CTest: Read CTEST_PARALLEL_LEVEL from environment

If no explicit "-j <n>" option is given on the command line then read
the parallel level from an environment variable.

1 files changed, 11 insertions, 0 deletions

diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index 9a042c4..69ffb97 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -294,6 +294,7 @@ cmCTest::cmCTest()
 {
   this->LabelSummary           = true;
   this->ParallelLevel          = 1;
+  this->ParallelLevelSetInCli  = false;
   this->SubmitIndex            = 0;
   this->Failover               = false;
   this->BatchJobs              = false;
@@ -1999,11 +2000,13 @@ void cmCTest::HandleCommandLineArguments(size_t &i,
     i++;
     int plevel = atoi(args[i].c_str());
     this->SetParallelLevel(plevel);
+    this->ParallelLevelSetInCli = true;
     }
   else if(arg.find("-j") == 0)
     {
     int plevel = atoi(arg.substr(2).c_str());
     this->SetParallelLevel(plevel);
+    this->ParallelLevelSetInCli = true;
     }
 
   if(this->CheckArgument(arg, "--no-compress-output"))
@@ -2398,6 +2401,14 @@ int cmCTest::Run(std::vector<std::string> &args, std::string* output)
       }
     } // the close of the for argument loop
 
+  if (!this->ParallelLevelSetInCli)
+    {
+    if (const char *parallel = cmSystemTools::GetEnv("CTEST_PARALLEL_LEVEL"))
+      {
+      int plevel = atoi(parallel);
+      this->SetParallelLevel(plevel);
+      }
+    }
 
   // now what sould cmake do? if --build-and-test was specified then
   // we run the build and test handler and return