build: download busted from own neovim/deps repository

Downloading the necessary files all at once instead of doing dependency
handling with luarocks speeds up installation immensely. We speed up the
process even more by using luv as a replacement for the C modules in the
busted dependencies, which allows us to skip costly compilation times.

Co-authored-by: bfredl <bjorn.linse@gmail.com>

CMakeLists.txt

@@ -316,3 +316,15 @@ ExternalProject_Add(uncrustify
   EXCLUDE_FROM_ALL TRUE)
 
 include(BuildLuarocks)
+
+ExternalProject_Add(busted
+  URL https://github.com/neovim/deps/raw/41d2f1b92aef964c8cb86985768702571e190e96/opt/busted-2.1.1.tar.gz
+  URL_HASH SHA256=9b23efce883ad25a3fe140598a32ab89ecc73f4c3d998cb937293d88e5b4c645
+  DOWNLOAD_NO_PROGRESS TRUE
+  DOWNLOAD_DIR ${DEPS_DOWNLOAD_DIR}/busted
+  SOURCE_DIR ${DEPS_SHARE_DIR}
+  CONFIGURE_COMMAND ""
+  BUILD_COMMAND ""
+  INSTALL_COMMAND ""
+  EXCLUDE_FROM_ALL TRUE)
+add_dependencies(test_deps busted)

cmake/BuildLuarocks.cmake

@@ -89,10 +89,8 @@ function(Download ROCK VER)
 endfunction()
 
 if(WIN32)
-  set(BUSTED_EXE "${DEPS_BIN_DIR}/busted.bat")
   set(LUACHECK_EXE "${DEPS_BIN_DIR}/luacheck.bat")
 else()
-  set(BUSTED_EXE "${DEPS_BIN_DIR}/busted")
   set(LUACHECK_EXE "${DEPS_BIN_DIR}/luacheck")
 endif()
 
@@ -100,9 +98,6 @@ add_custom_target(test_deps)
 
 Download(luacheck 1.1.0-1 ${LUACHECK_EXE})
 
-Download(busted 2.1.1 ${BUSTED_EXE})
-add_dependencies(test_deps busted)
-
 if(PREFER_LUA)
   Download(coxpcall 1.17.0-1)
   add_dependencies(test_deps coxpcall)

cmake/Deps.cmake

@@ -1,6 +1,7 @@
 set(DEPS_INSTALL_DIR "${CMAKE_BINARY_DIR}/usr")
 set(DEPS_BIN_DIR "${DEPS_INSTALL_DIR}/bin")
 set(DEPS_LIB_DIR "${DEPS_INSTALL_DIR}/lib")
+set(DEPS_SHARE_DIR "${DEPS_INSTALL_DIR}/share/lua/5.1")
 
 set(DEPS_BUILD_DIR "${CMAKE_BINARY_DIR}/build")
 set(DEPS_DOWNLOAD_DIR "${DEPS_BUILD_DIR}/downloads")

src/nvim/lua/executor.c

@@ -140,8 +140,8 @@ void nlua_error(lua_State *const lstate, const char *const msg)
   }
 
   if (in_script) {
-    os_errmsg(str);
-    os_errmsg("\n");
+    fprintf(stderr, msg, (int)len, str);
+    fprintf(stderr, "\n");
   } else {
     msg_ext_set_kind("lua_error");
     semsg_multiline(msg, (int)len, str);

test/busted_runner.lua

@@ -4,4 +4,61 @@ local suffix = (platform and platform.sysname:lower():find'windows') and '.dll'
 package.path = deps_install_dir.."/share/lua/5.1/?.lua;"..deps_install_dir.."/share/lua/5.1/?/init.lua;"..package.path
 package.cpath = deps_install_dir.."/lib/lua/5.1/?"..suffix..";"..package.cpath;
 
+local uv = vim.uv
+
+local system = {}
+package.loaded['system.core'] = system
+function system.monotime()
+  uv.update_time()
+  return uv.now()*1e-3
+end
+function system.gettime()
+  local sec, usec = uv.gettimeofday()
+  return sec+usec*1e-6
+end
+function system.sleep(sec)
+  uv.sleep(sec*1e3)
+end
+
+local term = {}
+package.loaded['term.core'] = term
+function term.isatty(_)
+  return uv.guess_handle(1) == 'tty'
+end
+
+local lfs = {}
+package.loaded['lfs'] = lfs
+
+function lfs.attributes(path, attr)
+  if attr == 'mode' then
+    local stat = uv.fs_stat(path)
+    return stat and stat.type or ''
+  else
+    error('not implemented')
+  end
+end
+
+function lfs.currentdir()
+  return uv.cwd()
+end
+
+function lfs.chdir(dir)
+  local status, err = pcall(uv.chdir, dir)
+  if status then
+    return true
+  else
+    return nil, err
+  end
+end
+
+function lfs.dir(path)
+  local fs = uv.fs_scandir(path)
+  return function()
+    if not fs then
+      return
+    end
+    return uv.fs_scandir_next(fs)
+  end
+end
+
 require 'busted.runner'({ standalone = false })