CMake/Source/cmPolicies.cxx

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#include "cmPolicies.h"
#include "cmake.h"
#include "cmMakefile.h"
#include "cmSourceFile.h"
#include <map>
#include <set>
#include <queue>
#include <assert.h>
const char* cmPolicies::PolicyStatusNames[] = {
"OLD", "WARN", "NEW", "REQUIRED_IF_USED", "REQUIRED_ALWAYS"
};
class cmPolicy
{
public:
cmPolicy(cmPolicies::PolicyID iD,
const char *idString,
const char *shortDescription,
const char *longDescription,
unsigned int majorVersionIntroduced,
unsigned int minorVersionIntroduced,
unsigned int patchVersionIntroduced,
cmPolicies::PolicyStatus status)
{
if (!idString || !shortDescription || ! longDescription)
{
cmSystemTools::Error("Attempt to define a policy without "
"all parameters being specified!");
return;
}
this->ID = iD;
this->IDString = idString;
this->ShortDescription = shortDescription;
this->LongDescription = longDescription;
this->MajorVersionIntroduced = majorVersionIntroduced;
this->MinorVersionIntroduced = minorVersionIntroduced;
this->PatchVersionIntroduced = patchVersionIntroduced;
this->Status = status;
}
std::string GetVersionString()
{
cmOStringStream error;
error << this->MajorVersionIntroduced << "." <<
this->MinorVersionIntroduced << "." <<
this->PatchVersionIntroduced;
return error.str();
}
bool IsPolicyNewerThan(unsigned int majorV,
unsigned int minorV,
unsigned int patchV)
{
if (majorV < this->MajorVersionIntroduced)
{
return true;
}
if (majorV > this->MajorVersionIntroduced)
{
return false;
}
if (minorV < this->MinorVersionIntroduced)
{
return true;
}
if (minorV > this->MinorVersionIntroduced)
{
return false;
}
return (patchV < this->PatchVersionIntroduced);
}
cmPolicies::PolicyID ID;
std::string IDString;
std::string ShortDescription;
std::string LongDescription;
unsigned int MajorVersionIntroduced;
unsigned int MinorVersionIntroduced;
unsigned int PatchVersionIntroduced;
cmPolicies::PolicyStatus Status;
};
cmPolicies::cmPolicies()
{
// define all the policies
this->DefinePolicy(CMP_0000, "CMP_0000",
"Missing a CMake version specification. You must have a cmake_policy "
"or cmake_minimum_required call.",
"CMake requires that projects specify what version of CMake they have "
"been written to. The easiest way to do this is by placing a call to "
"cmake_policy such as the following cmake_policy(VERSION 2.6) Replace "
"2.6 in that example with the verison of CMake you are writing to. "
"This policy is being put in place because it aids us in detecting "
"and maintaining backwards compatibility.",
2,6,0, cmPolicies::WARN);
this->PolicyStringMap["CMP_POLICY_SPECIFICATION"] = CMP_0000;
this->DefinePolicy(CMP_0001, "CMP_0001",
"CMake does not allow target names to include slash characters.",
"CMake requires that target names not include any / or \\ characters "
"please change the name of any targets to not use such characters."
,
2,4,0, cmPolicies::REQUIRED_IF_USED);
this->PolicyStringMap["CMP_TARGET_NAMES_WITH_SLASHES"] = CMP_0001;
this->DefinePolicy(CMP_0002, "CMP_0002",
"CMake requires that target names be globaly unique.",
"CMake requires that target names not include any / or \\ characters "
"please change the name of any targets to not use such characters."
