[PATCH 0/9] Handle pull option precedence

From: "Elijah Newren via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: "Alex Henrie" <alexhenrie24@gmail.com>,
	"Son Luong Ngoc" <sluongng@gmail.com>,
	"Matthias Baumgarten" <matthias.baumgarten@aixigo.com>,
	"Eric Sunshine" <sunshine@sunshineco.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Elijah Newren" <newren@gmail.com>
Subject: [PATCH 0/9] Handle pull option precedence
Date: Sat, 17 Jul 2021 15:41:38 +0000	[thread overview]
Message-ID: <pull.1049.git.git.1626536507.gitgitgadget@gmail.com> (raw)

Based on a recent list of rules for flag/option precedence for git-pull[1]
from Junio (particularly focusing on rebase vs. merge vs. fast-forward),
here's an attempt to implement and document it. Given multiple recent
surprises from users about some of these behaviors[2][3] and a coworker just
yesterday expressing some puzzlement with git-pull and rebase vs. merge, it
seems like a good time to address some of these issues.

Since the handling of conflicting options was holding up two of Alex's
patches[4][5], and his patches fix some of the tests, I also include those
two patches in my series, with a few small changes to the first (so I've
kept him as author) and more substantial changes to the second (so I've
given him an Initial-patch-by attribution).

Quick overview:

 * Patches 1-2: new testcases (see the commit messages for the rules)
 * Patch 3: Alex's recent patch (abort if --ff-only but can't do so)
 * Patches 4-6: fix the precedence parts Alex didn't cover
 * Patch 7: Alex's other patch, abort if rebase vs. merge not specified
 * Patch 8: Compatibility of git-pull with merge-options.txt (think
   rebasing)
 * Patch 9: Fix multiple heads handling too

[1] https://lore.kernel.org/git/xmqqwnpqot4m.fsf@gitster.g/ [2]
https://lore.kernel.org/git/CAL3xRKdOyVWvcLXK7zoXtFPiHBjgL24zi5hhg+3yjowwSUPgmg@mail.gmail.com/
[3]
https://lore.kernel.org/git/c62933fb-96b2-99f5-7169-372f486f6e39@aixigo.com/
[4]
https://lore.kernel.org/git/20210711012604.947321-1-alexhenrie24@gmail.com/
[5]
https://lore.kernel.org/git/20210627000855.530985-1-alexhenrie24@gmail.com/

Alex Henrie (1):
  pull: abort if --ff-only is given and fast-forwarding is impossible

Elijah Newren (8):
  t7601: add relative precedence tests for merge and rebase
    flags/options
  t7601: add tests of interactions with multiple merge heads and config
  pull: since --ff-only overrides, handle it first
  pull: ensure --rebase overrides ability to ff
  pull: make --rebase and --no-rebase override pull.ff=only
  pull: abort by default when fast-forwarding is not possible
  pull: update docs & code for option compatibility with rebasing
  pull: fix handling of multiple heads

 Documentation/git-pull.txt      |  22 ++--
 Documentation/merge-options.txt |  25 ++++
 advice.c                        |   5 +
 advice.h                        |   1 +
 builtin/merge.c                 |   2 +-
 builtin/pull.c                  |  55 ++++++---
 t/t4013-diff-various.sh         |   2 +-
 t/t5520-pull.sh                 |  26 ++--
 t/t5521-pull-options.sh         |   4 +-
 t/t5524-pull-msg.sh             |   4 +-
 t/t5553-set-upstream.sh         |  14 +--
 t/t5604-clone-reference.sh      |   4 +-
 t/t6402-merge-rename.sh         |  18 +--
 t/t6409-merge-subtree.sh        |   6 +-
 t/t6417-merge-ours-theirs.sh    |  10 +-
 t/t7601-merge-pull-config.sh    | 212 +++++++++++++++++++++++++++++---
 t/t7603-merge-reduce-heads.sh   |   2 +-
 17 files changed, 321 insertions(+), 91 deletions(-)

base-commit: 75ae10bc75336db031ee58d13c5037b929235912
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1049%2Fnewren%2Fhandle-pull-option-precedence-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1049/newren/handle-pull-option-precedence-v1
Pull-Request: https://github.com/git/git/pull/1049
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