Hi, Sorry for the delay in responding; I've been busy with non-git things... On Sat, Aug 12, 2023 at 12:19 AM Izzy via GitGitGadget <gitgitgadget@xxxxxxxxx> wrote: > > From: winglovet <winglovet@xxxxxxxxx> > > Add merge strategy option to produce more customizable merge result such > as automatically solve conflicts. > > Signed-off-by: winglovet <winglovet@xxxxxxxxx> Junio already flagged this line in your v1; you either need to correct it or respond to his comments about it. > --- > merge-tree: add -X strategy option > > Change-Id: I16be592262d13cebcff8726eb043f7ecdb313b76 > > Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1565%2FWingT%2Fmerge_tree_allow_strategy_option-v2 > Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1565/WingT/merge_tree_allow_strategy_option-v2 > Pull-Request: https://github.com/gitgitgadget/git/pull/1565 > > Range-diff vs v1: > > 1: b843caed596 ! 1: 7d53d08381e merge-tree: add -X strategy option > @@ builtin/merge-tree.c: int cmd_merge_tree(int argc, const char **argv, const char > /* Handle --stdin */ > if (o.use_stdin) { > struct strbuf buf = STRBUF_INIT; > + > + ## t/t4301-merge-tree-write-tree.sh ## > +@@ t/t4301-merge-tree-write-tree.sh: test_expect_success setup ' > + git branch side1 && > + git branch side2 && > + git branch side3 && > ++ git branch side4 && > + > + git checkout side1 && > + test_write_lines 1 2 3 4 5 6 >numbers && > +@@ t/t4301-merge-tree-write-tree.sh: test_expect_success setup ' > + test_tick && > + git commit -m rename-numbers && > + > ++ git checkout side4 && > ++ test_write_lines 0 1 2 3 4 5 >numbers && > ++ echo yo >greeting && > ++ git add numbers greeting && > ++ test_tick && > ++ git commit -m other-content-modifications && > ++ > + git switch --orphan unrelated && > + >something-else && > + git add something-else && > +@@ t/t4301-merge-tree-write-tree.sh: test_expect_success 'Content merge and a few conflicts' ' > + test_cmp expect actual > + ' > + > ++test_expect_success 'Auto resolve conflicts by "ours" stragety option' ' > ++ git checkout side1^0 && > ++ > ++ # make sure merge conflict exists > ++ test_must_fail git merge side4 && > ++ git merge --abort && > ++ > ++ git merge -X ours side4 && > ++ git rev-parse HEAD^{tree} > expected && > ++ > ++ git merge-tree -X ours side1 side4 > actual && > ++ > ++ test_cmp expected actual > ++' > ++ > + test_expect_success 'Barf on misspelled option, with exit code other than 0 or 1' ' > + # Mis-spell with single "s" instead of double "s" > + test_expect_code 129 git merge-tree --write-tree --mesages FOOBAR side1 side2 2>expect && > > > builtin/merge-tree.c | 24 ++++++++++++++++++++++++ > t/t4301-merge-tree-write-tree.sh | 23 +++++++++++++++++++++++ > 2 files changed, 47 insertions(+) > > diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c > index 0de42aecf4b..2ec6ec0d39a 100644 > --- a/builtin/merge-tree.c > +++ b/builtin/merge-tree.c > @@ -19,6 +19,8 @@ > #include "tree.h" > #include "config.h" > > +static const char **xopts; > +static size_t xopts_nr, xopts_alloc; I know we already have lots of globals, and I'm partially to blame since I also copied this style from elsewhere into this file, but it'd sure be nice to get rid of these needless globals rather than add more. But, certainly not a blocker.... > static int line_termination = '\n'; > > struct merge_list { > @@ -414,6 +416,7 @@ struct merge_tree_options { > int show_messages; > int name_only; > int use_stdin; > + struct merge_options merge_options; > }; Probably the best we can do now, but feels a little icky to me that parse_merge_opt() works on all of struct merge_options rather than having a dedicated struct for the particular options it can set. Made sense back in the merge-recursive.[ch] days, but it provides too many extra unrelated and unnecessary fields now. This isn't something you need to fix in this patch, though, just something else I'll keep in mind when I get back to working on removing merge-recursive.