feat: an extra for mini.snippets. First version, WIP

lua/lazyvim/plugins/extras/coding/mini-snippets.lua

@@ -0,0 +1,117 @@
+--[[
+
+This extra for mini.snippets activates the following:
+1. During completion with either cmp or blink, expand lsp snippets
+2. To use other snippets: Press <c-j> in insert mode
+
+Note that there is no completion source. 
+Other snippets(custom or from friendly-snippets) are handled by pressing <c-j> in insert mode.
+
+In default LazyVim, neither cmp nor blink define the default mappings used by mini.snippets
+For now, pressing tab and shift-tab inside a snippet just inserts a tab
+
+-- TODO: Find a way to incorporate user defined mappings including super-tab
+-- TODO: Find a way to more easily support lang_patterns for snippets.gen_loader.from_lang
+--]]
+local function expand(args)
+  ---@diagnostic disable-next-line: undefined-global
+  local insert = MiniSnippets.config.expand.insert or MiniSnippets.default_insert
+  insert({ body = args.body }) -- insert at cursor
+end
+
+local snippet_select_for_cmp = function(snippets, insert, opts)
+  local cmp = require("cmp")
+  if cmp.visible() then
+    cmp.close()
+  end
+
+  MiniSnippets.default_select(snippets, insert, opts)
+end
+local snippet_select_for_blink = function(snippets, insert, opts)
+  -- Blink's cancel uses vim.schedule!
+  require("blink.cmp").cancel()
+
+  -- Schedule, otherwise blink's virtual text is not removed on vim.ui.select
+  vim.schedule(function()
+    MiniSnippets.default_select(snippets, insert, opts)
+  end)
+end
+local snippet_select_without_completion_engine = function(snippets, insert, opts)
+  MiniSnippets.default_select(snippets, insert, opts)
+end
+local snippet_select = snippet_select_without_completion_engine
+
+return {
+  -- disable builtin snippet support
+  { "garymjr/nvim-snippets", optional = true, enabled = false },
+  -- disable luasnip:
+  { "L3MON4D3/LuaSnip", optional = true, enabled = false },
+
+  -- add mini.snippets
+  desc = "Manage and expand snippets (alternative for luasnip), currently in beta",
+  {
+    "echasnovski/mini.snippets",
+    event = "InsertEnter",
+    dependencies = {
+      {
+        "rafamadriz/friendly-snippets",
+      },
+    },
+    opts = function()
+      -- Unset snippet_forward. Handled by mini.snippets:
+      LazyVim.cmp.actions.snippet_forward = nil
+
+      ---Dummy snippet_stop, only needed because "esc" is overriden. See keymaps.lua
+      ---@diagnostic disable-next-line: duplicate-set-field
+      LazyVim.cmp.actions.snippet_stop = function() end
+
+      local snippets = require("mini.snippets")
+      return {
+        snippets = {
+          snippets.gen_loader.from_lang(),
+        },
+        expand = {
+          select = function(...)
+            snippet_select(...) -- close completion windows on snippet select
+          end,
+        },
+      }
+    end,
+  },
+
+  -- nvim-cmp integration: Use mini.snippets to expand snippets from lsp
+  {
+    "hrsh7th/nvim-cmp",
+    init = function()
+      snippet_select = snippet_select_for_cmp
+    end,
+    optional = true,
+    opts = function(_, opts)
+      opts.snippet = {
+        expand = function(args)
+          expand(args) -- provide snippet expansion for lsp
+        end,
+      }
+    end,
+  },
+
+  -- blink.cmp integration: Use mini.snippets to expand snippets from lsp
+  {
+    "saghen/blink.cmp",
+    init = function()
+      snippet_select = snippet_select_for_blink
+    end,
+    optional = true,
+    opts = function(_, opts)
+      opts.snippets = {
+        expand = function(snippet)
+          expand({ body = snippet }) -- provide snippet expansion for lsp
+        end,
+        active = function()
+          return false -- mini.snippets operates independently
+        end,
+        jump = function() end, -- mini.snippets operates independently
+      }
+    end,
+  },
+}