Revision ad6ef6c1d5ba1434215bf9e891c87f71514446e9 authored by Brad King on 13 November 2018, 15:37:23 UTC, committed by Brad King on 13 November 2018, 15:37:23 UTC
Merge-request: !2601
cmSourceFile.cxx
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmSourceFile.h"
#include <sstream>
#include "cmCustomCommand.h"
#include "cmGlobalGenerator.h"
#include "cmMakefile.h"
#include "cmProperty.h"
#include "cmState.h"
#include "cmSystemTools.h"
#include "cmake.h"
cmSourceFile::cmSourceFile(cmMakefile* mf, const std::string& name,
cmSourceFileLocationKind kind)
: Location(mf, name, kind)
{
this->CustomCommand = nullptr;
this->FindFullPathFailed = false;
}
cmSourceFile::~cmSourceFile()
{
this->SetCustomCommand(nullptr);
}
std::string const& cmSourceFile::GetExtension() const
{
return this->Extension;
}
const std::string cmSourceFile::propLANGUAGE = "LANGUAGE";
void cmSourceFile::SetObjectLibrary(std::string const& objlib)
{
this->ObjectLibrary = objlib;
}
std::string cmSourceFile::GetObjectLibrary() const
{
return this->ObjectLibrary;
}
std::string cmSourceFile::GetLanguage()
{
// If the language was set explicitly by the user then use it.
if (const char* lang = this->GetProperty(propLANGUAGE)) {
return lang;
}
// Perform computation needed to get the language if necessary.
if (this->FullPath.empty() && this->Language.empty()) {
// If a known extension is given or a known full path is given
// then trust that the current extension is sufficient to
// determine the language. This will fail only if the user
// specifies a full path to the source but leaves off the
// extension, which is kind of weird.
if (this->Location.ExtensionIsAmbiguous() &&
this->Location.DirectoryIsAmbiguous()) {
// Finalize the file location to get the extension and set the
// language.
this->GetFullPath();
} else {
// Use the known extension to get the language if possible.
std::string ext =
cmSystemTools::GetFilenameLastExtension(this->Location.GetName());
this->CheckLanguage(ext);
}
}
// Now try to determine the language.
return static_cast<cmSourceFile const*>(this)->GetLanguage();
}
std::string cmSourceFile::GetLanguage() const
{
// If the language was set explicitly by the user then use it.
if (const char* lang = this->GetProperty(propLANGUAGE)) {
return lang;
}
// If the language was determined from the source file extension use it.
if (!this->Language.empty()) {
return this->Language;
}
// The language is not known.
return "";
}
cmSourceFileLocation const& cmSourceFile::GetLocation() const
{
return this->Location;
}
std::string const& cmSourceFile::GetFullPath(std::string* error)
{
if (this->FullPath.empty()) {
if (this->FindFullPath(error)) {
this->CheckExtension();
}
}
return this->FullPath;
}
std::string const& cmSourceFile::GetFullPath() const
{
return this->FullPath;
}
bool cmSourceFile::FindFullPath(std::string* error)
{
// If this method has already failed once do not try again.
if (this->FindFullPathFailed) {
return false;
}
// If the file is generated compute the location without checking on
// disk.
if (this->GetPropertyAsBool("GENERATED")) {
// The file is either already a full path or is relative to the
// build directory for the target.
this->Location.DirectoryUseBinary();
this->FullPath = this->Location.GetDirectory();
this->FullPath += "/";
this->FullPath += this->Location.GetName();
return true;
}
// The file is not generated. It must exist on disk.
