CMake/Source/cmGeneratorExpression.cxx
2017-06-01 14:19:51 -04:00

389 lines
11 KiB
C++

/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmGeneratorExpression.h"
#include "cmsys/RegularExpression.hxx"
#include <utility>
#include "assert.h"
#include "cmAlgorithms.h"
#include "cmGeneratorExpressionContext.h"
#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorExpressionLexer.h"
#include "cmGeneratorExpressionParser.h"
#include "cmSystemTools.h"
#include "cm_auto_ptr.hxx"
cmGeneratorExpression::cmGeneratorExpression(
const cmListFileBacktrace& backtrace)
: Backtrace(backtrace)
{
}
CM_AUTO_PTR<cmCompiledGeneratorExpression> cmGeneratorExpression::Parse(
std::string const& input)
{
return CM_AUTO_PTR<cmCompiledGeneratorExpression>(
new cmCompiledGeneratorExpression(this->Backtrace, input));
}
CM_AUTO_PTR<cmCompiledGeneratorExpression> cmGeneratorExpression::Parse(
const char* input)
{
return this->Parse(std::string(input ? input : ""));
}
cmGeneratorExpression::~cmGeneratorExpression()
{
}
const char* cmCompiledGeneratorExpression::Evaluate(
cmLocalGenerator* lg, const std::string& config, bool quiet,
const cmGeneratorTarget* headTarget,
cmGeneratorExpressionDAGChecker* dagChecker,
std::string const& language) const
{
return this->Evaluate(lg, config, quiet, headTarget, headTarget, dagChecker,
language);
}
const char* cmCompiledGeneratorExpression::Evaluate(
cmLocalGenerator* lg, const std::string& config, bool quiet,
const cmGeneratorTarget* headTarget, const cmGeneratorTarget* currentTarget,
cmGeneratorExpressionDAGChecker* dagChecker,
std::string const& language) const
{
cmGeneratorExpressionContext context(
lg, config, quiet, headTarget, currentTarget ? currentTarget : headTarget,
this->EvaluateForBuildsystem, this->Backtrace, language);
return this->EvaluateWithContext(context, dagChecker);
}
const char* cmCompiledGeneratorExpression::EvaluateWithContext(
cmGeneratorExpressionContext& context,
cmGeneratorExpressionDAGChecker* dagChecker) const
{
if (!this->NeedsEvaluation) {
return this->Input.c_str();
}
this->Output = "";
std::vector<cmGeneratorExpressionEvaluator*>::const_iterator it =
this->Evaluators.begin();
const std::vector<cmGeneratorExpressionEvaluator*>::const_iterator end =
this->Evaluators.end();
for (; it != end; ++it) {
this->Output += (*it)->Evaluate(&context, dagChecker);
this->SeenTargetProperties.insert(context.SeenTargetProperties.begin(),
context.SeenTargetProperties.end());
if (context.HadError) {
this->Output = "";
break;
}
}
this->MaxLanguageStandard = context.MaxLanguageStandard;
if (!context.HadError) {
this->HadContextSensitiveCondition = context.HadContextSensitiveCondition;
this->HadHeadSensitiveCondition = context.HadHeadSensitiveCondition;
this->SourceSensitiveTargets = context.SourceSensitiveTargets;
}
this->DependTargets = context.DependTargets;
this->AllTargetsSeen = context.AllTargets;
// TODO: Return a std::string from here instead?
return this->Output.c_str();
}
cmCompiledGeneratorExpression::cmCompiledGeneratorExpression(
cmListFileBacktrace const& backtrace, const std::string& input)
: Backtrace(backtrace)
, Input(input)
, HadContextSensitiveCondition(false)
, HadHeadSensitiveCondition(false)
, EvaluateForBuildsystem(false)
{
cmGeneratorExpressionLexer l;
std::vector<cmGeneratorExpressionToken> tokens = l.Tokenize(this->Input);
this->NeedsEvaluation = l.GetSawGeneratorExpression();
if (this->NeedsEvaluation) {
cmGeneratorExpressionParser p(tokens);
p.Parse(this->Evaluators);
}
}
cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression()
{
cmDeleteAll(this->Evaluators);
}
std::string cmGeneratorExpression::StripEmptyListElements(
const std::string& input)
{
if (input.find(';') == std::string::npos) {
return input;
}
std::string result;
result.reserve(input.size());
const char* c = input.c_str();
const char* last = c;
bool skipSemiColons = true;
for (; *c; ++c) {
if (*c == ';') {
if (skipSemiColons) {
result.append(last, c - last);
last = c + 1;
}
skipSemiColons = true;
} else {
skipSemiColons = false;
}
}
result.append(last);
if (!result.empty() && *(result.end() - 1) == ';') {
result.resize(result.size() - 1);
}
return result;
}
static std::string stripAllGeneratorExpressions(const std::string& input)
{
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
int nestingLevel = 0;
while ((pos = input.find("$<", lastPos)) != std::string::npos) {
result += input.substr(lastPos, pos - lastPos);
pos += 2;
nestingLevel = 1;
const char* c = input.c_str() + pos;
const char* const cStart = c;
for (; *c; ++c) {
if (c[0] == '$' && c[1] == '<') {
++nestingLevel;
++c;
continue;
}
if (c[0] == '>') {
--nestingLevel;
if (nestingLevel == 0) {
break;
}
}
}
const std::string::size_type traversed = (c - cStart) + 1;
if (!*c) {
result += "$<" + input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
if (nestingLevel == 0) {
result += input.substr(lastPos);
}
return cmGeneratorExpression::StripEmptyListElements(result);
}