[ch]. > static int real_merge(struct merge_tree_options *o, > @@ -439,6 +442,8 @@ static int real_merge(struct merge_tree_options *o, > > init_merge_options(&opt, the_repository); > > + opt.recursive_variant = o->merge_options.recursive_variant; > + > opt.show_rename_progress = 0; > > opt.branch1 = branch1; > @@ -510,6 +515,17 @@ static int real_merge(struct merge_tree_options *o, > return !result.clean; /* result.clean < 0 handled above */ > } > > +static int option_parse_x(const struct option *opt, > + const char *arg, int unset) > +{ > + if (unset) > + return 0; > + > + ALLOC_GROW(xopts, xopts_nr + 1, xopts_alloc); > + xopts[xopts_nr++] = xstrdup(arg); > + return 0; > +} > + > int cmd_merge_tree(int argc, const char **argv, const char *prefix) > { > struct merge_tree_options o = { .show_messages = -1 }; > @@ -548,6 +564,10 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) > &merge_base, > N_("commit"), > N_("specify a merge-base for the merge")), > + OPT_CALLBACK('X', "strategy-option", &xopts, > + N_("option=value"), > + N_("option for selected merge strategy"), > + option_parse_x), > OPT_END() > }; > > @@ -556,6 +576,10 @@ int cmd_merge_tree(int argc, const char **argv, const char *prefix) > argc = parse_options(argc, argv, prefix, mt_options, > merge_tree_usage, PARSE_OPT_STOP_AT_NON_OPTION); > > + for (int x = 0; x < xopts_nr; x++) > + if (parse_merge_opt(&o.merge_options, xopts[x])) > + die(_("unknown strategy option: -X%s"), xopts[x]); > + > /* Handle --stdin */ > if (o.use_stdin) { > struct strbuf buf = STRBUF_INIT; > diff --git a/t/t4301-merge-tree-write-tree.sh b/t/t4301-merge-tree-write-tree.sh > index 250f721795b..2718817628c 100755 > --- a/t/t4301-merge-tree-write-tree.sh > +++ b/t/t4301-merge-tree-write-tree.sh > @@ -22,6 +22,7 @@ test_expect_success setup ' > git branch side1 && > git branch side2 && > git branch side3 && > + git branch side4 && > > git checkout side1 && > test_write_lines 1 2 3 4 5 6 >numbers && > @@ -46,6 +47,13 @@ test_expect_success setup ' > test_tick && > git commit -m rename-numbers && > > + git checkout side4 && > + test_write_lines 0 1 2 3 4 5 >numbers && > + echo yo >greeting && > + git add numbers greeting && > + test_tick && > + git commit -m other-content-modifications && > + > git switch --orphan unrelated && > >something-else && > git add something-else && > @@ -97,6 +105,21 @@ test_expect_success 'Content merge and a few conflicts' ' > test_cmp expect actual > ' > > +test_expect_success 'Auto resolve conflicts by "ours" stragety option' ' stragety -> strategy > + git checkout side1^0 && > + > + # make sure merge conflict exists > + test_must_fail git merge side4 && > + git merge --abort && > + > + git merge -X ours side4 && > + git rev-parse HEAD^{tree} > expected && Style: '>filename', not '> filename'. > + > + git merge-tree -X ours side1 side4 > actual && Same style issue with redirect. Also, why is the leading spacing inconsistent with the surrounding lines? > + > + test_cmp expected actual > +' > + > test_expect_success 'Barf on misspelled option, with exit code other than 0 or 1' ' > # Mis-spell with single "s" instead of double "s" > test_expect_code 129 git merge-tree --write-tree --mesages FOOBAR side1 side2 2>expect && I personally don't see the value in passing `-X ours` or `-X theirs` to merges. I've never really been a fan of either. Granted, I understand the value in making merge-tree support the same things that existing merges support, so I'm fine with supporting it, but I'd rather have a useful example for the testcase such as -Xignore-space-change or something (or maybe use it as an additional example?) Not a blocker on its own, but just a personal preference. Anyway, the general direction of the patch seems reasonable. Not everything I commented on needs to be fixed, as I noted, but there are a few small things to fix up.
