feat: implemented changes (#2012)

Author: moe-ad

.ci/build_wheel.py

@@ -15,7 +15,8 @@
     "win": "win_amd64",
     "manylinux1": "manylinux1_x86_64",
     "manylinux_2_17": "manylinux_2_17_x86_64",
-    "linux": "manylinux_2_17_x86_64",  # Accommodate tox.ini platform substitutions
+    # Accommodate tox.ini automatic platform substitutions
+    "linux": "manylinux_2_17_x86_64",
     "win32": "win_amd64",
     "darwin": "any",
 }

tox.ini

@@ -1,15 +1,18 @@
 # This is work in progress, testing workflow in local/CI is gradually being transferred to tox
 
 # Usage instructions:
+
 # `tox` will run all tests sequentially, `tox --parallel` will run all tests in parallel (much faster).
 # Run specific selection of tests with `tox -e pretest,<list-of-tests>,posttest` e.g., `tox -e pretest,test-api,test-launcher,posttest`
 # `--parallel` flag can be passed when running specific selections.
 
+# For packaging, build wheels for specific platform with `tox -e build-wheel -- <platform_name>`.
+# If `tox -e build-wheel` is run without passing a platform, tox will automatically build the ffl wheels based on the operating system
+# on which it is executing: windows -> "win_amd64", linux -> "manylinux_2_17_x86_64", mac -> "any"
+
 [tox]
 description = Default tox environment list and core configurations
 
-# List all tests to run in parallel or sequential mode here
-# So invocation can be specified as `tox`/`tox --parallel` to run all tests in sequential/parallel mode
 envlist = pretest,test-{api,launcher,server,local_server,multi_server,remote_workflow,remote_operator,workflow,service,operators},posttest
 
 isolated_build_env = build
@@ -24,17 +27,6 @@ pass_env =
     ANSYSLMD_LICENSE_FILE
     AWP_ROOT242
 
-package = external # To allow custom wheel builds
-
-[testenv:build_external]
-description = Environment for custom build of package wheels, solves PyDPF custom wheel building requirement
-
-package_glob = {toxinidir}{/}dist{/}ansys_dpf_core*
-
-# {on_platform} substitution to automatically detect os type.
-commands = 
-    python .ci/build_wheel.py -p {on_platform} -w
-
 [testenv:pretest]
 description = Environment to kill servers and organize test files prior to testing
 
@@ -115,4 +107,12 @@ deps =
     -r requirements/requirements_test.txt
 
 commands =
-    pytest {env:PYTEST_PYTHON_FILES} {env:DEBUG} {env:COVERAGE} {env:RERUNS} {env:JUNITXML}
+    pytest {env:PYTEST_PYTHON_FILES} {env:DEBUG} {env:COVERAGE} {env:RERUNS} {env:JUNITXML}
+
+[testenv:build-wheel]
+description = Environment for custom build of package wheels
+
+skip_install = True
+
+commands = 
+    python .ci/build_wheel.py -p {posargs:{on_platform}} -w