add Path::exists()

src/lib/include/jes/Path.h

@@ -14,6 +14,7 @@ namespace jes
         Path dirname();
         Path join(const Path & other);
         const std::string & to_s() { return m_path; }
+        bool exists();
     protected:
         void clean();
         std::string m_path;

src/lib/src/Path.cc

@@ -1,4 +1,7 @@
 #include "jes/Path.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 namespace jes
 {
@@ -46,6 +49,12 @@ namespace jes
             return Path(m_path + '/' + other.m_path);
     }
 
+    bool Path::exists()
+    {
+        struct stat st;
+        return stat(m_path.c_str(), &st) == 0;
+    }
+
     void Path::clean()
     {
         for (char & c : m_path)