From 48516377705855f280cd6b495fde7d68a447837e Mon Sep 17 00:00:00 2001
From: Noah Masur <7386960+nmasur@users.noreply.github.com>
Date: Sun, 10 Jul 2022 14:15:41 +0000
Subject: [PATCH] conditional lsp servers

---
 modules/editor/neovim/lua/functions.lua       | 11 ---
 modules/editor/neovim/lua/keybinds.lua        | 20 ++--
 modules/editor/neovim/lua/packer/lsp.lua      | 91 ++++++++++++++-----
 modules/editor/neovim/lua/packer/syntax.lua   |  1 +
 .../editor/neovim/lua/packer/telescope.lua    | 13 +++
 5 files changed, 90 insertions(+), 46 deletions(-)

diff --git a/modules/editor/neovim/lua/functions.lua b/modules/editor/neovim/lua/functions.lua
index 4aa4082..5731ba6 100644
--- a/modules/editor/neovim/lua/functions.lua
+++ b/modules/editor/neovim/lua/functions.lua
@@ -26,17 +26,6 @@ find_downloads = function()
     require("telescope").extensions.file_browser.file_browser(opts)
 end
 
-choose_project = function()
-    local opts = require("telescope.themes").get_ivy({
-        layout_config = {
-            bottom_pane = {
-                height = 10,
-            },
-        },
-    })
-    require("telescope").extensions.project.project(opts)
-end
-
 command_history = function()
     local opts = require("telescope.themes").get_ivy({
         layout_config = {
diff --git a/modules/editor/neovim/lua/keybinds.lua b/modules/editor/neovim/lua/keybinds.lua
index 73cb615..89a5cfa 100644
--- a/modules/editor/neovim/lua/keybinds.lua
+++ b/modules/editor/neovim/lua/keybinds.lua
@@ -5,8 +5,7 @@
 -- Function to cut down config boilerplate
 local key = function(mode, key_sequence, action, params)
     params = params or {}
-    params["noremap"] = true
-    vim.api.nvim_set_keymap(mode, key_sequence, action, params)
+    vim.keymap.set(mode, key_sequence, action, params)
 end
 
 -- Remap space as leader key
@@ -34,9 +33,9 @@ key("n", "<Leader>k", ":Telescope keymaps<CR>")
 key("n", "<Leader>/", ":Telescope live_grep<CR>")
 key("n", "<Leader>ff", ":Telescope find_files<CR>")
 key("n", "<Leader>fp", ":Telescope git_files<CR>")
-key("n", "<Leader>fN", "<Cmd>lua find_notes()<CR>")
-key("n", "<Leader>N", "<Cmd>lua grep_notes()<CR>")
-key("n", "<Leader>fD", "<Cmd>lua find_downloads()<CR>")
+key("n", "<Leader>fN", find_notes)
+key("n", "<Leader>N", grep_notes)
+key("n", "<Leader>fD", find_downloads)
 key("n", "<Leader>fa", ":Telescope file_browser<CR>")
 key("n", "<Leader>fw", ":Telescope grep_string<CR>")
 key("n", "<Leader>wt", ":Telescope tmux sessions<CR>")
@@ -48,14 +47,11 @@ key("n", "<Leader>hh", ":Telescope help_tags<CR>")
 key("n", "<Leader>fr", ":Telescope oldfiles<CR>")
 key("n", "<Leader>cc", ":Telescope commands<CR>")
 key("n", "<Leader>cr", "<Cmd>lua command_history()<CR>")
-key("n", "<Leader>y", "<Cmd>lua clipboard_history()<CR>")
-key("i", "<c-y>", "<Cmd>lua clipboard_history()<CR>")
 key("n", "<Leader>s", ":Telescope current_buffer_fuzzy_find<CR>")
 key("n", "<Leader>gc", ":Telescope git_commits<CR>")
 key("n", "<Leader>gf", ":Telescope git_bcommits<CR>")
 key("n", "<Leader>gb", ":Telescope git_branches<CR>")
 key("n", "<Leader>gs", ":Telescope git_status<CR>")
-key("n", "<C-p>", "<Cmd>lua choose_project()<CR>")
 
 -- Buffer tabs (tmux interferes)
 -- key("n", "<C-L>", "gt")
@@ -64,10 +60,10 @@ key("n", "<C-p>", "<Cmd>lua choose_project()<CR>")
 -- key("i", "<C-H>", "<Esc>gT")
 
 -- LSP
-key("n", "gd", "<Cmd>lua vim.lsp.buf.definition()<CR>", { silent = true })
-key("n", "gT", "<Cmd>lua vim.lsp.buf.type_definition()<CR>", { silent = true })
-key("n", "gi", "<Cmd>lua vim.lsp.buf.implementation()<CR>", { silent = true })
-key("n", "gh", "<Cmd>lua vim.lsp.buf.hover()<CR>", { silent = true })
+key("n", "gd", vim.lsp.buf.definition, { silent = true })
+key("n", "gT", vim.lsp.buf.type_definition, { silent = true })
+key("n", "gi", vim.lsp.buf.implementation, { silent = true })
+key("n", "gh", vim.lsp.buf.hover, { silent = true })
 key("n", "gr", "<Cmd>Telescope lsp_references<CR>", { silent = true })
 key("n", "<Leader>R", "<Cmd>lua vim.lsp.buf.rename()<CR>", { silent = true })
 key("n", "]e", "<Cmd>lua vim.diagnostic.goto_next()<CR>", { silent = true })
diff --git a/modules/editor/neovim/lua/packer/lsp.lua b/modules/editor/neovim/lua/packer/lsp.lua
index 47501ab..2ab913a 100644
--- a/modules/editor/neovim/lua/packer/lsp.lua
+++ b/modules/editor/neovim/lua/packer/lsp.lua
@@ -4,6 +4,10 @@
 
