khal: fix contact integration (#4836)

* khal: fix contact integration

- Add tests for contact+khal
- Make options `color`/`priority` available for contact accounts

* khal: add separate calendar for each contact collection

A contact account may have multiple VCARD collections, but Khal doesn't
search recursively. Collection folder names must be hardcoded, and each
has its own calendar.

- Add khal.collections option for contact accounts
- Default to previous setup for accounts with a single collection
- Add tests

* khal: specify how priority is defined by Khal

See https://khal.readthedocs.io/en/latest/configure.html

tests/modules/programs/khal/config.nix

@@ -32,6 +32,36 @@
     };
   };
 
+  accounts.contact = {
+    basePath = "$XDG_CONFIG_HOME/card";
+    accounts = {
+      testcontacts = {
+        khal = {
+          enable = true;
+          collections = [ "default" "automaticallyCollected" ];
+        };
+        local.type = "filesystem";
+        local.fileExt = ".vcf";
+        name = "testcontacts";
+        remote = {
+          type = "http";
+          url = "https://example.com/contacts.vcf";
+        };
+      };
+
+      testcontactsNoCollections = {
+        khal.enable = true;
+        local.type = "filesystem";
+        local.fileExt = ".vcf";
+        name = "testcontactsNoCollections";
+        remote = {
+          type = "http";
+          url = "https://example.com/contacts.vcf";
+        };
+      };
+    };
+  };
+
   test.stubs = { khal = { }; };
 
   nmt.script = ''

tests/modules/programs/khal/khal-config-expected

@@ -7,6 +7,27 @@ type=calendar
 
 
 
+[[testcontacts-automaticallyCollected]]
+path = /home/hm-user/$XDG_CONFIG_HOME/card/testcontacts/automaticallyCollected
+priority=10
+type=birthdays
+
+
+
+[[testcontacts-default]]
+path = /home/hm-user/$XDG_CONFIG_HOME/card/testcontacts/default
+priority=10
+type=birthdays
+
+
+
+[[testcontactsNoCollections]]
+path = /home/hm-user/$XDG_CONFIG_HOME/card/testcontactsNoCollections/
+priority=10
+type=birthdays
+
+
+
 [default]
 default_calendar=test
 highlight_event_days=true