Resolve "CI pipeline improvements"

.gitlab-ci.yml

+# docker packages
+image: registry.gitlab.com/islandoftex/images/texlive:TL2021-historic
+
+
+workflow:
+  # avoid to trigger pipeline for each commit
+  # pipeline should be triggered using https://forge.nemo-ocean.eu/nemo/doc/manuals/-/pipelines/new
+  rules:
+    - if: $CI_PIPELINE_SOURCE == 'web'
+    - if: $CI_PIPELINE_SOURCE == 'schedule'
+    - if: $CI_PIPELINE_SOURCE == 'merge_request_event' && $CI_COMMIT_TITLE =~ /(?i).*\[ci\].*/
+
+
 variables:
-  GIT_SUBMODULE_STRATEGY: recursive
+  MANUALS:
+    description: "Manual(s) to be built"
+    value: "all"
+    options:
+      - "all"
+      - "NEMO"
+      - "SI3"
+      - "TOP"
   # input version for release (available only when pipeline is run manually)
+  DRAFT_MODE:
+    description: "Enable/disable latex draft mode (faster rendering without figures)"
+    value: "yes"
+    options:
+      - "yes"
+      - "no"
+  DEBUG_MODE:
+    description: "Print or not latex compilation details in log file for debugging"
+    value: "no"
+    options:
+      - "yes"
+      - "no"
   VERSION:
     value: ""
     description: "Set version release number for manuals"
+  GIT_SUBMODULE_STRATEGY: recursive
+
+
+before_script:
+  - if [[ ${DRAFT_MODE} == "no" ]]; then BUILD_OPT="-p"; fi
+  - if [[ ${DEBUG_MODE} == "yes" ]]; then BASH_OPT="-x"; fi
 
-# docker packages
-image: registry.gitlab.com/islandoftex/images/texlive:TL2021-historic
 
 NEMO manual:
   tags:
     - docker
   stage: build
-  #when: manual
+  rules:
+    - if: ($MANUALS == "NEMO" || $MANUALS == "all")
   script:
-    - version=${CI_COMMIT_REF_NAME}
-    - if [ "x${VERSION}" != "x" ] ; then version=${VERSION} ; fi
-    - bash -x manual_build.sh -r ${version} -p NEMO
+    - bash ${BASH_OPT} manual_build.sh ${BUILD_OPT} -r ${VERSION:-CI_COMMIT_REF_NAME} NEMO
   artifacts:
     paths:
       - NEMO_manual.pdf
     expire_in: 15 mins
 
+
+SI3 manual:
+  tags:
+    - docker
+  stage: build
+  rules:
+    - if: ($MANUALS == "SI3" || $MANUALS == "all")
+  script:
+    - bash ${BASH_OPT} manual_build.sh ${BUILD_OPT} -r ${VERSION:-CI_COMMIT_REF_NAME} SI3
+  artifacts:
+    paths:
+      - SI3_manual.pdf
+    expire_in: 15 mins
+
+
 TOP manual:
   tags:
     - docker
   stage: build
-  #when: manual
+  rules:
+    - if: ($MANUALS == "TOP" || $MANUALS == "all")
   script:
-    - version=${CI_COMMIT_REF_NAME}
-    - if [ "x${VERSION}" != "x" ] ; then version=${VERSION} ; fi
-    - bash -x manual_build.sh -r ${version} -p TOP
+    - bash ${BASH_OPT} manual_build.sh ${BUILD_OPT} -r ${VERSION:-CI_COMMIT_REF_NAME} TOP
   artifacts:
     paths:
       - TOP_manual.pdf
     expire_in: 15 mins
 
-SI3 manual:
+
+# generic job (needs to be parallelized)
+.build_manual:
   tags:
     - docker
   stage: build
-  #when: manual
   script:
-    - version=${CI_COMMIT_REF_NAME}
-    - if [ "x${VERSION}" != "x" ] ; then version=${VERSION} ; fi
-    - bash -x manual_build.sh -r ${version} -p SI3
+    - bash ${BASH_OPT} manual_build.sh ${BUILD_OPT} -r ${VERSION:-$CI_COMMIT_REF_NAME} ${MANUALS}
   artifacts:
     paths:
-      - SI3_manual.pdf
-    expire_in: 15 mins
+      - ./*_manual.pdf
+    expire_in: 15 mins
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