Merge branch 'upstream-KWSys' into update-kwsys

# By KWSys Upstream
* upstream-KWSys:
  KWSys 2020-05-18 (146f6b36)

5 files changed, 82 insertions, 10 deletions

diff --git a/Source/kwsys/Directory.cxx b/Source/kwsys/Directory.cxx
index d6409484ce..be9158eaaf 100644
--- a/Source/kwsys/Directory.cxx
+++ b/Source/kwsys/Directory.cxx
@@ -103,7 +103,7 @@ void Directory::Clear()
 
 namespace KWSYS_NAMESPACE {
 
-bool Directory::Load(const std::string& name)
+bool Directory::Load(const std::string& name, std::string* errorMessage)
 {
   this->Clear();
 #  if (defined(_MSC_VER) && _MSC_VER < 1300) || defined(__BORLANDC__)
@@ -146,7 +146,8 @@ bool Directory::Load(const std::string& name)
   return _findclose(srchHandle) != -1;
 }
 
-unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name)
+unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name,
+                                                     std::string* errorMessage)
 {
 #  if (defined(_MSC_VER) && _MSC_VER < 1300) || defined(__BORLANDC__)
   // Older Visual C++ and Embarcadero compilers.
@@ -192,6 +193,8 @@ unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name)
 #  include <sys/types.h>
 
 #  include <dirent.h>
+#  include <errno.h>
+#  include <string.h>
 
 // PGI with glibc has trouble with dirent and large file support:
 //  http://www.pgroup.com/userforum/viewtopic.php?
@@ -209,29 +212,46 @@ unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name)
 
 namespace KWSYS_NAMESPACE {
 
-bool Directory::Load(const std::string& name)
+bool Directory::Load(const std::string& name, std::string* errorMessage)
 {
   this->Clear();
 
+  errno = 0;
   DIR* dir = opendir(name.c_str());
 
   if (!dir) {
+    if (errorMessage != nullptr) {
+      *errorMessage = std::string(strerror(errno));
+    }
     return false;
   }
 
+  errno = 0;
   for (kwsys_dirent* d = readdir(dir); d; d = readdir(dir)) {
     this->Internal->Files.emplace_back(d->d_name);
   }
+  if (errno != 0) {
+    if (errorMessage != nullptr) {
+      *errorMessage = std::string(strerror(errno));
+    }
+    return false;
+  }
+
   this->Internal->Path = name;
   closedir(dir);
   return true;
 }
 
-unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name)
+unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name,
+                                                     std::string* errorMessage)
 {
+  errno = 0;
   DIR* dir = opendir(name.c_str());
 
   if (!dir) {
+    if (errorMessage != nullptr) {
+      *errorMessage = std::string(strerror(errno));
+    }
     return 0;
   }
 
@@ -239,6 +259,13 @@ unsigned long Directory::GetNumberOfFilesInDirectory(const std::string& name)
   for (kwsys_dirent* d = readdir(dir); d; d = readdir(dir)) {
     count++;
   }
+  if (errno != 0) {
+    if (errorMessage != nullptr) {
+      *errorMessage = std::string(strerror(errno));
+    }
+    return false;
+  }
+
   closedir(dir);
   return count;
 }
diff --git a/Source/kwsys/Directory.hxx.in b/Source/kwsys/Directory.hxx.in
index 9b0f4c33c1..7bc9db024e 100644
--- a/Source/kwsys/Directory.hxx.in
+++ b/Source/kwsys/Directory.hxx.in
@@ -35,7 +35,7 @@ public:
    * in that directory. 0 is returned if the directory can not be
    * opened, 1 if it is opened.
    */
-  bool Load(const std::string&);
+  bool Load(const std::string&, std::string* errorMessage = nullptr);
 
   /**
    * Return the number of files in the current directory.
@@ -46,7 +46,8 @@ public:
    * Return the number of files in the specified directory.
    * A higher performance static method.
    */
-  static unsigned long GetNumberOfFilesInDirectory(const std::string&);
+  static unsigned long GetNumberOfFilesInDirectory(
+    const std::string&, std::string* errorMessage = nullptr);
 
