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//===- tools/dsymutil/CFBundle.cpp - CFBundle helper ------------*- C++ -*-===//
//
// 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 "CFBundle.h"
#ifdef __APPLE__
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
#include <CoreFoundation/CoreFoundation.h>
#include <assert.h>
#include <glob.h>
#include <memory>
#endif
namespace llvm {
namespace dsymutil {
#ifdef __APPLE__
/// Deleter that calls CFRelease rather than deleting the pointer.
template <typename T> struct CFDeleter {
void operator()(T *P) {
if (P)
::CFRelease(P);
}
};
/// This helper owns any CoreFoundation pointer and will call CFRelease() on
/// any valid pointer it owns unless that pointer is explicitly released using
/// the release() member function.
template <typename T>
using CFReleaser = std::unique_ptr<std::remove_pointer_t<T>,
CFDeleter<std::remove_pointer_t<T>>>;
/// RAII wrapper around CFBundleRef.
class CFString : public CFReleaser<CFStringRef> {
public:
CFString(CFStringRef CFStr = nullptr) : CFReleaser<CFStringRef>(CFStr) {}
const char *UTF8(std::string &Str) const {
return CFString::UTF8(get(), Str);
}
CFIndex GetLength() const {
if (CFStringRef Str = get())
return CFStringGetLength(Str);
return 0;
}
static const char *UTF8(CFStringRef CFStr, std::string &Str);
};
/// Static function that puts a copy of the UTF-8 contents of CFStringRef into
/// std::string and returns the C string pointer that is contained in the
/// std::string when successful, nullptr otherwise.
///
/// This allows the std::string parameter to own the extracted string, and also
/// allows that string to be returned as a C string pointer that can be used.
const char *CFString::UTF8(CFStringRef CFStr, std::string &Str) {
if (!CFStr)
return nullptr;
const CFStringEncoding Encoding = kCFStringEncodingUTF8;
CFIndex MaxUTF8StrLength = CFStringGetLength(CFStr);
MaxUTF8StrLength =
CFStringGetMaximumSizeForEncoding(MaxUTF8StrLength, Encoding);
if (MaxUTF8StrLength > 0) {
Str.resize(MaxUTF8StrLength);
if (!Str.empty() &&
CFStringGetCString(CFStr, &Str[0], Str.size(), Encoding)) {
Str.resize(strlen(Str.c_str()));
return Str.c_str();
}
}
return nullptr;
}
/// RAII wrapper around CFBundleRef.
class CFBundle : public CFReleaser<CFBundleRef> {
public:
CFBundle(StringRef Path) : CFReleaser<CFBundleRef>() { SetFromPath(Path); }
CFBundle(CFURLRef Url)
: CFReleaser<CFBundleRef>(Url ? ::CFBundleCreate(nullptr, Url)
: nullptr) {}
/// Return the bundle identifier.
CFStringRef GetIdentifier() const {
if (CFBundleRef bundle = get())
return ::CFBundleGetIdentifier(bundle);
return nullptr;
}
/// Return value for key.
CFTypeRef GetValueForInfoDictionaryKey(CFStringRef key) const {
if (CFBundleRef bundle = get())
return ::CFBundleGetValueForInfoDictionaryKey(bundle, key);
return nullptr;
}
private:
/// Helper to initialize this instance with a new bundle created from the
/// given path. This function will recursively remove components from the
/// path in its search for the nearest Info.plist.
void SetFromPath(StringRef Path);
};
void CFBundle::SetFromPath(StringRef Path) {
// Start from an empty/invalid CFBundle.
reset();
if (Path.empty() || !sys::fs::exists(Path))
return;
SmallString<256> RealPath;
sys::fs::real_path(Path, RealPath, /*expand_tilde*/ true);
do {
// Create a CFURL from the current path and use it to create a CFBundle.
CFReleaser<CFURLRef> BundleURL(::CFURLCreateFromFileSystemRepresentation(
kCFAllocatorDefault, (const UInt8 *)RealPath.data(), RealPath.size(),
false));
reset(::CFBundleCreate(kCFAllocatorDefault, BundleURL.get()));
// If we have a valid bundle and find its identifier we are done.
if (get() != nullptr) {
if (GetIdentifier() != nullptr)
return;
reset();
}
// Remove the last component of the path and try again until there's
// nothing left but the root.
sys::path::remove_filename(RealPath);
} while (RealPath != sys::path::root_name(RealPath));
}
#endif
/// On Darwin, try and find the original executable's Info.plist to extract
/// information about the bundle. Return default values on other platforms.
CFBundleInfo getBundleInfo(StringRef ExePath) {
CFBundleInfo BundleInfo;
#ifdef __APPLE__
auto PrintError = [&](CFTypeID TypeID) {
CFString TypeIDCFStr(::CFCopyTypeIDDescription(TypeID));
std::string TypeIDStr;
errs() << "The Info.plist key \"CFBundleShortVersionString\" is"
<< "a " << TypeIDCFStr.UTF8(TypeIDStr)
<< ", but it should be a string in: " << ExePath << ".\n";
};
CFBundle Bundle(ExePath);
if (CFStringRef BundleID = Bundle.GetIdentifier()) {
CFString::UTF8(BundleID, BundleInfo.IDStr);
if (CFTypeRef TypeRef =
Bundle.GetValueForInfoDictionaryKey(CFSTR("CFBundleVersion"))) {
CFTypeID TypeID = ::CFGetTypeID(TypeRef);
if (TypeID == ::CFStringGetTypeID())
CFString::UTF8((CFStringRef)TypeRef, BundleInfo.VersionStr);
else
PrintError(TypeID);
}
if (CFTypeRef TypeRef = Bundle.GetValueForInfoDictionaryKey(
CFSTR("CFBundleShortVersionString"))) {
CFTypeID TypeID = ::CFGetTypeID(TypeRef);
if (TypeID == ::CFStringGetTypeID())
CFString::UTF8((CFStringRef)TypeRef, BundleInfo.ShortVersionStr);
else
PrintError(TypeID);
}
}
#endif
return BundleInfo;
}
} // end namespace dsymutil
} // end namespace llvm
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