read-cache: add index.version config variable

diff --git a/read-cache.c b/read-cache.c
index c3d5e3543fae75c81a7a0a00c48bb0076675a2f1..6bc9724793dde0373d9e292908f11d2e80e9c34e 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -643,7 +643,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                        if (*ptr == '/') {
                                struct cache_entry *foundce;
                                ++ptr;
-                               foundce = index_name_exists(istate, ce->name, ptr - ce->name, ignore_case);
+                               foundce = index_dir_exists(istate, ce->name, ptr - ce->name - 1);
                                if (foundce) {
                                        memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
                                        startPtr = ptr;
@@ -652,7 +652,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
                }
        }
 
-       alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case);
+       alias = index_file_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);
@@ -1114,7 +1114,8 @@ static void show_file(const char * fmt, const char * name, int in_porcelain,
        printf(fmt, name);
 }
 
-int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec,
+int refresh_index(struct index_state *istate, unsigned int flags,
+                 const struct pathspec *pathspec,
                  char *seen, const char *header_msg)
 {
        int i;
@@ -1149,7 +1150,7 @@ int refresh_index(struct index_state *istate, unsigned int flags, const char **p
                        continue;
 
                if (pathspec &&
-                   !match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, seen))
+                   !match_pathspec_depth(pathspec, ce->name, ce_namelen(ce), 0, seen))
                        filtered = 1;
 
                if (ce_stage(ce)) {
@@ -1218,6 +1219,42 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int reall
 
 #define INDEX_FORMAT_DEFAULT 3
 
+static int index_format_config(const char *var, const char *value, void *cb)
+{
+       unsigned int *version = cb;
+       if (!strcmp(var, "index.version")) {
+               *version = git_config_int(var, value);
+               return 0;
+       }
+       return 1;
+}
+
+static unsigned int get_index_format_default(void)
+{
+       char *envversion = getenv("GIT_INDEX_VERSION");
+       char *endp;
+       unsigned int version = INDEX_FORMAT_DEFAULT;
+
+       if (!envversion) {
+               git_config(index_format_config, &version);
+               if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) {
+                       warning(_("index.version set, but the value is invalid.\n"
+                                 "Using version %i"), INDEX_FORMAT_DEFAULT);
+                       return INDEX_FORMAT_DEFAULT;
+               }
+               return version;
+       }
+
+       version = strtoul(envversion, &endp, 10);
+       if (*endp ||
+           version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) {
+               warning(_("GIT_INDEX_VERSION set, but the value is invalid.\n"
+                         "Using version %i"), INDEX_FORMAT_DEFAULT);
+               version = INDEX_FORMAT_DEFAULT;
+       }
+       return version;
+}
+
 /*
  * dev/ino/uid/gid/size are also just tracked to the low 32 bits
  * Again - this is just a (very strong in practice) heuristic that
@@ -1229,14 +1266,14 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int reall
 struct ondisk_cache_entry {
        struct cache_time ctime;
        struct cache_time mtime;
-       unsigned int dev;
-       unsigned int ino;
-       unsigned int mode;
-       unsigned int uid;
-       unsigned int gid;
-       unsigned int size;
+       uint32_t dev;
+       uint32_t ino;
+       uint32_t mode;
+       uint32_t uid;
+       uint32_t gid;
+       uint32_t size;
        unsigned char sha1[20];
-       unsigned short flags;
+       uint16_t flags;
        char name[FLEX_ARRAY]; /* more */
 };
 
@@ -1248,15 +1285,15 @@ struct ondisk_cache_entry {
 struct ondisk_cache_entry_extended {
        struct cache_time ctime;
        struct cache_time mtime;
-       unsigned int dev;
-       unsigned int ino;
-       unsigned int mode;
-       unsigned int uid;
-       unsigned int gid;
-       unsigned int size;
+       uint32_t dev;
+       uint32_t ino;
+       uint32_t mode;
+       uint32_t uid;
+       uint32_t gid;
+       uint32_t size;
        unsigned char sha1[20];
-       unsigned short flags;
-       unsigned short flags2;
+       uint16_t flags;
+       uint16_t flags2;
        char name[FLEX_ARRAY]; /* more */
 };
 
@@ -1794,7 +1831,7 @@ int write_index(struct index_state *istate, int newfd)
        }
 
        if (!istate->version)
-               istate->version = INDEX_FORMAT_DEFAULT;
+               istate->version = get_index_format_default();
 
        /* demote version 3 to version 2 when the latter suffices */
        if (istate->version == 3 || istate->version == 2)
@@ -1817,8 +1854,17 @@ int write_index(struct index_state *istate, int newfd)
                        continue;
                if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce))
                        ce_smudge_racily_clean_entry(ce);
-               if (is_null_sha1(ce->sha1))
-                       return error("cache entry has null sha1: %s", ce->name);
+               if (is_null_sha1(ce->sha1)) {
+                       static const char msg[] = "cache entry has null sha1: %s";
+                       static int allow = -1;
+
+                       if (allow < 0)
+                               allow = git_env_bool("GIT_ALLOW_NULL_SHA1", 0);
+                       if (allow)
+                               warning(msg, ce->name);
+                       else
+                               return error(msg, ce->name);
+               }
                if (ce_write_entry(&c, newfd, ce, previous_name) < 0)
                        return -1;
        }