OLD | NEW |
(Empty) | |
| 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/file_util.h" |
| 6 #include "tools/gn/err.h" |
| 7 #include "tools/gn/filesystem_utils.h" |
| 8 #include "tools/gn/functions.h" |
| 9 #include "tools/gn/input_conversion.h" |
| 10 #include "tools/gn/input_file.h" |
| 11 #include "tools/gn/scheduler.h" |
| 12 |
| 13 // TODO(brettw) consider removing this. I originally wrote it for making the |
| 14 // WebKit bindings but misundersood what was required, and didn't need to |
| 15 // use this. This seems to have a high potential for misuse. |
| 16 |
| 17 /* |
| 18 read_file: Read a file into a variable. |
| 19 |
| 20 read_file(filename, how_to_read) |
| 21 |
| 22 Whitespace will be trimmed from the end of the file. Throws an error if the |
| 23 file can not be opened. |
| 24 |
| 25 Arguments: |
| 26 |
| 27 filename: |
| 28 Filename to read, relative to the build file. |
| 29 |
| 30 input_conversion: |
| 31 Controls how the file is read and parsed. See "help input_conversion". |
| 32 |
| 33 Example: |
| 34 |
| 35 lines = read_file("foo.txt", "list lines") |
| 36 */ |
| 37 Value ExecuteReadFile(Scope* scope, |
| 38 const FunctionCallNode* function, |
| 39 const std::vector<Value>& args, |
| 40 Err* err) { |
| 41 if (args.size() != 2) { |
| 42 *err = Err(function->function(), "Wrong number of args to read_file", |
| 43 "I expected two arguments."); |
| 44 return Value(); |
| 45 } |
| 46 if (!args[0].VerifyTypeIs(Value::STRING, err)) |
| 47 return Value(); |
| 48 |
| 49 // Compute the file name. |
| 50 const SourceDir& cur_dir = SourceDirForFunctionCall(function); |
| 51 SourceFile source_file = cur_dir.ResolveRelativeFile(args[0].string_value()); |
| 52 base::FilePath file_path = |
| 53 scope->settings()->build_settings()->GetFullPath(source_file); |
| 54 |
| 55 // Ensure that everything is recomputed if the read file changes. |
| 56 g_scheduler->AddGenDependency(source_file); |
| 57 |
| 58 // Read contents. |
| 59 std::string file_contents; |
| 60 if (!file_util::ReadFileToString(file_path, &file_contents)) { |
| 61 *err = Err(args[0], "Could not read file.", |
| 62 "I resolved this to \"" + FilePathToUTF8(file_path) + "\"."); |
| 63 return Value(); |
| 64 } |
| 65 |
| 66 return ConvertInputToValue(file_contents, function, args[1], err); |
| 67 } |
OLD | NEW |