CMake/Source/cmCMakePolicyCommand.cxx

154 lines
4.4 KiB
C++
Raw Normal View History

Simplify CMake per-source license notices Per-source copyright/license notice headers that spell out copyright holder names and years are hard to maintain and often out-of-date or plain wrong. Precise contributor information is already maintained automatically by the version control tool. Ultimately it is the receiver of a file who is responsible for determining its licensing status, and per-source notices are merely a convenience. Therefore it is simpler and more accurate for each source to have a generic notice of the license name and references to more detailed information on copyright holders and full license terms. Our `Copyright.txt` file now contains a list of Contributors whose names appeared source-level copyright notices. It also references version control history for more precise information. Therefore we no longer need to spell out the list of Contributors in each source file notice. Replace CMake per-source copyright/license notice headers with a short description of the license and links to `Copyright.txt` and online information available from "https://cmake.org/licensing". The online URL also handles cases of modules being copied out of our source into other projects, so we can drop our notices about replacing links with full license text. Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority of the replacements mechanically. Manually fix up shebang lines and trailing newlines in a few files. Manually update the notices in a few files that the script does not handle.
2016-09-27 22:01:08 +03:00
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmCMakePolicyCommand.h"
#include "cmVersion.h"
// cmCMakePolicyCommand
bool cmCMakePolicyCommand::InitialPass(std::vector<std::string> const& args,
cmExecutionStatus&)
{
if (args.empty()) {
this->SetError("requires at least one argument.");
return false;
}
if (args[0] == "SET") {
return this->HandleSetMode(args);
2016-09-16 23:45:24 +03:00
}
if (args[0] == "GET") {
return this->HandleGetMode(args);
2016-09-16 23:45:24 +03:00
}
if (args[0] == "PUSH") {
if (args.size() > 1) {
this->SetError("PUSH may not be given additional arguments.");
return false;
}
this->Makefile->PushPolicy();
return true;
2016-09-16 23:45:24 +03:00
}
if (args[0] == "POP") {
if (args.size() > 1) {
this->SetError("POP may not be given additional arguments.");
return false;
}
this->Makefile->PopPolicy();
return true;
2016-09-16 23:45:24 +03:00
}
if (args[0] == "VERSION") {
return this->HandleVersionMode(args);
}
std::ostringstream e;
e << "given unknown first argument \"" << args[0] << "\"";
this->SetError(e.str());
return false;
}
bool cmCMakePolicyCommand::HandleSetMode(std::vector<std::string> const& args)
{
if (args.size() != 3) {
this->SetError("SET must be given exactly 2 additional arguments.");
return false;
}
cmPolicies::PolicyStatus status;
if (args[2] == "OLD") {
status = cmPolicies::OLD;
} else if (args[2] == "NEW") {
status = cmPolicies::NEW;
} else {
std::ostringstream e;
e << "SET given unrecognized policy status \"" << args[2] << "\"";
this->SetError(e.str());
return false;
}
if (!this->Makefile->SetPolicy(args[1].c_str(), status)) {
this->SetError("SET failed to set policy.");
return false;
}
if (args[1] == "CMP0001" &&
(status == cmPolicies::WARN || status == cmPolicies::OLD)) {
if (!(this->Makefile->GetState()->GetInitializedCacheValue(
"CMAKE_BACKWARDS_COMPATIBILITY"))) {
// Set it to 2.4 because that is the last version where the
// variable had meaning.
this->Makefile->AddCacheDefinition(
"CMAKE_BACKWARDS_COMPATIBILITY", "2.4",
"For backwards compatibility, what version of CMake "
"commands and "
"syntax should this version of CMake try to support.",
cmState::STRING);
}
}
return true;
}
bool cmCMakePolicyCommand::HandleGetMode(std::vector<std::string> const& args)
{
if (args.size() != 3) {
this->SetError("GET must be given exactly 2 additional arguments.");
return false;
}
// Get arguments.
std::string const& id = args[1];
std::string const& var = args[2];
// Lookup the policy number.
cmPolicies::PolicyID pid;
if (!cmPolicies::GetPolicyID(id.c_str(), pid)) {
std::ostringstream e;
e << "GET given policy \"" << id << "\" which is not known to this "
<< "version of CMake.";
this->SetError(e.str());
return false;
}
// Lookup the policy setting.
cmPolicies::PolicyStatus status = this->Makefile->GetPolicyStatus(pid);
switch (status) {
case cmPolicies::OLD:
// Report that the policy is set to OLD.
this->Makefile->AddDefinition(var, "OLD");
break;
case cmPolicies::WARN:
// Report that the policy is not set.
this->Makefile->AddDefinition(var, "");
break;
case cmPolicies::NEW:
// Report that the policy is set to NEW.
this->Makefile->AddDefinition(var, "NEW");
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
// The policy is required to be set before anything needs it.
{
std::ostringstream e;
e << cmPolicies::GetRequiredPolicyError(pid) << "\n"
<< "The call to cmake_policy(GET " << id << " ...) at which this "
<< "error appears requests the policy, and this version of CMake "
<< "requires that the policy be set to NEW before it is checked.";
this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
}
}
return true;
}
bool cmCMakePolicyCommand::HandleVersionMode(
std::vector<std::string> const& args)
{
if (args.size() <= 1) {
this->SetError("VERSION not given an argument");
return false;
2016-09-16 23:45:24 +03:00
}
if (args.size() >= 3) {
this->SetError("VERSION given too many arguments");
return false;
}
this->Makefile->SetPolicyVersion(args[1].c_str());
return true;
}