Use dummy wheels for apple silicon

Reference: aboutcode-org/scancode.io#1646
Signed-off-by: Ayan Sinha Mahapatra <asmahapatra@aboutcode.org>

Author: AyanSinhaMahapatra

.github/workflows/scancode-release.yml

@@ -284,7 +284,7 @@ jobs:
             done
           for f in `find dist -type f -name "scancode_toolkit_mini-*.whl"`; \
             do \
-              venv/bin/python -m pip install --force-reinstall "$f[full]" ; \
+              venv/bin/python -m pip install --find-links=./etc/thirdparty/dummy_dist --force-reinstall "$f[full]" ; \
               venv/bin/scancode -clipeu --json-pp - some.file ; \
             done
 

configure

@@ -141,11 +141,15 @@ CLI_ARGS=$1
 # Defaults. Change these variables to customize this script
 ################################
 
+# extra  arguments passed to pip
+PIP_EXTRA_ARGS=" "
+
 BASE=".[packages]"
 BASE_DEV=".[packages,dev]"
 if [[ $OSTYPE == 'darwin'* ]]; then
     BASE="."
     BASE_DEV=".[dev]"
+    PIP_EXTRA_ARGS="--find-links=./etc/thirdparty/dummy_dist"
 fi
 
 # Requirement arguments passed to pip and used by default or with --dev.
@@ -160,8 +164,6 @@ VIRTUALENV_DIR=venv
 # Cleanable files and directories to delete with the --clean option
 CLEANABLE="build dist venv .cache .eggs *.egg-info docs/_build/ pip-selfcheck.json"
 
-# extra  arguments passed to pip
-PIP_EXTRA_ARGS=" "
 
 # the URL to download virtualenv.pyz if needed
 VIRTUALENV_PYZ_URL=https://bootstrap.pypa.io/virtualenv.pyz

etc/release/scancode-create-release-app-macos.sh

@@ -80,6 +80,10 @@ cp -r \
   dist/licensedcode_index*.whl \
   $release_dir/thirdparty
 
+cp -r \
+  etc/thirdparty/dummy_dist/*.whl \
+  $release_dir/thirdparty
+
 tarball=scancode-toolkit-$(git describe --tags)_py$python_dot_version-$operating_system.tar.gz
 mkdir -p release
 tar -cvzf release/$tarball $release_dir

etc/thirdparty/dummy_dist/README.txt

@@ -0,0 +1,24 @@
+Dummy Wheel Distributions for Apple Silicon (macOS ARM64)
+=========================================================
+
+Overview
+--------
+This directory provides **empty wheel distributions** designed as a workaround to
+allow the installation of `scancode-toolkit` on **Apple Silicon (macOS ARM64)** platforms.
+
+The issue arises because certain required packages, such as `extractcode-7z`, do not
+offer pre-built wheels compatible with Apple Silicon.
+Consequently, `pip` encounters dependency resolution errors during installation.
+
+Purpose
+-------
+The dummy wheels in this project serve as placeholders. These wheels:
+- **Contain no functionality** and are completely empty.
+- Allow `pip` to resolve dependencies correctly by tricking it into treating the
+  required package as already installed.
+
+Caution
+-------
+These dummy wheels **do not provide any actual functionality**.
+They only exist to bypass `pip` dependency resolution issues and allow
+`scancode-toolkit` to be installed on Apple Silicon.