Jan SvobodaandMichael Spencer
6029005938
While the source code isn't supposed to change during a build, in some environments it does. This adds an option that disables caching of stat failures, meaning that source files can be added to the build during scanning. This adds a `-no-cache-negative-stats` option to clang-scan-deps to enable this behavior. There are no tests for clang-scan-deps as there's no reliable way to do so from it. A unit test has been added that modifies the filesystem between scans to test it. Co-authored-by: Michael Spencer <bigcheesegs@gmail.com>
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//===- DependencyScanningService.cpp - Scanning Service -------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/DependencyScanning/DependencyScanningService.h"
|
|
|
|
#include "llvm/Support/Chrono.h"
|
|
#include "llvm/Support/Process.h"
|
|
|
|
using namespace clang;
|
|
using namespace dependencies;
|
|
|
|
bool dependencies::shouldCacheNegativeStatsDefault() {
|
|
if (std::optional<std::string> MaybeNegStats =
|
|
llvm::sys::Process::GetEnv("CLANG_SCAN_CACHE_NEGATIVE_STATS")) {
|
|
if (MaybeNegStats->empty())
|
|
return true;
|
|
return llvm::StringSwitch<bool>(*MaybeNegStats)
|
|
.Case("1", true)
|
|
.Case("0", false)
|
|
.Default(false);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Negative caching directories can cause build failures due to incorrectly
|
|
// configured projects.
|
|
bool dependencies::shouldCacheNegativeStatsForPath(StringRef Path) {
|
|
StringRef Ext = llvm::sys::path::extension(Path);
|
|
if (Ext.empty())
|
|
return false;
|
|
if (Ext == ".framework")
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
DependencyScanningServiceOptions::DependencyScanningServiceOptions()
|
|
: MakeVFS([] { return llvm::vfs::createPhysicalFileSystem(); }),
|
|
BuildSessionTimestamp(
|
|
llvm::sys::toTimeT(std::chrono::system_clock::now())) {}
|