There's a bug in show-changes script where it defaults to values with
single quotes in them. So the default scripts directory is not
"scripts" but "'scripts'". This will be fixed in show-scripts, but for
now work it around here by explicitly defining the directories.
First issue is that on Jenkins, the beginning of the output seems to
be eaten, leaving us only the final part of the reports. This looks
like an issue stemming from redirecting stdout to stdout with
">/dev/stdout". Special case the stdout by not redirecting anything in
such case.
Second issue is that errors printed by the tools we use for generating
the reports go to stderr, so they don't show in the report. So
redirect their stderr to stdout, so the possible errors are visible in
the report file too. We do not want to redirect the stderr of the
print_image_reports function, because that would also capture
debugging stuff from "set -x" that GitHub Actions are using.
This uses the new size-change-report.sh script to print out some
information about largest files being added/removed and files with
greatest increase/decrease in file size between two versions of the
image.
This relies on flatcar_production_image_initrd_contents.txt being
uploaded to the server. It also exports the WITHWTD environment
variable with a value 1, which will make the package-diff script to
try out the wtd contents file variant first.
To review the image changes and the changelog more easily and in case
of fixes, iterate over it without rebuilding the image, move this logic
to its own file where a new job could call it.
