[OE-core] [PATCH 5/5] cve-update-db-native: don't refresh more than once an hour

[Ross Burton]

We already fetch the yearly CVE metadata and check that for updates before
downloading the full data, but we can speed up CVE checking further by only
checking the CVE metadata once an hour.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/recipes-core/meta/cve-update-db-native.bb | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-core/meta/cve-update-db-native.bb b/meta/recipes-core/meta/cve-update-db-native.bb
index 2c427a5884f..19875a49b1c 100644
--- a/meta/recipes-core/meta/cve-update-db-native.bb
+++ b/meta/recipes-core/meta/cve-update-db-native.bb
@@ -31,8 +31,16 @@ python do_populate_cve_db() {
     db_dir = os.path.join(d.getVar("DL_DIR"), 'CVE_CHECK')
     db_file = os.path.join(db_dir, 'nvdcve_1.0.db')
     json_tmpfile = os.path.join(db_dir, 'nvd.json.gz')
-    proxy = d.getVar("https_proxy")
 
+    # Don't refresh the database more than once an hour
+    try:
+        import time
+        if time.time() - os.path.getmtime(db_file) < (60*60):
+            return
+    except OSError:
+        pass
+
+    proxy = d.getVar("https_proxy")
     if proxy:
         # instantiate an opener but do not install it as the global
         # opener unless if we're really sure it's applicable for all
-- 
2.20.1