fix: improved Python binary detection (#1648)

syft/pkg/cataloger/binary/test-fixtures/.gitignore

@@ -0,0 +1 @@
+classifiers/dynamic

syft/pkg/cataloger/binary/test-fixtures/Makefile

@@ -0,0 +1,38 @@
+.PHONY: all
+all: \
+	classifiers/dynamic/python-binary-shared-lib-3.11 \
+	classifiers/dynamic/python-binary-shared-lib-redhat-3.9 \
+	classifiers/dynamic/python-binary-with-version-3.9
+
+classifiers/dynamic/python-binary-shared-lib-3.11:
+	$(eval $@_image := "python:3.11-slim@sha256:0b106e1d2bf485c2a41474bc9cd5103e9eea4e179f40f10741b53b127059221e")
+	./get-image-file.sh $($@_image) \
+		/usr/local/bin/python3.11 \
+		$@/python3
+	./get-image-file.sh $($@_image) \
+		/usr/local/lib/libpython3.11.so.1.0 \
+		$@/libpython3.11.so.1.0
+
+classifiers/dynamic/python-binary-shared-lib-redhat-3.9:
+	$(eval $@_image := "registry.access.redhat.com/ubi8/python-39@sha256:f3cf958b96ce016b63e3e163e488f52e42891304dafef5a0811563f22e3cbad0")
+	./get-image-file.sh $($@_image) \
+		/usr/bin/python3.9 \
+		$@/python3.9
+	./get-image-file.sh $($@_image) \
+		/usr/lib64/libpython3.9.so.1.0 \
+		$@/libpython3.9.so.1.0
+
+classifiers/dynamic/python-binary-with-version-3.9:
+	$(eval $@_image := "python:3.9.16-bullseye@sha256:93fb93c461a2e47a2176706fad1f39eaacd5dd40e19c0b018699a28c03eb2e2a")
+	./get-image-file.sh $($@_image) \
+		/usr/bin/python3.9 \
+		$@/python3.9
+
+.PHONY: clean
+clean:
+	rm -rf classifiers/dynamic
+
+.PHONY: cache.fingerprint
+cache.fingerprint: # for CI
+	$(title,Install test fixture fingerprint)
+	@find ./classifiers/dynamic/* -type f -exec md5sum {} + | awk '{print $1}' | sort | tee /dev/stderr | md5sum | tee cache.fingerprint >> cache.fingerprint

syft/pkg/cataloger/binary/test-fixtures/classifiers/positive/python-source-3.9/patchlevel.h

@@ -1,7 +0,0 @@
-# note: this SHOULD match as python 3.9
-
-some source code...
-
-#define    PY_VERSION   3.9-aZ5
-
-more source!

syft/pkg/cataloger/binary/test-fixtures/get-image-file.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -uxe
+
+CTRID=$(docker create $1)
+
+function cleanup() {
+  docker rm "${CTRID}"
+}
+
+trap cleanup EXIT
+set +e
+
+mkdir -p $(dirname $3)
+
+docker cp ${CTRID}:$2 $3