a file that leaves
a .git-annex-temp-content-key file in the webdav store, that never gets
cleaned up.

Also, exporting files with spaces to box.com seems to fail; perhaps it
does not support it?

This commit was supported by the NSF-funded DataLad project.

2 files changed, 39 insertions, 28 deletions

diff --git a/doc/special_remotes/webdav.mdwn b/doc/special_remotes/webdav.mdwn
index 100de8c20..27bd38579 100644
--- a/doc/special_remotes/webdav.mdwn
+++ b/doc/special_remotes/webdav.mdwn
@@ -29,6 +29,10 @@ the webdav remote.
   be created as needed. Use of a https URL is strongly
   encouraged, since HTTP basic authentication is used.
 
+* `exporttree` - Set to "yes" to make this special remote usable
+  by [[git-annex-export]]. It will not be usable as a general-purpose
+  special remote.
+
 * `chunk` - Enables [[chunking]] when storing large files.
 
 * `chunksize` - Deprecated version of chunk parameter above.  
diff --git a/doc/tips/using_box.com_as_a_special_remote.mdwn b/doc/tips/using_box.com_as_a_special_remote.mdwn
index 2edd200b1..80fa5c083 100644
--- a/doc/tips/using_box.com_as_a_special_remote.mdwn
+++ b/doc/tips/using_box.com_as_a_special_remote.mdwn
@@ -1,14 +1,42 @@
-[Box.com](http://box.com/) is a file storage service, currently notable 
-for providing 50 gb of free storage if you sign up with its Android client.
-(Or a few gb free otherwise.)
+[Box.com](http://box.com/) is a file storage service.
 
 git-annex can use Box as a [[special remote|special_remotes]].
-Recent versions of git-annex make this very easy to set up:
+Recent versions of git-annex make this very easy to set up
+and use.
 
-	WEBDAV_USERNAME=you@example.com WEBDAV_PASSWORD=xxxxxxx git annex initremote box.com type=webdav url=https://dav.box.com/dav/git-annex chunk=50mb encryption=shared
+## git-annex setup
+
+Create the special remote, in your git-annex repository.
+** This example is non-encrypted; fill in your gpg key ID for a securely
+encrypted special remote! **
+
+	WEBDAV_USERNAME=you@example.com WEBDAV_PASSWORD=xxxxxxx git annex initremote box.com type=webdav url=https://dav.box.com/dav/git-annex chunk=50mb encryption=none
+
+Note the use of [[chunking]]. Box has a limit on the maximum size of file
+that can be stored there (currently 256 MB). git-annex can break up large
+files into chunks to avoid the size limit. This needs git-annex version
+3.20120303 or newer, which adds support for chunking.
+
+Now git-annex can copy files to box.com, get files from it, etc, just like
+with any other special remote.
+
+	% git annex copy bigfile --to box.com
+	bigfile (to box.com...) ok
+	% git annex drop bigfile
+	bigfile (checking box.com...) ok
+	% git annex get bigfile
+	bigfile (from box.com...) ok
+
+## exporting trees
+
+By default, files stored in Box will show up there named
+by their git-annex key, not the original filename. If the filenames
+are important, you can run `git annex initremote` with an additional
+parameter "exporttree=yes", and then use [[git-annex-export]] to publish
+a tree of files to Box.
 
-Note the use of [[chunking]]; Box has a 100 mb maximum file size, and this
-breaks up large files into chunks before that limit is reached.
+Note that chunking can't be used when exporting a tree of files,
+so Box's 250 mb limit will prevent exporting larger files.
 
 # old davfs2 method
 
@@ -48,24 +76,3 @@ using the webdav special remote.
 * Now you should be able to mount Box, as a non-root user:
 
         mount /media/box.com
-
-## git-annex setup
-
-You need git-annex version 3.20120303 or newer, which adds support for chunking
-files larger than Box's 100 mb limit.
-
-Create the special remote, in your git-annex repository.
-** This example is non-encrypted; fill in your gpg key ID for a securely
-encrypted special remote! **
-
-	git annex initremote box.com type=directory directory=/media/box.com chunk=2mb encryption=none
-
-Now git-annex can copy files to box.com, get files from it, etc, just like
-with any other special remote.
-
-	% git annex copy bigfile --to box.com
-	bigfile (to box.com...) ok
-	% git annex drop bigfile
-	bigfile (checking box.com...) ok
-	% git annex get bigfile
-	bigfile (from box.com...) ok