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merge-recursive: honor diff.algorithm

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The documentation claims that "recursive defaults to the diff.algorithm
config setting", but this is currently not the case. This fixes it,
ensuring that diff.algorithm is used when -Xdiff-algorithm is not
supplied. This affects the following porcelain commands: "merge",
"rebase", "cherry-pick", "pull", "stash", "log", "am" and "checkout".
It also affects the "merge-tree" ancillary interrogator.

This change refactors the initialization of merge options to introduce
two functions, "init_merge_ui_options" and "init_merge_basic_options"
instead of just one "init_merge_options". This design follows the
approach used in diff.c, providing initialization methods for
porcelain and plumbing commands respectively. Thanks to that, the
"replay" and "merge-recursive" plumbing commands remain unaffected by
diff.algorithm.

Signed-off-by: Antonin Delpeuch <antonin@delpeuch.eu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Antonin Delpeuch
2024-07-13 16:51:46 +00:00
committed by Junio C Hamano
parent 557ae147e6
commit 9c93ba4d0a
15 changed files with 150 additions and 15 deletions
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builtin/am.c
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@ -1630,7 +1630,7 @@ static int fall_back_threeway(const struct am_state *state, const char *index_pa
* changes.
*/
init_merge_options(&o, the_repository);
init_ui_merge_options(&o, the_repository);
o.branch1 = "HEAD";
their_tree_name = xstrfmt("%.*s", linelen(state->msg), state->msg);