nvim/cmp: load snippets per filetype

.config/nvim/ftplugin/go.lua

@@ -1 +1,17 @@
 vim.bo.expandtab = false
+
+do
+    local luasnip = require("luasnip")
+    local s = luasnip.snippet
+    local t = luasnip.text_node
+    local cr = function() return t { "", "" } end
+    local i = luasnip.insert_node
+
+    luasnip.add_snippets("go", {
+        s("ie", {
+            t("if err != nil {"), cr(),
+            t("\t"), i(0), cr(),
+            t("}"),
+        }),
+    })
+end

.config/nvim/ftplugin/haskell.lua

@@ -3,3 +3,7 @@ opts.matchit_let_in()
 
 vim.bo.shiftwidth = 2
 vim.bo.expandtab = true
+
+local luasnip = require("luasnip")
+local haskell_snippets = require("haskell-snippets").all
+luasnip.add_snippets("haskell", haskell_snippets, { key = "haskell" })

.config/nvim/ftplugin/typst.lua

@@ -7,3 +7,30 @@ vim.keymap.set("n", "<leader>f", function()
     vim.cmd([[silent exec "%!typstyle -c 100"]])
     vim.fn.winrestview(saved)
 end, { desc = "ft(typst): Format with typstyle" })
+
+do
+    local luasnip = require("luasnip")
+    local s = luasnip.snippet
+    local t = luasnip.text_node
+    local cr = function() return t { "", "" } end
+    local i = luasnip.insert_node
+    local f = luasnip.function_node
+
+    local function show_date_typst_entry() return os.date('"%Y-%m-%d %H:%M:%S"') end
+    luasnip.add_snippets("typst", {
+        s("entry", {
+            t("#entry("),
+            f(show_date_typst_entry),
+            t { ")[", "" },
+            t("  "),
+            i(0),
+            t { "", "]" },
+        }),
+        s("lang", {
+            t('#set text(lang: "'),
+            i(0),
+            t('")'),
+            cr(),
+        }),
+    })
+end

.config/nvim/plugin/cmp.lua

@@ -28,132 +28,24 @@ local has_words_before = function()
     return col ~= 0 and vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col, col):match("%s") == nil
 end
 
------------------
--- Lazy loader --
------------------
-require("luasnip.loaders.from_vscode").lazy_load { paths = { "./snippets" } }
-
-----------
--- Init --
-----------
 luasnip.setup { update_events = { "TextChanged", "TextChangedI" } }
 
------------
--- Typst --
------------
-local function show_date_typst_entry() return os.date('"%Y-%m-%d %H:%M:%S"') end
-luasnip.add_snippets("typst", {
-    s("entry", {
-        t("#entry("),
-        f(show_date_typst_entry),
-        t { ")[", "" },
-        t("  "),
-        i(0),
-        t { "", "]" },
-    }),
-    s("lang", {
-        t('#set text(lang: "'),
-        i(0),
-        t('")'),
-        cr(),
-    }),
-})
-
-local function get_cms()
-    assert(vim.bo.commentstring ~= "", "comment string is not set")
-    local left = vim.bo.commentstring:gsub("%s*%%s.*", "")
-    local right = vim.bo.commentstring:gsub(".*%%s%s*", "")
-    if right == "" then
-        right = left
-    end
-    return { left = left, right = right }
-end
-local function horizon(args)
-    local cms = get_cms()
-    local chr = cms.left:sub(-1)
-    local len = vim.fn.strdisplaywidth(args[1][1])
-
-    local acc = cms.left
-    for _ = cms.left:len(), len + cms.right:len() + 1, 1 do
-        acc = acc .. chr
-    end
-    acc = acc .. cms.right
-
-    return acc
-end
-local function left()
-    local cms = get_cms()
-    return cms.left .. " "
-end
-local function right()
-    local cms = get_cms()
-    return " " .. cms.right
-end
-
--- stylua: ignore start
-luasnip.add_snippets("all", {
-    s("banner", {
-        f(horizon, { 1 }), cr(),
-        f(left), i(1), f(right), cr(),
-        f(horizon, { 1 }),
-    }),
-})
--- stylua: ignore end
-
--------------
--- Haskell --
--------------
-local haskell_snippets = require("haskell-snippets").all
-luasnip.add_snippets("haskell", haskell_snippets, { key = "haskell" })
-
-------------
--- Golang --
-------------
--- stylua: ignore start
-luasnip.add_snippets("go", {
-    s("ie", {
-        t("if err != nil {"), cr(),
-        t("\t"), i(0), cr(),
-        t("}"),
-    }),
-})
--- stylua: ignore end
-
----------------
--- Setup CMP --
----------------
-local of_filetype = function(fts)
-    local ft = vim.bo.filetype
-    for _, v in ipairs(fts) do
-        if v == ft then
-            return true
-        end
-    end
-    return false
-end
-
 cmp.setup {
     snippet = {
         expand = function(args) luasnip.lsp_expand(args.body) end,
     },
     mapping = cmp.mapping.preset.insert(),
+    -- TODO: how can I make some take precedence of others?
     sources = {
         { name = "luasnip" },
         { name = "nvim_lsp" },
         { name = "path" },
-        {
-            name = "buffer",
-            keyword_length = 10,
-            option = {
-                enable_in_context = function() return of_filetype { "tex", "markdown", "typst" } end,
-            },
-        },
+        { name = "buffer" },
         {
             name = "spell",
-            keyword_length = 10,
+            keyword_length = 10, -- PERF:
             option = {
                 keep_all_entries = true,
-                enable_in_context = function() return of_filetype { "tex", "markdown", "typst" } end,
             },
         },
     },