[PATCH] cve-check: Fix report generation

["Marta Rybczynska" <rybczynska@gmail.com>]

The addition of summary output caused two issues: error when building
an image and the fact that JSON output was generated even when
CVE_CHECK_FORMAT_JSON.

When generating an image it caused an error like:
ERROR: core-image-minimal-1.0-r0 do_rootfs: Error executing a python function in exec_func_python() autogenerated:

  The stack trace of python calls that resulted in this exception/failure was:
  File: 'exec_func_python() autogenerated', lineno: 2, function: <module>
       0001:
   *** 0002:cve_check_write_rootfs_manifest(d)
       0003:
  File: '/home/alexk/poky/meta/classes/cve-check.bbclass', lineno: 213, function: cve_check_write_rootfs_manifest
       0209:
       0210:        link_path = os.path.join(deploy_dir, "%s.json" % link_name)
       0211:        manifest_path = d.getVar("CVE_CHECK_MANIFEST_JSON")
       0212:        bb.note("Generating JSON CVE manifest")
   *** 0213:        generate_json_report(json_summary_name, json_summary_link_name)
       0214:        bb.plain("Image CVE JSON report stored in: %s" % link_path)
       0215:}
       0216:
       0217:ROOTFS_POSTPROCESS_COMMAND:prepend = "${@'cve_check_write_rootfs_manifest; ' if d.getVar('CVE_CHECK_CREATE_MANIFEST') == '1' else ''}"
  Exception: NameError: name 'json_summary_name' is not defined

The fix is to pass the d variable to the pure python function generate_json_report
to get correct values of variables and add conditions for the JSON
output where needed.

In addition clarify the message presenting the summary JSON file,
which isn't related to an image.

Uses partial fixes from Alex Kiernan, Ernst Sjöstrand (ernstp),
and Davide Gardenal.

Fixes: f2987891d315 ("cve-check: add JSON format to summary output")

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
---
 meta/classes/cve-check.bbclass | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/meta/classes/cve-check.bbclass b/meta/classes/cve-check.bbclass
index 24ddb865ea..7cd98ae462 100644
--- a/meta/classes/cve-check.bbclass
+++ b/meta/classes/cve-check.bbclass
@@ -79,7 +79,7 @@ CVE_CHECK_LAYER_INCLUDELIST ??= ""
 # set to "alphabetical" for version using single alphabetical character as increment release
 CVE_VERSION_SUFFIX ??= ""
 
-def generate_json_report(out_path, link_path):
+def generate_json_report(d, out_path, link_path):
     if os.path.exists(d.getVar("CVE_CHECK_SUMMARY_INDEX_PATH")):
         import json
         from oe.cve_check import cve_check_merge_jsons
@@ -127,10 +127,11 @@ python cve_save_summary_handler () {
                     os.remove(cvefile_link)
                 os.symlink(os.path.basename(cve_summary_file), cvefile_link)
 
+    if d.getVar("CVE_CHECK_FORMAT_JSON") == "1":
         json_summary_link_name = os.path.join(cvelogpath, d.getVar("CVE_CHECK_SUMMARY_FILE_NAME_JSON"))
         json_summary_name = os.path.join(cvelogpath, "%s-%s.json" % (cve_summary_name, timestamp))
-        generate_json_report(json_summary_name, json_summary_link_name)
-        bb.plain("CVE report summary created at: %s" % json_summary_link_name)
+        generate_json_report(d, json_summary_name, json_summary_link_name)
+        bb.plain("Complete CVE JSON report summary created at: %s" % json_summary_link_name)
 }
 
 addhandler cve_save_summary_handler
@@ -207,11 +208,12 @@ python cve_check_write_rootfs_manifest () {
                 os.symlink(os.path.basename(manifest_name), manifest_link)
             bb.plain("Image CVE report stored in: %s" % manifest_name)
 
-        link_path = os.path.join(deploy_dir, "%s.json" % link_name)
-        manifest_path = d.getVar("CVE_CHECK_MANIFEST_JSON")
-        bb.note("Generating JSON CVE manifest")
-        generate_json_report(json_summary_name, json_summary_link_name)
-        bb.plain("Image CVE JSON report stored in: %s" % link_path)
+        if d.getVar("CVE_CHECK_FORMAT_JSON") == "1":
+            link_path = os.path.join(deploy_dir, "%s.json" % link_name)
+            manifest_path = d.getVar("CVE_CHECK_MANIFEST_JSON")
+            bb.note("Generating JSON CVE manifest")
+            generate_json_report(d, manifest_path, link_path)
+            bb.plain("Image CVE JSON report stored in: %s" % link_path)
 }
 
 ROOTFS_POSTPROCESS_COMMAND:prepend = "${@'cve_check_write_rootfs_manifest; ' if d.getVar('CVE_CHECK_CREATE_MANIFEST') == '1' else ''}"
-- 
2.33.0