blob: 38f4686485606502db137b7f51a56b286d8551ce [file] [log] [blame]
// Copyright 2019 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 "gn/ninja_rust_binary_target_writer.h"
#include <sstream>
#include "base/strings/string_util.h"
#include "gn/deps_iterator.h"
#include "gn/filesystem_utils.h"
#include "gn/general_tool.h"
#include "gn/ninja_target_command_util.h"
#include "gn/ninja_utils.h"
#include "gn/rust_substitution_type.h"
#include "gn/substitution_writer.h"
#include "gn/target.h"
namespace {
// Returns the proper escape options for writing compiler and linker flags.
EscapeOptions GetFlagOptions() {
EscapeOptions opts;
opts.mode = ESCAPE_NINJA_COMMAND;
return opts;
}
void WriteVar(const char* name,
const std::string& value,
EscapeOptions opts,
std::ostream& out) {
out << name << " = ";
EscapeStringToStream(out, value, opts);
out << std::endl;
}
void WriteCrateVars(const Target* target,
const Tool* tool,
EscapeOptions opts,
std::ostream& out) {
WriteVar(kRustSubstitutionCrateName.ninja_name,
target->rust_values().crate_name(), opts, out);
std::string crate_type;
switch (target->rust_values().crate_type()) {
// Auto-select the crate type for executables, static libraries, and rlibs.
case RustValues::CRATE_AUTO: {
switch (target->output_type()) {
case Target::EXECUTABLE:
crate_type = "bin";
break;
case Target::STATIC_LIBRARY:
crate_type = "staticlib";
break;
case Target::RUST_LIBRARY:
crate_type = "rlib";
break;
case Target::RUST_PROC_MACRO:
crate_type = "proc-macro";
break;
default:
NOTREACHED();
}
break;
}
case RustValues::CRATE_BIN:
crate_type = "bin";
break;
case RustValues::CRATE_CDYLIB:
crate_type = "cdylib";
break;
case RustValues::CRATE_DYLIB:
crate_type = "dylib";
break;
case RustValues::CRATE_PROC_MACRO:
crate_type = "proc-macro";
break;
case RustValues::CRATE_RLIB:
crate_type = "rlib";
break;
case RustValues::CRATE_STATICLIB:
crate_type = "staticlib";
break;
default:
NOTREACHED();
}
WriteVar(kRustSubstitutionCrateType.ninja_name, crate_type, opts, out);
WriteVar(SubstitutionOutputExtension.ninja_name,
SubstitutionWriter::GetLinkerSubstitution(
target, tool, &SubstitutionOutputExtension),
opts, out);
WriteVar(SubstitutionOutputDir.ninja_name,
SubstitutionWriter::GetLinkerSubstitution(target, tool,
&SubstitutionOutputDir),
opts, out);
}
} // namespace
NinjaRustBinaryTargetWriter::NinjaRustBinaryTargetWriter(const Target* target,
std::ostream& out)
: NinjaBinaryTargetWriter(target, out),
tool_(target->toolchain()->GetToolForTargetFinalOutputAsRust(target)) {}
NinjaRustBinaryTargetWriter::~NinjaRustBinaryTargetWriter() = default;
// TODO(juliehockett): add inherited library support? and IsLinkable support?
// for c-cross-compat
void NinjaRustBinaryTargetWriter::Run() {
DCHECK(target_->output_type() != Target::SOURCE_SET);
size_t num_stamp_uses = target_->sources().size();
std::vector<OutputFile> input_deps = WriteInputsStampAndGetDep(
num_stamp_uses);
WriteCompilerVars();
// Classify our dependencies.
ClassifiedDeps classified_deps = GetClassifiedDeps();
// The input dependencies will be an order-only dependency. This will cause
// Ninja to make sure the inputs are up to date before compiling this source,
// but changes in the inputs deps won't cause the file to be recompiled. See
// the comment on NinjaCBinaryTargetWriter::Run for more detailed explanation.
std::vector<OutputFile> order_only_deps = WriteInputDepsStampAndGetDep(
std::vector<const Target*>(), num_stamp_uses);
std::copy(input_deps.begin(), input_deps.end(),
std::back_inserter(order_only_deps));
// Build lists which will go into different bits of the rustc command line.
