fix(GitHubAction): migrate to pathlib.Path in template rendering

ci/update.py

@@ -3,17 +3,15 @@
 # Updates any files with templates in <project root>/ci/templates directory by
 # running 'python3 ci/update.py --no-env'
 # Typically, github workflow files are generated with the help of tox and its config.
-from __future__ import absolute_import, print_function, unicode_literals
-
 import os
+import pathlib
 import subprocess
 import sys
-from os.path import abspath, dirname, exists, join, relpath
 
 import toml
 
-base_path = dirname(dirname(abspath(__file__)))
-templates_path = join(base_path, "ci", "templates")
+base_path: pathlib.Path = pathlib.Path(__file__).resolve().parent.parent
+templates_path = base_path / "ci" / "templates"
 
 
 def check_call(args):
@@ -22,12 +20,12 @@ def check_call(args):
 
 
 def exec_in_env():
-    env_path = join(base_path, ".tox", "bootstrap")
+    env_path = base_path / ".tox" / "bootstrap"
     if sys.platform == "win32":
-        bin_path = join(env_path, "Scripts")
+        bin_path = env_path / "Scripts"
     else:
-        bin_path = join(env_path, "bin")
-    if not exists(env_path):
+        bin_path = env_path / "bin"
+    if not env_path.exists():
         import subprocess
 
         print("Making bootstrap env in: {0} ...".format(env_path))
@@ -39,10 +37,10 @@ def exec_in_env():
             except subprocess.CalledProcessError:
                 check_call(["virtualenv", env_path])
         print("Installing `jinja2` into bootstrap environment...")
-        check_call([join(bin_path, "pip"), "install", "jinja2", "tox"])
-    python_executable = join(bin_path, "python")
-    if not os.path.exists(python_executable):
-        python_executable += '.exe'
+        check_call([bin_path / "pip", "install", "jinja2", "tox"])
+    python_executable = bin_path / "python"
+    if not python_executable.exists():
+        python_executable = python_executable.with_suffix('.exe')
 
     print("Re-executing with: {0}".format(python_executable))
     print("+ exec", python_executable, __file__, "--no-env")
@@ -53,10 +51,10 @@ def main():
     import jinja2
 
     print("Project path: {0}".format(base_path))
-    project_meta = toml.load(join(base_path, 'pyproject.toml'))
+    project_meta = toml.load(base_path / 'pyproject.toml')
 
     jinja = jinja2.Environment(
-        loader=jinja2.FileSystemLoader(templates_path),
+        loader=jinja2.FileSystemLoader(str(templates_path)),
         trim_blocks=True,
         lstrip_blocks=True,
         keep_trailing_newline=True,
@@ -77,22 +75,21 @@ def main():
         if line.startswith('py')
     ]
 
-    for root, _, files in os.walk(templates_path):
-        for name in files:
-            if name == ".DS_Store":
-                continue
-            relative = relpath(root, templates_path)
-            with open(join(base_path, relative, name), "w") as fh:
-                fh.write(
-                    jinja.get_template(join(relative, name)).render(
-                        tox_environments=tox_environments,
-                        url_docs=project_meta['project']['urls']['documentation'],
-                        cov_report_path=project_meta['tool']['coverage']['report']['path'],
-                        # Python version to use for general tasks: docs (when tox did not set one)
-                        py_ver='.'.join(sys.version.split('.')[:2]),
-                    )
+    for template in templates_path.rglob('*'):
+        if template.is_file() and template.name != ".DS_Store":
+            template_path = str(template.relative_to(templates_path))
+            destination = base_path / template_path
+            destination.parent.mkdir(parents=True, exist_ok=True)
+            destination.write_text(
+                jinja.get_template(template_path).render(
+                    tox_environments=tox_environments,
+                    docs_url=project_meta['project']['urls']['documentation'],
+                    cov_report_path=project_meta['tool']['coverage']['report']['path'],
+                    # Python version to use for general tasks: docs (when tox did not set one)
+                    py_ver='.'.join(sys.version.split('.')[:2]),
                 )
-            print("Wrote {}".format(name))
+            )
+            print("Wrote {}".format(template_path))
     print("DONE.")