templates: add filter to reverse list
The filter supports only lists because for lists, it’s straightforward to
implement. Reversing text doesn’t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.
#!/bin/bash
set -eu
if [[ "$PHABRICATOR_TOKEN" == "NO-PHAB" ]]; then
echo 'Skipping Phabricator Step' >&2
exit 0
fi
revision_in_stack=`hg log \
--rev '.#stack and ::. and topic()' \
-T '\nONE-REV\n' \
| grep 'ONE-REV' | wc -l`
revision_on_phab=`hg log \
--rev '.#stack and ::. and topic() and desc("re:\nDifferential Revision: [^\n]+D\d+$")'\
-T '\nONE-REV\n' \
| grep 'ONE-REV' | wc -l`
if [[ $revision_in_stack -eq 0 ]]; then
echo "stack is empty" >&2
exit 0
fi
if [[ $revision_on_phab -eq 0 ]]; then
echo "no tracked diff in this stack" >&2
exit 0
fi
if [[ $revision_on_phab -lt $revision_in_stack ]]; then
echo "not all stack changesets (${revision_in_stack}) have matching Phabricator Diff (${revision_on_phab})" >&2
exit 2
fi
if [[ "$PHABRICATOR_TOKEN" == "" ]]; then
echo 'missing $PHABRICATOR_TOKEN variable' >&2
echo '(use PHABRICATOR_TOKEN="NO-PHAB" to disable this step)' >&2
exit 2
fi
hg \
--config extensions.phabricator= \
--config phabricator.url=https://phab.mercurial-scm.org/ \
--config phabricator.callsign=HG \
--config auth.phabricator.schemes=https \
--config auth.phabricator.prefix=phab.mercurial-scm.org \
--config auth.phabricator.phabtoken=$PHABRICATOR_TOKEN \
phabsend --rev '.#stack and ::. and topic()' \
"$@"