Modify qpush/qpop idempotent operations to return success Modify qpush/qpop such that idempotent instances of the operations return success. That is, repeated qpush -a, qpop -a, qpush patch-name or qpop patch-name will return success. The end goal of each of these operations is to reach a particular state. Whether or not the patches were already applied does not affect that state or operation status. Likewise, be careful to retain the error status on a qpush/qpop without arguments when the end/beginning of the series has been reached.

#!/bin/sh

echo "[extensions]" >> $HGRCPATH
echo "extdiff=" >> $HGRCPATH

hg init a
cd a
echo a > a
hg add
hg extdiff -o -r $opt

echo "[extdiff]" >> $HGRCPATH
echo "cmd.falabala=echo" >> $HGRCPATH
echo "opts.falabala=diffing" >> $HGRCPATH

hg falabala

hg help falabala

hg ci -d '0 0' -mtest1

echo b >> a
hg ci -d '1 0' -mtest2

hg falabala -r 0:1

# test diff during merge
hg update 0
echo b >> b
hg add b
hg ci -m "new branch" -d '1 0'
hg update -C 1
hg merge tip
hg falabala || echo "diff-like tools yield a non-zero exit code"