git-apply: consider it an error to apply no changes

diff --git a/read-cache.c b/read-cache.c
index 14ed4fdf65047d2e553ff914a0c07ea112f96bcd..bfdaee02ab4f25d39620e8d398f90ce27ed03805 100644 (file)
--- a/read-cache.c
+++ b/read-cache.c
@@ -3,12 +3,31 @@
  *
  * Copyright (C) Linus Torvalds, 2005
  */
-#include <stdarg.h>
 #include "cache.h"
 
 struct cache_entry **active_cache = NULL;
 unsigned int active_nr = 0, active_alloc = 0, active_cache_changed = 0;
 
+/*
+ * This only updates the "non-critical" parts of the directory
+ * cache, ie the parts that aren't tracked by GIT, and only used
+ * to validate the cache.
+ */
+void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
+{
+       ce->ce_ctime.sec = htonl(st->st_ctime);
+       ce->ce_mtime.sec = htonl(st->st_mtime);
+#ifdef USE_NSEC
+       ce->ce_ctime.nsec = htonl(st->st_ctim.tv_nsec);
+       ce->ce_mtime.nsec = htonl(st->st_mtim.tv_nsec);
+#endif
+       ce->ce_dev = htonl(st->st_dev);
+       ce->ce_ino = htonl(st->st_ino);
+       ce->ce_uid = htonl(st->st_uid);
+       ce->ce_gid = htonl(st->st_gid);
+       ce->ce_size = htonl(st->st_size);
+}
+
 int ce_match_stat(struct cache_entry *ce, struct stat *st)
 {
        unsigned int changed = 0;
@@ -31,7 +50,7 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st)
        if (ce->ce_ctime.sec != htonl(st->st_ctime))
                changed |= CTIME_CHANGED;
 
-#ifdef NSEC
+#ifdef USE_NSEC
        /*
         * nsec seems unreliable - not all filesystems support it, so
         * as long as it is in the inode cache you get right nsec
@@ -46,14 +65,43 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st)
        if (ce->ce_uid != htonl(st->st_uid) ||
            ce->ce_gid != htonl(st->st_gid))
                changed |= OWNER_CHANGED;
-       if (ce->ce_dev != htonl(st->st_dev) ||
-           ce->ce_ino != htonl(st->st_ino))
+       if (ce->ce_ino != htonl(st->st_ino))
                changed |= INODE_CHANGED;
+
+#ifdef USE_STDEV
+       /*
+        * st_dev breaks on network filesystems where different
+        * clients will have different views of what "device"
+        * the filesystem is on
+        */
+       if (ce->ce_dev != htonl(st->st_dev))
+               changed |= INODE_CHANGED;
+#endif
+
        if (ce->ce_size != htonl(st->st_size))
                changed |= DATA_CHANGED;
        return changed;
 }
 
+int base_name_compare(const char *name1, int len1, int mode1,
+                     const char *name2, int len2, int mode2)
+{
+       unsigned char c1, c2;
+       int len = len1 < len2 ? len1 : len2;
+       int cmp;
+
+       cmp = memcmp(name1, name2, len);
+       if (cmp)
+               return cmp;
+       c1 = name1[len];
+       c2 = name2[len];
+       if (!c1 && S_ISDIR(mode1))
+               c1 = '/';
+       if (!c2 && S_ISDIR(mode2))
+               c2 = '/';
+       return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
+}
+
 int cache_name_compare(const char *name1, int flags1, const char *name2, int flags2)
 {
        int len1 = flags1 & CE_NAMEMASK;
@@ -152,11 +200,13 @@ static int check_file_directory_conflict(const struct cache_entry *ce,
        cp = pathbuf;
        while (1) {
                char *ep = strchr(cp, '/');
+               int len;
                if (!ep)
                        break;
                *ep = 0;    /* first cut it at slash */
+               len = ep - pathbuf;
                pos = cache_name_pos(pathbuf,
-                                    htons(create_ce_flags(ep-cp, stage)));
+                                    htons(create_ce_flags(len, stage)));
                if (0 <= pos) {
                        /* Our leading path component is registered as a file,
                         * and we are trying to make it a directory.  This is