chore(3p/git): Unvendor git and track patches instead r/2903

This was vendored a long time ago under the expectation that keeping
it in sync with cgit would be easier this way, but it has proven not
to be a big issue.

On the other hand, a vendored copy of git is an annoying maintenance
burden. It is much easier to rebase the single (dottime) patch that we
have.

This removes the vendored copy of git and instead passes the git
source code to cgit via `pkgs.srcOnly`, which includes the applied
patch so that cgit can continue rendering dottime.

Change-Id: If31f62dea7ce688fd1b9050204e9378019775f2b

1 files changed, 0 insertions, 551 deletions

diff --git a/third_party/git/refs/ref-cache.c b/third_party/git/refs/ref-cache.c
deleted file mode 100644
index b7052f72e2f4..000000000000
--- a/third_party/git/refs/ref-cache.c
+++ /dev/null
@@ -1,551 +0,0 @@
-#include "../cache.h"
-#include "../refs.h"
-#include "refs-internal.h"
-#include "ref-cache.h"
-#include "../iterator.h"
-
-void add_entry_to_dir(struct ref_dir *dir, struct ref_entry *entry)
-{
-	ALLOC_GROW(dir->entries, dir->nr + 1, dir->alloc);
-	dir->entries[dir->nr++] = entry;
-	/* optimize for the case that entries are added in order */
-	if (dir->nr == 1 ||
-	    (dir->nr == dir->sorted + 1 &&
-	     strcmp(dir->entries[dir->nr - 2]->name,
-		    dir->entries[dir->nr - 1]->name) < 0))
-		dir->sorted = dir->nr;
-}
-
-struct ref_dir *get_ref_dir(struct ref_entry *entry)
-{
-	struct ref_dir *dir;
-	assert(entry->flag & REF_DIR);
-	dir = &entry->u.subdir;
-	if (entry->flag & REF_INCOMPLETE) {
-		if (!dir->cache->fill_ref_dir)
-			BUG("incomplete ref_store without fill_ref_dir function");
-
-		dir->cache->fill_ref_dir(dir->cache->ref_store, dir, entry->name);
-		entry->flag &= ~REF_INCOMPLETE;
-	}
-	return dir;
-}
-
-struct ref_entry *create_ref_entry(const char *refname,
-				   const struct object_id *oid, int flag)
-{
-	struct ref_entry *ref;
-
-	FLEX_ALLOC_STR(ref, name, refname);
-	oidcpy(&ref->u.value.oid, oid);
-	ref->flag = flag;
-	return ref;
-}
-
-struct ref_cache *create_ref_cache(struct ref_store *refs,
-				   fill_ref_dir_fn *fill_ref_dir)
-{
-	struct ref_cache *ret = xcalloc(1, sizeof(*ret));
-
-	ret->ref_store = refs;
-	ret->fill_ref_dir = fill_ref_dir;
-	ret->root = create_dir_entry(ret, "", 0, 1);
-	return ret;
-}
-
-static void clear_ref_dir(struct ref_dir *dir);
-
-static void free_ref_entry(struct ref_entry *entry)
-{
-	if (entry->flag & REF_DIR) {
-		/*
-		 * Do not use get_ref_dir() here, as that might
-		 * trigger the reading of loose refs.
-		 */
-		clear_ref_dir(&entry->u.subdir);
-	}
-	free(entry);
-}
-
-void free_ref_cache(struct ref_cache *cache)
-{
-	free_ref_entry(cache->root);
-	free(cache);
-}
-
-/*
- * Clear and free all entries in dir, recursively.
- */
-static void clear_ref_dir(struct ref_dir *dir)
-{
-	int i;
-	for (i = 0; i < dir->nr; i++)
-		free_ref_entry(dir->entries[i]);
-	FREE_AND_NULL(dir->entries);
-	dir->sorted = dir->nr = dir->alloc = 0;
-}
-
-struct ref_entry *create_dir_entry(struct ref_cache *cache,
-				   const char *dirname, size_t len,
-				   int incomplete)
-{
-	struct ref_entry *direntry;
-
-	FLEX_ALLOC_MEM(direntry, name, dirname, len);
-	direntry->u.subdir.cache = cache;
-	direntry->flag = REF_DIR | (incomplete ? REF_INCOMPLETE : 0);
-	return direntry;
-}
-
-static int ref_entry_cmp(const void *a, const void *b)
-{
-	struct ref_entry *one = *(struct ref_entry **)a;
-	struct ref_entry *two = *(struct ref_entry **)b;
-	return strcmp(one->name, two->name);
-}
-
-static void sort_ref_dir(struct ref_dir *dir);
-
-struct string_slice {
-	size_t len;
-	const char *str;
-};
-
-static int ref_entry_cmp_sslice(const void *key_, const void *ent_)
-{
-	const struct string_slice *key = key_;
-	const struct ref_entry *ent = *(const struct ref_entry * const *)ent_;
-	int cmp = strncmp(key->str, ent->name, key->len);
-	if (cmp)
-		return cmp;
-	return '\0' - (unsigned char)ent->name[key->len];
-}
-
-int search_ref_dir(struct ref_dir *dir, const char *refname, size_t len)
-{
-	struct ref_entry **r;
-	struct string_slice key;
-
-	if (refname == NULL || !dir->nr)
-		return -1;
-
-	sort_ref_dir(dir);
-	key.len = len;
-	key.str = refname;
-	r = bsearch(&key, dir->entries, dir->nr, sizeof(*dir->entries),
-		    ref_entry_cmp_sslice);
-
-	if (r == NULL)
-		return -1;
-
-	return r - dir->entries;
-}
-
-/*
- * Search for a directory entry directly within dir (without
- * recursing).  Sort dir if necessary.  subdirname must be a directory
- * name (i.e., end in '/').  If mkdir is set, then create the
- * directory if it is missing; otherwise, return NULL if the desired
- * directory cannot be found.  dir must already be complete.
