cve-check.bbclass: always save cve report

The cve-check file should be saved always, it has good info.

Put a copy in the log dir as cve-summary with symlinks to latest run.

[Yocto #13974]

(From OE-Core rev: 859849c7b594d844819ad8c3f7d8325388d94b93)

Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/cve-check.bbclass

@@ -30,6 +30,9 @@ CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/nvdcve_1.1.db"
 
 CVE_CHECK_LOG ?= "${T}/cve.log"
 CVE_CHECK_TMP_FILE ?= "${TMPDIR}/cve_check"
+CVE_CHECK_SUMMARY_DIR ?= "${LOG_DIR}/cve"
+CVE_CHECK_SUMMARY_FILE_NAME ?= "cve-summary"
+CVE_CHECK_SUMMARY_FILE ?= "${CVE_CHECK_SUMMARY_DIR}/${CVE_CHECK_SUMMARY_FILE_NAME}"
 
 CVE_CHECK_DIR ??= "${DEPLOY_DIR}/cve"
 CVE_CHECK_MANIFEST ?= "${DEPLOY_DIR_IMAGE}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.cve"
@@ -46,6 +49,32 @@ CVE_CHECK_PN_WHITELIST ?= ""
 # 
 CVE_CHECK_WHITELIST ?= ""
 
+python cve_save_summary_handler () {
+    import shutil
+    import datetime
+
+    cve_tmp_file = d.getVar("CVE_CHECK_TMP_FILE")
+
+    cve_summary_name = d.getVar("CVE_CHECK_SUMMARY_FILE_NAME")
+    cvelogpath = d.getVar("CVE_CHECK_SUMMARY_DIR")
+    bb.utils.mkdirhier(cvelogpath)
+
+    timestamp = datetime.datetime.now().strftime('%Y%m%d%H%M%S')
+    cve_summary_file = os.path.join(cvelogpath, "%s-%s.txt" % (cve_summary_name, timestamp))
+
+    shutil.copyfile(cve_tmp_file, cve_summary_file)
+
+    if cve_summary_file and os.path.exists(cve_summary_file):
+        cvefile_link = os.path.join(cvelogpath, cve_summary_name)
+
+        if os.path.exists(os.path.realpath(cvefile_link)):
+            os.remove(cvefile_link)
+        os.symlink(os.path.basename(cve_summary_file), cvefile_link)
+}
+
+addhandler cve_save_summary_handler
+cve_save_summary_handler[eventmask] = "bb.event.BuildCompleted"
+
 python do_cve_check () {
     """
     Check recipe for patched and unpatched CVEs
@@ -331,5 +360,8 @@ def cve_write_data(d, patched, unpatched, whitelisted, cve_data):
             f.write(write_string)
 
     if d.getVar("CVE_CHECK_CREATE_MANIFEST") == "1":
+        cvelogpath = d.getVar("CVE_CHECK_SUMMARY_DIR")
+        bb.utils.mkdirhier(cvelogpath)
+
         with open(d.getVar("CVE_CHECK_TMP_FILE"), "a") as f:
             f.write("%s" % write_string)