feat(checker): add ruby checker (#4858)

Signed-off-by: Fabrice Fontaine <[email protected]>

Author: ffontaine

cve_bin_tool/checkers/__init__.py

@@ -339,6 +339,7 @@
     "rtmpdump",
     "rsync",
     "rsyslog",
+    "ruby",
     "runc",
     "rust",
     "samba",

cve_bin_tool/checkers/ruby.py

@@ -0,0 +1,20 @@
+# Copyright (C) 2025 Orange
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+
+"""
+CVE checker for ruby
+
+https://www.cvedetails.com/product/12215/Ruby-lang-Ruby.html?vendor_id=7252
+
+"""
+from __future__ import annotations
+
+from cve_bin_tool.checkers import Checker
+
+
+class RubyChecker(Checker):
+    CONTAINS_PATTERNS: list[str] = []
+    FILENAME_PATTERNS: list[str] = []
+    VERSION_PATTERNS = [r"ruby ([0-9]+\.[0-9]+\.[0-9]+)"]
+    VENDOR_PRODUCT = [("ruby-lang", "ruby")]

test/condensed-downloads/libruby2.5_2.5.5-3+deb10u4_amd64.deb.tar.gz

@@ -0,0 +1,33 @@
+# Copyright (C) 2025 Orange
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+mapping_test_data = [
+    {"product": "ruby", "version": "2.6.8", "version_strings": ["ruby 2.6.8"]}
+]
+package_test_data = [
+    {
+        "url": "http://rpmfind.net/linux/fedora/linux/development/rawhide/Everything/aarch64/os/Packages/r/",
+        "package_name": "ruby-libs-3.4.2-23.fc43.aarch64.rpm",
+        "product": "ruby",
+        "version": "3.4.2",
+        "other_products": ["rust"],
+    },
+    {
+        "url": "http://ftp.debian.org/debian/pool/main/r/ruby2.5/",
+        "package_name": "libruby2.5_2.5.5-3+deb10u4_amd64.deb",
+        "product": "ruby",
+        "version": "2.5.5",
+    },
+    {
+        "url": "https://downloads.openwrt.org/releases/packages-19.07/x86_64/packages/",
+        "package_name": "libruby2.6_2.6.10-1_x86_64.ipk",
+        "product": "ruby",
+        "version": "2.6.10",
+    },
+    {
+        "url": "https://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/",
+        "package_name": "ruby-libs-2.6.8-r0.apk",
+        "product": "ruby",
+        "version": "2.6.8",
+    },
+]