// Public rust_library deps go in a --extern rlibs, public non-rust deps go in
// -Ldependency. Also assemble a list of extra (i.e. implicit) deps
// for ninja dependency tracking.
UniqueVector<OutputFile> implicit_deps;
AppendSourcesAndInputsToImplicitDeps(&implicit_deps);
implicit_deps.Append(classified_deps.extra_object_files.begin(),
classified_deps.extra_object_files.end());
std::vector<OutputFile> rustdeps;
std::vector<OutputFile> nonrustdeps;
nonrustdeps.insert(nonrustdeps.end(),
classified_deps.extra_object_files.begin(),
classified_deps.extra_object_files.end());
for (const auto* framework_dep : classified_deps.framework_deps) {
order_only_deps.push_back(framework_dep->dependency_output_file());
}
for (const auto* non_linkable_dep : classified_deps.non_linkable_deps) {
if (non_linkable_dep->source_types_used().RustSourceUsed() &&
non_linkable_dep->output_type() != Target::SOURCE_SET) {
rustdeps.push_back(non_linkable_dep->dependency_output_file());
}
order_only_deps.push_back(non_linkable_dep->dependency_output_file());
}
for (const auto* linkable_dep : classified_deps.linkable_deps) {
if (linkable_dep->source_types_used().RustSourceUsed()) {
rustdeps.push_back(linkable_dep->link_output_file());
} else {
nonrustdeps.push_back(linkable_dep->link_output_file());
}
implicit_deps.push_back(linkable_dep->dependency_output_file());
}
// Rust libraries specified by paths.
for (ConfigValuesIterator iter(target_); !iter.done(); iter.Next()) {
const ConfigValues& cur = iter.cur();
for (const auto& e : cur.externs()) {
if (e.second.is_source_file()) {
implicit_deps.push_back(
OutputFile(settings_->build_settings(), e.second.source_file()));
}
}
}
// Bubble up the full list of transitive rlib dependencies.
std::vector<OutputFile> transitive_rustlibs;
for (const auto* dep :
target_->rust_values().transitive_libs().GetOrdered()) {
if (dep->source_types_used().RustSourceUsed()) {
transitive_rustlibs.push_back(dep->dependency_output_file());
}
}
std::vector<OutputFile> tool_outputs;
SubstitutionWriter::ApplyListToLinkerAsOutputFile(
target_, tool_, tool_->outputs(), &tool_outputs);
WriteCompilerBuildLine({target_->rust_values().crate_root()},
implicit_deps.vector(), order_only_deps, tool_->name(),
tool_outputs);
std::vector<const Target*> extern_deps(
classified_deps.linkable_deps.vector());
std::copy(classified_deps.non_linkable_deps.begin(),
classified_deps.non_linkable_deps.end(),
std::back_inserter(extern_deps));
WriteExterns(extern_deps);
WriteRustdeps(transitive_rustlibs, rustdeps, nonrustdeps);
WriteSourcesAndInputs();
}
void NinjaRustBinaryTargetWriter::WriteCompilerVars() {
const SubstitutionBits& subst = target_->toolchain()->substitution_bits();
EscapeOptions opts = GetFlagOptions();
WriteCrateVars(target_, tool_, opts, out_);
WriteOneFlag(target_, &kRustSubstitutionRustFlags, false, Tool::kToolNone,
&ConfigValues::rustflags, opts, path_output_, out_);
WriteOneFlag(target_, &kRustSubstitutionRustEnv, false, Tool::kToolNone,
&ConfigValues::rustenv, opts, path_output_, out_);
WriteSharedVars(subst);
}
void NinjaRustBinaryTargetWriter::AppendSourcesAndInputsToImplicitDeps(
UniqueVector<OutputFile>* deps) const {
// Only the crate_root file needs to be given to rustc as input.
