add r_language_server (#467)

Closes #185.

Co-authored-by: Olivier Devineau <olivier.devineau@inn.no>
Co-authored-by: William Boman <william@redwill.se>

1 files changed, 51 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/servers/r_language_server/init.lua b/lua/nvim-lsp-installer/servers/r_language_server/init.lua
new file mode 100644
index 00000000..c85107c1
--- /dev/null
+++ b/lua/nvim-lsp-installer/servers/r_language_server/init.lua
@@ -0,0 +1,51 @@
+local server = require "nvim-lsp-installer.server"
+local process = require "nvim-lsp-installer.process"
+local context = require "nvim-lsp-installer.installers.context"
+
+return function(name, root_dir)
+    local function create_install_script(install_dir)
+        return ([[
+options(langserver_library = %q);
+options(repos = list(CRAN = "http://cran.rstudio.com/"));
+rlsLib <- getOption("langserver_library");
+install.packages("languageserversetup", lib = rlsLib);
+loadNamespace("languageserversetup", lib.loc = rlsLib);
+
+languageserversetup::languageserver_install(
+    fullReinstall = TRUE,
+    confirmBeforeInstall = FALSE,
+    strictLibrary = TRUE
+);
+]]):format(install_dir, install_dir, install_dir)
+    end
+
+    local server_script = ([[
+options("langserver_library" = %q);
+rlsLib <- getOption("langserver_library");
+.libPaths(new = rlsLib);
+loadNamespace("languageserver", lib.loc = rlsLib);
+languageserver::run();
+  ]]):format(root_dir)
+
+    return server.Server:new {
+        name = name,
+        root_dir = root_dir,
+        homepage = "https://github.com/REditorSupport/languageserver",
+        languages = { "R" },
+        installer = {
+            function(_, callback, ctx)
+                process.spawn("R", {
+                    cwd = ctx.install_dir,
+                    args = { "-e", create_install_script(ctx.install_dir) },
+                    stdio_sink = ctx.stdio_sink,
+                }, callback)
+            end,
+            context.receipt(function(receipt)
+                receipt:with_primary_source(receipt.r_package "languageserver")
+            end),
+        },
+        default_options = {
+            cmd = { "R", "--slave", "-e", server_script },
+        },
+    }
+end