feat: expose configs

1 files changed, 80 insertions, 0 deletions

diff --git a/lua/lspconfig/server_configurations/rust_analyzer.lua b/lua/lspconfig/server_configurations/rust_analyzer.lua
new file mode 100644
index 00000000..cd8c3aad
--- /dev/null
+++ b/lua/lspconfig/server_configurations/rust_analyzer.lua
@@ -0,0 +1,80 @@
+local util = require 'lspconfig/util'
+
+local function reload_workspace(bufnr)
+  bufnr = util.validate_bufnr(bufnr)
+  vim.lsp.buf_request(bufnr, 'rust-analyzer/reloadWorkspace', nil, function(err)
+    if err then
+      error(tostring(err))
+    end
+    vim.notify 'Cargo workspace reloaded'
+  end)
+end
+
+return {
+  default_config = {
+    cmd = { 'rust-analyzer' },
+    filetypes = { 'rust' },
+    root_dir = function(fname)
+      local cargo_crate_dir = util.root_pattern 'Cargo.toml'(fname)
+      local cmd = { 'cargo', 'metadata', '--no-deps', '--format-version', '1' }
+      if cargo_crate_dir ~= nil then
+        cmd[#cmd + 1] = '--manifest-path'
+        cmd[#cmd + 1] = util.path.join(cargo_crate_dir, 'Cargo.toml')
+      end
+      local cargo_metadata = ''
+      local cargo_metadata_err = ''
+      local cm = vim.fn.jobstart(cmd, {
+        on_stdout = function(_, d, _)
+          cargo_metadata = table.concat(d, '\n')
+        end,
+        on_stderr = function(_, d, _)
+          cargo_metadata_err = table.concat(d, '\n')
+        end,
+        stdout_buffered = true,
+        stderr_buffered = true,
+      })
+      if cm > 0 then
+        cm = vim.fn.jobwait({ cm })[1]
+      else
+        cm = -1
+      end
+      local cargo_workspace_dir = nil
+      if cm == 0 then
+        cargo_workspace_dir = vim.fn.json_decode(cargo_metadata)['workspace_root']
+      else
+        vim.notify(
+          string.format('cmd [%q] failed:\n%s', table.concat(cmd, ' '), cargo_metadata_err),
+          vim.log.levels.Warning
+        )
+      end
+      return cargo_workspace_dir
+        or cargo_crate_dir
+        or util.root_pattern 'rust-project.json'(fname)
+        or util.find_git_ancestor(fname)
+    end,
+    settings = {
+      ['rust-analyzer'] = {},
+    },
+  },
+  commands = {
+    CargoReload = {
+      function()
+        reload_workspace(0)
+      end,
+      description = 'Reload current cargo workspace',
+    },
+  },
+  docs = {
+    package_json = 'https://raw.githubusercontent.com/rust-analyzer/rust-analyzer/master/editors/code/package.json',
+    description = [[
+https://github.com/rust-analyzer/rust-analyzer
+
+rust-analyzer (aka rls 2.0), a language server for Rust
+
+See [docs](https://github.com/rust-analyzer/rust-analyzer/tree/master/docs/user#settings) for extra settings.
+    ]],
+    default_config = {
+      root_dir = [[root_pattern("Cargo.toml", "rust-project.json")]],
+    },
+  },
+}