contrib: add a small script to refresh all diff in the current stack

This will be useful to introduce automatic refresh through heptapod.

Differential Revision: https://phab.mercurial-scm.org/D9460

contrib/phab-refresh-stack.sh

@@ -0,0 +1,34 b''
+#!/bin/bash
+set -eu
+
+revision_in_stack=`hg log --rev '.#stack and ::.' -T '\nONE-REV\n' | grep 'ONE-REV' | wc -l`
+revision_on_phab=`hg log --rev '.#stack and ::. 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 1
+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 $PHABRICATOR_TOKEN variable' >&2
+    exit 2
+fi
+
+hg \
+--config extensions.phabricator= \
+--config phabricator.url=https://phab.mercurial-scm.org/ \
+--config phabricator.callsign=HG \
+--config auth.phabricator.schemes=https \
+--config auth.phabricator.prefix=phab.mercurial-scm.org \
+--config auth.phabricator.phabtoken=$PHABRICATOR_TOKEN \
+phabsend --rev '.#stack and ::.'