CMake/Source/cmAddCustomCommandCommand.cxx

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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
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Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notices for more information.
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=========================================================================*/
#include "cmAddCustomCommandCommand.h"
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#include "cmTarget.h"
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#include "cmSourceFile.h"
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// cmAddCustomCommandCommand
bool cmAddCustomCommandCommand
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
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{
/* Let's complain at the end of this function about the lack of a particular
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arg. For the moment, let's say that COMMAND, and either TARGET or SOURCE
are required.
*/
if (args.size() < 4)
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{
this->SetError("called with wrong number of arguments.");
return false;
}
std::string source, target, main_dependency, working;
std::string comment_buffer;
const char* comment = 0;
std::vector<std::string> depends, outputs, output;
bool verbatim = false;
bool append = false;
bool skip_rule_depends = false;
std::string implicit_depends_lang;
cmCustomCommand::ImplicitDependsList implicit_depends;
// Accumulate one command line at a time.
cmCustomCommandLine currentLine;
// Save all command lines.
cmCustomCommandLines commandLines;
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cmTarget::CustomCommandType cctype = cmTarget::POST_BUILD;
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enum tdoing {
doing_source,
doing_command,
doing_target,
doing_depends,
doing_implicit_depends_lang,
doing_implicit_depends_file,
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doing_main_dependency,
doing_output,
doing_outputs,
doing_comment,
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doing_working_directory,
doing_nothing
};
tdoing doing = doing_nothing;
for (unsigned int j = 0; j < args.size(); ++j)
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{
std::string const& copy = args[j];
if(copy == "SOURCE")
{
doing = doing_source;
}
else if(copy == "COMMAND")
{
doing = doing_command;
// Save the current command before starting the next command.
if(!currentLine.empty())
{
commandLines.push_back(currentLine);
currentLine.clear();
}
}
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else if(copy == "PRE_BUILD")
{
cctype = cmTarget::PRE_BUILD;
}
else if(copy == "PRE_LINK")
{
cctype = cmTarget::PRE_LINK;
}
else if(copy == "POST_BUILD")
{
cctype = cmTarget::POST_BUILD;
}
else if(copy == "VERBATIM")
{
verbatim = true;
}
else if(copy == "SKIP_RULE_DEPENDS")
{
doing = doing_nothing;
skip_rule_depends = true;
}
else if(copy == "APPEND")
{
append = true;
}
else if(copy == "TARGET")
{
doing = doing_target;
}
else if(copy == "ARGS")
{
// Ignore this old keyword.
}
else if (copy == "DEPENDS")
{
doing = doing_depends;
}
else if (copy == "OUTPUTS")
{
doing = doing_outputs;
}
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else if (copy == "OUTPUT")
{
doing = doing_output;
}
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else if (copy == "WORKING_DIRECTORY")
{
doing = doing_working_directory;
}
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else if (copy == "MAIN_DEPENDENCY")
{
doing = doing_main_dependency;
}
else if (copy == "IMPLICIT_DEPENDS")
{
doing = doing_implicit_depends_lang;
}
else if (copy == "COMMENT")
{
doing = doing_comment;
}
else
{
std::string filename;
switch (doing)
{
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case doing_output:
case doing_outputs:
if (!cmSystemTools::FileIsFullPath(copy.c_str()))
{
// This is an output to be generated, so it should be
// under the build tree. CMake 2.4 placed this under the
// source tree. However the only case that this change
// will break is when someone writes
//
// add_custom_command(OUTPUT out.txt ...)
//
// and later references "${CMAKE_CURRENT_SOURCE_DIR}/out.txt".
// This is fairly obscure so we can wait for someone to
// complain.
filename = this->Makefile->GetCurrentOutputDirectory();
filename += "/";
}
filename += copy;
break;
case doing_source:
// We do not want to convert the argument to SOURCE because
// that option is only available for backward compatibility.
// Old-style use of this command may use the SOURCE==TARGET
// trick which we must preserve. If we convert the source
// to a full path then it will no longer equal the target.
default:
break;
}
switch (doing)
{
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case doing_working_directory:
working = copy;
break;
case doing_source:
source = copy;
break;
case doing_output:
output.push_back(filename);
break;
case doing_main_dependency:
main_dependency = copy;
break;
case doing_implicit_depends_lang:
implicit_depends_lang = copy;
doing = doing_implicit_depends_file;
break;
case doing_implicit_depends_file:
{
// An implicit dependency starting point is also an
// explicit dependency.
depends.push_back(copy);
// Add the implicit dependency language and file.
