install: Fix evaluation of leading generator expressions in DIRECTORY

Since commit v3.5.0-rc1~58^2 (install: Allow generator expressions in
DIRECTORY, 2016-01-12) we accidentally treat leading generator
expressions as relative paths even though they may evaluate to absolute
paths.  Defer the conversion to an absolute path until after evaluation.

1 files changed, 11 insertions, 0 deletions

diff --git a/Source/cmInstallDirectoryGenerator.cxx b/Source/cmInstallDirectoryGenerator.cxx
index 3928231..469b119 100644
--- a/Source/cmInstallDirectoryGenerator.cxx
+++ b/Source/cmInstallDirectoryGenerator.cxx
@@ -13,6 +13,7 @@
 
 #include "cmGeneratorExpression.h"
 #include "cmLocalGenerator.h"
+#include "cmMakefile.h"
 
 cmInstallDirectoryGenerator::cmInstallDirectoryGenerator(
   std::vector<std::string> const& dirs, const char* dest,
@@ -73,6 +74,16 @@ void cmInstallDirectoryGenerator::GenerateScriptForConfig(
     cmSystemTools::ExpandListArgument(
       cge->Evaluate(this->LocalGenerator, config), dirs);
   }
+
+  // Make sure all dirs have absolute paths.
+  cmMakefile const& mf = *this->LocalGenerator->GetMakefile();
+  for (std::vector<std::string>::iterator i = dirs.begin(); i != dirs.end();
+       ++i) {
+    if (!cmSystemTools::FileIsFullPath(i->c_str())) {
+      *i = std::string(mf.GetCurrentSourceDirectory()) + "/" + *i;
+    }
+  }
+
   this->AddDirectoryInstallRule(os, config, indent, dirs);
 }