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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#include "cmGeneratorExpression.h"
#include <algorithm>
#include <cassert>
#include <memory>
#include <stack>
#include <utility>
#include <cm/string_view>
#include "cmsys/RegularExpression.hxx"
#include "cmGenExContext.h"
#include "cmGenExEvaluation.h"
#include "cmGeneratorExpressionDAGChecker.h"
#include "cmGeneratorExpressionEvaluator.h"
#include "cmGeneratorExpressionLexer.h"
#include "cmGeneratorExpressionParser.h"
#include "cmList.h"
#include "cmLocalGenerator.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
#include "cmake.h"
cmGeneratorExpression::cmGeneratorExpression(cmake& cmakeInstance,
cmListFileBacktrace backtrace)
: CMakeInstance(cmakeInstance)
, Backtrace(std::move(backtrace))
{
}
cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression() = default;
cmGeneratorExpression::~cmGeneratorExpression() = default;
std::unique_ptr<cmCompiledGeneratorExpression> cmGeneratorExpression::Parse(
std::string input) const
{
return std::unique_ptr<cmCompiledGeneratorExpression>(
new cmCompiledGeneratorExpression(this->CMakeInstance, this->Backtrace,
std::move(input)));
}
std::string cmGeneratorExpression::Evaluate(
std::string input, cmLocalGenerator const* lg, std::string const& config,
cmGeneratorTarget const* headTarget,
cmGeneratorExpressionDAGChecker* dagChecker,
cmGeneratorTarget const* currentTarget, std::string const& language)
{
if (Find(input) != std::string::npos) {
#ifndef CMAKE_BOOTSTRAP
auto profilingRAII = lg->GetCMakeInstance()->CreateProfilingEntry(
"genex_compile_eval", input);
#endif
cm::GenEx::Context context(lg, config, language);
cmCompiledGeneratorExpression cge(*lg->GetCMakeInstance(),
cmListFileBacktrace(), std::move(input));
return cge.Evaluate(context, dagChecker, headTarget, currentTarget);
}
return input;
}
std::string const& cmCompiledGeneratorExpression::Evaluate(
cmLocalGenerator const* lg, std::string const& config,
cmGeneratorTarget const* headTarget) const
{
cm::GenEx::Context context(lg, config);
return this->Evaluate(context, nullptr, headTarget);
}
std::string const& cmCompiledGeneratorExpression::Evaluate(
cm::GenEx::Context const& context,
cmGeneratorExpressionDAGChecker* dagChecker,
cmGeneratorTarget const* headTarget,
cmGeneratorTarget const* currentTarget) const
{
cm::GenEx::Evaluation eval(context, this->Quiet, headTarget,
currentTarget ? currentTarget : headTarget,
this->EvaluateForBuildsystem, this->Backtrace);
if (!this->NeedsEvaluation) {
return this->Input;
}
this->Output.clear();
for (auto const& it : this->Evaluators) {
this->Output += it->Evaluate(&eval, dagChecker);
this->SeenTargetProperties.insert(eval.SeenTargetProperties.cbegin(),
eval.SeenTargetProperties.cend());
if (eval.HadError) {
this->Output.clear();
break;
}
}
this->MaxLanguageStandard = eval.MaxLanguageStandard;
if (!eval.HadError) {
this->HadContextSensitiveCondition = eval.HadContextSensitiveCondition;
this->HadHeadSensitiveCondition = eval.HadHeadSensitiveCondition;
this->HadLinkLanguageSensitiveCondition =
eval.HadLinkLanguageSensitiveCondition;
this->SourceSensitiveTargets = eval.SourceSensitiveTargets;
}
this->DependTargets = eval.DependTargets;
this->AllTargetsSeen = eval.AllTargets;
return this->Output;
}
cmCompiledGeneratorExpression::cmCompiledGeneratorExpression(
cmake& cmakeInstance, cmListFileBacktrace backtrace, std::string input)
: Backtrace(std::move(backtrace))
, Input(std::move(input))
{
#ifndef CMAKE_BOOTSTRAP
auto profilingRAII =
cmakeInstance.CreateProfilingEntry("genex_compile", this->Input);
#endif
cmGeneratorExpressionLexer l;
std::vector<cmGeneratorExpressionToken> tokens = l.Tokenize(this->Input);
this->NeedsEvaluation = l.GetSawGeneratorExpression();
if (this->NeedsEvaluation) {
cmGeneratorExpressionParser p(tokens);
p.Parse(this->Evaluators);
}
}
std::string cmGeneratorExpression::StripEmptyListElements(
std::string const& input)
{
if (input.find(';') == std::string::npos) {
return input;
}
std::string result;
result.reserve(input.size());
char const* c = input.c_str();
