Allow for placing addons in subfolders.

Addons can be placed in subfolders with the same name as the action,
in order to be able to e.g. clone git repos into the TODO_ACTIONS_DIR
rather than having to download addons and manage updates manually.

Closes #120

tests/t8010-listaddons.sh

@@ -41,4 +41,44 @@ ls
 quux
 EOF
 
+make_action_in_folder "chuck"
+# Add a bit of cruft in the action folders in order to ensure that we only
+# care about the executables with the same name as the folder in which they
+# reside.
+touch .todo.actions.d/chuck/mc_hammer     # can't touch this
+chmod u+x .todo.actions.d/chuck/mc_hammer # better run, better run run
+touch .todo.actions.d/chuck/README
+
+make_action_in_folder "norris"
+
+test_todo_session 'custom actions in subfolders' <<EOF
+>>> test -f .todo.actions.d/chuck/README
+=== 0
+
+>>> test -x .todo.actions.d/chuck/mc_hammer
+=== 0
+
+>>> todo.sh listaddons
+bar
+chuck
+ls
+norris
+quux
+EOF
+
+# nthorne: shamelessly stolen from above..
+chmod -x .todo.actions.d/norris/norris
+# On Cygwin, clearing the executable flag may have no effect, as the Windows ACL
+# may still grant execution rights. In this case, we skip the test.
+if [ -x .todo.actions.d/norris/norris ]; then
+    SKIP_TESTS="${SKIP_TESTS}${SKIP_TESTS+ }t8010.8"
+fi
+test_todo_session 'nonexecutable action in subfolder' <<EOF
+>>> todo.sh listaddons
+bar
+chuck
+ls
+quux
+EOF
+
 test_done