   /**
    * Return the file at the given index, the indexing is 0 based
diff --git a/Source/kwsys/Glob.cxx b/Source/kwsys/Glob.cxx
index fad6ee19f7..5452f733b2 100644
--- a/Source/kwsys/Glob.cxx
+++ b/Source/kwsys/Glob.cxx
@@ -182,7 +182,15 @@ bool Glob::RecurseDirectory(std::string::size_type start,
                             const std::string& dir, GlobMessages* messages)
 {
   kwsys::Directory d;
-  if (!d.Load(dir)) {
+  std::string errorMessage;
+  if (!d.Load(dir, &errorMessage)) {
+    if (messages) {
+      if (!errorMessage.empty()) {
+        messages->push_back(Message(Glob::warning,
+                                    "Error listing directory '" + dir +
+                                      "'! Reason: '" + errorMessage + "'"));
+      }
+    }
     return true;
   }
   unsigned long cc;
@@ -278,7 +286,9 @@ void Glob::ProcessDirectory(std::string::size_type start,
   // std::cout << "ProcessDirectory: " << dir << std::endl;
   bool last = (start == this->Internals->Expressions.size() - 1);
   if (last && this->Recurse) {
-    this->RecurseDirectory(start, dir, messages);
+    if (kwsys::SystemTools::FileIsDirectory(dir)) {
+      this->RecurseDirectory(start, dir, messages);
+    }
     return;
   }
 
diff --git a/Source/kwsys/Glob.hxx.in b/Source/kwsys/Glob.hxx.in
index 170766f4b1..b5a34d59a1 100644
--- a/Source/kwsys/Glob.hxx.in
+++ b/Source/kwsys/Glob.hxx.in
@@ -28,6 +28,7 @@ public:
   enum MessageType
   {
     error,
+    warning,
     cyclicRecursion
   };
 
diff --git a/Source/kwsys/testDirectory.cxx b/Source/kwsys/testDirectory.cxx
index b1ab0c8727..eb3ca3254c 100644
--- a/Source/kwsys/testDirectory.cxx
+++ b/Source/kwsys/testDirectory.cxx
@@ -57,7 +57,11 @@ int _doLongPathTest()
 
     Directory testdir;
     // Set res to failure if the directory doesn't load
-    res += !testdir.Load(testdirpath);
+    std::string errorMessage = "";
+    res += !testdir.Load(testdirpath, &errorMessage);
+    if (errorMessage != "") {
+      std::cerr << "Failed to list directory: " << errorMessage << std::endl;
+    }
     // Increment res failure if the directory appears empty
     res += testdir.GetNumberOfFiles() == 0;
     // Increment res failures if the path has changed from
@@ -73,6 +77,34 @@ int _doLongPathTest()
   return res;
 }
 
+int _nonExistentDirectoryTest()
+{
+  using namespace kwsys;
+  int res = 0;
+  std::string testdirpath(TEST_SYSTEMTOOLS_BINARY_DIR
+                          "/directory_testing/doesnt_exist/");
+  std::string errorMessage;
+  Directory testdir;
+
+  errorMessage = "foo";
+  // Increment res failure if directory lists
+  res += testdir.Load(testdirpath, &errorMessage);
+#if !defined(_WIN32) || defined(__CYGWIN__)
+  // Increment res failure if errorMessage is unmodified
+  res += (errorMessage == "foo");
+#endif
+
+  errorMessage = "foo";
+  // Increment res failure if directory has files
+  res += (testdir.GetNumberOfFilesInDirectory(testdirpath, &errorMessage) > 0);
+#if !defined(_WIN32) || defined(__CYGWIN__)
+  // Increment res failure if errorMessage is unmodified
+  res += (errorMessage == "foo");
+#endif
+
+  return res;
+}
+
 int _copyDirectoryTest()
 {
   using namespace kwsys;
@@ -106,5 +138,6 @@ int _copyDirectoryTest()
 
 int testDirectory(int, char* [])
 {
-  return _doLongPathTest() + _copyDirectoryTest();
+  return _doLongPathTest() + _nonExistentDirectoryTest() +
+    _copyDirectoryTest();
 }