CI: allow the runner to set a NVD API key

Setting an API key means we get higher rate limits. Because keys are
private, the key must be set in the environment of the runner.

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Jon Mason <jon.mason@arm.com>

.gitlab-ci.yml

@@ -19,6 +19,8 @@ variables:
   ACS_TEST: 0
   # The list of extra Kas fragments to be used when building
   EXTRA_KAS_FILES: ""
+  # The NVD API key to use when fetching CVEs
+  NVDCVE_API_KEY: ""
 
 stages:
   - prep

ci/cve.yml

@@ -5,6 +5,9 @@ local_conf_header:
   cve: |
     INHERIT += "cve-check"
 
+    # Allow the runner environment to provide an API key
+    NVDCVE_API_KEY = "${@d.getVar('BB_ORIGENV').getVar('NVDCVE_API_KEY') or ''}"
+
     # Just show the warnings for our layers
     CVE_CHECK_SHOW_WARNINGS = "0"
     CVE_CHECK_SHOW_WARNINGS:layer-arm-toolchain = "1"