#!/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()' \

"$@"