cve_check: cleanup logging

Primarily list the number of patches found, useful when debugging.

Also clean up some bad escaping that caused warnings and use
re.IGNORECASE instead of manually doing case-insenstive rang matches.

(From OE-Core rev: 10acc75b7f3387b968bacd51aade6a8dc11a463f)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/cve_check.py

@@ -79,20 +79,19 @@ def get_patched_cves(d):
     import re
     import oe.patch
 
-    pn = d.getVar("PN")
-    cve_match = re.compile("CVE:( CVE\-\d{4}\-\d+)+")
+    cve_match = re.compile(r"CVE:( CVE-\d{4}-\d+)+")
 
     # Matches the last "CVE-YYYY-ID" in the file name, also if written
     # in lowercase. Possible to have multiple CVE IDs in a single
     # file name, but only the last one will be detected from the file name.
     # However, patch files contents addressing multiple CVE IDs are supported
     # (cve_match regular expression)
-
-    cve_file_name_match = re.compile(".*([Cc][Vv][Ee]\-\d{4}\-\d+)")
+    cve_file_name_match = re.compile(r".*(CVE-\d{4}-\d+)", re.IGNORECASE)
 
     patched_cves = set()
-    bb.debug(2, "Looking for patches that solves CVEs for %s" % pn)
-    for url in oe.patch.src_patches(d):
+    patches = oe.patch.src_patches(d)
+    bb.debug(2, "Scanning %d patches for CVEs" % len(patches))
+    for url in patches:
         patch_file = bb.fetch.decodeurl(url)[2]
 
         # Check patch file name for CVE ID
@@ -100,7 +99,7 @@ def get_patched_cves(d):
         if fname_match:
             cve = fname_match.group(1).upper()
             patched_cves.add(cve)
-            bb.debug(2, "Found CVE %s from patch file name %s" % (cve, patch_file))
+            bb.debug(2, "Found %s from patch file name %s" % (cve, patch_file))
 
         # Remote patches won't be present and compressed patches won't be
         # unpacked, so say we're not scanning them