Git 2.4.10

diff --git a/sha1_file.c b/sha1_file.c
index 001537c9359bf83fdc4d6c59426a25424be2e803..99155c0d6b77aa2a772330d51fa604b1c4a9b0cf 100644 (file)
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -377,15 +377,12 @@ void read_info_alternates(const char * relative_base, int depth)
        char *map;
        size_t mapsz;
        struct stat st;
-       const char alt_file_name[] = "info/alternates";
-       /* Given that relative_base is no longer than PATH_MAX,
-          ensure that "path" has enough space to append "/", the
-          file name, "info/alternates", and a trailing NUL.  */
-       char path[PATH_MAX + 1 + sizeof alt_file_name];
+       char *path;
        int fd;
 
-       sprintf(path, "%s/%s", relative_base, alt_file_name);
+       path = xstrfmt("%s/info/alternates", relative_base);
        fd = git_open_noatime(path);
+       free(path);
        if (fd < 0)
                return;
        if (fstat(fd, &st) || (st.st_size == 0)) {
@@ -443,6 +440,7 @@ void prepare_alt_odb(void)
        read_info_alternates(get_object_directory(), 0);
 }
 
+/* Returns 1 if we have successfully freshened the file, 0 otherwise. */
 static int freshen_file(const char *fn)
 {
        struct utimbuf t;
@@ -450,11 +448,18 @@ static int freshen_file(const char *fn)
        return !utime(fn, &t);
 }
 
+/*
+ * All of the check_and_freshen functions return 1 if the file exists and was
+ * freshened (if freshening was requested), 0 otherwise. If they return
+ * 0, you should not assume that it is safe to skip a write of the object (it
+ * either does not exist on disk, or has a stale mtime and may be subject to
+ * pruning).
+ */
 static int check_and_freshen_file(const char *fn, int freshen)
 {
        if (access(fn, F_OK))
                return 0;
-       if (freshen && freshen_file(fn))
+       if (freshen && !freshen_file(fn))
                return 0;
        return 1;
 }
@@ -707,8 +712,8 @@ static void mmap_limit_check(size_t length)
                    (uintmax_t)length, (uintmax_t)limit);
 }
 
-void *xmmap(void *start, size_t length,
-       int prot, int flags, int fd, off_t offset)
+void *xmmap_gently(void *start, size_t length,
+                 int prot, int flags, int fd, off_t offset)
 {
        void *ret;
 
@@ -719,12 +724,19 @@ void *xmmap(void *start, size_t length,
                        return NULL;
                release_pack_memory(length);
                ret = mmap(start, length, prot, flags, fd, offset);
-               if (ret == MAP_FAILED)
-                       die_errno("Out of memory? mmap failed");
        }
        return ret;
 }
 
+void *xmmap(void *start, size_t length,
+       int prot, int flags, int fd, off_t offset)
+{
+       void *ret = xmmap_gently(start, length, prot, flags, fd, offset);
+       if (ret == MAP_FAILED)
+               die_errno("mmap failed");
+       return ret;
+}
+
 void close_pack_windows(struct packed_git *p)
 {
        while (p->windows) {
@@ -3077,7 +3089,7 @@ int has_sha1_pack(const unsigned char *sha1)
        return find_pack_entry(sha1, &e);
 }
 
-int has_sha1_file(const unsigned char *sha1)
+int has_sha1_file_with_flags(const unsigned char *sha1, int flags)
 {
        struct pack_entry e;
 
@@ -3085,6 +3097,8 @@ int has_sha1_file(const unsigned char *sha1)
                return 1;
        if (has_loose_object(sha1))
                return 1;
+       if (flags & HAS_SHA1_QUICK)
+               return 0;
        reprepare_packed_git();
        return find_pack_entry(sha1, &e);
 }
@@ -3202,7 +3216,7 @@ static int index_core(unsigned char *sha1, int fd, size_t size,
        int ret;
 
        if (!size) {
-               ret = index_mem(sha1, NULL, size, type, path, flags);
+               ret = index_mem(sha1, "", size, type, path, flags);
        } else if (size <= SMALL_FILE_SIZE) {
                char *buf = xmalloc(size);
                if (size == read_in_full(fd, buf, size))