char const* 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 extractAllGeneratorExpressions(
std::string const& input,
std::map<std::string, std::vector<std::string>>* collected)
{
std::string result;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
std::stack<char const*> starts; // indices of "$<"
std::stack<char const*> colons; // indices of ":"
while ((pos = input.find("$<", lastPos)) != std::string::npos) {
result += input.substr(lastPos, pos - lastPos);
starts.push(input.c_str() + pos);
pos += 2;
char const* c = input.c_str() + pos;
char const* const cStart = c;
for (; *c; ++c) {
if (cmGeneratorExpression::StartsWithGeneratorExpression(c)) {
starts.push(c);
++c;
continue;
}
if (c[0] == ':') {
if (colons.size() < starts.size()) {
colons.push(c);
}
} else if (c[0] == '>') {
if (collected && !starts.empty() && !colons.empty()) {
(*collected)[std::string(starts.top() + 2, colons.top())].push_back(
std::string(colons.top() + 1, c));
}
if (!starts.empty()) {
starts.pop();
}
if (!colons.empty()) {
colons.pop();
}
if (starts.empty()) {
break;
}
}
}
std::string::size_type const traversed = (c - cStart) + 1;
if (!*c) {
result += "$<" + input.substr(pos, traversed);
}
pos += traversed;
lastPos = pos;
}
if (starts.empty()) {
result += input.substr(lastPos);
}
return cmGeneratorExpression::StripEmptyListElements(result);
}
static std::string stripAllGeneratorExpressions(std::string const& input)
{
return extractAllGeneratorExpressions(input, nullptr);
}
static void prefixItems(std::string const& content, std::string& result,
cm::string_view const& prefix)
{
std::vector<std::string> entries;
cmGeneratorExpression::Split(content, entries);
char const* sep = "";
for (std::string const& e : entries) {
result += sep;
sep = ";";
if (!cmSystemTools::FileIsFullPath(e) &&
cmGeneratorExpression::Find(e) != 0) {
result += prefix;
}
result += e;
}
}
static std::string stripExportInterface(
std::string const& input, cmGeneratorExpression::PreprocessContext context,
cm::string_view importPrefix)
{
std::string result;
int nestingLevel = 0;
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while (true) {
std::string::size_type bPos = input.find("$<BUILD_INTERFACE:", lastPos);
std::string::size_type iPos = input.find("$<INSTALL_INTERFACE:", lastPos);
std::string::size_type lPos =
input.find("$<BUILD_LOCAL_INTERFACE:", lastPos);
pos = std::min({ bPos, iPos, lPos });
if (pos == std::string::npos) {
break;
}
result += input.substr(lastPos, pos - lastPos);
enum class FoundGenex
{
BuildInterface,
InstallInterface,
BuildLocalInterface,
} foundGenex = FoundGenex::BuildInterface;
if (pos == bPos) {
foundGenex = FoundGenex::BuildInterface;
pos += cmStrLen("$<BUILD_INTERFACE:");
} else if (pos == iPos) {
foundGenex = FoundGenex::InstallInterface;
pos += cmStrLen("$<INSTALL_INTERFACE:");
} else if (pos == lPos) {
foundGenex = FoundGenex::BuildLocalInterface;
pos += cmStrLen("$<BUILD_LOCAL_INTERFACE:");
} else {
assert(false && "Invalid position found");
}
nestingLevel = 1;
char const* c = input.c_str() + pos;
char const* const cStart = c;
for (; *c; ++c) {
if (cmGeneratorExpression::StartsWithGeneratorExpression(c)) {
++nestingLevel;
++c;
continue;
}
if (c[0] == '>') {
--nestingLevel;
if (nestingLevel != 0) {
continue;
}
if (context == cmGeneratorExpression::BuildInterface &&
foundGenex == FoundGenex::BuildInterface) {
result += input.substr(pos, c - cStart);
} else if (context == cmGeneratorExpression::InstallInterface &&
foundGenex == FoundGenex::InstallInterface) {
std::string const content = input.substr(pos, c - cStart);
if (!importPrefix.empty()) {
prefixItems(content, result, importPrefix);
} else {
result += content;
}
}
break;
}
}
std::string::size_type const traversed = (c - cStart) + 1;
if (!*c) {
auto remaining = input.substr(pos, traversed);
switch (foundGenex) {
case FoundGenex::BuildInterface:
result = cmStrCat(result, "$<BUILD_INTERFACE:", remaining);
break;
case FoundGenex::InstallInterface:
result = cmStrCat(result, "$<INSTALL_INTERFACE:", remaining);
break;
case FoundGenex::BuildLocalInterface:
