#!/bin/bash

### Start a git bisection, and prune the branches that are the result of
### merging external trees into the Emacs repository.

## Copyright (C) 2022 Free Software Foundation, Inc.

## This file is part of GNU Emacs.

## GNU Emacs is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.

## GNU Emacs is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.

## You should have received a copy of the GNU General Public License
## along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

### Commentary:

## Marking the last commits of external tree merges as "good" ensures
## that all the commits between the external tree root and the merge
## (excluding the merge-commit itself) are regarded as "good", so "git
## bisect" will never descend into these branches, which only have the
## files of the external tree, and in which Emacs can therefore not be
## built.  The last commit is the parent of the merge commit in the
## external tree, that is, the parent of the merge commit that is not
## on master.

### Code:

git bisect start

# Prune commits 1e5b753bf4..806734c1b1 introduced by 0186faf2a1
# (Eglot merge on Oct 20 2022)
git bisect good 806734c1b1f433de43d59d9a5e3a1e89d64315f6

# Prune commits 31ea42e15e..a6cbfdd8f1 introduced by 4a1e9d61b5
# (use-package merge on Nov 30 2022)
git bisect good 4a1e9d61b57c36255752437a2668e037e79fe870