nvim: added lilypond support

.config/nvim/after/ftplugin/lilypond.lua

@@ -0,0 +1,57 @@
+local wk = require("which-key")
+
+local fluidsynth_job = nil
+
+-- setup interactive midi player
+wk.add({
+  { mode = "n", "<leader>p", desc = "Lilypond: output" },
+  {
+    mode = "n",
+    "<leader>pm",
+    function()
+      local midi = vim.fn.expand("%:r") .. ".midi"
+
+      if fluidsynth_job then
+        vim.fn.jobstop(fluidsynth_job)
+        fluidsynth_job = nil
+        print("fluidsynth stopped")
+        return
+      end
+
+      fluidsynth_job = vim.fn.jobstart({ "fluidsynth", "-i", midi })
+      print("fluidsynth playing (Ctrl-C to stop)")
+    end,
+    desc = "Lilypond: output MIDI",
+    buffer = true,
+  },
+  {
+    mode = "n",
+    "<leader>pp",
+    "<cmd>Viewer<CR>",
+    desc = "Lilypond: open PDF",
+    buffer = true,
+  },
+  {
+    mode = "n",
+    "<C-c>",
+    function()
+      if fluidsynth_job then
+        vim.fn.jobstop(fluidsynth_job)
+        fluidsynth_job = nil
+        print("fluidsynth stopped")
+      else
+        vim.cmd("normal! <C-c>")
+      end
+    end,
+    desc = "Stop MIDI playback",
+    buffer = true,
+  },
+})
+
+-- autostart
+if vim.b.first_start_lilypond then
+  return
+end
+vim.b.first_start_lilypond = true
+
+vim.cmd.Viewer()