Revert 214254 "Add initial prototype for the GN meta-buildsystem."

trunk/src/tools/gn/function_toolchain.cc

-// Copyright (c) 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "tools/gn/err.h"
-#include "tools/gn/functions.h"
-#include "tools/gn/parse_tree.h"
-#include "tools/gn/scheduler.h"
-#include "tools/gn/scope.h"
-#include "tools/gn/settings.h"
-#include "tools/gn/toolchain.h"
-
-namespace {
-
-// This is jsut a unique value to take the address of to use as the key for
-// the toolchain property on a scope.
-const int kToolchainPropertyKey = 0;
-
-// Reads the given string from the scope (if present) and puts the result into
-// dest. If the value is not a string, sets the error and returns false.
-bool ReadString(Scope& scope, const char* var, std::string* dest, Err* err) {
-  const Value* v = scope.GetValue(var, true);
-  if (!v)
-    return true;  // Not present is fine.
-
-  if (!v->VerifyTypeIs(Value::STRING, err))
-    return false;
-  *dest = v->string_value();
-  return true;
-}
-
-}  // namespace
-
-Value ExecuteToolchain(Scope* scope,
-                       const FunctionCallNode* function,
-                       const std::vector<Value>& args,
-                       BlockNode* block,
-                       Err* err) {
-  if (!EnsureNotProcessingImport(function, scope, err) ||
-      !EnsureNotProcessingBuildConfig(function, scope, err))
-    return Value();
-
-  // Note that we don't want to use MakeLabelForScope since that will include
-  // the toolchain name in the label, and toolchain labels don't themselves
-  // have toolchain names.
-  const SourceDir& input_dir = SourceDirForFunctionCall(function);
-  Label label(input_dir, args[0].string_value(), SourceDir(), std::string());
-  if (g_scheduler->verbose_logging())
-    g_scheduler->Log("Generating toolchain", label.GetUserVisibleName(true));
-
-  // This object will actually be copied into the one owned by the toolchain
-  // manager, but that has to be done in the lock.
-  Toolchain toolchain(label);
-
-  Scope block_scope(scope);
-  block_scope.SetProperty(&kToolchainPropertyKey, &toolchain);
-  block->ExecuteBlockInScope(&block_scope, err);
-  block_scope.SetProperty(&kToolchainPropertyKey, NULL);
-  if (err->has_error())
-    return Value();
-  if (!block_scope.CheckForUnusedVars(err))
-    return Value();
-
-  const BuildSettings* build_settings = scope->settings()->build_settings();
-  {
-    // Save the toolchain definition in the toolchain manager and mark the
-    // corresponding item in the dependency tree resolved so that targets
-    // that depend on this toolchain know it's ready.
-    base::AutoLock lock(build_settings->item_tree().lock());
-    build_settings->toolchain_manager().SetToolchainDefinitionLocked(
-        toolchain, function->GetRange(), err);
-    build_settings->item_tree().MarkItemGeneratedLocked(label);
-  }
-  return Value();
-}
-
-Value ExecuteTool(Scope* scope,
-                  const FunctionCallNode* function,
-                  const std::vector<Value>& args,
-                  BlockNode* block,
-                  Err* err) {
-  // Find the toolchain definition we're executing inside of. The toolchain
-  // function will set a property pointing to it that we'll pick up.
-  Toolchain* toolchain = reinterpret_cast<Toolchain*>(
-      scope->GetProperty(&kToolchainPropertyKey, NULL));
-  if (!toolchain) {
-    *err = Err(function->function(), "tool() called outside of toolchain().",
-        "The tool() function can only be used inside a toolchain() "
-        "definition.");
-    return Value();
-  }
-
-  if (!EnsureSingleStringArg(function, args, err))
-    return Value();
-  const std::string& tool_name = args[0].string_value();
-  Toolchain::ToolType tool_type = Toolchain::ToolNameToType(tool_name);
-  if (tool_type == Toolchain::TYPE_NONE) {
-    *err = Err(args[0], "Unknown tool type");
-    return Value();
-  }
-
-  // Run the tool block.
-  Scope block_scope(scope);
-  block->ExecuteBlockInScope(&block_scope, err);
-  if (err->has_error())
-    return Value();
-
-  // Extract the stuff we need.
-  Toolchain::Tool t;
-  if (!ReadString(block_scope, "command", &t.command, err) ||
-      !ReadString(block_scope, "depfile", &t.depfile, err) ||
-      !ReadString(block_scope, "deps", &t.deps, err) ||
-      !ReadString(block_scope, "description", &t.description, err) ||
-      !ReadString(block_scope, "pool", &t.pool, err) ||
-      !ReadString(block_scope, "restat", &t.restat, err) ||
-      !ReadString(block_scope, "rspfile", &t.rspfile, err) ||
-      !ReadString(block_scope, "rspfile_content", &t.rspfile_content, err))
-    return Value();
-
-  // Make sure there weren't any vars set in this tool that were unused.
-  if (!block_scope.CheckForUnusedVars(err))
-    return Value();
-
-  toolchain->SetTool(tool_type, t);
-  return Value();
-}