rewrite some installers for broader cross-platform support (#85)

- Remove all usage of zx in favour of native Lua (via libuv)
- Introduce new set of `std` installers

The following servers will have to be reinstalled due to this change:
1. clangd
2. solargraph
3. sumneko_lua
4. tailwindcss

2 files changed, 14 insertions, 27 deletions

diff --git a/lua/nvim-lsp-installer/servers/texlab/init.lua b/lua/nvim-lsp-installer/servers/texlab/init.lua
index c669806b..a28b4273 100644
--- a/lua/nvim-lsp-installer/servers/texlab/init.lua
+++ b/lua/nvim-lsp-installer/servers/texlab/init.lua
@@ -1,23 +1,26 @@
 local server = require "nvim-lsp-installer.server"
-local installers = require "nvim-lsp-installer.installers"
 local path = require "nvim-lsp-installer.path"
-local zx = require "nvim-lsp-installer.installers.zx"
+local std = require "nvim-lsp-installer.installers.std"
+local Data = require "nvim-lsp-installer.data"
+local platform = require "nvim-lsp-installer.platform"
 
 local root_dir = server.get_server_root_path "latex"
 
+local VERSION = "v3.2.0"
+
+local target = Data.coalesce(
+    Data.when(platform.is_mac, "texlab-x86_64-macos.tar.gz"),
+    Data.when(platform.is_unix, "texlab-x86_64-linux.tar.gz"),
+    Data.when(platform.is_win, "texlab-x86_64-windows.tar.gz")
+)
+
 return server.Server:new {
     name = "texlab",
     root_dir = root_dir,
-    installer = installers.when {
-        unix = zx.file "./install.mjs",
+    installer = {
+        std.ensure_executables { "pdflatex" },
+        std.untargz_remote(("https://github.com/latex-lsp/texlab/releases/download/%s/%s"):format(VERSION, target)),
     },
-    pre_install_check = function()
-        if vim.fn.executable "wget" ~= 1 then
-            error "Missing wget. Please, refer to https://www.gnu.org/software/wget/ to install it."
-        elseif vim.fn.executable "pdflatex" ~= 1 then
-            error "The program pdflatex wasn't found. Please install a TeX distribution: https://www.latex-project.org/get/#tex-distributions"
-        end
-    end,
     default_options = {
         cmd = { path.concat { root_dir, "texlab" } },
     },
diff --git a/lua/nvim-lsp-installer/servers/texlab/install.mjs b/lua/nvim-lsp-installer/servers/texlab/install.mjs
deleted file mode 100644
index bc7fefe1..00000000
--- a/lua/nvim-lsp-installer/servers/texlab/install.mjs
+++ /dev/null
@@ -1,16 +0,0 @@
-const VERSION = "v3.2.0";
-
-const platform = os.platform();
-
-const target = (() => {
-    switch (platform) {
-        case "darwin":
-            return `https://github.com/latex-lsp/texlab/releases/download/${VERSION}/texlab-x86_64-macos.tar.gz`;
-        default:
-            return `https://github.com/latex-lsp/texlab/releases/download/${VERSION}/texlab-x86_64-linux.tar.gz`;
-    }
-})();
-
-await $`wget -O texlab.tar.gz ${target}`;
-await $`tar xf texlab.tar.gz`;
-await $`rm texlab.tar.gz`;