90 lines
2.9 KiB
C++
90 lines
2.9 KiB
C++
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <iostream>
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#include <sstream>
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#include "base/file_util.h"
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#include "base/strings/string_split.h"
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#include "base/strings/string_util.h"
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#include "tools/gn/err.h"
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#include "tools/gn/filesystem_utils.h"
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#include "tools/gn/functions.h"
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#include "tools/gn/input_file.h"
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#include "tools/gn/parse_tree.h"
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#include "tools/gn/scheduler.h"
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namespace functions {
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const char kWriteFile[] = "write_file";
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const char kWriteFile_Help[] =
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"write_file: Write a file to disk.\n"
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"\n"
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" write_file(filename, data)\n"
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"\n"
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" If data is a list, the list will be written one-item-per-line with no\n"
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" quoting or brackets.\n"
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"\n"
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" TODO(brettw) we probably need an optional third argument to control\n"
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" list formatting.\n"
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"\n"
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"Arguments:\n"
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"\n"
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" filename\n"
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" Filename to write. This must be within the output directory.\n"
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"\n"
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" data:\n"
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" The list or string to write.\n";
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Value RunWriteFile(Scope* scope,
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const FunctionCallNode* function,
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const std::vector<Value>& args,
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Err* err) {
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if (args.size() != 2) {
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*err = Err(function->function(), "Wrong number of args to write_file",
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"I expected two arguments.");
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return Value();
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}
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// Compute the file name and make sure it's in the output dir.
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if (!args[0].VerifyTypeIs(Value::STRING, err))
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return Value();
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const SourceDir& cur_dir = SourceDirForFunctionCall(function);
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SourceFile source_file = cur_dir.ResolveRelativeFile(args[0].string_value());
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if (!EnsureStringIsInOutputDir(
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scope->settings()->build_settings()->build_dir(),
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source_file.value(), args[0], err))
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return Value();
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// Compute output.
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std::ostringstream contents;
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if (args[1].type() == Value::LIST) {
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const std::vector<Value>& list = args[1].list_value();
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for (size_t i = 0; i < list.size(); i++)
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contents << list[i].ToString() << std::endl;
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} else {
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contents << args[1].ToString();
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}
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// Write file, creating the directory if necessary.
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base::FilePath file_path =
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scope->settings()->build_settings()->GetFullPath(source_file);
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const std::string& contents_string = contents.str();
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if (!file_util::CreateDirectory(file_path.DirName())) {
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*err = Err(function->function(), "Unable to create directory.",
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"I was using \"" + FilePathToUTF8(file_path.DirName()) + "\".");
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return Value();
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}
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if (file_util::WriteFile(file_path,
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contents_string.c_str(), contents_string.size())
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!= static_cast<int>(contents_string.size())) {
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*err = Err(function->function(), "Unable to write file.",
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"I was writing \"" + FilePathToUTF8(file_path) + "\".");
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return Value();
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}
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return Value();
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}
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} // namespace functions
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