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

1 files changed, 14 insertions, 7 deletions

diff --git a/lua/nvim-lsp-installer/servers/clangd/init.lua b/lua/nvim-lsp-installer/servers/clangd/init.lua
index 6028af24..d5bba9f8 100644
--- a/lua/nvim-lsp-installer/servers/clangd/init.lua
+++ b/lua/nvim-lsp-installer/servers/clangd/init.lua
@@ -1,17 +1,24 @@
 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 platform = require "nvim-lsp-installer.platform"
+local Data = require "nvim-lsp-installer.data"
+local std = require "nvim-lsp-installer.installers.std"
 
-local root_dir = server.get_server_root_path "c-family"
+local root_dir = server.get_server_root_path "clangd"
+
+local VERSION = "12.0.1"
+
+local target = Data.coalesce(
+    Data.when(platform.is_mac, "clangd-mac-%s.zip"),
+    Data.when(platform.is_unix, "clangd-linux-%s.zip"),
+    Data.when(platform.is_win, "clangd-windows-%s.zip")
+):format(VERSION)
 
 return server.Server:new {
     name = "clangd",
     root_dir = root_dir,
-    installer = installers.when {
-        unix = zx.file "./install.mjs",
-    },
+    installer = std.unzip_remote(("https://github.com/clangd/clangd/releases/download/%s/%s"):format(VERSION, target)),
     default_options = {
-        cmd = { path.concat { root_dir, "clangd", "bin", "clangd" } },
+        cmd = { path.concat { root_dir, ("clangd_%s"):format(VERSION), "bin", "clangd" } },
     },
 }