Add lua snippets file.

users/jrpotter/lang/lua.nix

@@ -8,5 +8,9 @@
     nvim-lspconfig = ''
       require('lua.init').nvim_lspconfig()
     '';
+
+    nvim-snippets = ''
+      require('luasnip').add_snippets('lua', require('lua.snippets'))
+    '';
   };
 }

users/jrpotter/neovim/config/lua/snippets.lua

@@ -0,0 +1,48 @@
+local fmt = require('luasnip.extras.fmt').fmt
+local ls = require('luasnip')
+local ul = require('utils.luasnip')
+
+local c = ls.choice_node
+local i = ls.insert_node
+local s = ls.snippet
+local sn = ls.snippet_node
+local t = ls.text_node
+
+return {
+  s(
+    { name = 'for', trig = 'for' },
+    fmt([[
+for {} do
+  {}
+end]],
+      {
+        c(1, {
+          sn(nil, {
+            i(1, 'i'),
+            t('='),
+            i(2, 'm'),
+            t(','),
+            i(3, 'n'),
+          }),
+          sn(nil, {
+            i(1, 'k'),
+            t(', '),
+            i(2, 'v'),
+            t(' in pairs('),
+            i(3, 'tbl'),
+            t(')'),
+          }),
+          sn(nil, {
+            i(1, 'i'),
+            t(', '),
+            i(2, 'v'),
+            t(' in ipairs('),
+            i(3, 'seq'),
+            t(')'),
+          }),
+        }),
+        ul.visual_isn(2),
+      }
+    )
+  ),
+}

users/jrpotter/neovim/config/python/snippets.lua

@@ -18,10 +18,10 @@ for {} in {}:
     {}]],
       {
         c(1, {
-          i(nil, '_1'),
-          i(nil, '_2'),
-          i(nil, '_3'),
-          { i(1, '_4'), t(', '), i(2, '_5') },
+          i(nil, 'i'),
+          i(nil, 'k'),
+          i(nil, 'v'),
+          { i(1, 'k'), t(', '), i(2, 'v') },
         }),
         d(2, function(_, parent)
           local index = ul.choice_index(parent.nodes[2])
@@ -47,7 +47,7 @@ for {} in {}:
             })[index])
           )
         end, { 1 }),
-        ul.visual_dynamic_node(3),
+        ul.visual_isn(3),
       }
     )
   ),

users/jrpotter/neovim/config/utils/luasnip.lua

@@ -3,7 +3,7 @@ local M = {}
 local luasnip = require('luasnip')
 local types = require('luasnip.util.types')
 
-function M.visual_dynamic_node(pos)
+function M.visual_isn(pos)
   local f = luasnip.function_node
   local isn = luasnip.indent_snippet_node