mail: Set up vdirsyncer for caldav/carddav

Set up vdirsyncer to have synchronization with my nextcloud instance.
Pulls credentials from local pass set up and always gives priority to
remote instances so nothing gets lost on local data issues.

mail/.config/vdirsyncer/config

@@ -0,0 +1,39 @@
+[general]
+status_path = "~/.local/vdirsyncer/status/"
+
+[pair calendar]
+a = "calendar_local"
+b = "calendar_nextcloud"
+collections = ["from a", "from b"]
+metadata = ["displayname", "color"]
+conflict_resolution = "b wins"
+
+[storage calendar_local]
+type = "filesystem"
+path = "~/documents/calendars/"
+fileext = ".ics"
+
+[storage calendar_nextcloud]
+type = "caldav"
+url = "https://files.martyoeh.me/remote.php/dav/"
+username.fetch = ["shell", "pass personal/files.martyoeh.me/me | awk -F': ' '{print $2}'"]
+password.fetch = ["shell", "pass personal/files.martyoeh.me/me | head -n1"]
+
+[pair contacts]
+a = "contacts_local"
+b = "contacts_nextcloud"
+collections = ["from a", "from b"]
+metadata = ["displayname", "description"]
+conflict_resolution = "b wins"
+
+[storage contacts_local]
+type = "filesystem"
+path = "~/documents/contacts/"
+fileext = ".vcf"
+
+[storage contacts_nextcloud]
+type = "carddav"
+url = "https://files.martyoeh.me/remote.php/dav/"
+username.fetch = ["shell", "pass personal/files.martyoeh.me/me | awk -F': ' '{print $2}'"]
+password.fetch = ["shell", "pass personal/files.martyoeh.me/me | head -n1"]
+