ci: Use ci-templates for building image

This rebuilds the automaticaly whenever the image tag changes. Whenever
something in the image needs to change, alter the installation script
and change the tag to the current date.

This removes the -s (strict) argument from js68, as it doesn't exist in
js78.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1492>

.gitlab-ci.yml

@@ -1,6 +1,9 @@
-include: 'https://gitlab.gnome.org/GNOME/citemplates/raw/master/flatpak/flatpak_ci_initiative.yml'
+include:
+    - remote: 'https://gitlab.gnome.org/GNOME/citemplates/raw/master/flatpak/flatpak_ci_initiative.yml'
+    - remote: 'https://gitlab.freedesktop.org/freedesktop/ci-templates/-/raw/5888c7388134cbe4661600222fe9befb10441f6e/templates/fedora.yml'
 
 stages:
+ - prep
  - review
  - build
  - test
@@ -18,6 +21,41 @@ variables:
         - tags
         - merge_requests
 
+.gnome-shell.fedora:33:
+    variables:
+        FDO_DISTRIBUTION_VERSION: 33
+        FDO_DISTRIBUTION_TAG: '2020-11-17.0'
+        FDO_UPSTREAM_REPO: GNOME/gnome-shell
+        FDO_DISTRIBUTION_EXEC: |
+            # For syntax checks using js78
+            dnf install -y findutils mozjs78-devel &&
+
+            # For static analysis with eslint
+            dnf install -y nodejs &&
+            npm install -g eslint &&
+
+            dnf group install -y 'Development Tools' \
+                                 'C Development Tools and Libraries' &&
+            dnf install -y meson &&
+            dnf install -y 'pkgconfig(gio-2.0)' 'pkgconfig(gio-unix-2.0)' \
+                           'pkgconfig(gnome-autoar-0)' 'pkgconfig(json-glib-1.0)' &&
+
+            ./.gitlab-ci/install-meson-project.sh \
+                -Dman=false \
+                https://gitlab.gnome.org/GNOME/gnome-shell.git \
+                3.38.0 \
+                subprojects/extensions-tool/ \
+                ./generate-translations.sh &&
+
+            dnf clean all
+
+build-fedora-container:
+    extends:
+        - .fdo.container-build@fedora@x86_64
+        - .gnome-shell.fedora:33
+    stage: prep
+    <<: *only_default
+
 check_commit_log:
     image: registry.gitlab.gnome.org/gnome/mutter/master:v4
     stage: review
@@ -34,10 +72,12 @@ check_commit_log:
             junit: commit-message-junit-report.xml
 
 js_check:
-    image: registry.gitlab.gnome.org/gnome/gnome-shell/extension-ci:v2
+    extends:
+        - .fdo.distribution-image@fedora
+        - .gnome-shell.fedora:33
     stage: review
     script:
-        - find js -name '*.js' -exec js68 -c -s '{}' ';' 2>&1 | tee $JS_LOG
+        - find js -name '*.js' -exec js78 -c '{}' ';' 2>&1 | tee $JS_LOG
         - (! grep -q . $JS_LOG)
     <<: *only_default
     artifacts:
@@ -46,7 +86,9 @@ js_check:
         when: on_failure
 
 eslint:
-    image: registry.gitlab.gnome.org/gnome/gnome-shell/extension-ci:v2
+    extends:
+        - .fdo.distribution-image@fedora
+        - .gnome-shell.fedora:33
     stage: review
     script:
         - export NODE_PATH=$(npm root -g)
@@ -73,14 +115,18 @@ eslint_mr:
         when: always
 
 potfile_check:
-    image: registry.gitlab.gnome.org/gnome/gnome-shell/extension-ci:v2
+    extends:
+        - .fdo.distribution-image@fedora
+        - .gnome-shell.fedora:33
     stage: review
     script:
         - ./.gitlab-ci/check-potfiles.sh
     <<: *only_default
 
 no_template_check:
-    image: registry.gitlab.gnome.org/gnome/gnome-shell/extension-ci:v2
+    extends:
+        - .fdo.distribution-image@fedora
+        - .gnome-shell.fedora:33
     stage: review
     script:
         - ./.gitlab-ci/check-template-strings.sh