result = cmStrCat(result, "$<BUILD_LOCAL_INTERFACE:", remaining);
break;
}
}
pos += traversed;
lastPos = pos;
}
if (nestingLevel == 0) {
result += input.substr(lastPos);
}
return cmGeneratorExpression::StripEmptyListElements(result);
}
void cmGeneratorExpression::Split(std::string const& input,
std::vector<std::string>& output)
{
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while ((pos = input.find("$<", lastPos)) != std::string::npos) {
std::string part = input.substr(lastPos, pos - lastPos);
std::string preGenex;
if (!part.empty()) {
std::string::size_type startPos = input.rfind(';', pos);
if (startPos == std::string::npos) {
preGenex = part;
part.clear();
} else if (startPos != pos - 1 && startPos >= lastPos) {
part = input.substr(lastPos, startPos - lastPos);
preGenex = input.substr(startPos + 1, pos - startPos - 1);
}
if (!part.empty()) {
cmExpandList(part, output);
}
}
pos += 2;
int nestingLevel = 1;
char const* c = input.c_str() + pos;
char const* const cStart = c;
for (; *c; ++c) {
if (cmGeneratorExpression::StartsWithGeneratorExpression(c)) {
++nestingLevel;
++c;
continue;
}
if (c[0] == '>') {
--nestingLevel;
if (nestingLevel == 0) {
break;
}
}
}
for (; *c; ++c) {
// Capture the part after the genex and before the next ';'
if (c[0] == ';') {
--c;
break;
}
}
std::string::size_type const traversed = (c - cStart) + 1;
output.push_back(preGenex + "$<" + input.substr(pos, traversed));
pos += traversed;
lastPos = pos;
}
if (lastPos < input.size()) {
cmExpandList(input.substr(lastPos), output);
}
}
std::string cmGeneratorExpression::Preprocess(std::string const& input,
PreprocessContext context,
cm::string_view importPrefix)
{
if (context == StripAllGeneratorExpressions) {
return stripAllGeneratorExpressions(input);
}
if (context == BuildInterface || context == InstallInterface) {
return stripExportInterface(input, context, importPrefix);
}
assert(false &&
"cmGeneratorExpression::Preprocess called with invalid args");
return std::string();
}
std::string cmGeneratorExpression::Collect(
std::string const& input,
std::map<std::string, std::vector<std::string>>& collected)
{
return extractAllGeneratorExpressions(input, &collected);
}
cm::string_view::size_type cmGeneratorExpression::Find(
cm::string_view const& input)
{
cm::string_view::size_type const openpos = input.find("$<");
if (openpos != cm::string_view::npos &&
input.find('>', openpos) != cm::string_view::npos) {
return openpos;
}
return cm::string_view::npos;
}
bool cmGeneratorExpression::IsValidTargetName(std::string const& input)
{
// The ':' is supported to allow use with IMPORTED targets. At least
// Qt 4 and 5 IMPORTED targets use ':' as the namespace delimiter.
static cmsys::RegularExpression targetNameValidator("^[A-Za-z0-9_.:+-]+$");
return targetNameValidator.find(input);
}
void cmGeneratorExpression::ReplaceInstallPrefix(
std::string& input, std::string const& replacement)
{
std::string::size_type pos = 0;
std::string::size_type lastPos = pos;
while ((pos = input.find("$<INSTALL_PREFIX>", lastPos)) !=
std::string::npos) {
std::string::size_type endPos = pos + cmStrLen("$<INSTALL_PREFIX>");
input.replace(pos, endPos - pos, replacement);
lastPos = endPos;
}
}
void cmCompiledGeneratorExpression::GetMaxLanguageStandard(
cmGeneratorTarget const* tgt, std::map<std::string, std::string>& mapping)
{
auto it = this->MaxLanguageStandard.find(tgt);
if (it != this->MaxLanguageStandard.end()) {
mapping = it->second;
}
}
std::string const& cmGeneratorExpressionInterpreter::Evaluate(
std::string expression, std::string const& property)
{
this->CompiledGeneratorExpression =
this->GeneratorExpression.Parse(std::move(expression));
cm::GenEx::Context context(this->LocalGenerator, this->Config,
this->Language);
// Specify COMPILE_OPTIONS to DAGchecker, same semantic as COMPILE_FLAGS
cmGeneratorExpressionDAGChecker dagChecker{
this->HeadTarget,
property == "COMPILE_FLAGS" ? "COMPILE_OPTIONS" : property,
nullptr,
nullptr,
context,
};
return this->CompiledGeneratorExpression->Evaluate(context, &dagChecker,
this->HeadTarget);
}
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