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authorStephen Kelly <steveire@gmail.com>2013-01-02 16:10:04 (GMT)
committerBrad King <brad.king@kitware.com>2013-05-24 13:02:45 (GMT)
commitb983a58bdf1a03a49f2512ac68390888669ac30b (patch)
treefdef14cc2d264b50e8bb48fbe53e2858852400de /Source/cmGeneratorExpressionEvaluationFile.cxx
parent272431a84ff13eb17cf04389428f57c7fe13e3a2 (diff)
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file: Add GENERATE command to produce files at generate time
The idea is to write to a temp file which contains generator expressions, and at generate time, evaluate the generator expressions, and write the result to a file. Because executables on Windows are limited in the length of command line it is possible to use, it is common to write command line arguments to a file instead and specify the file as a source of arguments. This new FILE(GENERATE) subcommand allows the use of generator expressions to create such files so that they can be used with add_custom_command for example.
Diffstat (limited to 'Source/cmGeneratorExpressionEvaluationFile.cxx')
-rw-r--r--Source/cmGeneratorExpressionEvaluationFile.cxx151
1 files changed, 151 insertions, 0 deletions
diff --git a/Source/cmGeneratorExpressionEvaluationFile.cxx b/Source/cmGeneratorExpressionEvaluationFile.cxx
new file mode 100644
index 0000000..cab99ed
--- /dev/null
+++ b/Source/cmGeneratorExpressionEvaluationFile.cxx
@@ -0,0 +1,151 @@
+/*============================================================================
+ CMake - Cross Platform Makefile Generator
+ Copyright 2013 Stephen Kelly <steveire@gmail.com>
+
+ Distributed under the OSI-approved BSD License (the "License");
+ see accompanying file Copyright.txt for details.
+
+ This software is distributed WITHOUT ANY WARRANTY; without even the
+ implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ See the License for more information.
+============================================================================*/
+
+#include "cmGeneratorExpressionEvaluationFile.h"
+
+#include "cmMakefile.h"
+
+#include <assert.h>
+
+//----------------------------------------------------------------------------
+cmGeneratorExpressionEvaluationFile::cmGeneratorExpressionEvaluationFile(
+ const std::string &input,
+ cmsys::auto_ptr<cmCompiledGeneratorExpression> outputFileExpr,
+ cmMakefile *makefile,
+ cmsys::auto_ptr<cmCompiledGeneratorExpression> condition,
+ bool inputIsContent)
+ : Input(input),
+ OutputFileExpr(outputFileExpr),
+ Makefile(makefile),
+ Condition(condition),
+ InputIsContent(inputIsContent)
+{
+}
+
+//----------------------------------------------------------------------------
+void cmGeneratorExpressionEvaluationFile::Generate(const char *config,
+ cmCompiledGeneratorExpression* inputExpression,
+ std::map<std::string, std::string> &outputFiles)
+{
+ std::string rawCondition = this->Condition->GetInput();
+ if (!rawCondition.empty())
+ {
+ std::string condResult = this->Condition->Evaluate(this->Makefile, config);
+ if (condResult == "0")
+ {
+ return;
+ }
+ if (condResult != "1")
+ {
+ cmOStringStream e;
+ e << "Evaluation file condition \"" << rawCondition << "\" did "
+ "not evaluate to valid content. Got \"" << condResult << "\".";
+ this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
+ return;
+ }
+ }
+
+ const std::string outputFileName
+ = this->OutputFileExpr->Evaluate(this->Makefile, config);
+ const std::string outputContent
+ = inputExpression->Evaluate(this->Makefile, config);
+
+ std::map<std::string, std::string>::iterator it
+ = outputFiles.find(outputFileName);
+
+ if(it != outputFiles.end())
+ {
+ if (it->second == outputContent)
+ {
+ return;
+ }
+ cmOStringStream e;
+ e << "Evaluation file to be written multiple times for different "
+ "configurations with different content:\n " << outputFileName;
+ this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
+ return;
+ }
+
+ this->Files.push_back(outputFileName);
+ outputFiles[outputFileName] = outputContent;
+
+ std::ofstream fout(outputFileName.c_str());
+
+ if(!fout)
+ {
+ cmOStringStream e;
+ e << "Evaluation file \"" << outputFileName << "\" cannot be written.";
+ this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
+ return;
+ }
+
+ fout << outputContent;
+
+ fout.close();
+}
+
+//----------------------------------------------------------------------------
+void cmGeneratorExpressionEvaluationFile::Generate()
+{
+ std::string inputContent;
+ if (this->InputIsContent)
+ {
+ inputContent = this->Input;
+ }
+ else
+ {
+ std::ifstream fin(this->Input.c_str());
+ if(!fin)
+ {
+ cmOStringStream e;
+ e << "Evaluation file \"" << this->Input << "\" cannot be read.";
+ this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str().c_str());
+ return;
+ }
+
+ std::string line;
+ std::string sep;
+ while(cmSystemTools::GetLineFromStream(fin, line))
+ {
+ inputContent += sep + line;
+ sep = "\n";
+ }
+ inputContent += sep;
+ }
+
+ cmListFileBacktrace lfbt = this->OutputFileExpr->GetBacktrace();
+ cmGeneratorExpression contentGE(lfbt);
+ cmsys::auto_ptr<cmCompiledGeneratorExpression> inputExpression
+ = contentGE.Parse(inputContent);
+
+ std::map<std::string, std::string> outputFiles;
+
+ std::vector<std::string> allConfigs;
+ this->Makefile->GetConfigurations(allConfigs);
+
+ if (allConfigs.empty())
+ {
+ this->Generate(0, inputExpression.get(), outputFiles);
+ }
+ else
+ {
+ for(std::vector<std::string>::const_iterator li = allConfigs.begin();
+ li != allConfigs.end(); ++li)
+ {
+ this->Generate(li->c_str(), inputExpression.get(), outputFiles);
+ if(cmSystemTools::GetFatalErrorOccured())
+ {
+ return;
+ }
+ }
+ }
+}