[DRAFT] timestamp gitlab ci job outputs

Based on previous work by @alvicsam in #13047.

TODO: Update jobs that override after_script

Author: Mira Ressel

.gitlab-ci.yml

@@ -110,11 +110,21 @@ variables:
   before_script:
     - if echo "$CI_DISABLED_JOBS" | grep -xF "$CI_JOB_NAME"; then echo "The job has been cancelled in CI settings"; exit 0; fi
 
+.timestamp:
+  before_script:
+    - source scripts/ci/gitlab/timestamp.sh
+  after_script:
+    - exec >/dev/null 2>&1
+    - wait ${TIMESTAMP_PID}
+
 .kubernetes-env:
   image: "${CI_IMAGE}"
   before_script:
+    - !reference [.timestamp, before_script]
     - !reference [.job-switcher, before_script]
     - !reference [.prepare-env, before_script]
+  after_script:
+    - !reference [.timestamp, after_script]
   tags:
     - kubernetes-parity-build
 
@@ -141,13 +151,15 @@ variables:
 .docker-env:
   image: "${CI_IMAGE}"
   before_script:
+    - !reference [.timestamp, before_script]
     - !reference [.job-switcher, before_script]
     - !reference [.prepare-env, before_script]
     - !reference [.rust-info-script, script]
     - !reference [.rusty-cachier, before_script]
     - !reference [.pipeline-stopper-vars, script]
   after_script:
     - !reference [.rusty-cachier, after_script]
+    - !reference [.timestamp, after_script]
   tags:
     - linux-docker
 

scripts/ci/gitlab/timestamp.sh

@@ -0,0 +1,24 @@
+# https://gist.github.com/altaua/477285db40181ef1793bbed5bae32c6b
+# based on https://gist.github.com/jstine35/e0fc0e06ec06d74bc3ebd67585bf2a1d
+# edited to use just a single process substitution
+#  and print the last line of output even if it isn't \n-terminated
+
+s_datestamp() {
+
+  eof=""
+  while [[ -z "${eof}" ]]; do
+
+    IFS="" read -r line || eof=1
+    timestamp=$(date -u '+%Y-%m-%d %H:%M:%S')
+
+    printf '[%s] %s\n' "${timestamp}" "${line}"
+
+  done
+}
+
+exec > >(s_datestamp) 2>&1
+TIMESTAMP_PID=$!
+
+# at the end of the script, wait for the process substitution before exiting:
+# exec >/dev/null 2>&1
+# wait ${TIMESTAMP_PID}