pack-objects: improve path grouping heuristics.

[git.git] / builtin-apply.c

diff --git a/builtin-apply.c b/builtin-apply.c
index f16c753..6a4fb96 100644 (file)
--- a/builtin-apply.c
+++ b/builtin-apply.c
@@ -1335,6 +1335,7 @@ static int apply_line(char *output, const char *patch, int plen)
 
 static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
 {
+       int match_beginning, match_end;
        char *buf = desc->buffer;
        const char *patch = frag->patch;
        int offset, size = frag->size;
@@ -1397,10 +1398,22 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
        newlines = new;
        leading = frag->leading;
        trailing = frag->trailing;
+
+       /*
+        * If we don't have any leading/trailing data in the patch,
+        * we want it to match at the beginning/end of the file.
+        */
+       match_beginning = !leading && (frag->oldpos == 1);
+       match_end = !trailing;
+
        lines = 0;
        pos = frag->newpos;
        for (;;) {
                offset = find_offset(buf, desc->size, oldlines, oldsize, pos, &lines);
+               if (match_end && offset + oldsize != desc->size)
+                       offset = -1;
+               if (match_beginning && offset)
+                       offset = -1;
                if (offset >= 0) {
                        int diff = newsize - oldsize;
                        unsigned long size = desc->size + diff;
@@ -1430,6 +1443,10 @@ static int apply_one_fragment(struct buffer_desc *desc, struct fragment *frag)
                /* Am I at my context limits? */
                if ((leading <= p_context) && (trailing <= p_context))
                        break;
+               if (match_beginning || match_end) {
+                       match_beginning = match_end = 0;
+                       continue;
+               }
                /* Reduce the number of context lines
                 * Reduce both leading and trailing if they are equal
                 * otherwise just reduce the larger context.