From: "Elijah Newren via GitGitGadget" <gitgitgadget@gmail.com> To: git@vger.kernel.org Cc: jonathantanmy@google.com, dstolee@microsoft.com, "Elijah Newren" <newren@gmail.com>, "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>, "Elijah Newren" <newren@gmail.com>, "Elijah Newren" <newren@gmail.com> Subject: [PATCH v3 11/20] merge-ort: add a preliminary simple process_entries() implementation Date: Sun, 13 Dec 2020 08:04:18 +0000 [thread overview] Message-ID: <8b001ae643a2aba66e3c16fbe33bf145a4662703.1607846667.git.gitgitgadget@gmail.com> (raw) In-Reply-To: <pull.923.v3.git.git.1607846667.gitgitgadget@gmail.com> From: Elijah Newren <newren@gmail.com> Add a process_entries() implementation that just loops over the paths and processes each one individually with an auxiliary process_entry() call. Add a basic process_entry() as well, which handles several cases but leaves a few of the more involved ones with die-not-implemented messages. Also, although process_entries() is supposed to create a tree, it does not yet have code to do so -- except in the special case of merging completely empty trees. Signed-off-by: Elijah Newren <newren@gmail.com> --- merge-ort.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 102 insertions(+), 1 deletion(-) diff --git a/merge-ort.c b/merge-ort.c index 868ac65091b..d78b6b0873d 100644 --- a/merge-ort.c +++ b/merge-ort.c @@ -492,10 +492,111 @@ static int detect_and_process_renames(struct merge_options *opt, return clean; } +/* Per entry merge function */ +static void process_entry(struct merge_options *opt, + const char *path, + struct conflict_info *ci) +{ + VERIFY_CI(ci); + assert(ci->filemask >= 0 && ci->filemask <= 7); + /* ci->match_mask == 7 was handled in collect_merge_info_callback() */ + assert(ci->match_mask == 0 || ci->match_mask == 3 || + ci->match_mask == 5 || ci->match_mask == 6); + + if (ci->df_conflict) { + die("Not yet implemented."); + } + + /* + * NOTE: Below there is a long switch-like if-elseif-elseif... block + * which the code goes through even for the df_conflict cases + * above. Well, it will once we don't die-not-implemented above. + */ + if (ci->match_mask) { + ci->merged.clean = 1; + if (ci->match_mask == 6) { + /* stages[1] == stages[2] */ + ci->merged.result.mode = ci->stages[1].mode; + oidcpy(&ci->merged.result.oid, &ci->stages[1].oid); + } else { + /* determine the mask of the side that didn't match */ + unsigned int othermask = 7 & ~ci->match_mask; + int side = (othermask == 4) ? 2 : 1; + + ci->merged.result.mode = ci->stages[side].mode; + ci->merged.is_null = !ci->merged.result.mode; + oidcpy(&ci->merged.result.oid, &ci->stages[side].oid); + + assert(othermask == 2 || othermask == 4); + assert(ci->merged.is_null == + (ci->filemask == ci->match_mask)); + } + } else if (ci->filemask >= 6 && + (S_IFMT & ci->stages[1].mode) != + (S_IFMT & ci->stages[2].mode)) { + /* + * Two different items from (file/submodule/symlink) + */ + die("Not yet implemented."); + } else if (ci->filemask >= 6) { + /* + * TODO: Needs a two-way or three-way content merge, but we're + * just being lazy and copying the version from HEAD and + * leaving it as conflicted. + */ + ci->merged.clean = 0; + ci->merged.result.mode = ci->stages[1].mode; + oidcpy(&ci->merged.result.oid, &ci->stages[1].oid); + } else if (ci->filemask == 3 || ci->filemask == 5) { + /* Modify/delete */ + die("Not yet implemented."); + } else if (ci->filemask == 2 || ci->filemask == 4) { + /* Added on one side */ + int side = (ci->filemask == 4) ? 2 : 1; + ci->merged.result.mode = ci->stages[side].mode; + oidcpy(&ci->merged.result.oid, &ci->stages[side].oid); + ci->merged.clean = !ci->df_conflict; + } else if (ci->filemask == 1) { + /* Deleted on both sides */ + ci->merged.is_null = 1; + ci->merged.result.mode = 0; + oidcpy(&ci->merged.result.oid, &null_oid); + ci->merged.clean = 1; + } + + /* + * If still conflicted, record it separately. This allows us to later + * iterate over just conflicted entries when updating the index instead + * of iterating over all entries. + */ + if (!ci->merged.clean) + strmap_put(&opt->priv->conflicted, path, ci); +} + static void process_entries(struct merge_options *opt, struct object_id *result_oid) { - die("Not yet implemented."); + struct hashmap_iter iter; + struct strmap_entry *e; + + if (strmap_empty(&opt->priv->paths)) { + oidcpy(result_oid, opt->repo->hash_algo->empty_tree); + return; + } + + strmap_for_each_entry(&opt->priv->paths, &iter, e) { + /* + * NOTE: mi may actually be a pointer to a conflict_info, but + * we have to check mi->clean first to see if it's safe to + * reassign to such a pointer type. + */ + struct merged_info *mi = e->value; + + if (!mi->clean) + process_entry(opt, e->key, e->value); + } + + die("Tree creation not yet implemented"); } void merge_switch_to_result(struct merge_options *opt, -- gitgitgadget
next prev parent reply other threads:[~2020-12-13 8:08 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-11-29 7:43 [PATCH 00/20] fundamentals of merge-ort implementation Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 01/20] merge-ort: setup basic internal data structures Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 02/20] merge-ort: add some high-level algorithm structure Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 03/20] merge-ort: port merge_start() from merge-recursive Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 04/20] merge-ort: use histogram diff Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 05/20] merge-ort: add an err() function similar to one from merge-recursive Elijah Newren via GitGitGadget 2020-11-29 10:23 ` Ævar Arnfjörð Bjarmason 2020-11-30 16:56 ` Elijah Newren 2020-11-29 10:26 ` Ævar Arnfjörð Bjarmason 2020-11-29 7:43 ` [PATCH 06/20] merge-ort: implement a very basic collect_merge_info() Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 08/20] merge-ort: compute a few more useful fields for collect_merge_info Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 09/20] merge-ort: record stage and auxiliary info for every path Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 10/20] merge-ort: avoid recursing into identical trees Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 