plugins/semgrep: retrieve chroot root path by using mock.mock_root …

…directly

py/plugins/semgrep.py

@@ -143,14 +143,9 @@ def scan_hook(results, mock, props):
             semgrep_prefix = f"env PATH={semgrep_lib_dir}/bin:$PATH PYTHONPATH={semgrep_lib_dir}"
             # assuming semgrep rules are located under the 'rules' directory
             semgrep_rules_dir = os.path.join(results.tmpdir, "semgrep_rules/rules")
-            # get the chroot root path
-            ec, output = results.get_cmd_output(mock.get_mock_cmd(["--print-root-path"]), shell=False)
-            if ec != 0:
-                results.error("semgrep: failed to get chroot root path", ec=ec)
-            chroot_root_path = output.rstrip("/\n")
             # write the chroot root path to the SEMGREP_SCAN_CHROOT_ROOT_PATH
-            with open(f"{chroot_root_path}{SEMGREP_SCAN_CHROOT_ROOT_PATH}", "w", encoding="utf-8") as f:
-                f.write(chroot_root_path)
+            with open(f"{mock.mock_root}{SEMGREP_SCAN_CHROOT_ROOT_PATH}", "w", encoding="utf-8") as f:
+                f.write(mock.mock_root)
 
             # command to run semgrep scan
             semgrep_scan_cmd = semgrep_prefix + (
@@ -166,8 +161,8 @@ def scan_hook(results, mock, props):
 
             # eventually append the target directory to be scanned
             semgrep_scan_cmd += (
-                f" --output={chroot_root_path}{SEMGREP_SCAN_OUTPUT} {chroot_root_path}{SEMGREP_SCAN_DIR}"
-                f" 2>{chroot_root_path}{SEMGREP_SCAN_LOG}"
+                f" --output={mock.mock_root}{SEMGREP_SCAN_OUTPUT} {mock.mock_root}{SEMGREP_SCAN_DIR}"
+                f" 2>{mock.mock_root}{SEMGREP_SCAN_LOG}"
             )
             # run semgrep scan
             ec = results.exec_cmd(semgrep_scan_cmd, shell=True)