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authorJunio C Hamano <gitster@pobox.com>2008-05-11 01:14:28 (GMT)
committerJunio C Hamano <gitster@pobox.com>2008-05-11 01:14:28 (GMT)
commit380a7426794dcad369dd48519cd01d6e0246cde5 (patch)
treea6671d54dfa9c41094f541ef5377ae53d04e842c /read-cache.c
parent1f8115b113def8ee03701aa87b26c5e8b7c94434 (diff)
parent1102952b45dde09d73445aa2284bcb592362fa23 (diff)
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Merge branch 'lt/case-insensitive'
* lt/case-insensitive: Make git-add behave more sensibly in a case-insensitive environment When adding files to the index, add support for case-independent matches Make unpack-tree update removed files before any updated files Make branch merging aware of underlying case-insensitive filsystems Add 'core.ignorecase' option Make hash_name_lookup able to do case-independent lookups Make "index_name_exists()" return the cache_entry it found Move name hashing functions into a file of its own Make unpack_trees_options bit flags actual bitfields
Diffstat (limited to 'read-cache.c')
-rw-r--r--read-cache.c114
1 files changed, 44 insertions, 70 deletions
diff --git a/read-cache.c b/read-cache.c
index c3692f4..3b20a14 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -23,80 +23,21 @@
struct index_state the_index;
-static unsigned int hash_name(const char *name, int namelen)
-{
- unsigned int hash = 0x123;
-
- do {
- unsigned char c = *name++;
- hash = hash*101 + c;
- } while (--namelen);
- return hash;
-}
-
-static void hash_index_entry(struct index_state *istate, struct cache_entry *ce)
-{
- void **pos;
- unsigned int hash;
-
- if (ce->ce_flags & CE_HASHED)
- return;
- ce->ce_flags |= CE_HASHED;
- ce->next = NULL;
- hash = hash_name(ce->name, ce_namelen(ce));
- pos = insert_hash(hash, ce, &istate->name_hash);
- if (pos) {
- ce->next = *pos;
- *pos = ce;
- }
-}
-
-static void lazy_init_name_hash(struct index_state *istate)
-{
- int nr;
-
- if (istate->name_hash_initialized)
- return;
- for (nr = 0; nr < istate->cache_nr; nr++)
- hash_index_entry(istate, istate->cache[nr]);
- istate->name_hash_initialized = 1;
-}
-
static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce)
{
- ce->ce_flags &= ~CE_UNHASHED;
istate->cache[nr] = ce;
- if (istate->name_hash_initialized)
- hash_index_entry(istate, ce);
+ add_name_hash(istate, ce);
}
static void replace_index_entry(struct index_state *istate, int nr, struct cache_entry *ce)
{
struct cache_entry *old = istate->cache[nr];
- remove_index_entry(old);
+ remove_name_hash(old);
set_index_entry(istate, nr, ce);
istate->cache_changed = 1;
}
-int index_name_exists(struct index_state *istate, const char *name, int namelen)
-{
- unsigned int hash = hash_name(name, namelen);
- struct cache_entry *ce;
-
- lazy_init_name_hash(istate);
- ce = lookup_hash(hash, &istate->name_hash);
-
- while (ce) {
- if (!(ce->ce_flags & CE_UNHASHED)) {
- if (!cache_name_compare(name, namelen, ce->name, ce->ce_flags))
- return 1;
- }
- ce = ce->next;
- }
- return 0;
-}
-
/*
* This only updates the "non-critical" parts of the directory
* cache, ie the parts that aren't tracked by GIT, and only used
@@ -438,7 +379,7 @@ int remove_index_entry_at(struct index_state *istate, int pos)
{
struct cache_entry *ce = istate->cache[pos];
- remove_index_entry(ce);
+ remove_name_hash(ce);
istate->cache_changed = 1;
istate->cache_nr--;
if (pos >= istate->cache_nr)
@@ -488,11 +429,43 @@ static int index_name_pos_also_unmerged(struct index_state *istate,
return pos;
}
+static int different_name(struct cache_entry *ce, struct cache_entry *alias)
+{
+ int len = ce_namelen(ce);
+ return ce_namelen(alias) != len || memcmp(ce->name, alias->name, len);
+}
+
+/*
+ * If we add a filename that aliases in the cache, we will use the
+ * name that we already have - but we don't want to update the same
+ * alias twice, because that implies that there were actually two
+ * different files with aliasing names!
+ *
+ * So we use the CE_ADDED flag to verify that the alias was an old
+ * one before we accept it as
+ */
+static struct cache_entry *create_alias_ce(struct cache_entry *ce, struct cache_entry *alias)
+{
+ int len;
+ struct cache_entry *new;
+
+ if (alias->ce_flags & CE_ADDED)
+ die("Will not add file alias '%s' ('%s' already exists in index)", ce->name, alias->name);
+
+ /* Ok, create the new entry using the name of the existing alias */
+ len = ce_namelen(alias);
+ new = xcalloc(1, cache_entry_size(len));
+ memcpy(new->name, alias->name, len);
+ copy_cache_entry(new, ce);
+ free(ce);
+ return new;
+}
+
int add_file_to_index(struct index_state *istate, const char *path, int verbose)
{
- int size, namelen, pos;
+ int size, namelen;
struct stat st;
- struct cache_entry *ce;
+ struct cache_entry *ce, *alias;
unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_RACY_IS_DIRTY;
if (lstat(path, &st))
@@ -525,18 +498,19 @@ int add_file_to_index(struct index_state *istate, const char *path, int verbose)
ce->ce_mode = ce_mode_from_stat(ent, st.st_mode);
}
- pos = index_name_pos(istate, ce->name, namelen);
- if (0 <= pos &&
- !ce_stage(istate->cache[pos]) &&
- !ie_match_stat(istate, istate->cache[pos], &st, ce_option)) {
+ alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
+ if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, &st, ce_option)) {
/* Nothing changed, really */
free(ce);
- ce_mark_uptodate(istate->cache[pos]);
+ ce_mark_uptodate(alias);
+ alias->ce_flags |= CE_ADDED;
return 0;
}
-
if (index_path(ce->sha1, path, &st, 1))
die("unable to index file %s", path);
+ if (ignore_case && alias && different_name(ce, alias))
+ ce = create_alias_ce(ce, alias);
+ ce->ce_flags |= CE_ADDED;
if (add_index_entry(istate, ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE))
die("unable to add %s to index",path);
if (verbose)