,
2,6,0, cmPolicies::WARN);
this->PolicyStringMap["CMP_REQUIRE_UNIQUE_TARGET_NAMES"] = CMP_0002;
}
cmPolicies::~cmPolicies()
{
// free the policies
std::map<cmPolicies::PolicyID,cmPolicy *>::iterator i
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= this->Policies.begin();
for (;i != this->Policies.end(); ++i)
{
delete i->second;
}
}
void cmPolicies::DefinePolicy(cmPolicies::PolicyID iD,
const char *idString,
const char *shortDescription,
const char *longDescription,
unsigned int majorVersionIntroduced,
unsigned int minorVersionIntroduced,
unsigned int patchVersionIntroduced,
cmPolicies::PolicyStatus status)
{
// a policy must be unique and can only be defined once
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if (this->Policies.find(iD) != this->Policies.end())
{
cmSystemTools::Error("Attempt to redefine a CMake policy for policy "
"ID ", this->GetPolicyIDString(iD).c_str());
return;
}
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this->Policies[iD] = new cmPolicy(iD, idString,
shortDescription,
longDescription,
majorVersionIntroduced,
minorVersionIntroduced,
patchVersionIntroduced,
status);
this->PolicyStringMap[idString] = iD;
}
bool cmPolicies::ApplyPolicyVersion(cmMakefile *mf,
const char *version)
{
std::string ver = "2.4.0";
if (version && strlen(version) > 0)
{
ver = version;
}
unsigned int majorVer = 2;
unsigned int minorVer = 0;
unsigned int patchVer = 0;
// parse the string
std::string major = ver.substr(0,ver.find('.'));
std::string patch = ver.substr(ver.find('.'));
std::string minor = patch.substr(0,patch.find('.'));
patch = patch.substr(patch.find('.'));
if (major.size())
{
majorVer = atoi(major.c_str());
}
if (minor.size())
{
minorVer = atoi(minor.c_str());
}
if (patch.size())
{
patchVer = atoi(patch.c_str());
}
// now loop over all the policies and set them as appropriate
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std::map<cmPolicies::PolicyID,cmPolicy *>::iterator i
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= this->Policies.begin();
for (;i != this->Policies.end(); ++i)
{
if (i->second->IsPolicyNewerThan(majorVer,minorVer,patchVer))
{
if (!mf->SetPolicy(i->second->ID, cmPolicies::WARN))
{
return false;
}
}
else
{
if (!mf->SetPolicy(i->second->ID, cmPolicies::NEW))
{
return false;
}
}
}
return true;
}
// is this a valid status the listfile can set this policy to?
bool cmPolicies::IsValidPolicyStatus(cmPolicies::PolicyID id,
cmPolicies::PolicyStatus status)
{
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// if they are setting a feature to anything other than OLD or WARN and the
// feature is not known about then that is an error
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if (this->Policies.find(id) == this->Policies.end())
{
if (status == cmPolicies::WARN ||
status == cmPolicies::OLD)
{
return true;
}
cmOStringStream error;
error <<
"Error: an attempt was made to enable the new behavior for " <<
"a new feature that is in a later version of CMake than "
"what you are runing, please upgrade to a newer version "
"of CMake.";
cmSystemTools::Error(error.str().c_str());
return false;
}
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// now we know the feature is defined, so the only issue is if someone is
// setting it to WARN or OLD when the feature is REQUIRED_ALWAYS
if ((status == cmPolicies::WARN ||
status == cmPolicies::OLD) &&
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this->Policies[id]->Status == cmPolicies::REQUIRED_ALWAYS)
{
cmOStringStream error;
error <<
"Error: an attempt was made to enable the old behavior for " <<
"a feature that is no longer supported. The feature in " <<
"question is feature " <<
id <<
" which had new behavior introduced in CMake version " <<
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this->Policies[id]->GetVersionString() <<
" please either update your CMakeLists files to conform to " <<
"the new behavior " <<
"or use an older version of CMake that still supports " <<
"the old behavior. Run cmake --help-policies " <<
id << " for more information.";
cmSystemTools::Error(error.str().c_str());
return false;
}
return true;
}
// is this a valid status the listfile can set this policy to?
