diff options
Diffstat (limited to 'sha1_file.c')
| -rw-r--r-- | sha1_file.c | 29 |
1 files changed, 23 insertions, 6 deletions
diff --git a/sha1_file.c b/sha1_file.c index 82a0188..111a71d 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -184,8 +184,8 @@ static struct alternate_object_database **alt_odb_tail; * alternate_object_database. The elements on this list come from * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, - * whose contents is exactly in the same format as that environment - * variable. Its base points at a statically allocated buffer that + * whose contents is similar to that environment variable but can be + * LF separated. Its base points at a statically allocated buffer that * contains "/the/directory/corresponding/to/.git/objects/...", while * its name points just after the slash at the end of ".git/objects/" * in the example above, and has enough space to hold 40-byte hex @@ -197,6 +197,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep, { const char *cp, *last; struct alternate_object_database *ent; + const char *objdir = get_object_directory(); int base_len = -1; last = alt; @@ -211,6 +212,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep, for ( ; cp < ep && *cp != sep; cp++) ; if (last != cp) { + struct alternate_object_database *alt; /* 43 = 40-byte + 2 '/' + terminating NUL */ int pfxlen = cp - last; int entlen = pfxlen + 43; @@ -223,9 +225,7 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep, pfxlen += base_len; } ent = xmalloc(sizeof(*ent) + entlen); - *alt_odb_tail = ent; - alt_odb_tail = &(ent->next); - ent->next = NULL; + if (*last != '/' && relative_base) { memcpy(ent->base, relative_base, base_len - 1); ent->base[base_len - 1] = '/'; @@ -237,6 +237,22 @@ static void link_alt_odb_entries(const char *alt, const char *ep, int sep, ent->name = ent->base + pfxlen + 1; ent->base[pfxlen] = ent->base[pfxlen + 3] = '/'; ent->base[entlen-1] = 0; + + /* Prevent the common mistake of listing the same + * thing twice, or object directory itself. + */ + for (alt = alt_odb_list; alt; alt = alt->next) + if (!memcmp(ent->base, alt->base, pfxlen)) + goto bad; + if (!memcmp(ent->base, objdir, pfxlen)) { + bad: + free(ent); + } + else { + *alt_odb_tail = ent; + alt_odb_tail = &(ent->next); + ent->next = NULL; + } } while (cp < ep && *cp == sep) cp++; @@ -531,8 +547,9 @@ void prepare_packed_git(void) prepare_packed_git_one(get_object_directory(), 1); prepare_alt_odb(); for (alt = alt_odb_list; alt; alt = alt->next) { - alt->name[0] = 0; + alt->name[-1] = 0; prepare_packed_git_one(alt->base, 0); + alt->name[-1] = '/'; } run_once = 1; } |