CODECS with Temporary files using tempfile.mkdtemp() enabling multiple processing.

src/cq_cli/cqcodecs/codec_helpers.py

@@ -1,10 +1,43 @@
 from contextlib import contextmanager, redirect_stderr, redirect_stdout
 from os import devnull
-
+import tempfile
+import shutil
+import logging
 
 @contextmanager
 def suppress_stdout_stderr():
     """A context manager that redirects stdout and stderr to devnull"""
+    logging.info("STDOUT and STDERR are send to devnull.")
     with open(devnull, "w") as fnull:
         with redirect_stderr(fnull) as err, redirect_stdout(fnull) as out:
             yield (err, out)
+
+
+class temp_dir():
+    def __init__(self):
+        """
+        A function to create temp codec files inside temporary directories, and
+        enable multiple codec processing, preventing file writing racing conditions.
+        Returns
+        -------
+        str, Temporary directory path.
+        """
+        self.path = tempfile.mkdtemp()
+        logging.debug(f"temp_dir: {self.path}")
+
+    def dlt(self):
+        """
+        Safe temp_dir deletion and path invalidation.
+        Returns
+        -------
+        None.
+
+        """
+        if self.path:
+            shutil.rmtree(self.path)
+            self.path = None
+            logging.debug("temp_dir.path: deleted")
+            return True
+        else:
+            logging.error("temp_dir.path: does not exist.")
+            return False

src/cq_cli/cqcodecs/cq_codec_dxf.py

@@ -1,12 +1,12 @@
-import os, tempfile
+import os
 from cadquery import exporters
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_dxf.dxf")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_dxf.dxf")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():

src/cq_cli/cqcodecs/cq_codec_glb.py

@@ -1,11 +1,11 @@
-import os, tempfile
+import os
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_glb.glb")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_glb.glb")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():

src/cq_cli/cqcodecs/cq_codec_gltf.py

@@ -1,11 +1,11 @@
-import os, tempfile
+import os
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_gltf.gltf")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_gltf.gltf")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():

src/cq_cli/cqcodecs/cq_codec_step.py

@@ -1,13 +1,12 @@
-import os, tempfile
+import os
 from cadquery import exporters
-import cadquery as cq
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_step.step")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_step.step")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():

src/cq_cli/cqcodecs/cq_codec_stl.py

@@ -1,13 +1,11 @@
-import os, tempfile
-from cadquery import exporters
-import cadquery as cq
+import os
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_stl.stl")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_stl.stl")
 
     linearDeflection = 0.1
     angularDeflection = 0.1

src/cq_cli/cqcodecs/cq_codec_svg.py

@@ -1,12 +1,12 @@
-import os, tempfile
+import os
 from cadquery import exporters
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_svg.svg")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_svg.svg")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():

src/cq_cli/cqcodecs/cq_codec_threejs.py

@@ -1,13 +1,12 @@
-import os, tempfile
+import os
 from cadquery import exporters
-import cadquery as cq
 import cq_cli.cqcodecs.codec_helpers as helpers
 
 
 def convert(build_result, output_file=None, error_file=None, output_opts=None):
     # Create a temporary file to put the STL output into
-    temp_dir = tempfile.gettempdir()
-    temp_file = os.path.join(temp_dir, "temp_threejs.json")
+    temp_dir = helpers.temp_dir()
+    temp_file = os.path.join(temp_dir.path, "temp_threejs.json")
 
     # The exporters will add extra output that we do not want, so suppress it
     with helpers.suppress_stdout_stderr():