- */
-static struct ref_dir *search_for_subdir(struct ref_dir *dir,
-					 const char *subdirname, size_t len,
-					 int mkdir)
-{
-	int entry_index = search_ref_dir(dir, subdirname, len);
-	struct ref_entry *entry;
-	if (entry_index == -1) {
-		if (!mkdir)
-			return NULL;
-		/*
-		 * Since dir is complete, the absence of a subdir
-		 * means that the subdir really doesn't exist;
-		 * therefore, create an empty record for it but mark
-		 * the record complete.
-		 */
-		entry = create_dir_entry(dir->cache, subdirname, len, 0);
-		add_entry_to_dir(dir, entry);
-	} else {
-		entry = dir->entries[entry_index];
-	}
-	return get_ref_dir(entry);
-}
-
-/*
- * If refname is a reference name, find the ref_dir within the dir
- * tree that should hold refname. If refname is a directory name
- * (i.e., it ends in '/'), then return that ref_dir itself. dir must
- * represent the top-level directory and must already be complete.
- * Sort ref_dirs and recurse into subdirectories as necessary. If
- * mkdir is set, then create any missing directories; otherwise,
- * return NULL if the desired directory cannot be found.
- */
-static struct ref_dir *find_containing_dir(struct ref_dir *dir,
-					   const char *refname, int mkdir)
-{
-	const char *slash;
-	for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) {
-		size_t dirnamelen = slash - refname + 1;
-		struct ref_dir *subdir;
-		subdir = search_for_subdir(dir, refname, dirnamelen, mkdir);
-		if (!subdir) {
-			dir = NULL;
-			break;
-		}
-		dir = subdir;
-	}
-
-	return dir;
-}
-
-struct ref_entry *find_ref_entry(struct ref_dir *dir, const char *refname)
-{
-	int entry_index;
-	struct ref_entry *entry;
-	dir = find_containing_dir(dir, refname, 0);
-	if (!dir)
-		return NULL;
-	entry_index = search_ref_dir(dir, refname, strlen(refname));
-	if (entry_index == -1)
-		return NULL;
-	entry = dir->entries[entry_index];
-	return (entry->flag & REF_DIR) ? NULL : entry;
-}
-
-int remove_entry_from_dir(struct ref_dir *dir, const char *refname)
-{
-	int refname_len = strlen(refname);
-	int entry_index;
-	struct ref_entry *entry;
-	int is_dir = refname[refname_len - 1] == '/';
-	if (is_dir) {
-		/*
-		 * refname represents a reference directory.  Remove
-		 * the trailing slash; otherwise we will get the
-		 * directory *representing* refname rather than the
-		 * one *containing* it.
-		 */
-		char *dirname = xmemdupz(refname, refname_len - 1);
-		dir = find_containing_dir(dir, dirname, 0);
-		free(dirname);
-	} else {
-		dir = find_containing_dir(dir, refname, 0);
-	}
-	if (!dir)
-		return -1;
-	entry_index = search_ref_dir(dir, refname, refname_len);
-	if (entry_index == -1)
-		return -1;
-	entry = dir->entries[entry_index];
-
-	MOVE_ARRAY(&dir->entries[entry_index],
-		   &dir->entries[entry_index + 1], dir->nr - entry_index - 1);
-	dir->nr--;
-	if (dir->sorted > entry_index)
-		dir->sorted--;
-	free_ref_entry(entry);
-	return dir->nr;
-}
-
-int add_ref_entry(struct ref_dir *dir, struct ref_entry *ref)
-{
-	dir = find_containing_dir(dir, ref->name, 1);
-	if (!dir)
-		return -1;
-	add_entry_to_dir(dir, ref);
-	return 0;
-}
-
-/*
- * Emit a warning and return true iff ref1 and ref2 have the same name
- * and the same oid. Die if they have the same name but different
- * oids.
