Merge branch 'jk/clean-d-pathspec'

diff --git a/read-cache.c b/read-cache.c
index fb440b4d9d1aa002ebc760e4fa4e0f0d028fd868..f23c44a81a56f43e95a0e14fb37a84bac1a06caf 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -1220,6 +1220,42 @@ static struct cache_entry *refresh_cache_entry(struct cache_entry *ce,
 
 #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
@@ -1776,7 +1812,7 @@ 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)