[entropy.server] add PKG_KEYWORDS variable to those exposed to metadata qa check hook

conf/packages/packages.server.qa.exec.example

@@ -24,6 +24,7 @@
 # PKG_LICENSE = package license
 # PKG_BRANCH = package license
 # PKG_DOWNLOAD = package relative download URL
+# PKG_KEYWORDS = package keywords, space separated
 # PKG_MD5 = package file md5 hash
 # PKG_SLOT = package slot
 # PKG_ETPAPI = package Entropy API
@@ -58,6 +59,7 @@ echo "PKG_HOMEPAGE = ${PKG_HOMEPAGE}"
 echo "PKG_LICENSE = ${PKG_LICENSE}"
 echo "PKG_BRANCH = ${PKG_BRANCH}"
 echo "PKG_DOWNLOAD = ${PKG_DOWNLOAD}"
+echo "PKG_KEYWORDS = ${PKG_KEYWORDS}"
 echo "PKG_MD5 = ${PKG_MD5}"
 echo "PKG_SLOT = ${PKG_SLOT}"
 echo "PKG_ETPAPI = ${PKG_ETPAPI}"

libraries/entropy/server/interfaces/main.py

@@ -5101,6 +5101,7 @@ class Server(Client):
             pkg_deps = repo_db.retrieveDependenciesList(package_id)
             pkg_needed = repo_db.retrieveNeeded(package_id, extended = True)
             pkg_provided_libs = repo_db.retrieveProvidedLibraries(package_id)
+            pkg_keywords = repo_db.retrieveKeywords(package_id)
 
             self.output(
                 "[%s] %s: %s" % (
@@ -5129,6 +5130,7 @@ class Server(Client):
             env['PKG_HOMEPAGE'] = const_convert_to_rawstring(pkg_homepage)
             env['PKG_LICENSE'] = str(pkg_license)
             env['PKG_BRANCH'] = str(pkg_branch)
+            env['PKG_KEYWORDS'] = str(" ".join(pkg_keywords))
             env['PKG_DOWNLOAD'] = str(pkg_uri)
             env['PKG_MD5'] = str(pkg_md5)
             env['PKG_SLOT'] = str(pkg_slot)