cmMakefile const* mf = this->Location.GetMakefile();
const char* tryDirs[3] = { nullptr, nullptr, nullptr };
if (this->Location.DirectoryIsAmbiguous()) {
tryDirs[0] = mf->GetCurrentSourceDirectory().c_str();
tryDirs[1] = mf->GetCurrentBinaryDirectory().c_str();
} else {
tryDirs[0] = "";
}
cmake const* const cmakeInst = mf->GetCMakeInstance();
std::vector<std::string> const& srcExts = cmakeInst->GetSourceExtensions();
std::vector<std::string> const& hdrExts = cmakeInst->GetHeaderExtensions();
for (const char* const* di = tryDirs; *di; ++di) {
std::string tryPath = this->Location.GetDirectory();
if (!tryPath.empty()) {
tryPath += "/";
}
tryPath += this->Location.GetName();
tryPath = cmSystemTools::CollapseFullPath(tryPath, *di);
if (this->TryFullPath(tryPath, "")) {
return true;
}
for (std::string const& ext : srcExts) {
if (this->TryFullPath(tryPath, ext)) {
return true;
}
}
for (std::string const& ext : hdrExts) {
if (this->TryFullPath(tryPath, ext)) {
return true;
}
}
}
std::ostringstream e;
std::string missing = this->Location.GetDirectory();
if (!missing.empty()) {
missing += "/";
}
missing += this->Location.GetName();
e << "Cannot find source file:\n " << missing << "\nTried extensions";
for (std::string const& srcExt : srcExts) {
e << " ." << srcExt;
}
for (std::string const& ext : hdrExts) {
e << " ." << ext;
}
if (error) {
*error = e.str();
} else {
this->Location.GetMakefile()->IssueMessage(cmake::FATAL_ERROR, e.str());
}
this->FindFullPathFailed = true;
return false;
}
bool cmSourceFile::TryFullPath(const std::string& path, const std::string& ext)
{
std::string tryPath = path;
if (!ext.empty()) {
tryPath += ".";
tryPath += ext;
}
if (cmSystemTools::FileExists(tryPath)) {
this->FullPath = tryPath;
return true;
}
return false;
}
void cmSourceFile::CheckExtension()
{
// Compute the extension.
std::string realExt =
cmSystemTools::GetFilenameLastExtension(this->FullPath);
if (!realExt.empty()) {
// Store the extension without the leading '.'.
this->Extension = realExt.substr(1);
}
// Look for object files.
if (this->Extension == "obj" || this->Extension == "o" ||
this->Extension == "lo") {
this->SetProperty("EXTERNAL_OBJECT", "1");
}
// Try to identify the source file language from the extension.
if (this->Language.empty()) {
this->CheckLanguage(this->Extension);
}
}
void cmSourceFile::CheckLanguage(std::string const& ext)
{
// Try to identify the source file language from the extension.
cmMakefile const* mf = this->Location.GetMakefile();
cmGlobalGenerator* gg = mf->GetGlobalGenerator();
std::string l = gg->GetLanguageFromExtension(ext.c_str());
if (!l.empty()) {
this->Language = l;
}
}
bool cmSourceFile::Matches(cmSourceFileLocation const& loc)
{
return this->Location.Matches(loc);
}
void cmSourceFile::SetProperty(const std::string& prop, const char* value)
{
this->Properties.SetProperty(prop, value);
}
void cmSourceFile::AppendProperty(const std::string& prop, const char* value,
bool asString)
{
this->Properties.AppendProperty(prop, value, asString);
}
const char* cmSourceFile::GetPropertyForUser(const std::string& prop)
{
// This method is a consequence of design history and backwards
// compatibility. GetProperty is (and should be) a const method.
// Computed properties should not be stored back in the property map
// but instead reference information already known. If they need to
// cache information in a mutable ivar to provide the return string
// safely then so be it.
//
// The LOCATION property is particularly problematic. The CMake
// language has very loose restrictions on the names that will match
// a given source file (for historical reasons). Implementing
// lookups correctly with such loose naming requires the
// cmSourceFileLocation class to commit to a particular full path to
// the source file as late as possible. If the users requests the
// LOCATION property we must commit now.
if (prop == "LOCATION") {
// Commit to a location.
this->GetFullPath();
}
// Perform the normal property lookup.
return this->GetProperty(prop);
}
const char* cmSourceFile::GetProperty(const std::string& prop) const
{
// Check for computed properties.
if (prop == "LOCATION") {
if (this->FullPath.empty()) {
return nullptr;
}
return this->FullPath.c_str();
}
const char* retVal = this->Properties.GetPropertyValue(prop);
if (!retVal) {
cmMakefile const* mf = this->Location.GetMakefile();
const bool chain =
mf->GetState()->IsPropertyChained(prop, cmProperty::SOURCE_FILE);
if (chain) {
return mf->GetProperty(prop, chain);
}
}
return retVal;
}
const char* cmSourceFile::GetSafeProperty(const std::string& prop) const
{
const char* ret = this->GetProperty(prop);
if (!ret) {
return "";
}
return ret;
}
bool cmSourceFile::GetPropertyAsBool(const std::string& prop) const
{
return cmSystemTools::IsOn(this->GetProperty(prop));
}
cmCustomCommand* cmSourceFile::GetCustomCommand()
{
return this->CustomCommand;
}
cmCustomCommand const* cmSourceFile::GetCustomCommand() const
{
return this->CustomCommand;
}
void cmSourceFile::SetCustomCommand(cmCustomCommand* cc)
{
cmCustomCommand* old = this->CustomCommand;
this->CustomCommand = cc;
delete old;
}
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