// Any other 'sources' are just implicit deps.
// Most Rust targets won't bother specifying the "sources =" line
// because it is handled sufficiently by crate_root and the generation
// of depfiles by rustc. But for those which do...
for (const auto& source : target_->sources()) {
deps->push_back(OutputFile(settings_->build_settings(), source));
}
for (const auto& data : target_->config_values().inputs()) {
deps->push_back(OutputFile(settings_->build_settings(), data));
}
}
void NinjaRustBinaryTargetWriter::WriteSourcesAndInputs() {
out_ << " sources =";
for (const auto& source : target_->sources()) {
out_ << " ";
path_output_.WriteFile(out_, OutputFile(settings_->build_settings(), source));
}
for (const auto& data : target_->config_values().inputs()) {
out_ << " ";
path_output_.WriteFile(out_, OutputFile(settings_->build_settings(), data));
}
out_ << std::endl;
}
void NinjaRustBinaryTargetWriter::WriteExterns(
const std::vector<const Target*>& deps) {
out_ << " externs =";
for (const Target* target : deps) {
if (target->output_type() == Target::RUST_LIBRARY ||
target->output_type() == Target::RUST_PROC_MACRO) {
out_ << " --extern ";
const auto& renamed_dep =
target_->rust_values().aliased_deps().find(target->label());
if (renamed_dep != target_->rust_values().aliased_deps().end()) {
out_ << renamed_dep->second << "=";
} else {
out_ << std::string(target->rust_values().crate_name()) << "=";
}
path_output_.WriteFile(out_, target->dependency_output_file());
}
}
EscapeOptions extern_escape_opts;
extern_escape_opts.mode = ESCAPE_NINJA_COMMAND;
for (ConfigValuesIterator iter(target_); !iter.done(); iter.Next()) {
const ConfigValues& cur = iter.cur();
for (const auto& e : cur.externs()) {
out_ << " --extern " << std::string(e.first) << "=";
if (e.second.is_source_file()) {
path_output_.WriteFile(out_, e.second.source_file());
} else {
EscapeStringToStream(out_, e.second.value(), extern_escape_opts);
}
}
}
out_ << std::endl;
}
void NinjaRustBinaryTargetWriter::WriteRustdeps(
const std::vector<OutputFile>& transitive_rustdeps,
const std::vector<OutputFile>& rustdeps,
const std::vector<OutputFile>& nonrustdeps) {
out_ << " rustdeps =";
// Rust dependencies.
UniqueVector<SourceDir> transitive_rustdep_dirs;
for (const auto& rustdep : transitive_rustdeps) {
// TODO switch to using --extern priv: after stabilization
transitive_rustdep_dirs.push_back(
rustdep.AsSourceFile(settings_->build_settings()).GetDir());
}
for (const auto& rustdepdir : transitive_rustdep_dirs) {
out_ << " -Ldependency=";
path_output_.WriteDir(out_, rustdepdir, PathOutput::DIR_NO_LAST_SLASH);
}
EscapeOptions lib_escape_opts;
lib_escape_opts.mode = ESCAPE_NINJA_COMMAND;
// Non-Rust native dependencies.
UniqueVector<SourceDir> nonrustdep_dirs;
for (const auto& nonrustdep : nonrustdeps) {
nonrustdep_dirs.push_back(
nonrustdep.AsSourceFile(settings_->build_settings()).GetDir());
}
// First -Lnative to specify the search directories.
// This is necessary for #[link(...)] directives to work properly.
for (const auto& nonrustdep_dir : nonrustdep_dirs) {
out_ << " -Lnative=";
path_output_.WriteDir(out_, nonrustdep_dir, PathOutput::DIR_NO_LAST_SLASH);
}
for (const auto& nonrustdep : nonrustdeps) {
out_ << " -Clink-arg=";
path_output_.WriteFile(out_, nonrustdep);
}
WriteLinkerFlags(out_, tool_, nullptr);
WriteLibs(out_, tool_);
out_ << std::endl;
}