feat(nvim): add luasnip snippets

modules/programs/nvim/default.nix

@@ -19,6 +19,11 @@ in
         )
       ];
 
+      xdg.configFile."nvim/snippets" = {
+        recursive = true;
+        source = ./plugins/snippets;
+      };
+
       programs.neovim = {
         enable = true;
         package = inputs.neovim-nightly-overlay.packages.${pkgs.system}.default;

modules/programs/nvim/plugins/coding.nix

@@ -85,26 +85,12 @@ with builtins;
         { plugin = cmp_luasnip; }
         { plugin = cmp-spell; }
         { plugin = cmp-nvim-lsp-signature-help; }
-        {
-          plugin = copilot-cmp;
-          opts = { };
-          dependencies = [
-            {
-              plugin = copilot-lua;
-              opts = {
-                suggestion = { enabled = false; };
-                panel = { enabled = false; };
-              };
-              conf = /* lua */ ''
-                require("copilot").setup(opts)
-                vim.cmd("Copilot disable")
-              '';
-            }
-          ];
-        }
         { plugin = friendly-snippets; }
         { plugin = lspkind-nvim; }
-        { plugin = luasnip; }
+        {
+          plugin = luasnip;
+          conf = readFile ./lua/luasnip.lua;
+        }
       ];
     }
     {

modules/programs/nvim/plugins/lua/luasnip.lua

@@ -0,0 +1,24 @@
+local ls = require("luasnip")
+local types = require("luasnip.util.types")
+
+-- Every unspecified option will be set to the default.
+ls.setup({
+  history = true,
+
+  -- Update more often, :h events for more info.
+  update_events = "TextChanged,TextChangedI",
+  -- Snippets aren't automatically removed if their text is deleted.
+  -- `delete_check_events` determines on which events (:h events) a check for
+  -- deleted snippets is performed.
+  -- This can be especially useful when `history` is enabled.
+  delete_check_events = "TextChanged",
+  ext_opts = {
+    [types.choiceNode] = {
+      active = {
+        virt_text = { { "<--", "Error" } },
+      },
+    },
+  },
+})
+
+require("luasnip.loaders.from_lua").load({ paths = "~/.config/nvim/snippets" })

modules/programs/nvim/plugins/lua/nvim-cmp.lua

@@ -2,23 +2,12 @@ local cmp = require("cmp")
 local luasnip = require("luasnip")
 require("luasnip.loaders.from_vscode").lazy_load()
 
-local has_words_before = function()
-  if vim.api.nvim_buf_get_option(0, "buftype") == "prompt" then
-    return false
-  end
-  local line, col = unpack(vim.api.nvim_win_get_cursor(0))
-  return col ~= 0 and vim.api.nvim_buf_get_text(0, line - 1, 0, line - 1, col, {})[1]:match("^%s*$") == nil
-end
-
 cmp.setup({
   formatting = {
     format = require("lspkind").cmp_format({
       mode = "symbol", -- show only symbol annotations
       maxwidth = 50, -- prevent the popup from showing more than provided characters
       ellipsis_char = "...", -- when popup menu exceed maxwidth, the truncated part would show ellipsis_char instead
-      symbol_map = {
-        Copilot = "",
-      },
     }),
   },
   snippet = {
@@ -31,36 +20,55 @@ cmp.setup({
     ["<C-b>"] = cmp.mapping.scroll_docs(-4),
     ["<C-f>"] = cmp.mapping.scroll_docs(4),
     ["<C-Space>"] = cmp.mapping.complete(),
-    ["<C-e>"] = cmp.mapping.abort(),
+    ["<S-CR>"] = cmp.mapping.abort(),
     ["<CR>"] = cmp.mapping.confirm({ select = true }),
     ["<Tab>"] = cmp.mapping(function(fallback)
-      if cmp.visible() and has_words_before() then
+      if luasnip.jumpable(1) then
+        luasnip.jump(1)
+      elseif cmp.visible() then
         cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
-      elseif luasnip.expand_or_jumpable() then
-        luasnip.expand_or_jump()
       else
         fallback()
       end
     end, { "i", "s" }),
     ["<S-Tab>"] = cmp.mapping(function(fallback)
-      if cmp.visible() then
+      if luasnip.jumpable(-1) then
-        cmp.select_prev_item()
-      elseif luasnip.jumpable(-1) then
         luasnip.jump(-1)
+      elseif cmp.visible() then
+        cmp.select_prev_item({ behavior = cmp.SelectBehavior.Select })
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
+    ["<C-n>"] = cmp.mapping(function(fallback)
+      if luasnip.choice_active() then
+        luasnip.change_choice(1)
+      elseif cmp.visible() then
+        cmp.select_next_item({ behavior = cmp.SelectBehavior.Select })
+      else
+        fallback()
+      end
+    end, { "i", "s" }),
+    ["<C-p>"] = cmp.mapping(function(fallback)
+      if luasnip.choice_active() then
+        luasnip.change_choice(-1)
+      elseif cmp.visible() then
+        cmp.select_prev_item({ behavior = cmp.SelectBehavior.Select })
       else
         fallback()
       end
     end, { "i", "s" }),
   }),
-  sources = {
+  sources = cmp.config.sources({
     { name = "async_path", priority = 1 },
-    { name = "buffer", priority = 1 },
+    { name = "nvim_lsp", priority = 2 },
-    { name = "spell", priority = 1 },
-    { name = "luasnip", priority = 2 },
-    { name = "copilot", priority = 3 },
-    { name = "nvim_lsp", priority = 3 },
     { name = "nvim_lsp_signature_help", priority = 3 },
-  },
+    { name = "luasnip", priority = 4 },
+  }, {
+    { name = "async_path" },
+    { name = "buffer" },
+    { name = "spell" },
+  }),
 })
 
