Bug 1597928 - Snap repackage: Stop fetching scripts from the hg.mozilla.org archive endpoint r=jlund

Differential Revision: https://phabricator.services.mozilla.com/D53933

--HG--
extra : moz-landing-system : lando

taskcluster/ci/release-snap-repackage/kind.yml

@@ -35,12 +35,7 @@ job-defaults:
         command:
             - /bin/bash
             - -cx
-            - >
-              curl -o scripts.tar.bz2 {config_params[head_repository]}/archive/{config_params[head_rev]}.tar.bz2/taskcluster/docker/firefox-snap/ &&
-              mkdir scripts &&
-              tar xvfj scripts.tar.bz2 -C scripts --strip-components 4 &&
-              cd scripts &&
-              ./runme.sh
+            - ./runme.sh
         env:
             VERSION: "{release_config[version]}"
             BUILD_NUMBER: "{release_config[build_number]}"

taskcluster/docker/firefox-snap/Dockerfile

@@ -2,5 +2,15 @@ FROM snapcore/snapcraft:stable
 
 RUN apt-get update && apt-get install -qy python3 bzip2 curl git && apt-get clean
 
+RUN mkdir /scripts/
+WORKDIR /scripts/
+# Copy everything in the docker/firefox-snap folder but the Dockerfile
+#
+# XXX The following pattern is neither a regex nor a glob one. It's
+# documented at https://golang.org/pkg/path/filepath/#Match. There's no
+# way of explicitly filtering out "Dockerfile". If one day, someone needs
+# to add a file starting with "D", then we must revisit the pattern below.
+COPY [^D]* /scripts/
+
 # Set a default command useful for debugging
 CMD ["/bin/bash", "--login"]