obslog: add header to the changeset description diff
This patch adds `diff -r <hash> -r <hash> <filename>` header to the output of
the changeset description diff which is shown using the --patch flag of obslog
command.
This fixes the label/color issue for description diff also.
#!/bin/bash
set -euox pipefail
unset GREP_OPTIONS
NOTOPIC="--config experimental.topic-mode=ignore"
compatbranches=`hg branches --quiet | grep 'mercurial-' | grep -v ':' | sort -n --reverse`
prev='stable'
for branch in $compatbranches; do
hg up $branch
hg merge $prev
hg commit -m "test-compat: merge $prev into $branch"
prev=$branch
done