- */
-static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2)
-{
-	if (strcmp(ref1->name, ref2->name))
-		return 0;
-
-	/* Duplicate name; make sure that they don't conflict: */
-
-	if ((ref1->flag & REF_DIR) || (ref2->flag & REF_DIR))
-		/* This is impossible by construction */
-		die("Reference directory conflict: %s", ref1->name);
-
-	if (!oideq(&ref1->u.value.oid, &ref2->u.value.oid))
-		die("Duplicated ref, and SHA1s don't match: %s", ref1->name);
-
-	warning("Duplicated ref: %s", ref1->name);
-	return 1;
-}
-
-/*
- * Sort the entries in dir non-recursively (if they are not already
- * sorted) and remove any duplicate entries.
- */
-static void sort_ref_dir(struct ref_dir *dir)
-{
-	int i, j;
-	struct ref_entry *last = NULL;
-
-	/*
-	 * This check also prevents passing a zero-length array to qsort(),
-	 * which is a problem on some platforms.
-	 */
-	if (dir->sorted == dir->nr)
-		return;
-
-	QSORT(dir->entries, dir->nr, ref_entry_cmp);
-
-	/* Remove any duplicates: */
-	for (i = 0, j = 0; j < dir->nr; j++) {
-		struct ref_entry *entry = dir->entries[j];
-		if (last && is_dup_ref(last, entry))
-			free_ref_entry(entry);
-		else
-			last = dir->entries[i++] = entry;
-	}
-	dir->sorted = dir->nr = i;
-}
-
-enum prefix_state {
-	/* All refs within the directory would match prefix: */
-	PREFIX_CONTAINS_DIR,
-
-	/* Some, but not all, refs within the directory might match prefix: */
-	PREFIX_WITHIN_DIR,
-
-	/* No refs within the directory could possibly match prefix: */
-	PREFIX_EXCLUDES_DIR
-};
-
-/*
- * Return a `prefix_state` constant describing the relationship
- * between the directory with the specified `dirname` and `prefix`.
- */
-static enum prefix_state overlaps_prefix(const char *dirname,
-					 const char *prefix)
-{
-	while (*prefix && *dirname == *prefix) {
-		dirname++;
-		prefix++;
-	}
-	if (!*prefix)
-		return PREFIX_CONTAINS_DIR;
-	else if (!*dirname)
-		return PREFIX_WITHIN_DIR;
-	else
-		return PREFIX_EXCLUDES_DIR;
-}
-
-/*
- * Load all of the refs from `dir` (recursively) that could possibly
- * contain references matching `prefix` into our in-memory cache. If
- * `prefix` is NULL, prime unconditionally.
- */
-static void prime_ref_dir(struct ref_dir *dir, const char *prefix)
-{
-	/*
-	 * The hard work of loading loose refs is done by get_ref_dir(), so we
-	 * just need to recurse through all of the sub-directories. We do not
-	 * even need to care about sorting, as traversal order does not matter
-	 * to us.
-	 */
-	int i;
-	for (i = 0; i < dir->nr; i++) {
-		struct ref_entry *entry = dir->entries[i];
-		if (!(entry->flag & REF_DIR)) {
-			/* Not a directory; no need to recurse. */
-		} else if (!prefix) {
-			/* Recurse in any case: */
-			prime_ref_dir(get_ref_dir(entry), NULL);
-		} else {
-			switch (overlaps_prefix(entry->name, prefix)) {
-			case PREFIX_CONTAINS_DIR:
-				/*
-				 * Recurse, and from here down we
-				 * don't have to check the prefix
-				 * anymore:
-				 */
-				prime_ref_dir(get_ref_dir(entry), NULL);
-				break;
-			case PREFIX_WITHIN_DIR:
-				prime_ref_dir(get_ref_dir(entry), prefix);
-				break;
-			case PREFIX_EXCLUDES_DIR:
-				/* No need to prime this directory. */
-				break;
-			}
-		}
-	}
-}
-
-/*
- * A level in the reference hierarchy that is currently being iterated
- * through.
- */
-struct cache_ref_iterator_level {
-	/*
-	 * The ref_dir being iterated over at this level. The ref_dir
-	 * is sorted before being stored here.
-	 */
-	struct ref_dir *dir;
-
-	enum prefix_state prefix_state;
-
-	/*
-	 * The index of the current entry within dir (which might
-	 * itself be a directory). If index == -1, then the iteration
-	 * hasn't yet begun. If index == dir->nr, then the iteration
-	 * through this level is over.
-	 */
-	int index;
-};
-
-/*
- * Represent an iteration through a ref_dir in the memory cache. The
- * iteration recurses through subdirectories.
