git-p4: add failing test for P4EDITOR handling

diff --git a/diffcore-rename.c b/diffcore-rename.c
index 749a35d2c2ab3271c6503a19271a5be6a6e97b4d..af1fe08861e6862985ac8fb9311b17568cb9e547 100644 (file)
--- a/diffcore-rename.c
+++ b/diffcore-rename.c
@@ -15,8 +15,7 @@ static struct diff_rename_dst {
 } *rename_dst;
 static int rename_dst_nr, rename_dst_alloc;
 
-static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
-                                                int insert_ok)
+static int find_rename_dst(struct diff_filespec *two)
 {
        int first, last;
 
@@ -27,16 +26,33 @@ static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
                struct diff_rename_dst *dst = &(rename_dst[next]);
                int cmp = strcmp(two->path, dst->two->path);
                if (!cmp)
-                       return dst;
+                       return next;
                if (cmp < 0) {
                        last = next;
                        continue;
                }
                first = next+1;
        }
-       /* not found */
-       if (!insert_ok)
-               return NULL;
+       return -first - 1;
+}
+
+static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two)
+{
+       int ofs = find_rename_dst(two);
+       return ofs < 0 ? NULL : &rename_dst[ofs];
+}
+
+/*
+ * Returns 0 on success, -1 if we found a duplicate.
+ */
+static int add_rename_dst(struct diff_filespec *two)
+{
+       int first = find_rename_dst(two);
+
+       if (first >= 0)
+               return -1;
+       first = -first - 1;
+
        /* insert to make it at "first" */
        ALLOC_GROW(rename_dst, rename_dst_nr + 1, rename_dst_alloc);
        rename_dst_nr++;
@@ -46,7 +62,7 @@ static struct diff_rename_dst *locate_rename_dst(struct diff_filespec *two,
        rename_dst[first].two = alloc_filespec(two->path);
        fill_filespec(rename_dst[first].two, two->sha1, two->sha1_valid, two->mode);
        rename_dst[first].pair = NULL;
-       return &(rename_dst[first]);
+       return 0;
 }
 
 /* Table of rename/copy src files */
@@ -147,9 +163,11 @@ static int estimate_similarity(struct diff_filespec *src,
         * is a possible size - we really should have a flag to
         * say whether the size is valid or not!)
         */
-       if (!src->cnt_data && diff_populate_filespec(src, 1))
+       if (!src->cnt_data &&
+           diff_populate_filespec(src, CHECK_SIZE_ONLY))
                return 0;
-       if (!dst->cnt_data && diff_populate_filespec(dst, 1))
+       if (!dst->cnt_data &&
+           diff_populate_filespec(dst, CHECK_SIZE_ONLY))
                return 0;
 
        max_size = ((src->size > dst->size) ? src->size : dst->size);
@@ -242,14 +260,12 @@ struct file_similarity {
 
 static unsigned int hash_filespec(struct diff_filespec *filespec)
 {
-       unsigned int hash;
        if (!filespec->sha1_valid) {
                if (diff_populate_filespec(filespec, 0))
                        return 0;
                hash_sha1_file(filespec->data, filespec->size, "blob", filespec->sha1);
        }
-       memcpy(&hash, filespec->sha1, sizeof(hash));
-       return hash;
+       return sha1hash(filespec->sha1);
 }
 
 static int find_identical_files(struct hashmap *srcs,
@@ -259,15 +275,14 @@ static int find_identical_files(struct hashmap *srcs,
        int renames = 0;
 
        struct diff_filespec *target = rename_dst[dst_index].two;
-       struct file_similarity *p, *best, dst;
+       struct file_similarity *p, *best = NULL;
        int i = 100, best_score = -1;
 
        /*
         * Find the best source match for specified destination.
         */
-       best = NULL;
-       hashmap_entry_init(&dst, hash_filespec(target));
-       for (p = hashmap_get(srcs, &dst, NULL); p; p = hashmap_get_next(srcs, p)) {
+       p = hashmap_get_from_hash(srcs, hash_filespec(target), NULL);
+       for (; p; p = hashmap_get_next(srcs, p)) {
                int score;
                struct diff_filespec *source = p->filespec;
 
@@ -451,8 +466,12 @@ void diffcore_rename(struct diff_options *options)
                        else if (!DIFF_OPT_TST(options, RENAME_EMPTY) &&
                                 is_empty_blob_sha1(p->two->sha1))
                                continue;
-                       else
-                               locate_rename_dst(p->two, 1);
+                       else if (add_rename_dst(p->two) < 0) {
+                               warning("skipping rename detection, detected"
+                                       " duplicate destination '%s'",
+                                       p->two->path);
+                               goto cleanup;
+                       }
                }
                else if (!DIFF_OPT_TST(options, RENAME_EMPTY) &&
                         is_empty_blob_sha1(p->one->sha1))
@@ -583,8 +602,7 @@ void diffcore_rename(struct diff_options *options)
                         * We would output this create record if it has
                         * not been turned into a rename/copy already.
                         */
-                       struct diff_rename_dst *dst =
-                               locate_rename_dst(p->two, 0);
+                       struct diff_rename_dst *dst = locate_rename_dst(p->two);
                        if (dst && dst->pair) {
                                diff_q(&outq, dst->pair);
                                pair_to_free = p;
@@ -614,8 +632,7 @@ void diffcore_rename(struct diff_options *options)
                         */
                        if (DIFF_PAIR_BROKEN(p)) {
                                /* broken delete */
-                               struct diff_rename_dst *dst =
-                                       locate_rename_dst(p->one, 0);
+                               struct diff_rename_dst *dst = locate_rename_dst(p->one);
                                if (dst && dst->pair)
                                        /* counterpart is now rename/copy */
                                        pair_to_free = p;