dup handler: correctly handle Dropbox access token (Closes: #11260).

Thanks to Daniel Lo Nigro for the patch.

AUTHORS

@@ -55,3 +55,4 @@ Christian Prause <cprause@suse.com> -- Support suse in the sys handler
 Jools Wills <jools@oxfordinspire.co.uk> -- Bugfix in the sys helper, indentation fixes
 Mark Janssen <mark@sig-io.nl> -- ignore jobs whose filename ends with "~"
 shred <riseup@ml.shredzone.de> -- Initial patch for test mode support in the rsync handler
+Daniel Lo Nigro <daniel@dan.cx> -- Dropbox support for Duplicity

examples/example.dup

@@ -189,6 +189,7 @@ exclude = /var/cache/backupninja/duplicity
 ## desturl = rsync://user@other.host//var/backup/bla
 ## desturl = s3+http://
 ## desturl = ftp://myftpuser@ftp.example.org/remote/ftp/path
+## desturl = dpbx:///myserver
 ## the default value of this configuration option is not set:
 ##
 ## Default:
@@ -213,6 +214,16 @@ exclude = /var/cache/backupninja/duplicity
 # cfapikey = 
 # cfauthurl = 
 
+## Dropbox requires a valid authentication token. To obtain one, you will need
+## to create a Dropbox API application at https://www.dropbox.com/developers/apps/create.
+## See the "A note on Dropbox access" section of the Duplicity manpage for more
+## details: http://duplicity.nongnu.org/duplicity.1.html#sect12
+##
+## Default:
+# dropboxappkey =
+# dropboxappsecret =
+# dropboxaccesstoken =
+
 ## FTP password, needed for backups using desturl = ftp://...
 ##
 ## Default:

handlers/dup.helper.in

@@ -470,6 +470,7 @@ keepincroffulls = $dup_keepincroffulls
 #desturl = rsync://user@other.host//var/backup/bla
 #desturl = s3+http://your_bucket
 #desturl = ftp://myftpuser@ftp.example.org/remote/ftp/path
+#desturl = dpbx:///myserver
 
 # Amazon Web Services Access Key ID and Secret Access Key, needed for backups
 # to S3 buckets.
@@ -486,6 +487,16 @@ keepincroffulls = $dup_keepincroffulls
 # cfapikey = 
 # cfauthurl = 
 
+## Dropbox requires a valid authentication token. To obtain one, you will need
+## to create a Dropbox API application at https://www.dropbox.com/developers/apps/create.
+## See the "A note on Dropbox access" section of the Duplicity manpage for more
+## details: http://duplicity.nongnu.org/duplicity.1.html#sect12
+##
+## Default:
+# dropboxappkey =
+# dropboxappsecret =
+# dropboxaccesstoken =
+
 # FTP password, needed for backups using desturl = ftp://...
 #ftp_password = 
 

handlers/dup.in

@@ -34,6 +34,9 @@ getconf awssecretaccesskey
 getconf cfusername
 getconf cfapikey
 getconf cfauthurl
+getconf dropboxappkey
+getconf dropboxappsecret
+getconf dropboxaccesstoken
 getconf ftp_password
 getconf sshoptions
 getconf bandwidthlimit 0
@@ -54,6 +57,16 @@ fi
 if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "cf+http" ]; then
    [ -n "$cfusername" -a -n "$cfapikey" ]  || fatal "Cloudfiles access keys must be set for S3 backups."
 fi
+if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "dpbx" ]; then
+   [ -n "$dropboxappkey" -a -n "$dropboxappsecret" ]  || fatal "Dropbox app ID and secret must be set for Dropbox backups."
+
+   if [ ! -n "$dropboxaccesstoken" ]; then
+      error "To obtain an access token for Dropbox, you will need to manually run this command:"
+      error "DPBX_APP_KEY=$dropboxappkey DPBX_APP_SECRET=$dropboxappsecret duplicity list-current-files $desturl"
+      fatal "Dropbox access token must be set"
+   fi
+fi
+
 if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "ftp" ]; then
    [ -n "$ftp_password" ]  || fatal "ftp_password must be set for FTP backups."
 fi
@@ -279,6 +292,13 @@ if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "cf+http" ]; then
    fi
 fi
 
+### If desturl is a Dropbox URL, export the relevant environment variables
+if [ "`echo $desturl | @AWK@ -F ':' '{print $1}'`" == "dpbx" ]; then
+   export DPBX_APP_KEY="$dropboxappkey"
+   export DPBX_APP_SECRET="$dropboxappsecret"
+   export DPBX_ACCESS_TOKEN="$dropboxaccesstoken"
+fi
+
 ### Cleanup commands (duplicity >= 0.4.4)
 
 # cleanup