11/20] merge-ort: add a preliminary simple process_entries() implementation Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 12/20] merge-ort: have process_entries operate in a defined order Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 13/20] merge-ort: step 1 of tree writing -- record basenames, modes, and oids Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 14/20] merge-ort: step 2 of tree writing -- function to create tree object Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 15/20] merge-ort: step 3 of tree writing -- handling subdirectories as we go Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 16/20] merge-ort: basic outline for merge_switch_to_result() Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 17/20] merge-ort: add implementation of checkout() Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 18/20] tree: enable cmp_cache_name_compare() to be used elsewhere Elijah Newren via GitGitGadget 2020-11-29 7:43 ` [PATCH 19/20] merge-ort: add implementation of record_conflicted_index_entries() Elijah Newren via GitGitGadget 2020-11-29 10:20 ` Ævar Arnfjörð Bjarmason 2020-11-29 7:43 ` [PATCH 20/20] merge-ort: free data structures in merge_finalize() Elijah Newren via GitGitGadget 2020-11-29 7:47 ` [PATCH 00/20] fundamentals of merge-ort implementation Elijah Newren 2020-12-04 20:47 ` [PATCH v2 " Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 01/20] merge-ort: setup basic internal data structures Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 02/20] merge-ort: add some high-level algorithm structure Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 03/20] merge-ort: port merge_start() from merge-recursive Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 04/20] merge-ort: use histogram diff Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 05/20] merge-ort: add an err() function similar to one from merge-recursive Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 06/20] merge-ort: implement a very basic collect_merge_info() Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 08/20] merge-ort: compute a few more useful fields for collect_merge_info Elijah Newren via GitGitGadget 2020-12-04 20:47 ` [PATCH v2 09/20] merge-ort: record stage and auxiliary info for every path Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 10/20] merge-ort: avoid recursing into identical trees Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 11/20] merge-ort: add a preliminary simple process_entries() implementation Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 12/20] merge-ort: have process_entries operate in a defined order Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 13/20] merge-ort: step 1 of tree writing -- record basenames, modes, and oids Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 14/20] merge-ort: step 2 of tree writing -- function to create tree object Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 15/20] merge-ort: step 3 of tree writing -- handling subdirectories as we go Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 16/20] merge-ort: basic outline for merge_switch_to_result() Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 17/20] merge-ort: add implementation of checkout() Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 18/20] tree: enable cmp_cache_name_compare() to be used elsewhere Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 19/20] merge-ort: add implementation of record_conflicted_index_entries() Elijah Newren via GitGitGadget 2020-12-04 20:48 ` [PATCH v2 20/20] merge-ort: free data structures in merge_finalize() Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 00/20] fundamentals of merge-ort implementation Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 01/20] merge-ort: setup basic internal data structures Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 02/20] merge-ort: add some high-level algorithm structure Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 03/20] merge-ort: port merge_start() from merge-recursive Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 04/20] merge-ort: use histogram diff Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 05/20] merge-ort: add an err() function similar to one from merge-recursive Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 06/20] merge-ort: implement a very basic collect_merge_info() Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 07/20] merge-ort: avoid repeating fill_tree_descriptor() on the same tree Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 08/20] merge-ort: compute a few more useful fields for collect_merge_info Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 09/20] merge-ort: record stage and auxiliary info for every path Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 10/20] merge-ort: avoid recursing into identical trees Elijah Newren via GitGitGadget 2020-12-13 8:04 ` Elijah Newren via GitGitGadget [this message] 2020-12-13 8:04 ` [PATCH v3 12/20] merge-ort: have process_entries operate in a defined order Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 13/20] merge-ort: step 1 of tree writing -- record basenames, modes, and oids Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 14/20] merge-ort: step 2 of tree writing -- function to create tree object Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 15/20] merge-ort: step 3 of tree writing -- handling subdirectories as we go Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 16/20] merge-ort: basic outline for merge_switch_to_result() Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 17/20] merge-ort: add implementation of checkout() Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 18/20] tree: enable cmp_cache_name_compare() to be used elsewhere Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 19/20] merge-ort: add implementation of record_conflicted_index_entries() Elijah Newren via GitGitGadget 2020-12-13 8:04 ` [PATCH v3 20/20] merge-ort: free data structures in merge_finalize() Elijah Newren via GitGitGadget 2020-12-14 14:24 ` [PATCH v3 00/20] fundamentals of merge-ort implementation Felipe Contreras 2020-12-14 16:24 ` Elijah Newren
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