static void prefixItems(const std::string& content, std::string& result,
const std::string& prefix)
{
std::vector<std::string> entries;
cmGeneratorExpression::Split(content, entries);
const char* sep = "";
for (std::vector<std::string>::const_iterator ei = entries.begin();
ei != entries.end(); ++ei) {
result += sep;
sep = ";";
if (!cmSystemTools::FileIsFullPath(ei->c_str()) &&
cmGeneratorExpression::Find(*ei) != 0) {
result += prefix;
}
result += *ei;
}
}
static std::string stripExportInterface(
const std::string& input, cmGeneratorExpression::PreprocessContext context,
bool resolveRelative)
{
std::string result;
int nestingLevel = 0;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while (true) {
std::string::size_type bPos = input.find("$<BUILD_INTERFACE:", lastPos);
std::string::size_type iPos = input.find("$<INSTALL_INTERFACE:", lastPos);
if (bPos == std::string::npos && iPos == std::string::npos) {
break;
}
if (bPos == std::string::npos) {
pos = iPos;
} else if (iPos == std::string::npos) {
pos = bPos;
} else {
pos = (bPos < iPos) ? bPos : iPos;
}
result += input.substr(lastPos, pos - lastPos);
const bool gotInstallInterface = input[pos + 2] == 'I';
pos += gotInstallInterface ? sizeof("$<INSTALL_INTERFACE:") - 1
: sizeof("$<BUILD_INTERFACE:") - 1;
nestingLevel = 1;
const char* c = input.c_str() + pos;
const char* const cStart = c;
for (; *c; ++c) {
if (c[0] == '$' && c[1] == '<') {
++nestingLevel;
++c;
continue;
}
if (c[0] == '>') {
--nestingLevel;
if (nestingLevel != 0) {
continue;
}
if (context == cmGeneratorExpression::BuildInterface &&
!gotInstallInterface) {
result += input.substr(pos, c - cStart);
} else if (context == cmGeneratorExpression::InstallInterface &&
gotInstallInterface) {
const std::string content = input.substr(pos, c - cStart);
if (resolveRelative) {
prefixItems(content, result, "${_IMPORT_PREFIX}/");
} else {
result += content;
}
}
break;
}
}
const std::string::size_type traversed = (c - cStart) + 1;
if (!*c) {
result += std::string(gotInstallInterface ? "$<INSTALL_INTERFACE:"
: "$<BUILD_INTERFACE:") +
input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
if (nestingLevel == 0) {
result += input.substr(lastPos);
}
return cmGeneratorExpression::StripEmptyListElements(result);
}
void cmGeneratorExpression::Split(const std::string& input,
std::vector<std::string>& output)
{
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while ((pos = input.find("$<", lastPos)) != std::string::npos) {
std::string part = input.substr(lastPos, pos - lastPos);
std::string preGenex;
if (!part.empty()) {
std::string::size_type startPos = input.rfind(';', pos);
if (startPos == std::string::npos) {
preGenex = part;
part = "";
} else if (startPos != pos - 1 && startPos >= lastPos) {
part = input.substr(lastPos, startPos - lastPos);
preGenex = input.substr(startPos + 1, pos - startPos - 1);
}
if (!part.empty()) {
cmSystemTools::ExpandListArgument(part, output);
}
}
pos += 2;
int nestingLevel = 1;
const char* c = input.c_str() + pos;
const char* const cStart = c;
for (; *c; ++c) {
if (c[0] == '$' && c[1] == '<') {
++nestingLevel;
++c;
continue;
}
if (c[0] == '>') {
--nestingLevel;
if (nestingLevel == 0) {
break;
}
}
}
for (; *c; ++c) {
// Capture the part after the genex and before the next ';'
if (c[0] == ';') {
--c;
break;
}
}
const std::string::size_type traversed = (c - cStart) + 1;
output.push_back(preGenex + "$<" + input.substr(pos, traversed));
pos += traversed;
lastPos = pos;
}
if (lastPos < input.size()) {
cmSystemTools::ExpandListArgument(input.substr(lastPos), output);
}
}
std::string cmGeneratorExpression::Preprocess(const std::string& input,
PreprocessContext context,
bool resolveRelative)
{
if (context == StripAllGeneratorExpressions) {
return stripAllGeneratorExpressions(input);
}
if (context == BuildInterface || context == InstallInterface) {
return stripExportInterface(input, context, resolveRelative);
}
assert(false &&
"cmGeneratorExpression::Preprocess called with invalid args");
return std::string();
}
std::string::size_type cmGeneratorExpression::Find(const std::string& input)
{
const std::string::size_type openpos = input.find("$<");
if (openpos != std::string::npos &&
input.find('>', openpos) != std::string::npos) {
return openpos;
}
return std::string::npos;
}
bool cmGeneratorExpression::IsValidTargetName(const std::string& input)
{
// The ':' is supported to allow use with IMPORTED targets. At least
// Qt 4 and 5 IMPORTED targets use ':' as the namespace delimiter.
static cmsys::RegularExpression targetNameValidator("^[A-Za-z0-9_.:+-]+$");
return targetNameValidator.find(input);
}
void cmCompiledGeneratorExpression::GetMaxLanguageStandard(
const cmGeneratorTarget* tgt, std::map<std::string, std::string>& mapping)
{
typedef std::map<cmGeneratorTarget const*,
std::map<std::string, std::string> >
MapType;
MapType::const_iterator it = this->MaxLanguageStandard.find(tgt);
if (it != this->MaxLanguageStandard.end()) {
mapping = it->second;
}
}