feat add Path

src/filesystem/path.cc

@@ -0,0 +1,46 @@
+#include "sled/filesystem/path.h"
+#include "sled/log/log.h"
+#include <errno.h>
+#include <unistd.h>
+
+namespace sled {
+Path
+Path::Current()
+{
+    char tmp_path[PATH_MAX];
+    if (getcwd(tmp_path, PATH_MAX)) {
+        auto cwd = Path(tmp_path);
+        return cwd;
+    }
+
+    LOGE("Path", "getcwd failed: {}", strerror(errno));
+
+    return Path();
+}
+
+Path
+Path::Home()
+{
+    char *home = getenv("HOME");
+    if (home) {
+        return Path(home);
+    } else {
+        return Path();
+    }
+}
+
+Path
+Path::TempDir()
+{
+    char *tmp = getenv("TMPDIR");
+    if (tmp) {
+        return Path(tmp);
+    } else {
+        return Path("/tmp/");
+    }
+}
+
+Path::Path() {}
+
+Path::Path(const std::string &path) : path_(path) {}
+}// namespace sled