 local M = {}
 
+function on_path(program)
+    return vim.fn.executable(program) == 1
+end
+
 M.packer = function(use)
     -- Language server engine
     use({
@@ -13,16 +17,24 @@ M.packer = function(use)
             local capabilities = require("cmp_nvim_lsp").update_capabilities(
                 vim.lsp.protocol.make_client_capabilities()
             )
-            require("lspconfig").rust_analyzer.setup({ capabilities = capabilities })
-            require("lspconfig").tflint.setup({ capabilities = capabilities })
-            require("lspconfig").terraformls.setup({ capabilities = capabilities })
-            require("lspconfig").pyright.setup({
-                on_attach = function()
-                    -- set keymaps (requires 0.7.0)
-                    -- vim.keymap.set("n", "", "", {buffer=0})
-                end,
-                capabilities = capabilities,
-            })
+            if on_path("rust-analyzer") then
+                require("lspconfig").rust_analyzer.setup({ capabilities = capabilities })
+            end
+            if on_path("tflint") then
+                require("lspconfig").tflint.setup({ capabilities = capabilities })
+            end
+            if on_path("terraform-ls") then
+                require("lspconfig").terraformls.setup({ capabilities = capabilities })
+            end
+            if on_path("pyright") then
+                require("lspconfig").pyright.setup({
+                    on_attach = function()
+                        -- set keymaps (requires 0.7.0)
+                        -- vim.keymap.set("n", "", "", {buffer=0})
+                    end,
+                    capabilities = capabilities,
+                })
+            end
         end,
     })
 
@@ -40,16 +52,47 @@ M.packer = function(use)
         config = function()
             require("null-ls").setup({
                 sources = {
-                    require("null-ls").builtins.formatting.stylua,
-                    require("null-ls").builtins.formatting.black,
-                    require("null-ls").builtins.formatting.fish_indent,
-                    require("null-ls").builtins.formatting.nixfmt,
-                    require("null-ls").builtins.formatting.rustfmt,
-                    require("null-ls").builtins.diagnostics.shellcheck,
+                    require("null-ls").builtins.formatting.stylua.with({
+                        condition = function()
+                            return on_path("stylua")
+                        end,
+                    }),
+                    require("null-ls").builtins.formatting.black.with({
+                        condition = function()
+                            return on_path("black")
+                        end,
+                    }),
+                    require("null-ls").builtins.formatting.fish_indent.with({
+                        condition = function()
+                            return on_path("fish_indent")
+                        end,
+                    }),
+                    require("null-ls").builtins.formatting.nixfmt.with({
+                        condition = function()
+                            return on_path("nixfmt")
+                        end,
+                    }),
+                    require("null-ls").builtins.formatting.rustfmt.with({
+                        condition = function()
+                            return on_path("rustfmt")
+                        end,
+                    }),
+                    require("null-ls").builtins.diagnostics.shellcheck.with({
+                        condition = function()
+                            return on_path("shellcheck")
+                        end,
+                    }),
                     require("null-ls").builtins.formatting.shfmt.with({
                         extra_args = { "-i", "4", "-ci" },
+                        condition = function()
+                            return on_path("shfmt")
+                        end,
+                    }),
+                    require("null-ls").builtins.formatting.terraform_fmt.with({
+                        condition = function()
+                            return on_path("terraform")
+                        end,
                     }),
-                    require("null-ls").builtins.formatting.terraform_fmt,
                     -- require("null-ls").builtins.diagnostics.luacheck,
                     -- require("null-ls").builtins.diagnostics.markdownlint,
                     -- require("null-ls").builtins.diagnostics.pylint,
@@ -57,12 +100,14 @@ M.packer = function(use)
                 -- Format on save
                 on_attach = function(client)
                     if client.resolved_capabilities.document_formatting then
-                        vim.cmd([[
-                        augroup LspFormatting
-                            autocmd! * <buffer>
-                            autocmd BufWritePre <buffer> lua vim.lsp.buf.formatting_seq_sync()
-                        augroup END
-                        ]])
+                        local id = vim.api.nvim_create_augroup("LspFormatting", {
+                            clear = true,
+                        })
+                        vim.api.nvim_create_autocmd("BufWritePre", {
+                            group = id,
+                            pattern = "*",
+                            callback = vim.lsp.buf.formatting_seq_sync,
+                        })
                     end
                 end,
             })
diff --git a/modules/editor/neovim/lua/packer/syntax.lua b/modules/editor/neovim/lua/packer/syntax.lua
index d068f80..5a44ec0 100644
--- a/modules/editor/neovim/lua/packer/syntax.lua
+++ b/modules/editor/neovim/lua/packer/syntax.lua
@@ -21,6 +21,7 @@ M.packer = function(use)
                     "yaml",
                     "json",
                 },
+                auto_install = true,
                 highlight = { enable = true },
                 indent = { enable = true },
             })
diff --git a/modules/editor/neovim/lua/packer/telescope.lua b/modules/editor/neovim/lua/packer/telescope.lua
index f28f96e..06b18f7 100644
--- a/modules/editor/neovim/lua/packer/telescope.lua
+++ b/modules/editor/neovim/lua/packer/telescope.lua
@@ -57,6 +57,19 @@ M.packer = function(use)
         requires = { "nvim-telescope/telescope.nvim" },
         config = function()
             require("telescope").load_extension("project")
+
+            choose_project = function()
+                local opts = require("telescope.themes").get_ivy({
+                    layout_config = {
+                        bottom_pane = {
+                            height = 10,
+                        },
+                    },
+                })
+                require("telescope").extensions.project.project(opts)
+            end
+
+            vim.keymap.set("n", "<C-p>", choose_project)
         end,
     })