Clearer scratch paths (#1100)

Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [0.3.9]
 
+### Changed
+
+- Changed prefix of scratch directories to have the datetime in it for easier debugging
+
 ### Fixed
 
 - DFTB+ recipes now won't crash when `kpts=None` for structures with PBCs

src/quacc/runners/calc.py

@@ -2,6 +2,7 @@
 from __future__ import annotations
 
 import os
+from datetime import datetime
 from pathlib import Path
 from shutil import rmtree
 from tempfile import mkdtemp
@@ -265,7 +266,10 @@ def _calc_setup(
  )
 
  # Create a tmpdir for the calculation within the scratch_dir
- tmpdir = Path(mkdtemp(prefix="quacc-tmp-", dir=SETTINGS.SCRATCH_DIR)).resolve()
+ time_now = datetime.utcnow().strftime("%Y-%m-%d-%H-%M-%S-%f")
+ tmpdir = Path(
+ mkdtemp(prefix=f"quacc-tmp-{time_now}-", dir=SETTINGS.SCRATCH_DIR)
+ ).resolve()
 
  # Create a symlink to the tmpdir in the results_dir
  if os.name != "nt" and SETTINGS.SCRATCH_DIR != SETTINGS.RESULTS_DIR: