[BL] Add removeFiles().

BaseLib/FileTools.cpp

@@ -204,4 +204,26 @@ void setProjectDirectory(std::string const& dir)
     project_directory_is_set = true;
 }
 
+void removeFiles(std::vector<std::string> const& files)
+{
+    for (auto const& file : files)
+    {
+        int const success = std::remove(file.c_str());
+        if (success == 0)
+        {
+            DBUG("Removed '%s'", file.c_str());
+        }
+        else
+        {
+            if (errno == ENOENT)  // File does not exists
+            {
+                continue;
+            }
+            ERR("Removing file '%s' failed with error %d.", file.c_str(),
+                errno);
+            std::perror("Error: ");
+            OGS_FATAL("Unrecoverable error happened while removing a file.");
+        }
+    }
+}
 } // end namespace BaseLib

BaseLib/FileTools.h

@@ -167,4 +167,7 @@ std::string const& getProjectDirectory();
 /// Sets the project directory.
 void setProjectDirectory(std::string const& dir);
 
-} // end namespace BaseLib
+/// Remove files. If a file does not exist nothing will happen, other errors
+/// lead to OGS_FATAL call.
+void removeFiles(std::vector<std::string> const& files);
+}  // end namespace BaseLib