bool cmPolicies::IsValidUsedPolicyStatus(cmPolicies::PolicyID id,
cmPolicies::PolicyStatus status)
{
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// if they are setting a feature to anything other than OLD or WARN and the
// feature is not known about then that is an error
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if (this->Policies.find(id) == this->Policies.end())
{
if (status == cmPolicies::WARN ||
status == cmPolicies::OLD)
{
return true;
}
cmOStringStream error;
error <<
"Error: an attempt was made to enable the new behavior for " <<
"a new feature that is in a later version of CMake than "
"what you are runing, please upgrade to a newer version "
"of CMake.";
cmSystemTools::Error(error.str().c_str());
return false;
}
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// now we know the feature is defined, so the only issue is if someone is
// setting it to WARN or OLD when the feature is REQUIRED_ALWAYS
if ((status == cmPolicies::WARN ||
status == cmPolicies::OLD) &&
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(this->Policies[id]->Status == cmPolicies::REQUIRED_ALWAYS ||
this->Policies[id]->Status == cmPolicies::REQUIRED_IF_USED))
{
cmOStringStream error;
error <<
"Error: an attempt was made to enable the old behavior for " <<
"a feature that is no longer supported. The feature in " <<
"question is feature " <<
id <<
" which had new behavior introduced in CMake version " <<
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this->Policies[id]->GetVersionString() <<
" please either update your CMakeLists files to conform to " <<
"the new behavior " <<
"or use an older version of CMake that still supports " <<
"the old behavior. Run cmake --help-policies " <<
id << " for more information.";
cmSystemTools::Error(error.str().c_str());
return false;
}
return true;
}
bool cmPolicies::GetPolicyID(const char *id, cmPolicies::PolicyID &pid)
{
if (!id || strlen(id) < 1)
{
return false;
}
std::map<std::string,cmPolicies::PolicyID>::iterator pos =
this->PolicyStringMap.find(id);
if (pos == this->PolicyStringMap.end())
{
return false;
}
pid = pos->second;
return true;
}
std::string cmPolicies::GetPolicyIDString(cmPolicies::PolicyID pid)
{
std::map<cmPolicies::PolicyID,cmPolicy *>::iterator pos =
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this->Policies.find(pid);
if (pos == this->Policies.end())
{
return "";
}
return pos->second->IDString;
}
///! return a warning string for a given policy
std::string cmPolicies::GetPolicyWarning(cmPolicies::PolicyID id)
{
std::map<cmPolicies::PolicyID,cmPolicy *>::iterator pos =
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this->Policies.find(id);
if (pos == this->Policies.end())
{
cmSystemTools::Error(
"Request for warning text for undefined policy!");
return "Request for warning text for undefined policy!";
}
cmOStringStream error;
error <<
"Warning " <<
pos->second->IDString << ": " <<
pos->second->ShortDescription <<
" You can suppress this warning by adding either\n" <<
"cmake_policy (OLD " <<
pos->second->IDString << ") for the old behavior or " <<
"cmake_policy(NEW " <<
pos->second->IDString << ") for the new behavior. " <<
"Run cmake --help-policy " <<
pos->second->IDString << " for more information.";
return error.str();
}
///! return an error string for when a required policy is unspecified
std::string cmPolicies::GetRequiredPolicyError(cmPolicies::PolicyID id)
{
std::map<cmPolicies::PolicyID,cmPolicy *>::iterator pos =
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this->Policies.find(id);
if (pos == this->Policies.end())
{
cmSystemTools::Error(
"Request for error text for undefined policy!");
return "Request for warning text for undefined policy!";
}
cmOStringStream error;
error <<
"Error " <<
pos->second->IDString << ": " <<
pos->second->ShortDescription <<
" This behavior is required now. You can suppress this message by "
"specifying that your listfile is written to handle this new "
"behavior by adding either\n" <<
"cmake_policy (NEW " <<
pos->second->IDString << ")\n or \n. " <<
"cmake_policy (VERSION " <<
pos->second->GetVersionString() << " ) or later."
"Run cmake --help-policy " <<
pos->second->IDString << " for more information.";
return error.str();
}
///! Get the default status for a policy
cmPolicies::PolicyStatus
cmPolicies::GetPolicyStatus(cmPolicies::PolicyID id)
{
// if the policy is not know then what?
std::map<cmPolicies::PolicyID,cmPolicy *>::iterator pos =
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this->Policies.find(id);
if (pos == this->Policies.end())
{
// TODO is this right?
return cmPolicies::WARN;
}
return pos->second->Status;
}