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8db11fd059
Added a new API, swift::driver::createCompilerInvocation. This takes an array of driver arguments, constructs a Driver and a Compilation, and then uses the Compilation's frontend arguments to create a CompilerInvocation. This works by forcing Driver to create a Compilation which contains a single compile command. (It achieves this by passing "-force-single-frontend-invocation" after all other arguments.) This approach roughly matches Clang's clang::createInvocationFromCommandLine. As implied by the namespacing, this lives in swiftDriver. As a result, swiftDriver now depends on swiftFrontend. In support of this, added a couple of driver diagnostics for exceptional error cases (where Driver produced something other than a single Command, or if that Command is not a frontend command). This fixes <rdar://problem/16125395>. Swift SVN r20972
88 lines
3.2 KiB
C++
88 lines
3.2 KiB
C++
//===--- FrontendUtil.cpp - Driver Utilities for Frontend -----------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Driver/FrontendUtil.h"
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#include "swift/AST/DiagnosticsDriver.h"
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#include "swift/Driver/Action.h"
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#include "swift/Driver/Compilation.h"
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#include "swift/Driver/Driver.h"
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#include "swift/Driver/Job.h"
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#include "swift/Driver/Tool.h"
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#include "swift/Frontend/Frontend.h"
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using namespace swift;
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using namespace swift::driver;
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typedef llvm::DenseSet<const Command *> CommandSet;
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static void collectCompileCommands(const JobList &source, CommandSet &outCmds) {
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for (const Job *J : source) {
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if (const Command *Cmd = dyn_cast<Command>(J)) {
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if (isa<CompileJobAction>(Cmd->getSource()))
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outCmds.insert(Cmd);
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collectCompileCommands(Cmd->getInputs(), outCmds);
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}
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else if (const JobList *JL = dyn_cast<JobList>(J))
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collectCompileCommands(*JL, outCmds);
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}
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}
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std::unique_ptr<CompilerInvocation>
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swift::driver::createCompilerInvocation(ArrayRef<const char *> ArgList,
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DiagnosticEngine &Diags) {
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SmallVector<const char *, 16> Args;
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Args.push_back("<swiftc>"); // FIXME: Remove dummy argument.
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Args.insert(Args.end(), ArgList.begin(), ArgList.end());
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// When creating a CompilerInvocation, ensure that the driver creates a single
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// frontend command.
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Args.push_back("-force-single-frontend-invocation");
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// Force the driver into batch mode by specifying "swiftc" as the name.
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Driver TheDriver("swiftc", "swiftc", Diags);
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// Don't check for the existence of input files, since the user of the
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// CompilerInvocation may wish to remap inputs to source buffers.
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TheDriver.setCheckInputFilesExist(false);
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std::unique_ptr<Compilation> C = TheDriver.buildCompilation(Args);
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if (!C || C->getJobs().empty())
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return nullptr; // Don't emit an error; one should already have been emitted
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CommandSet CompileCommands;
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collectCompileCommands(C->getJobs(), CompileCommands);
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if (CompileCommands.size() != 1) {
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// TODO: include Jobs in the diagnostic.
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Diags.diagnose(SourceLoc(), diag::error_expected_one_frontend_job);
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return nullptr;
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}
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const Command *Cmd = *CompileCommands.begin();
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if (Cmd->getCreator().getName() != "swift") {
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Diags.diagnose(SourceLoc(), diag::error_expected_frontend_command);
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return nullptr;
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}
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std::unique_ptr<CompilerInvocation> Invocation(new CompilerInvocation());
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const llvm::opt::ArgStringList &BaseFrontendArgs = Cmd->getArguments();
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ArrayRef<const char *> FrontendArgs =
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llvm::makeArrayRef(BaseFrontendArgs.data() + 1,
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BaseFrontendArgs.data() + BaseFrontendArgs.size());
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if (Invocation->parseArgs(FrontendArgs, Diags))
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return nullptr; // Don't emit an error; one should already have been emitted
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return Invocation;
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}
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