cmCustomCommand::ImplicitDependsPair
entry(implicit_depends_lang, copy);
implicit_depends.push_back(entry);
// Switch back to looking for a language.
doing = doing_implicit_depends_lang;
}
break;
case doing_command:
currentLine.push_back(copy);
break;
case doing_target:
target = copy;
break;
case doing_depends:
depends.push_back(copy);
break;
case doing_outputs:
outputs.push_back(filename);
break;
case doing_comment:
comment_buffer = copy;
comment = comment_buffer.c_str();
break;
default:
this->SetError("Wrong syntax. Unknown type of argument.");
return false;
}
}
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}
// Store the last command line finished.
if(!currentLine.empty())
{
commandLines.push_back(currentLine);
currentLine.clear();
}
// At this point we could complain about the lack of arguments. For
// the moment, let's say that COMMAND, TARGET are always required.
if(output.empty() && target.empty())
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{
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this->SetError("Wrong syntax. A TARGET or OUTPUT must be specified.");
return false;
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}
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if(source.empty() && !target.empty() && !output.empty())
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{
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this->SetError(
"Wrong syntax. A TARGET and OUTPUT can not both be specified.");
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return false;
}
if(append && output.empty())
{
this->SetError("given APPEND option with no OUTPUT.");
return false;
}
// Make sure the output names and locations are safe.
if(!this->CheckOutputs(output) || !this->CheckOutputs(outputs))
{
return false;
}
// Check for an append request.
if(append)
{
// Lookup an existing command.
if(cmSourceFile* sf =
this->Makefile->GetSourceFileWithOutput(output[0].c_str()))
{
if(cmCustomCommand* cc = sf->GetCustomCommand())
{
cc->AppendCommands(commandLines);
cc->AppendDepends(depends);
cc->AppendImplicitDepends(implicit_depends);
return true;
}
}
// No command for this output exists.
cmOStringStream e;
e << "given APPEND option with output \"" << output[0].c_str()
<< "\" which is not already a custom command output.";
this->SetError(e.str().c_str());
return false;
}
// Choose which mode of the command to use.
bool escapeOldStyle = !verbatim;
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if(source.empty() && output.empty())
{
// Source is empty, use the target.
std::vector<std::string> no_depends;
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this->Makefile->AddCustomCommandToTarget(target.c_str(), no_depends,
commandLines, cctype,
comment, working.c_str(),
escapeOldStyle);
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}
else if(target.empty())
{
// Target is empty, use the output.
this->Makefile->AddCustomCommandToOutput(output, depends,
main_dependency.c_str(),
commandLines, comment,
working.c_str(), false,
escapeOldStyle);
// Get the rule object to add some extra information.
if(!implicit_depends.empty() || skip_rule_depends)
{
bool okay = false;
if(cmSourceFile* sf =
this->Makefile->GetSourceFileWithOutput(output[0].c_str()))
{
if(cmCustomCommand* cc = sf->GetCustomCommand())
{
okay = true;
// Add implicit dependency scanning requests if any were
// given.
if(!implicit_depends.empty())
{
cc->SetImplicitDepends(implicit_depends);
}
// Set the rule dependency state.
cc->SetSkipRuleDepends(skip_rule_depends);
}
}
if(!okay)
{
cmOStringStream e;
e << "could not locate source file with a custom command producing \""
<< output[0] << "\" even though this command tried to create it!";
this->SetError(e.str().c_str());
return false;
}
}
}
else
{
// Use the old-style mode for backward compatibility.
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this->Makefile->AddCustomCommandOldStyle(target.c_str(), outputs, depends,
source.c_str(), commandLines,
comment);
}
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return true;
}
//----------------------------------------------------------------------------
bool
cmAddCustomCommandCommand
::CheckOutputs(const std::vector<std::string>& outputs)
{
for(std::vector<std::string>::const_iterator o = outputs.begin();
o != outputs.end(); ++o)
{
// Make sure the file will not be generated into the source
// directory during an out of source build.
if(!this->Makefile->CanIWriteThisFile(o->c_str()))
{
std::string e = "attempted to have a file \"" + *o +
"\" in a source directory as an output of custom command.";
this->SetError(e.c_str());
cmSystemTools::SetFatalErrorOccured();
return false;
}
// Make sure the output file name has no invalid characters.
std::string::size_type pos = o->find_first_of("#<>");
if(pos != o->npos)
{
cmOStringStream msg;
msg << "called with OUTPUT containing a \"" << (*o)[pos]
<< "\". This character is not allowed.";
this->SetError(msg.str().c_str());
return false;
}
}
return true;
}