 -- Set configuration for specific filetype.

modules/programs/nvim/plugins/snippets/python.lua

@@ -0,0 +1,194 @@
+local ls = require("luasnip")
+local s = ls.snippet
+local sn = ls.snippet_node
+local isn = ls.indent_snippet_node
+local t = ls.text_node
+local i = ls.insert_node
+local f = ls.function_node
+local c = ls.choice_node
+local d = ls.dynamic_node
+local r = ls.restore_node
+local events = require("luasnip.util.events")
+local ai = require("luasnip.nodes.absolute_indexer")
+local extras = require("luasnip.extras")
+local l = extras.lambda
+local rep = extras.rep
+local p = extras.partial
+local m = extras.match
+local n = extras.nonempty
+local dl = extras.dynamic_lambda
+local fmt = require("luasnip.extras.fmt").fmt
+local fmta = require("luasnip.extras.fmt").fmta
+local conds = require("luasnip.extras.expand_conditions")
+local postfix = require("luasnip.extras.postfix").postfix
+local types = require("luasnip.util.types")
+local parse = require("luasnip.util.parser").parse_snippet
+local ms = ls.multi_snippet
+local k = require("luasnip.nodes.key_indexer").new_key
+
+local arg_template = [[
+  {arg}: {type}
+]]
+
+local function pyarg()
+  return sn(
+    nil,
+    fmt(arg_template, {
+      arg = i(1, "arg"),
+      type = i(2, "Any"),
+    })
+  )
+end
+
+local function pyargs(_, _, _, user_args)
+  local choices = {
+    sn(nil, i(1)),
+    sn(nil, {
+      not user_args and t(", ") or t(""),
+      d(1, pyarg),
+      d(2, pyargs, { user_args = { false } }),
+    }),
+  }
+  -- switch order for first call
+  if user_args then
+    local fst, snd = unpack(choices)
+    choices = { snd, fst }
+  end
+
+  return sn(nil, c(1, choices))
+end
+
+local def_template = [[
+def {fname}({args}) -> {rtype}:
+  """
+  {docs}
+  """
+  {final}
+]]
+
+local def = s(
+  "def",
+  fmt(def_template, {
+    fname = i(1, "fname"),
+    args = d(2, pyargs, nil, { user_args = { true } }),
+    rtype = i(3, "None"),
+    docs = i(4, "Documentation"),
+    final = i(5, "pass"),
+  }, { priority = 1001 })
+)
+
+local defs_template = [[
+def {mname}(self, {args}) -> {rtype}:
+  """
+  {docs}
+  """
+  {final}
+]]
+
+local defs = s(
+  "defs",
+  fmt(defs_template, {
+    mname = i(1, "mname"),
+    args = d(2, pyargs, nil, { user_args = { true } }),
+    rtype = i(3, "None"),
+    docs = i(4, "Documentation"),
+    final = i(5, "pass"),
+  }, { priority = 1001 })
+)
+
+local enum_template = [[
+for {i}, {value} in enumerate({iter}):
+    {final}
+]]
+
+local dot_enum = postfix(".enum", {
+  d(1, function(_, parent)
+    return sn(
+      1,
+      fmt(enum_template, {
+        i = i(1, "i"),
+        value = i(2, "value"),
+        iter = t(parent.env.POSTFIX_MATCH),
+        final = i(3, "pass"),
+      })
+    )
+  end),
+})
+
+local enum = s(
+  "enum",
+  fmt(enum_template, {
+    i = i(1, "i"),
+    value = i(2, "value"),
+    iter = i(3, "iter"),
+    final = i(4, "pass"),
+  })
+)
+
+local for_template = [[
+for {item} in {iter}:
+    {final}
+]]
+
+local dot_for = postfix(".for", {
+  d(1, function(_, parent)
+    return sn(
+      1,
+      fmt(for_template, {
+        item = i(1, "item"),
+        iter = t(parent.env.POSTFIX_MATCH),
+        final = i(2, "pass"),
+      })
+    )
+  end),
+})
+
+local items_template = [[
+for {key}, {value} in {iter}:
+    {final}
+]]
+
+local dot_items = postfix(".items", {
+  d(1, function(_, parent)
+    return sn(
+      1,
+      fmt(items_template, {
+        key = i(1, "key"),
+        value = i(2, "value"),
+        iter = t(parent.env.POSTFIX_MATCH),
+        final = i(3, "pass"),
+      })
+    )
+  end),
+})
+
+local try_template = [[
+try:
+    {raises}
+except {exception} as {ename}:
+    {final}
+]]
+
+local dot_try = postfix(".try", {
+  d(1, function(_, parent)
+    return sn(
+      1,
+      fmt(try_template, {
+        raises = t(parent.env.POSTFIX_MATCH),
+        exception = i(1, "Exception"),
+        ename = i(2, "e"),
+        final = i(3, "pass"),
+      })
+    )
+  end),
+})
+
+return {
+  def,
+  defs,
+  dot_enum,
+  dot_for,
+  dot_items,
+  dot_try,
+  enum,
+}