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 "tools/gn/script_target_generator.h"
6
7 #include "tools/gn/build_settings.h"
8 #include "tools/gn/err.h"
9 #include "tools/gn/filesystem_utils.h"
10 #include "tools/gn/parse_tree.h"
11 #include "tools/gn/scope.h"
12 #include "tools/gn/value.h"
13 #include "tools/gn/value_extractors.h"
14 #include "tools/gn/variables.h"
15
ScriptTargetGenerator(Target * target,Scope * scope,const FunctionCallNode * function_call,Err * err)16 ScriptTargetGenerator::ScriptTargetGenerator(
17 Target* target,
18 Scope* scope,
19 const FunctionCallNode* function_call,
20 Err* err)
21 : TargetGenerator(target, scope, function_call, err) {
22 }
23
~ScriptTargetGenerator()24 ScriptTargetGenerator::~ScriptTargetGenerator() {
25 }
26
DoRun()27 void ScriptTargetGenerator::DoRun() {
28 target_->set_output_type(Target::CUSTOM);
29
30 FillExternal();
31 if (err_->has_error())
32 return;
33
34 FillSources();
35 if (err_->has_error())
36 return;
37
38 FillSourcePrereqs();
39 if (err_->has_error())
40 return;
41
42 FillScript();
43 if (err_->has_error())
44 return;
45
46 FillScriptArgs();
47 if (err_->has_error())
48 return;
49
50 FillOutputs();
51 if (err_->has_error())
52 return;
53
54 FillDepfile();
55 if (err_->has_error())
56 return;
57
58 // Script outputs don't depend on the current toolchain so we can skip adding
59 // that dependency.
60 }
61
FillScript()62 void ScriptTargetGenerator::FillScript() {
63 // If this gets called, the target type requires a script, so error out
64 // if it doesn't have one.
65 const Value* value = scope_->GetValue(variables::kScript, true);
66 if (!value) {
67 *err_ = Err(function_call_, "This target type requires a \"script\".");
68 return;
69 }
70 if (!value->VerifyTypeIs(Value::STRING, err_))
71 return;
72
73 target_->script_values().set_script(
74 scope_->GetSourceDir().ResolveRelativeFile(value->string_value()));
75 }
76
FillScriptArgs()77 void ScriptTargetGenerator::FillScriptArgs() {
78 const Value* value = scope_->GetValue(variables::kArgs, true);
79 if (!value)
80 return;
81
82 std::vector<std::string> args;
83 if (!ExtractListOfStringValues(*value, &args, err_))
84 return;
85 target_->script_values().swap_in_args(&args);
86 }
87
FillDepfile()88 void ScriptTargetGenerator::FillDepfile() {
89 const Value* value = scope_->GetValue(variables::kDepfile, true);
90 if (!value)
91 return;
92 target_->script_values().set_depfile(
93 scope_->settings()->build_settings()->build_dir().ResolveRelativeFile(
94 value->string_value()));
95 }
96