Introduce llgoi, a REPL for Go

llgoi is a Go REPL based on llgo irgen and the LLVM JIT. It supports
expressions, statements, most declarations and imports, including binary
imports from the standard library and source imports from $GOPATH.

Differential Revision: http://reviews.llvm.org/D6957

llvm-svn: 226097

llgo/CMakeLists.txt

@@ -39,12 +39,6 @@ llvm_add_go_executable(llgo llvm.org/llgo/cmd/gllgo ALL DEPENDS
   ssaopt/esc.go
 )
 
-install(FILES ${CMAKE_BINARY_DIR}/bin/llgo${CMAKE_EXECUTABLE_SUFFIX}
-        DESTINATION bin
-        PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
-                    GROUP_READ GROUP_EXECUTE
-                    WORLD_READ WORLD_EXECUTE)
-
 llvm_add_go_executable(llgo-stage2 llvm.org/llgo/cmd/gllgo
   DEPENDS libgo ${CMAKE_BINARY_DIR}/bin/llgo${CMAKE_EXECUTABLE_SUFFIX}
   GOFLAGS "cc=${CMAKE_BINARY_DIR}/bin/clang"
@@ -63,6 +57,22 @@ llvm_add_go_executable(cc-wrapper llvm.org/llgo/cmd/cc-wrapper DEPENDS
   cmd/cc-wrapper/main.go
 )
 
+llvm_add_go_executable(llgoi llvm.org/llgo/cmd/llgoi
+  DEPENDS libgo ${CMAKE_BINARY_DIR}/bin/llgo${CMAKE_EXECUTABLE_SUFFIX}
+          cmd/llgoi/isatty_posix.go
+          cmd/llgoi/llgoi.go
+  GOFLAGS "cc=${CMAKE_BINARY_DIR}/bin/clang"
+          "cxx=${CMAKE_BINARY_DIR}/bin/clang++"
+          "llgo=${CMAKE_BINARY_DIR}/bin/llgo${CMAKE_EXECUTABLE_SUFFIX}"
+)
+
+install(FILES ${CMAKE_BINARY_DIR}/bin/llgo${CMAKE_EXECUTABLE_SUFFIX}
+              ${CMAKE_BINARY_DIR}/bin/llgoi${CMAKE_EXECUTABLE_SUFFIX}
+        DESTINATION bin
+        PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE
+                    GROUP_READ GROUP_EXECUTE
+                    WORLD_READ WORLD_EXECUTE)
+
 function(add_clobber_steps name)
   ExternalProject_Add_Step(${name} force-reconfigure
     DEPENDERS configure

llgo/cmd/llgoi/isatty_posix.go

@@ -0,0 +1,29 @@
+//===- isatty_posix.go - isatty implementation for POSIX ------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements isatty for POSIX systems.
+//
+//===----------------------------------------------------------------------===//
+
+package main
+
+// +build !windows
+
+/*
+#include <unistd.h>
+*/
+import "C"
+
+import (
+	"os"
+)
+
+func isatty(file *os.File) bool {
+	return C.isatty(C.int(file.Fd())) != 0
+}