feat(roslyn_ls): add initial config as `vim.lsp.config` #3753

1 files changed, 186 insertions, 0 deletions

diff --git a/lsp/roslyn_ls.lua b/lsp/roslyn_ls.lua
new file mode 100644
index 00000000..c3cc2eed
--- /dev/null
+++ b/lsp/roslyn_ls.lua
@@ -0,0 +1,186 @@
+---@brief
+---
+--- https://github.com/dotnet/roslyn
+--
+-- To install the server, compile from source or download as nuget package.
+-- Go to `https://dev.azure.com/azure-public/vside/_artifacts/feed/vs-impl/NuGet/Microsoft.CodeAnalysis.LanguageServer.<platform>/overview`
+-- replace `<platform>` with one of the following `linux-x64`, `osx-x64`, `win-x64`, `neutral` (for more info on the download location see https://github.com/dotnet/roslyn/issues/71474#issuecomment-2177303207).
+-- Download and extract it (nuget's are zip files).
+-- - if you chose `neutral` nuget version, then you have to change the `cmd` like so:
+--   cmd = {
+--     'dotnet',
+--     '<my_folder>/Microsoft.CodeAnalysis.LanguageServer.dll',
+--     '--logLevel', -- this property is required by the server
+--     'Information',
+--     '--extensionLogDirectory', -- this property is required by the server
+--     fs.joinpath(uv.os_tmpdir(), 'roslyn_ls/logs'),
+--     '--stdio',
+--   },
+--   where `<my_folder>` has to be the folder you extracted the nuget package to.
+-- - for all other platforms put the extracted folder to neovim's PATH (`vim.env.PATH`)
+
+local uv = vim.uv
+local fs = vim.fs
+
+---@param client vim.lsp.Client
+---@param target string
+local function on_init_sln(client, target)
+  vim.notify('Initializing: ' .. target, vim.log.levels.INFO, { title = 'roslyn_ls' })
+  ---@diagnostic disable-next-line: param-type-mismatch
+  client:notify('solution/open', {
+    solution = vim.uri_from_fname(target),
+  })
+end
+
+---@param client vim.lsp.Client
+---@param project_files string[]
+local function on_init_project(client, project_files)
+  vim.notify('Initializing: projects', vim.log.levels.INFO, { title = 'roslyn_ls' })
+  ---@diagnostic disable-next-line: param-type-mismatch
+  client:notify('project/open', {
+    projects = vim.tbl_map(function(file)
+      return vim.uri_from_fname(file)
+    end, project_files),
+  })
+end
+
+local function roslyn_handlers()
+  return {
+    ['workspace/projectInitializationComplete'] = function(_, _, ctx)
+      vim.notify('Roslyn project initialization complete', vim.log.levels.INFO, { title = 'roslyn_ls' })
+
+      local buffers = vim.lsp.get_buffers_by_client_id(ctx.client_id)
+      for _, buf in ipairs(buffers) do
+        vim.lsp.util._refresh('textDocument/diagnostic', { bufnr = buf })
+      end
+    end,
+    ['workspace/_roslyn_projectHasUnresolvedDependencies'] = function()
+      vim.notify('Detected missing dependencies. Run `dotnet restore` command.', vim.log.levels.ERROR, {
+        title = 'roslyn_ls',
+      })
+      return vim.NIL
+    end,
+    ['workspace/_roslyn_projectNeedsRestore'] = function(_, result, ctx)
+      local client = assert(vim.lsp.get_client_by_id(ctx.client_id))
+
+      ---@diagnostic disable-next-line: param-type-mismatch
+      client:request('workspace/_roslyn_restore', result, function(err, response)
+        if err then
+          vim.notify(err.message, vim.log.levels.ERROR, { title = 'roslyn_ls' })
+        end
+        if response then
+          for _, v in ipairs(response) do
+            vim.notify(v.message, vim.log.levels.INFO, { title = 'roslyn_ls' })
+          end
+        end
+      end)
+
+      return vim.NIL
+    end,
