CI: support extra kas files from environment

Extend jobs-to-kas so the first argument is still the GitLab job name,
but allow further arguments to specify extra Kas files to use in
addition.

Then add a variable EXTRA_KAS_FILES to the CI configuration that
defaults to the empty string and pass this to jobs-to-kas.

This lets specific pipeline runs add extra Kas files, for example to use
experimental branches or enable extra features without touching the CI
directly.

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

.gitlab-ci.yml

@@ -11,6 +11,7 @@ variables:
   FF_USE_LEGACY_KUBERNETES_EXECUTION_STRATEGY: 0
   ACS_TEST: 0
   ACS_TAG: ""
+  EXTRA_KAS_FILES: ""
 
 stages:
   - prep
@@ -61,7 +62,7 @@ stages:
     # Catch all for everything else
     - if: '$KERNEL != "linux-yocto-dev"'
   script:
-    - KASFILES=$(./ci/jobs-to-kas "$CI_JOB_NAME"):lockfile.yml
+    - KASFILES=$(./ci/jobs-to-kas "$CI_JOB_NAME" $EXTRA_KAS_FILES):lockfile.yml
     - kas dump --update --force-checkout --resolve-refs --resolve-env $KASFILES
     - kas build $KASFILES
     - ./ci/check-warnings $KAS_WORK_DIR/build/warnings.log

ci/jobs-to-kas

@@ -6,14 +6,25 @@
 #   corstone1000-mps3
 #   fvp-base: [testimage]
 #   qemuarm64-secureboot: [clang, glibc, testimage]
+# This argument should be quoted to avoid expansion and to be handled
+# as a single value.
+#
+# Any further arguments will be handled as further yml file basenames.
 #
 # Turn this list into a series of yml files separated by colons to pass to kas
 
 set -e -u
 
-FILES="ci/$(echo $1 | cut -d ':' -f 1).yml"
+# First, parse the GitLab CI job name (CI_JOB_NAME via $1) and accumulate a list
+# of Kas files.
+JOBNAME="$1"
+shift
 
-for i in $(echo $1 | cut -s -d ':' -f 2 | sed 's/[][,]//g'); do
+# The base name of the job
+FILES="ci/$(echo $JOBNAME | cut -d ':' -f 1).yml"
+
+# The list of matrix variations
+for i in $(echo $JOBNAME | cut -s -d ':' -f 2 | sed 's/[][,]//g'); do
 	# Given that there are no yml files for gcc or glibc, as those are the
 	# defaults, we can simply ignore those parameters.  They are necessary
 	# to pass in so that matrix can correctly setup all of the permutations
@@ -24,4 +35,9 @@ for i in $(echo $1 | cut -s -d ':' -f 2 | sed 's/[][,]//g'); do
 	FILES+=":ci/$i.yml"
 done
 
+# Now pick up any further names
+for i in $*; do
+	FILES+=":ci/$i.yml"
+done
+
 echo $FILES