CI: Attempt to throttle load caused by builds better

Use the support that both make and ninja have to hold back on starting new parallel jobs if load is higher than a set number.

Use the $CI_ONIRO_NUM_CPUS variable if set, or the output of nproc command to set sane values.

For most cases, this means that CI runners don't have to set anything, as nproc output should be fine.

Closes eclipse/oniro-core/meta-openharmony#33

Signed-off-by: Esben Haabendal esben.haabendal@huawei.com

.gitlab-ci.yml

@@ -77,6 +77,10 @@ stages:
     # something like that... Without this we get errors like
     #     fatal: couldn't find remote ref refs/heads/master
     - git checkout -b master
+    # The repo command does not like shallow repos
+    - if [ "$(git rev-parse --is-shallow-repository)" = "true" ] ; then
+        git fetch --unshallow ;
+      fi
     # Create/maintain a mirror of all manifest repositories in runner
     # persistent storage, and use that as reference when initializing the
     # build repo, effectively reducing the time spent fetching git repos to