init

config/plugins/luasnip/luasnip.nix

@@ -0,0 +1,102 @@
+{ helpers, ... }:
+let
+  inherit (helpers) mkRaw;
+in
+{
+  plugins.luasnip = {
+    enable = true;
+    filetypeExtend = {
+      lua = [
+        "c"
+        "cpp"
+      ];
+    };
+    settings = {
+      # https://github.com/L3MON4D3/LuaSnip/blob/master/DOC.md#config-options
+      enable_autosnippets = true;
+      # https://github.com/L3MON4D3/LuaSnip/blob/master/DOC.md#variables
+      cut_selection_keys = "<Tab>";
+      update_events = "TextChanged,TextChangedI";
+    };
+    # https://github.com/L3MON4D3/LuaSnip/blob/master/DOC.md#lua
+    fromLua = [
+      { paths = ./snippets; } # snippts attached to nixvim repo
+      { paths = "~/snippets"; } # snippts in home dir
+    ];
+  };
+  extraFiles = {
+    "lua/luasnip-helper-funcs.lua".source = ./helpers/luasnip-helper-funcs.lua;
+  };
+  # https://github.com/L3MON4D3/LuaSnip/wiki/Nice-Configs#hint-node-type-with-virtual-text
+  extraConfigLua = ''
+    local types = require("luasnip.util.types")
+    require'luasnip'.config.setup({
+      ext_opts = {
+        [types.choiceNode] = {
+          active = {
+            -- virt_text = {{"●", "GruvboxOrange"}}
+            -- see ":h group-name" (syntax highlighting)
+            virt_text = {{ '««« Choice Node', 'Constant', }}
+          }
+        },
+        [types.insertNode] = {
+          active = {
+            -- virt_text = {{"●", "GruvboxBlue"}}
+            -- see ":h group-name" (syntax highlighting)
+            virt_text = {{ '««« Insert Node', 'Comment', }}
+          }
+        }
+      },
+    })
+  '';
+  keymaps = [
+    {
+      mode = [
+        "i"
+        "s"
+      ];
+      key = "<C-j>";
+      action = mkRaw ''
+        function()
+          local ls = require('luasnip')
+          if ls.expand_or_jumpable() then
+            ls.expand_or_jump()
+          end
+        end
+      '';
+      options.silent = true;
+    }
+    {
+      mode = [
+        "i"
+        "s"
+      ];
+      key = "<C-k>";
+      action = mkRaw ''
+        function()
+          local ls = require('luasnip')
+          if ls.jumpable(-1) then
+            ls.jump(-1)
+          end
+        end
+      '';
+      options.silent = true;
+    }
+    {
+      mode = [
+        "i"
+        "s"
+      ];
+      key = "<C-e>";
+      action = mkRaw ''
+        function()
+          local ls = require('luasnip')
+          if ls.choice_active() then
+            ls.change_choice(1)
+          end
+        end
+      '';
+      options.silent = true;
+    }
+  ];
+}