teach convert_to_git a "dry run" mode

diff --git a/sha1_file.c b/sha1_file.c
index e002056b85ce89c089dd09c1300461d60d81dffa..956422ba4a5df5f46caaf85f10e4c85321439272 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -248,27 +248,30 @@ static int link_alt_odb_entry(const char * entry, int len, const char * relative
        const char *objdir = get_object_directory();
        struct alternate_object_database *ent;
        struct alternate_object_database *alt;
-       /* 43 = 40-byte + 2 '/' + terminating NUL */
-       int pfxlen = len;
-       int entlen = pfxlen + 43;
-       int base_len = -1;
+       int pfxlen, entlen;
+       struct strbuf pathbuf = STRBUF_INIT;
 
        if (!is_absolute_path(entry) && relative_base) {
-               /* Relative alt-odb */
-               if (base_len < 0)
-                       base_len = strlen(relative_base) + 1;
-               entlen += base_len;
-               pfxlen += base_len;
+               strbuf_addstr(&pathbuf, real_path(relative_base));
+               strbuf_addch(&pathbuf, '/');
        }
-       ent = xmalloc(sizeof(*ent) + entlen);
+       strbuf_add(&pathbuf, entry, len);
 
-       if (!is_absolute_path(entry) && relative_base) {
-               memcpy(ent->base, relative_base, base_len - 1);
-               ent->base[base_len - 1] = '/';
-               memcpy(ent->base + base_len, entry, len);
-       }
-       else
-               memcpy(ent->base, entry, pfxlen);
+       normalize_path_copy(pathbuf.buf, pathbuf.buf);
+
+       pfxlen = strlen(pathbuf.buf);
+
+       /*
+        * The trailing slash after the directory name is given by
+        * this function at the end. Remove duplicates.
+        */
+       while (pfxlen && pathbuf.buf[pfxlen-1] == '/')
+               pfxlen -= 1;
+
+       entlen = pfxlen + 43; /* '/' + 2 hex + '/' + 38 hex + NUL */
+       ent = xmalloc(sizeof(*ent) + entlen);
+       memcpy(ent->base, pathbuf.buf, pfxlen);
+       strbuf_release(&pathbuf);
 
        ent->name = ent->base + pfxlen + 1;
        ent->base[pfxlen + 3] = '/';
@@ -1264,7 +1267,8 @@ unsigned long unpack_object_header_buffer(const unsigned char *buf,
        while (c & 0x80) {
                if (len <= used || bitsizeof(long) <= shift) {
                        error("bad object header");
-                       return 0;
+                       size = used = 0;
+                       break;
                }
                c = buf[used++];
                size += (c & 0x7f) << shift;
@@ -1984,7 +1988,7 @@ off_t find_pack_entry_one(const unsigned char *sha1,
        return 0;
 }
 
-static int is_pack_valid(struct packed_git *p)
+int is_pack_valid(struct packed_git *p)
 {
        /* An already open pack is known to be valid. */
        if (p->pack_fd != -1)
@@ -2035,7 +2039,7 @@ static int find_pack_entry(const unsigned char *sha1, struct pack_entry *e)
                         * was loaded!
                         */
                        if (!is_pack_valid(p)) {
-                               error("packfile %s cannot be accessed", p->pack_name);
+                               warning("packfile %s cannot be accessed", p->pack_name);
                                goto next;
                        }
                        e->offset = offset;
@@ -2613,7 +2617,7 @@ static int index_mem(unsigned char *sha1, void *buf, size_t size,
        if ((type == OBJ_BLOB) && path) {
                struct strbuf nbuf = STRBUF_INIT;
                if (convert_to_git(path, buf, size, &nbuf,
-                                  write_object ? safe_crlf : 0)) {
+                                  write_object ? safe_crlf : SAFE_CRLF_FALSE)) {
                        buf = strbuf_detach(&nbuf, &size);
                        re_allocated = 1;
                }