Revert "Merge branch 'js/notes'"

This reverts commit 7b75b331f6, reversing
changes made to 5d680a67d7.

notes.c

@@ -1,160 +0,0 @@
-#include "cache.h"
-#include "commit.h"
-#include "notes.h"
-#include "refs.h"
-#include "utf8.h"
-#include "strbuf.h"
-#include "tree-walk.h"
-
-struct entry {
-	unsigned char commit_sha1[20];
-	unsigned char notes_sha1[20];
-};
-
-struct hash_map {
-	struct entry *entries;
-	off_t count, size;
-};
-
-static int initialized;
-static struct hash_map hash_map;
-
-static int hash_index(struct hash_map *map, const unsigned char *sha1)
-{
-	int i = ((*(unsigned int *)sha1) % map->size);
-
-	for (;;) {
-		unsigned char *current = map->entries[i].commit_sha1;
-
-		if (!hashcmp(sha1, current))
-			return i;
-
-		if (is_null_sha1(current))
-			return -1 - i;
-
-		if (++i == map->size)
-			i = 0;
-	}
-}
-
-static void add_entry(const unsigned char *commit_sha1,
-		const unsigned char *notes_sha1)
-{
-	int index;
-
-	if (hash_map.count + 1 > hash_map.size >> 1) {
-		int i, old_size = hash_map.size;
-		struct entry *old = hash_map.entries;
-
-		hash_map.size = old_size ? old_size << 1 : 64;
-		hash_map.entries = (struct entry *)
-			xcalloc(sizeof(struct entry), hash_map.size);
-
-		for (i = 0; i < old_size; i++)
-			if (!is_null_sha1(old[i].commit_sha1)) {
-				index = -1 - hash_index(&hash_map,
-						old[i].commit_sha1);
-				memcpy(hash_map.entries + index, old + i,
-					sizeof(struct entry));
-			}
-		free(old);
-	}
-
-	index = hash_index(&hash_map, commit_sha1);
-	if (index < 0) {
-		index = -1 - index;
-		hash_map.count++;
-	}
-
-	hashcpy(hash_map.entries[index].commit_sha1, commit_sha1);
-	hashcpy(hash_map.entries[index].notes_sha1, notes_sha1);
-}
-
-static void initialize_hash_map(const char *notes_ref_name)
-{
-	unsigned char sha1[20], commit_sha1[20];
-	unsigned mode;
-	struct tree_desc desc;
-	struct name_entry entry;
-	void *buf;
-
-	if (!notes_ref_name || read_ref(notes_ref_name, commit_sha1) ||
-	    get_tree_entry(commit_sha1, "", sha1, &mode))
-		return;
-
-	buf = fill_tree_descriptor(&desc, sha1);
-	if (!buf)
-		die("Could not read %s for notes-index", sha1_to_hex(sha1));
-
-	while (tree_entry(&desc, &entry))
-		if (!get_sha1(entry.path, commit_sha1))
-			add_entry(commit_sha1, entry.sha1);
-	free(buf);
-}
-
-static unsigned char *lookup_notes(const unsigned char *commit_sha1)
-{
-	int index;
-
-	if (!hash_map.size)
-		return NULL;
-
-	index = hash_index(&hash_map, commit_sha1);
-	if (index < 0)
-		return NULL;
-	return hash_map.entries[index].notes_sha1;
-}
-
-void get_commit_notes(const struct commit *commit, struct strbuf *sb,
-		const char *output_encoding)
-{
-	static const char *utf8 = "utf-8";
-	unsigned char *sha1;
-	char *msg, *msg_p;
-	unsigned long linelen, msglen;
-	enum object_type type;
-
-	if (!initialized) {
-		const char *env = getenv(GIT_NOTES_REF_ENVIRONMENT);
-		if (env)
-			notes_ref_name = getenv(GIT_NOTES_REF_ENVIRONMENT);
-		else if (!notes_ref_name)
-			notes_ref_name = GIT_NOTES_DEFAULT_REF;
-		initialize_hash_map(notes_ref_name);
-		initialized = 1;
-	}
-
-	sha1 = lookup_notes(commit->object.sha1);
-	if (!sha1)
-		return;
-
-	if (!(msg = read_sha1_file(sha1, &type, &msglen)) || !msglen ||
-			type != OBJ_BLOB)
-		return;
-
-	if (output_encoding && *output_encoding &&
-			strcmp(utf8, output_encoding)) {
-		char *reencoded = reencode_string(msg, output_encoding, utf8);
-		if (reencoded) {
-			free(msg);
-			msg = reencoded;
-			msglen = strlen(msg);
-		}
-	}
-
-	/* we will end the annotation by a newline anyway */
-	if (msglen && msg[msglen - 1] == '\n')
-		msglen--;
-
-	strbuf_addstr(sb, "\nNotes:\n");
-
-	for (msg_p = msg; msg_p < msg + msglen; msg_p += linelen + 1) {
-		linelen = strchrnul(msg_p, '\n') - msg_p;
-
-		strbuf_addstr(sb, "    ");
-		strbuf_add(sb, msg_p, linelen);
-		strbuf_addch(sb, '\n');
-	}
-
-	free(msg);
-}