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ENH: now the set command can set environment variables

This commit is contained in:
Ken Martin 2005-01-20 14:38:16 -05:00
parent 36dd18efce
commit acdd032109
2 changed files with 40 additions and 2 deletions
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37
Source/cmSetCommand.cxx
View File

@ -24,6 +24,42 @@ bool cmSetCommand::InitialPass(std::vector<std::string> const& args)
this->SetError("called with incorrect number of arguments");
return false;
}
// watch for ENV signatures
const char* variable = args[0].c_str(); // VAR is always first
bool haveEnvVariable = false;
if (!strncmp(variable,"ENV{",4) && strlen(variable) > 5)
{
// what is the variable name
char *varName = new char [strlen(variable)];
strncpy(varName,variable+4,strlen(variable)-5);
varName[strlen(variable)-5] = '\0';
std::string putEnvArg = varName;
putEnvArg += "=";
// what is the current value if any
const char *currValue = getenv(varName);
// will it be set to something, then set it
if (args.size() > 1 && args[1].size())
{
// but only if it is different from current value
if (!currValue || strcmp(currValue,args[1].c_str()))
{
putEnvArg += args[1];
cmSystemTools::PutEnv(putEnvArg.c_str());
}
return true;
}
// if it will be cleared, then clear it if it isn;t already clear
if (currValue)
{
cmSystemTools::PutEnv(putEnvArg.c_str());
}
return true;
}
// SET (VAR) // Removes the definition of VAR.
if (args.size() == 1)
{
@ -35,7 +71,6 @@ bool cmSetCommand::InitialPass(std::vector<std::string> const& args)
// SET (VAR value )
// SET (VAR CACHE TYPE "doc String" [FORCE])
// SET (VAR value CACHE TYPE "doc string" [FORCE])
const char* variable = args[0].c_str(); // VAR is always first
std::string value; // optional
bool cache = false; // optional
bool force = false; // optional

5
Source/cmSetCommand.h
View File

@ -87,7 +87,10 @@ public:
"then this always writes into the current makefile. The FORCE option "
"will overwrite the CACHE value removing any changes by the USER.\n"
" SET(VAR VALUE1 ... VALUEN).\n"
"In this case VAR is set to a ; separated list of values.";
"In this case VAR is set to a ; separated list of values.\n"
"VAR can be an environment variable such as:\n"
" SET( ENV{PATH} /home/martink )\n"
"in which case the environment variable will be set.";
}
cmTypeMacro(cmSetCommand, cmCommand);