[clangd] XPC transport layer

- New transport layer for macOS.
- XPC Framework
- Test client

Framework and client were written by Alex Lorenz.

Differential Revision: https://reviews.llvm.org/D54428

4 files changed, 22 insertions, 2 deletions

diff --git a/clang-tools-extra/test/CMakeLists.txt b/clang-tools-extra/test/CMakeLists.txt
index 451c181fdf0..adeb0368f89 100644
--- a/clang-tools-extra/test/CMakeLists.txt
+++ b/clang-tools-extra/test/CMakeLists.txt
@@ -16,7 +16,8 @@ endif ()
 string(REPLACE ${CMAKE_CFG_INTDIR} ${LLVM_BUILD_MODE} CLANG_TOOLS_DIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
 
 llvm_canonicalize_cmake_booleans(
-  CLANG_ENABLE_STATIC_ANALYZER)
+  CLANG_ENABLE_STATIC_ANALYZER
+  CLANGD_BUILD_XPC_SUPPORT)
 
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.in
@@ -61,7 +62,11 @@ set(CLANG_TOOLS_TEST_DEPS
   clang-headers
 
   clang-tidy
-  )
+)
+
+if(CLANGD_BUILD_XPC_SUPPORT)
+  list(APPEND CLANG_TOOLS_TEST_DEPS clangd-xpc-test-client)
+endif()
 
 set(CLANGD_TEST_DEPS
   clangd
diff --git a/clang-tools-extra/test/clangd/xpc/initialize.test b/clang-tools-extra/test/clangd/xpc/initialize.test
new file mode 100644
index 00000000000..44bef65b12f
--- /dev/null
+++ b/clang-tools-extra/test/clangd/xpc/initialize.test
@@ -0,0 +1,10 @@
+# RUN: clangd-xpc-test-client < %s | FileCheck %s
+# REQUIRES: clangd-xpc-support
+
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootUri":"test:///workspace","capabilities":{},"trace":"off"}}
+# CHECK: {"id":0,"jsonrpc":"2.0","result":{"capabilities"
+
+{"jsonrpc":"2.0","id":3,"method":"shutdown"}
+# CHECK: {"id":3,"jsonrpc":"2.0","result":null}
+
+{"jsonrpc":"2.0","method":"exit"}
diff --git a/clang-tools-extra/test/lit.cfg b/clang-tools-extra/test/lit.cfg
index 8f8ebaf9898..7fe56f7f204 100644
--- a/clang-tools-extra/test/lit.cfg
+++ b/clang-tools-extra/test/lit.cfg
@@ -117,6 +117,10 @@ if not platform.system() in ['Windows'] or not execute_external:
 if platform.system() not in ['Windows']:
     config.available_features.add('ansi-escape-sequences')
 
+# XPC support for Clangd.
+if config.clangd_xpc_support:
+    config.available_features.add('clangd-xpc-support')
+
 if config.clang_staticanalyzer:
     config.available_features.add('static-analyzer')
 
diff --git a/clang-tools-extra/test/lit.site.cfg.in b/clang-tools-extra/test/lit.site.cfg.in
index bf33b1513ec..d71ca188a67 100644
--- a/clang-tools-extra/test/lit.site.cfg.in
+++ b/clang-tools-extra/test/lit.site.cfg.in
@@ -11,6 +11,7 @@ config.clang_libs_dir = "@SHLIBDIR@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.target_triple = "@TARGET_TRIPLE@"
 config.clang_staticanalyzer = @CLANG_ENABLE_STATIC_ANALYZER@
+config.clangd_xpc_support = @CLANGD_BUILD_XPC_SUPPORT@
 
 # Support substitution of the tools and libs dirs with user parameters. This is
 # used when we can't determine the tool dir at configuration time.