cve_check: Use a local copy of the database during builds

Rtaher than trying to use a sqlite database over NFS from DL_DIR, work from
a local copy in STAGING DIR after fetching.

(From OE-Core rev: 57de6545695ac11816d670959d9e63666de08e3d)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 03596904392d257572a905a182b92c780d636744)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/classes/cve-check.bbclass

@@ -31,8 +31,9 @@
 CVE_PRODUCT ??= "${BPN}"
 CVE_VERSION ??= "${PV}"
 
-CVE_CHECK_DB_DIR ?= "${DL_DIR}/CVE_CHECK"
-CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/nvdcve_2-2.db"
+CVE_CHECK_DB_FILENAME ?= "nvdcve_2-2.db"
+CVE_CHECK_DB_DIR ?= "${STAGING_DIR}/CVE_CHECK"
+CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/${CVE_CHECK_DB_FILENAME}"
 CVE_CHECK_DB_FILE_LOCK ?= "${CVE_CHECK_DB_FILE}.lock"
 
 CVE_CHECK_LOG ?= "${T}/cve.log"
@@ -198,7 +199,7 @@ python do_cve_check () {
 }
 
 addtask cve_check before do_build
-do_cve_check[depends] = "cve-update-nvd2-native:do_fetch"
+do_cve_check[depends] = "cve-update-nvd2-native:do_unpack"
 do_cve_check[nostamp] = "1"
 
 python cve_check_cleanup () {

meta/recipes-core/meta/cve-update-nvd2-native.bb

@@ -8,7 +8,6 @@ INHIBIT_DEFAULT_DEPS = "1"
 
 inherit native
 
-deltask do_unpack
 deltask do_patch
 deltask do_configure
 deltask do_compile
@@ -35,7 +34,9 @@ CVE_DB_INCR_UPDATE_AGE_THRES ?= "10368000"
 # Number of attempts for each http query to nvd server before giving up
 CVE_DB_UPDATE_ATTEMPTS ?= "5"
 
-CVE_DB_TEMP_FILE ?= "${CVE_CHECK_DB_DIR}/temp_nvdcve_2.db"
+CVE_CHECK_DB_DLDIR_FILE ?= "${DL_DIR}/CVE_CHECK/${CVE_CHECK_DB_FILENAME}"
+CVE_CHECK_DB_DLDIR_LOCK ?= "${CVE_CHECK_DB_DLDIR_FILE}.lock"
+CVE_CHECK_DB_TEMP_FILE ?= "${CVE_CHECK_DB_FILE}.tmp"
 
 python () {
     if not bb.data.inherits_class("cve-check", d):
@@ -52,9 +53,9 @@ python do_fetch() {
 
     bb.utils.export_proxies(d)
 
-    db_file = d.getVar("CVE_CHECK_DB_FILE")
+    db_file = d.getVar("CVE_CHECK_DB_DLDIR_FILE")
     db_dir = os.path.dirname(db_file)
-    db_tmp_file = d.getVar("CVE_DB_TEMP_FILE")
+    db_tmp_file = d.getVar("CVE_CHECK_DB_TEMP_FILE")
 
     cleanup_db_download(db_file, db_tmp_file)
     # By default let's update the whole database (since time 0)
@@ -77,6 +78,7 @@ python do_fetch() {
         pass
 
     bb.utils.mkdirhier(db_dir)
+    bb.utils.mkdirhier(os.path.dirname(db_tmp_file))
     if os.path.exists(db_file):
         shutil.copy2(db_file, db_tmp_file)
 
@@ -89,10 +91,16 @@ python do_fetch() {
         os.remove(db_tmp_file)
 }
 
-do_fetch[lockfiles] += "${CVE_CHECK_DB_FILE_LOCK}"
+do_fetch[lockfiles] += "${CVE_CHECK_DB_DLDIR_LOCK}"
 do_fetch[file-checksums] = ""
 do_fetch[vardeps] = ""
 
+python do_unpack() {
+    import shutil
+    shutil.copyfile(d.getVar("CVE_CHECK_DB_DLDIR_FILE"), d.getVar("CVE_CHECK_DB_FILE"))
+}
+do_unpack[lockfiles] += "${CVE_CHECK_DB_DLDIR_LOCK} ${CVE_CHECK_DB_FILE_LOCK}"
+
 def cleanup_db_download(db_file, db_tmp_file):
     """
     Cleanup the download space from possible failed downloads