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/gyp_script_target_writer.h"
6
7 #include "tools/gn/builder_record.h"
8 #include "tools/gn/err.h"
9 #include "tools/gn/file_template.h"
10 #include "tools/gn/filesystem_utils.h"
11 #include "tools/gn/settings.h"
12 #include "tools/gn/target.h"
13
14 // Write script targets as GYP actions that just invoke Ninja. This allows us
15 // to not have to worry about duplicating the precise GN script execution
16 // semantices in GYP for each platform (GYP varies a bit).
17
GypScriptTargetWriter(const TargetGroup & group,const Toolchain * toolchain,const SourceDir & gyp_dir,std::ostream & out)18 GypScriptTargetWriter::GypScriptTargetWriter(const TargetGroup& group,
19 const Toolchain* toolchain,
20 const SourceDir& gyp_dir,
21 std::ostream& out)
22 : GypTargetWriter(group.debug->item()->AsTarget(), toolchain,
23 gyp_dir, out) {
24 }
25
~GypScriptTargetWriter()26 GypScriptTargetWriter::~GypScriptTargetWriter() {
27 }
28
Run()29 void GypScriptTargetWriter::Run() {
30 int indent = 4;
31 std::string name = helper_.GetNameForTarget(target_);
32
33 // Put the ninja build for this script target in this directory.
34 SourceDir ninja_dir(GetTargetOutputDir(target_).value() + name + "_ninja/");
35
36 Indent(indent) << "{\n";
37
38 Indent(indent + kExtraIndent) << "'target_name': '" << name << "',\n";
39 Indent(indent + kExtraIndent) << "'type': 'none',\n";
40 Indent(indent + kExtraIndent) << "'actions': [{\n";
41
42 Indent(indent + kExtraIndent * 2) << "'action_name': '" << name
43 << " action',\n";
44
45 Indent(indent + kExtraIndent * 2) << "'action': [\n";
46 Indent(indent + kExtraIndent * 3) << "'ninja',\n";
47 Indent(indent + kExtraIndent * 3) << "'-C', '";
48 path_output_.WriteDir(out_, ninja_dir, PathOutput::DIR_NO_LAST_SLASH);
49 out_ << "',\n";
50 Indent(indent + kExtraIndent * 3) << "'" << name << "',\n";
51 Indent(indent + kExtraIndent * 2) << "],\n";
52
53 WriteActionInputs(indent + kExtraIndent * 2);
54 WriteActionOutputs(indent + kExtraIndent * 2);
55
56 Indent(indent + kExtraIndent) << "}],\n";
57 Indent(indent) << "},\n";
58 }
59
WriteActionInputs(int indent)60 void GypScriptTargetWriter::WriteActionInputs(int indent) {
61 Indent(indent) << "'inputs': [\n";
62
63 // Write everything that should be considered an input for dependency
64 // purposes, which is all sources as well as the prereqs.
65 const Target::FileList& sources = target_->sources();
66 for (size_t i = 0; i < sources.size(); i++) {
67 Indent(indent + kExtraIndent) << "'";
68 path_output_.WriteFile(out_, sources[i]);
69 out_ << "',\n";
70 }
71
72 const Target::FileList& prereqs = target_->source_prereqs();
73 for (size_t i = 0; i < prereqs.size(); i++) {
74 Indent(indent + kExtraIndent) << "'";
75 path_output_.WriteFile(out_, prereqs[i]);
76 out_ << "',\n";
77 }
78
79 Indent(indent) << "],\n";
80 }
81
WriteActionOutputs(int indent)82 void GypScriptTargetWriter::WriteActionOutputs(int indent) {
83 Indent(indent) << "'outputs': [\n";
84
85 const Target::FileList& sources = target_->sources();
86 if (sources.empty()) {
87 // Just write outputs directly if there are no sources.
88 const Target::FileList& output = target_->script_values().outputs();
89 for (size_t output_i = 0; output_i < output.size(); output_i++) {
90 Indent(indent + kExtraIndent) << "'";
91 path_output_.WriteFile(out_, output[output_i]);
92 out_ << "',\n";
93 }
94 } else {
95 // There are sources, the outputs should be a template to apply to each.
96 FileTemplate output_template = FileTemplate::GetForTargetOutputs(target_);
97
98 std::vector<std::string> output;
99 for (size_t source_i = 0; source_i < sources.size(); source_i++) {
100 output_template.ApplyString(sources[source_i].value(), &output);
101 for (size_t output_i = 0; output_i < output.size(); output_i++) {
102 Indent(indent + kExtraIndent) << "'";
103 path_output_.WriteFile(out_, SourceFile(output[output_i]));
104 out_ << "',\n";
105 }
106 }
107 }
108
109 Indent(indent) << "],\n";
110 }
111