Add configuration for elixir-ls (#243)

1 files changed, 110 insertions, 0 deletions

diff --git a/lua/nvim_lsp/elixirls.lua b/lua/nvim_lsp/elixirls.lua
new file mode 100644
index 00000000..fe1d37e2
--- /dev/null
+++ b/lua/nvim_lsp/elixirls.lua
@@ -0,0 +1,110 @@
+local configs = require 'nvim_lsp/configs'
+local util = require 'nvim_lsp/util'
+
+local server_name = "elixirls"
+local bin_name = "elixir-ls"
+local cmd = "language_server"
+
+if vim.fn.has('mac') == 1 or vim.fn.has('unix') == 1 then
+    cmd = cmd..".sh"
+elseif vim.fn.has('win32') == 1  or vim.fn.has('win64') == 1 then
+    cmd = cmd..".bat"
+else
+    error("System is not supported, try to install manually.")
+    return
+end
+
+local function make_installer()
+    local P = util.path.join
+    local install_dir = P{util.base_install_dir, server_name}
+	local cmd_path = P{install_dir, bin_name, "release", cmd}
+
+    local X = {}
+    function X.install()
+        local install_info = X.info()
+        if install_info.is_installed then
+            print(server_name, "is already installed.")
+            return
+        end
+
+        if not (util.has_bins("elixir") and util.has_bins("erl")) then
+            error("Need elixir and erl to install this")
+            return
+        end
+
+        local script = [=[
+            set -e
+
+            # clone project
+            git clone https://github.com/elixir-lsp/elixir-ls
+            cd elixir-ls
+
+            # fetch dependencies and compile
+            mix deps.get && mix compile
+
+            # install executable
+            mix elixir_ls.release -o release
+        ]=]
+        vim.fn.mkdir(install_info.install_dir, "p")
+        util.sh(script, install_info.install_dir)
+    end
+
+    function X.info()
+        return {
+            is_installed = util.path.exists(cmd_path);
+            install_dir = install_dir;
+            cmd = { cmd_path };
+        }
+    end
+
+    function X.configure(config)
+        local install_info = X.info()
+        if install_info.is_installed then
+            config.cmd = install_info.cmd
+        end
+    end
+    return X
+end
+
+local installer = make_installer()
+
+configs[server_name] = {
+  default_config = {
+    cmd = { cmd };
+    filetypes = {"elixir", "eelixir"};
+    root_dir = function(fname)
+        return util.root_pattern("mix.exs", ".git")(fname) or vim.loop.os_homedir()
+    end;
+    };
+    on_new_config = function(config)
+        installer.configure(config)
+    end;
+    docs = {
+        package_json = "https://raw.githubusercontent.com/JakeBecker/vscode-elixir-ls/master/package.json";
+        description = [[
+https://github.com/elixir-lsp/elixir-ls
+
+`elixir-ls` can be installed via `:LspInstall elixirls` or by yourself by following the instructions [here](https://github.com/elixir-lsp/elixir-ls#building-and-running).
+
+This language server does not provide a global binary, but must be installed manually. The command `:LspInstaller elixirls` makes an attempt at installing the binary by
+Fetching the elixir-ls repository from GitHub, compiling it and then installing it.
+
+```lua
+require'nvim_lsp'.elixirLS.setup{
+    -- Unix
+    cmd = { "path/to/language_server.sh" };
+    -- Windows
+    cmd = { "path/to/language_server.bat" };
+    ...
+}
+```
+]];
+            default_config = {
+                root_dir = [[root_pattern("mix.exs", ".git") or vim.loop.os_homedir()]];
+            };
+    };
+}
+
+configs[server_name].install = installer.install
+configs[server_name].install_info = installer.info
+-- vim:et ts=2 sw=2