feat(macro/event): use lua API

* fixes #5
* datwaft/nvim.conf 1067340

1 files changed, 71 insertions, 45 deletions

diff --git a/fnl/nvrc/macro/event.fnl b/fnl/nvrc/macro/event.fnl
index 0727969..f7a808d 100644
--- a/fnl/nvrc/macro/event.fnl
+++ b/fnl/nvrc/macro/event.fnl
@@ -15,49 +15,75 @@
   (accumulate [is? false _ v (ipairs xs) :until is?]
     (= v x)))
 
+(fn nil? [x]
+  (= nil x))
+
+(fn str? [x]
+  (= :string (type x)))
+
+(fn tbl? [x]
+  (= :table (type x)))
+
+(fn empty? [xs]
+  (= 0 (length xs)))
+
+(lambda seta! [?group events pattern ...]
+  (match [...]
+    (where [options command ?desc] (tbl? options))
+    (do
+      (assert-compile (or (str? ?group) (sym? ?group) (nil? ?group)) "expected string or symbol or nil for group" ?group)
+      (assert-compile (or (tbl? events) (str? events) (sym? events)) "expected table or string or symbol for events" events)
+      (assert-compile (or (tbl? pattern) (str? pattern) (sym? pattern)) "expected table or string or symbol for pattern" pattern)
+      (assert-compile (tbl? options) "expected table for options" options)
+      (assert-compile (or (str? command) (list? command) (fn? command) (sym? command)) "expected string or list or function or symbol for command" command)
+      (assert-compile (or (nil? ?desc) (str? ?desc)) "expected string or nil for description" ?desc)
+      (let [events (if (and (tbl? events) (not (sym? events)))
+                     (icollect [_ v (ipairs events)] (->str v))
+                     (->str events))
+            pattern (if (and (tbl? pattern) (not (sym? pattern)))
+                      (icollect [_ v (ipairs pattern)] (->str v))
+                      (->str pattern))
+            options (collect [_ v (ipairs options)] (->str v) true)
+            options (if (= "<buffer>" pattern)
+                      (doto options (tset :buffer 0))
+                      options)
+            command (if (and (not (fn? command)) (list? command)) `#,command
+                      command)
+            desc (if (and (not ?desc) (or (fn? command) (sym? command))) (view command)
+                   ?desc)
+            options (if desc (doto options (tset :desc desc))
+                      options)
+            options (if options.buffer
+                      options
+                      (doto options (tset :pattern pattern)))
+            options (if ?group
+                      (doto options (tset :group ?group))
+                      options)
+            options (if (str? command)
+                      (doto options (tset :command command))
+                      (doto options (tset :callback command)))]
+        `(vim.api.nvim_create_autocmd ,events ,options)))
+    [command ?desc] (seta! ?group events pattern [] command ?desc)))
+
 (lambda ag! [name ...]
-  "Defines an autocommand group using the vim API."
-  `(do
-     (vim.cmd ,(format "augroup %s" name))
-     (vim.cmd :autocmd!)
-     (do
-       ,...)
-     (vim.cmd "augroup END")))
-
-(lambda agb! [name ...]
-  "Defines a buffer-local autocommand group using the vim API."
-  `(do
-     (vim.cmd ,(format "augroup %s" name))
-     (vim.cmd "autocmd! * <buffer>")
-     (do
-       ,...)
-     (vim.cmd "augroup END")))
-
-(lambda au! [events pattern ...]
-  "Defines an autocommand using the vim API."
-  (let [events (as-> [$ events] (if (sequence? $) $ [$])
-                     (icollect [_ v (ipairs $)]
-                       (->str v)) (concat $ ","))
-        pattern (as-> [$ pattern] (if (sequence? $) $ [$])
-                      (icollect [_ v (ipairs $)]
-                        (->str v)) (concat $ ","))
-        once? (or (includes? [...] `++once) (includes? [...] :++once))
-        nested? (or (includes? [...] `++nested) (includes? [...] :++nested))
-        command (last [...])]
-    (if (fn? command)
-        (let [fsym (gensym-checksum "__" command)]
-          `(do
-             (global ,fsym ,command)
-             (vim.cmd ,(format (if (and once? nested?)
-                                   "autocmd %s %s ++once ++nested call %s" once?
-                                   "autocmd %s %s ++once call %s" nested?
-                                   "autocmd %s %s ++nested call %s"
-                                   "autocmd %s %s call %s")
-                               events pattern (vlua fsym)))))
-        `(vim.cmd ,(format (if (and once? nested?)
-                               "autocmd %s %s ++once ++nested %s" once?
-                               "autocmd %s %s ++once %s" nested?
-                               "autocmd %s %s ++nested %s" "autocmd %s %s %s")
-                           events pattern command)))))
-
-{: ag! : agb! : au!}
+  "Defines an autocommand group using the Lua API."
+  (assert-compile (or (str? name) (sym? name)) "expected string or symbol for name" name)
+  (let [name (->str name)]
+    (if (empty? [...])
+      `(vim.api.nvim_create_augroup ,name {})
+      (let [statements (icollect [_ statement (ipairs [...])]
+                                 (do
+                                   (assert-compile (list? statement) "expected list for statement")
+                                   (let [[_ events pattern options command ?desc] statement]
+                                     (seta! name events pattern options command ?desc))))]
+        `(do
+           (vim.api.nvim_create_augroup ,name {})
+           ,(unpack statements))))))
+
+(lambda au! [...]
+  "Defines an autocommand using the Lua API."
+  (seta! nil ...))
+
+
+
+{: ag! : au!}