Subject: [PATCH 13/20] merge-ort: step 1 of tree writing -- record basenames, modes, and oids

From: Elijah Newren <[email-masked]>
Date: Thu, 29 Oct 2020 20:41:24 -0700

As a step towards transforming the processed path->conflict_info entries
into an actual tree object, start recording basenames, modes, and oids
in a dir_metadata structure.  Subsequent commits will make use of this
to actually write a tree.

Signed-off-by: Elijah Newren <[email-masked]>
---
 merge-ort.c | 35 ++++++++++++++++++++++++++++++++---
 1 file changed, 32 insertions(+), 3 deletions(-)

diff --git a/merge-ort.c b/merge-ort.c
index 31c16edd3d..17159df5db 100644
--- a/merge-ort.c
+++ b/merge-ort.c
@@ -351,10 +351,31 @@ static int string_list_df_name_compare(const char *one, const char *two)
 	return onelen - twolen;
 }
 
+struct directory_versions {
+	struct string_list versions;
+};
+
+static void record_entry_for_tree(struct directory_versions *dir_metadata,
+				  const char *path,
+				  struct conflict_info *ci)
+{
+	const char *basename;
+
+	if (ci->merged.is_null)
+		/* nothing to record */
+		return;
+
+	basename = path + ci->merged.basename_offset;
+	assert(strchr(basename, '/') == NULL);
+	string_list_append(&dir_metadata->versions,
+			   basename)->util = &ci->merged.result;
+}
+
 /* Per entry merge function */
 static void process_entry(struct merge_options *opt,
 			  const char *path,
-			  struct conflict_info *ci)
+			  struct conflict_info *ci,
+			  struct directory_versions *dir_metadata)
 {
 	assert(!ci->merged.clean);
 	assert(ci->filemask >= 0 && ci->filemask <= 7);
@@ -434,6 +455,7 @@ static void process_entry(struct merge_options *opt,
 	 */
 	if (!ci->merged.clean)
 		strmap_put(&opt->priv->unmerged, path, ci);
+	record_entry_for_tree(dir_metadata, path, ci);
 }
 
 static void process_entries(struct merge_options *opt,
@@ -443,6 +465,7 @@ static void process_entries(struct merge_options *opt,
 	struct strmap_entry *e;
 	struct string_list plist = STRING_LIST_INIT_NODUP;
 	struct string_list_item *entry;
+	struct directory_versions dir_metadata;
 
 	if (strmap_empty(&opt->priv->paths)) {
 		oidcpy(result_oid, opt->repo->hash_algo->empty_tree);
@@ -459,6 +482,9 @@ static void process_entries(struct merge_options *opt,
 	plist.cmp = string_list_df_name_compare;
 	string_list_sort(&plist);
 
+	/* other setup */
+	string_list_init(&dir_metadata.versions, 0);
+
 	/*
 	 * Iterate over the items in reverse order, so we can handle paths
 	 * below a directory before needing to handle the directory itself.
@@ -471,11 +497,14 @@ static void process_entries(struct merge_options *opt,
 		 */
 		struct conflict_info *ci = entry->util;
 
-		if (!ci->merged.clean)
-			process_entry(opt, path, ci);
+		if (ci->merged.clean)
+			record_entry_for_tree(&dir_metadata, path, ci);
+		else
+			process_entry(opt, path, ci, &dir_metadata);
 	}
 
 	string_list_clear(&plist, 0);
+	string_list_clear(&dir_metadata.versions, 0);
 	die("Tree creation not yet implemented");
 }
 
-- 
2.29.1.56.ga287c268e6.dirty