- */
-struct cache_ref_iterator {
-	struct ref_iterator base;
-
-	/*
-	 * The number of levels currently on the stack. This is always
-	 * at least 1, because when it becomes zero the iteration is
-	 * ended and this struct is freed.
-	 */
-	size_t levels_nr;
-
-	/* The number of levels that have been allocated on the stack */
-	size_t levels_alloc;
-
-	/*
-	 * Only include references with this prefix in the iteration.
-	 * The prefix is matched textually, without regard for path
-	 * component boundaries.
-	 */
-	const char *prefix;
-
-	/*
-	 * A stack of levels. levels[0] is the uppermost level that is
-	 * being iterated over in this iteration. (This is not
-	 * necessary the top level in the references hierarchy. If we
-	 * are iterating through a subtree, then levels[0] will hold
-	 * the ref_dir for that subtree, and subsequent levels will go
-	 * on from there.)
-	 */
-	struct cache_ref_iterator_level *levels;
-};
-
-static int cache_ref_iterator_advance(struct ref_iterator *ref_iterator)
-{
-	struct cache_ref_iterator *iter =
-		(struct cache_ref_iterator *)ref_iterator;
-
-	while (1) {
-		struct cache_ref_iterator_level *level =
-			&iter->levels[iter->levels_nr - 1];
-		struct ref_dir *dir = level->dir;
-		struct ref_entry *entry;
-		enum prefix_state entry_prefix_state;
-
-		if (level->index == -1)
-			sort_ref_dir(dir);
-
-		if (++level->index == level->dir->nr) {
-			/* This level is exhausted; pop up a level */
-			if (--iter->levels_nr == 0)
-				return ref_iterator_abort(ref_iterator);
-
-			continue;
-		}
-
-		entry = dir->entries[level->index];
-
-		if (level->prefix_state == PREFIX_WITHIN_DIR) {
-			entry_prefix_state = overlaps_prefix(entry->name, iter->prefix);
-			if (entry_prefix_state == PREFIX_EXCLUDES_DIR)
-				continue;
-		} else {
-			entry_prefix_state = level->prefix_state;
-		}
-
-		if (entry->flag & REF_DIR) {
-			/* push down a level */
-			ALLOC_GROW(iter->levels, iter->levels_nr + 1,
-				   iter->levels_alloc);
-
-			level = &iter->levels[iter->levels_nr++];
-			level->dir = get_ref_dir(entry);
-			level->prefix_state = entry_prefix_state;
-			level->index = -1;
-		} else {
-			iter->base.refname = entry->name;
-			iter->base.oid = &entry->u.value.oid;
-			iter->base.flags = entry->flag;
-			return ITER_OK;
-		}
-	}
-}
-
-static int cache_ref_iterator_peel(struct ref_iterator *ref_iterator,
-				   struct object_id *peeled)
-{
-	return peel_object(ref_iterator->oid, peeled);
-}
-
-static int cache_ref_iterator_abort(struct ref_iterator *ref_iterator)
-{
-	struct cache_ref_iterator *iter =
-		(struct cache_ref_iterator *)ref_iterator;
-
-	free((char *)iter->prefix);
-	free(iter->levels);
-	base_ref_iterator_free(ref_iterator);
-	return ITER_DONE;
-}
-
-static struct ref_iterator_vtable cache_ref_iterator_vtable = {
-	cache_ref_iterator_advance,
-	cache_ref_iterator_peel,
-	cache_ref_iterator_abort
-};
-
-struct ref_iterator *cache_ref_iterator_begin(struct ref_cache *cache,
-					      const char *prefix,
-					      int prime_dir)
-{
-	struct ref_dir *dir;
-	struct cache_ref_iterator *iter;
-	struct ref_iterator *ref_iterator;
-	struct cache_ref_iterator_level *level;
-
-	dir = get_ref_dir(cache->root);
-	if (prefix && *prefix)
-		dir = find_containing_dir(dir, prefix, 0);
-	if (!dir)
-		/* There's nothing to iterate over. */
-		return empty_ref_iterator_begin();
-
-	if (prime_dir)
-		prime_ref_dir(dir, prefix);
-
-	iter = xcalloc(1, sizeof(*iter));
-	ref_iterator = &iter->base;
-	base_ref_iterator_init(ref_iterator, &cache_ref_iterator_vtable, 1);
-	ALLOC_GROW(iter->levels, 10, iter->levels_alloc);
-
-	iter->levels_nr = 1;
-	level = &iter->levels[0];
-	level->index = -1;
-	level->dir = dir;
-
-	if (prefix && *prefix) {
-		iter->prefix = xstrdup(prefix);
-		level->prefix_state = PREFIX_WITHIN_DIR;
-	} else {
-		level->prefix_state = PREFIX_CONTAINS_DIR;
-	}
-
-	return ref_iterator;
-}