auto-detect timing job name

buildjob

@@ -16,10 +16,11 @@ set -eo pipefail
 ##   Requires the $OPAM_UPDATE_SECRET variable to be set.  This only happens if
 ##   the current branch is $OPAM_PKG_BRANCH, or master if that variable is
 ##   empty.
-## - $TIMING_PROJECT, $TIMING_CONF, $TIMING_SECRET: If $TIMING_CONF is
-##   non-empty, submit timing information to coq-speed with the given project
-##   name and configuration string.  The project names defaults to the
-##   repository name.  Reqires the $TIMING_SECRET variable to be set.
+## - $TIMING_PROJECT, $TIMING_CONF, $TIMING_SECRET: When running on the
+##   `coop-timing` runner, submit timing information to coq-speed with the given
+##   project name and configuration string.  $TIMING_PROJECT defaults to the
+##   repository name.  $TIMING_CONF defaults to the job name.  Reqires the
+##   $TIMING_SECRET variable to be set.
 ## - $DOC_DIR, $DOC_BRANCH, $DOC_KEY, $DOC_OPTS: If $DOC_DIR is non-empty, run
 ##   coqdoc and upload the results to the given directory.  This only happens if
 ##   the current branch is $DOC_BRANCH (defaults to master).  Requires the
@@ -33,6 +34,7 @@ OCAML=${OCAML:-ocaml-base-compiler.4.07.1}
 OPAM_PKG_BRANCH=${OPAM_PKG_BRANCH:-master}
 DOC_BRANCH=${DOC_BRANCH:-master}
 TIMING_PROJECT=${TIMING_PROJECT:-$CI_PROJECT_NAME}
+TIMING_CONF=${TIMING_CONF:-$CI_JOB_NAME}
 
 # Environment sanity checks
 if [[ -n "$VALIDATE" ]]; then
@@ -55,7 +57,7 @@ status "[buildjob] Perfoming build"
 time make --output-sync --no-print-directory -k -j$CPU_CORES 2>&1
 
 # maybe submit timing information
-if [[ -n "$TIMING_CONF" ]]; then
+if [[ "$CI_RUNNER_DESCRIPTION" == "coop-timing" ]]; then
     # collect all information into one file
     status "[buildjob] Build performance information"
     find -name "*.v.perf" -print0 | xargs -0 cat > build-times.txt