+    ['razor/provideDynamicFileInfo'] = function(_, _, _)
+      vim.notify(
+        'Razor is not supported.\nPlease use https://github.com/tris203/rzls.nvim',
+        vim.log.levels.WARN,
+        { title = 'roslyn_ls' }
+      )
+      return vim.NIL
+    end,
+  }
+end
+
+---@type vim.lsp.ClientConfig
+return {
+  name = 'roslyn_ls',
+  offset_encoding = 'utf-8',
+  cmd = {
+    'Microsoft.CodeAnalysis.LanguageServer',
+    '--logLevel',
+    'Information',
+    '--extensionLogDirectory',
+    fs.joinpath(uv.os_tmpdir(), 'roslyn_ls/logs'),
+    '--stdio',
+  },
+  filetypes = { 'cs' },
+  handlers = roslyn_handlers(),
+  root_dir = function(bufnr, cb)
+    local bufname = vim.api.nvim_buf_get_name(bufnr)
+    -- don't try to find sln or csproj for files from libraries
+    -- outside of the project
+    if not bufname:match('^' .. fs.joinpath('/tmp/MetadataAsSource/')) then
+      -- try find solutions root first
+      local root_dir = fs.root(bufnr, function(fname, _)
+        return fname:match('%.sln$') ~= nil
+      end)
+
+      if not root_dir then
+        -- try find projects root
+        root_dir = fs.root(bufnr, function(fname, _)
+          return fname:match('%.csproj$') ~= nil
+        end)
+      end
+
+      if root_dir then
+        cb(root_dir)
+      end
+    end
+  end,
+  on_init = {
+    function(client)
+      local root_dir = client.config.root_dir
+
+      -- try load first solution we find
+      for entry, type in vim.fs.dir(root_dir) do
+        if type == 'file' and vim.endswith(entry, '.sln') then
+          on_init_sln(client, entry)
+          return
+        end
+      end
+
+      -- if no solution is found load project
+      for entry, type in vim.fs.dir(root_dir) do
+        if type == 'file' and vim.endswith(entry, '.csproj') then
+          on_init_project(client, { entry })
+        end
+      end
+    end,
+  },
+  capabilities = {
+    -- HACK: Doesn't show any diagnostics if we do not set this to true
+    textDocument = {
+      diagnostic = {
+        dynamicRegistration = true,
+      },
+    },
+  },
+  settings = {
+    ['csharp|background_analysis'] = {
+      dotnet_analyzer_diagnostics_scope = 'fullSolution',
+      dotnet_compiler_diagnostics_scope = 'fullSolution',
+    },
+    ['csharp|inlay_hints'] = {
+      csharp_enable_inlay_hints_for_implicit_object_creation = true,
+      csharp_enable_inlay_hints_for_implicit_variable_types = true,
+      csharp_enable_inlay_hints_for_lambda_parameter_types = true,
+      csharp_enable_inlay_hints_for_types = true,
+      dotnet_enable_inlay_hints_for_indexer_parameters = true,
+      dotnet_enable_inlay_hints_for_literal_parameters = true,
+      dotnet_enable_inlay_hints_for_object_creation_parameters = true,
+      dotnet_enable_inlay_hints_for_other_parameters = true,
+      dotnet_enable_inlay_hints_for_parameters = true,
+      dotnet_suppress_inlay_hints_for_parameters_that_differ_only_by_suffix = true,
+      dotnet_suppress_inlay_hints_for_parameters_that_match_argument_name = true,
+      dotnet_suppress_inlay_hints_for_parameters_that_match_method_intent = true,
+    },
+    ['csharp|symbol_search'] = {
+      dotnet_search_reference_assemblies = true,
+    },
+    ['csharp|completion'] = {
+      dotnet_show_name_completion_suggestions = true,
+      dotnet_show_completion_items_from_unimported_namespaces = true,
+      dotnet_provide_regex_completions = true,
+    },
+    ['csharp|code_lens'] = {
+      dotnet_enable_references_code_lens = true,
+    },
+  },
+}