view tests/test-mq-qsave.t @ 16722:7bf48bc7de23 stable

hgweb: fix filediff base calculation

Previously, we were finding the most recent version of a file in a
changeset and comparing it against its first file parent. This was
wrong on three counts:

- it would show a diff in revisions where there was no change to a file
- it would show a diff when only the exec bit changed
- it would potentially compare against a much older changeset, which
  could be very expensive if git-style rename detection was enabled

This compares the file in the current context with that context's
parent, which may result in an empty diff when looking at a file not
touched by the current changeset.

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

  $ hg init

  $ echo 'base' > base
  $ hg ci -Ambase
  adding base

  $ hg qnew -mmqbase mqbase

  $ hg qsave
  $ hg qrestore 2
  restoring status: hg patches saved state