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find_package: add MODULE mode to use only Find-modules 

The new mode differ from default mode in that that it doesn't fallback
to config mode.  The default mode stays unchanged.
This commit is contained in:
Alex Neundorf 2012-02-20 22:09:10 +01:00 committed by Brad King
parent 7d67dcf52b
commit f310f67291
2 changed files with 118 additions and 57 deletions
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66
Source/cmFindPackageCommand.cxx
View File

@ -57,6 +57,7 @@ cmFindPackageCommand::cmFindPackageCommand()
this->NoUserRegistry = false;
this->NoSystemRegistry = false;
this->NoBuilds = false;
this->UseConfigFiles = true;
this->UseFindModules = true;
this->DebugMode = false;
this->UseLib64Paths = false;
@ -86,7 +87,7 @@ void cmFindPackageCommand::GenerateDocumentation()
cmSystemTools::ReplaceString(this->GenericDocumentationPathsOrder,
"FIND_XXX", "find_package");
this->CommandDocumentation =
" find_package(<package> [version] [EXACT] [QUIET]\n"
" find_package(<package> [version] [EXACT] [QUIET] [MODULE]\n"
" [[REQUIRED|COMPONENTS] [components...]]\n"
" [NO_POLICY_SCOPE])\n"
"Finds and loads settings from an external project. "
@ -94,6 +95,7 @@ void cmFindPackageCommand::GenerateDocumentation()
"When the package is found package-specific information is provided "
"through variables documented by the package itself. "
"The QUIET option disables messages if the package cannot be found. "
"The MODULE option disables the second signature documented below. "
"The REQUIRED option stops processing with an error message if the "
"package cannot be found. "
"A package-specific list of components may be listed after the "
@ -124,7 +126,8 @@ void cmFindPackageCommand::GenerateDocumentation()
"and producing any needed messages. "
"Many find-modules provide limited or no support for versioning; "
"check the module documentation. "
"If no module is found the command proceeds to Config mode.\n"
"If no module is found and the MODULE option is not given the command "
"proceeds to Config mode.\n"
"The complete Config mode command signature is:\n"
" find_package(<package> [version] [EXACT] [QUIET]\n"
" [[REQUIRED|COMPONENTS] [components...]] [NO_MODULE]\n"
@ -410,6 +413,7 @@ bool cmFindPackageCommand
Doing doing = DoingNone;
cmsys::RegularExpression version("^[0-9.]+$");
bool haveVersion = false;
std::string haveModeString = "";
for(unsigned int i=1; i < args.size(); ++i)
{
if(args[i] == "QUIET")
@ -423,10 +427,35 @@ bool cmFindPackageCommand
this->Compatibility_1_6 = false;
doing = DoingNone;
}
else if(args[i] == "MODULE")
{
if(!haveModeString.empty())
{
cmOStringStream e;
e << "given " << args[i] << ", but mode is already set to "
<< haveModeString << ".";
this->SetError(e.str().c_str());
return false;
}
this->UseConfigFiles = false;
doing = DoingNone;
haveModeString = args[i];
}
else if(args[i] == "NO_MODULE")
{
if(!haveModeString.empty())
{
cmOStringStream e;
e << "given " << args[i] << ", but mode is already set to "
<< haveModeString << ".";
this->SetError(e.str().c_str());
return false;
}
this->UseFindModules = false;
doing = DoingNone;
haveModeString = args[i];
}
else if(args[i] == "REQUIRED")
{
@ -831,6 +860,8 @@ bool cmFindPackageCommand::HandlePackageMode()
// Try to load the config file if the directory is known
bool fileFound = false;
if (this->UseConfigFiles)
{
if(!cmSystemTools::IsOff(def))
{
// Get the directory from the variable value.
@ -867,6 +898,7 @@ bool cmFindPackageCommand::HandlePackageMode()
cmake::INTERNAL_ERROR, "fileFound is true but FileFound is empty!");
fileFound = false;
}
}
// If the directory for the config file was found, try to read the file.
bool result = true;
@ -893,6 +925,7 @@ bool cmFindPackageCommand::HandlePackageMode()
{
// The variable is not set.
cmOStringStream e;
cmOStringStream aw;
// If there are files in ConsideredConfigs, it means that FooConfig.cmake
// have been found, but they didn't have appropriate versions.
if (this->ConsideredConfigs.size() > 0)
@ -911,6 +944,8 @@ bool cmFindPackageCommand::HandlePackageMode()
}
}
else
{
if (this->UseConfigFiles)
{
if(this->UseFindModules)
{
@ -923,7 +958,8 @@ bool cmFindPackageCommand::HandlePackageMode()
if(this->Configs.size() == 1)
{
e << "Could not find a package configuration file named \""
<< this->Configs[0] << "\" provided by package \"" << this->Name << "\".\n";
<< this->Configs[0] << "\" provided by package \""
<< this->Name << "\".\n";
}
else
{
@ -943,9 +979,33 @@ bool cmFindPackageCommand::HandlePackageMode()
"If \"" << this->Name << "\" provides a separate development "
"package or SDK, be sure it has been installed.";
}
else // if(!this->UseFindModules && !this->UseConfigFiles)
{
e << "No \"Find" << this->Name << ".cmake\" found in "
<< "CMAKE_MODULE_PATH.";
aw<< "Find"<< this->Name <<".cmake must either be part of this "
"project itself, in this case adjust CMAKE_MODULE_PATH so that "
"it points to the correct location inside its source tree.\n"
"Or it must be installed by a package which has already been "
"found via find_package(). In this case make sure that "
"package has indeed been found and adjust CMAKE_MODULE_PATH to "
"contain the location where that package has installed "
"Find" << this->Name << ".cmake. This must be a location "
"provided by that package. This error in general means that "
"the buildsystem of this project is relying on a Find-module "
"without ensuring that it is actually available.\n";
}
}
this->Makefile->IssueMessage(
this->Required? cmake::FATAL_ERROR : cmake::WARNING, e.str());
if (!aw.str().empty())
{
this->Makefile->IssueMessage(cmake::AUTHOR_WARNING,aw.str());
}
}
// Set a variable marking whether the package was found.

1
Source/cmFindPackageCommand.h
View File

@ -133,6 +133,7 @@ private:
bool Quiet;
bool Required;
bool Compatibility_1_6;
bool UseConfigFiles;
bool UseFindModules;
bool NoUserRegistry;
bool NoSystemRegistry;