commit: allow associating auxiliary info on-demand

diff --git a/merge-recursive.c b/merge-recursive.c
index 2f8febe0e0a64e869b33585fa43ca22b922cec8d..ea9dbd307c60a16f290b44964c386e566b6bc7e3 100644 (file)
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -493,8 +493,7 @@ static struct string_list *get_renames(struct merge_options *o,
        opts.rename_score = o->rename_score;
        opts.show_rename_progress = o->show_rename_progress;
        opts.output_format = DIFF_FORMAT_NO_OUTPUT;
-       if (diff_setup_done(&opts) < 0)
-               die(_("diff setup failed"));
+       diff_setup_done(&opts);
        diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts);
        diffcore_std(&opts);
        if (opts.needed_rename_limit > o->needed_rename_limit)
@@ -614,23 +613,6 @@ static char *unique_path(struct merge_options *o, const char *path, const char *
        return newpath;
 }
 
-static void flush_buffer(int fd, const char *buf, unsigned long size)
-{
-       while (size > 0) {
-               long ret = write_in_full(fd, buf, size);
-               if (ret < 0) {
-                       /* Ignore epipe */
-                       if (errno == EPIPE)
-                               break;
-                       die_errno("merge-recursive");
-               } else if (!ret) {
-                       die(_("merge-recursive: disk full?"));
-               }
-               size -= ret;
-               buf += ret;
-       }
-}
-
 static int dir_in_way(const char *path, int check_working_copy)
 {
        int pos, pathlen = strlen(path);
@@ -789,7 +771,7 @@ static void update_file_flags(struct merge_options *o,
                        fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
                        if (fd < 0)
                                die_errno(_("failed to open '%s'"), path);
-                       flush_buffer(fd, buf, size);
+                       write_in_full(fd, buf, size);
                        close(fd);
                } else if (S_ISLNK(mode)) {
                        char *lnk = xmemdupz(buf, size);
@@ -994,7 +976,7 @@ merge_file_special_markers(struct merge_options *o,
        return mfi;
 }
 
-static struct merge_file_info merge_file(struct merge_options *o,
+static struct merge_file_info merge_file_one(struct merge_options *o,
                                         const char *path,
                                         const unsigned char *o_sha, int o_mode,
                                         const unsigned char *a_sha, int a_mode,
@@ -1184,7 +1166,7 @@ static void conflict_rename_rename_1to2(struct merge_options *o,
                struct merge_file_info mfi;
                struct diff_filespec other;
                struct diff_filespec *add;
-               mfi = merge_file(o, one->path,
+               mfi = merge_file_one(o, one->path,
                                 one->sha1, one->mode,
                                 a->sha1, a->mode,
                                 b->sha1, b->mode,
@@ -1468,7 +1450,7 @@ static int process_renames(struct merge_options *o,
                                       ren1_dst, branch2);
                                if (o->call_depth) {
                                        struct merge_file_info mfi;
-                                       mfi = merge_file(o, ren1_dst, null_sha1, 0,
+                                       mfi = merge_file_one(o, ren1_dst, null_sha1, 0,
                                                         ren1->pair->two->sha1, ren1->pair->two->mode,
                                                         dst_other.sha1, dst_other.mode,
                                                         branch1, branch2);
@@ -2086,6 +2068,15 @@ int parse_merge_opt(struct merge_options *o, const char *s)
                o->xdl_opts = DIFF_WITH_ALG(o, PATIENCE_DIFF);
        else if (!strcmp(s, "histogram"))
                o->xdl_opts = DIFF_WITH_ALG(o, HISTOGRAM_DIFF);
+       else if (!strcmp(s, "diff-algorithm=")) {
+               long value = parse_algorithm_value(s+15);
+               if (value < 0)
+                       return -1;
+               /* clear out previous settings */
+               DIFF_XDL_CLR(o, NEED_MINIMAL);
+               o->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK;
+               o->xdl_opts |= value;
+       }
        else if (!strcmp(s, "ignore-space-change"))
                o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
        else if (!strcmp(s, "ignore-all-space"))