Code

RelNotes: the first batch of topics graduated to 'master'
[git.git] / ll-merge.c
index 4c7f11ba84c67089dce7d725d87a4dd32a245c7f..da59738c9b787ae082ad062a91345a60628e704a 100644 (file)
@@ -15,10 +15,10 @@ struct ll_merge_driver;
 typedef int (*ll_merge_fn)(const struct ll_merge_driver *,
                           mmbuffer_t *result,
                           const char *path,
-                          mmfile_t *orig,
+                          mmfile_t *orig, const char *orig_name,
                           mmfile_t *src1, const char *name1,
                           mmfile_t *src2, const char *name2,
-                          int flag,
+                          const struct ll_merge_options *opts,
                           int marker_size);
 
 struct ll_merge_driver {
@@ -36,17 +36,21 @@ struct ll_merge_driver {
 static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
                           mmbuffer_t *result,
                           const char *path_unused,
-                          mmfile_t *orig,
+                          mmfile_t *orig, const char *orig_name,
                           mmfile_t *src1, const char *name1,
                           mmfile_t *src2, const char *name2,
-                          int flag, int marker_size)
+                          const struct ll_merge_options *opts,
+                          int marker_size)
 {
+       mmfile_t *stolen;
+       assert(opts);
+
        /*
         * The tentative merge result is "ours" for the final round,
         * or common ancestor for an internal merge.  Still return
         * "conflicted merge" status.
         */
-       mmfile_t *stolen = (flag & 01) ? orig : src1;
+       stolen = opts->virtual_ancestor ? orig : src1;
 
        result->ptr = stolen->ptr;
        result->size = stolen->size;
@@ -57,14 +61,14 @@ static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
 static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        mmbuffer_t *result,
                        const char *path,
-                       mmfile_t *orig,
+                       mmfile_t *orig, const char *orig_name,
                        mmfile_t *src1, const char *name1,
                        mmfile_t *src2, const char *name2,
-                       int flag, int marker_size)
+                       const struct ll_merge_options *opts,
+                       int marker_size)
 {
        xmparam_t xmp;
-       int style = 0;
-       int favor = (flag >> 1) & 03;
+       assert(opts);
 
        if (buffer_is_binary(orig->ptr, orig->size) ||
            buffer_is_binary(src1->ptr, src1->size) ||
@@ -73,70 +77,43 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        path, name1, name2);
                return ll_binary_merge(drv_unused, result,
                                       path,
-                                      orig, src1, name1,
+                                      orig, orig_name,
+                                      src1, name1,
                                       src2, name2,
-                                      flag, marker_size);
+                                      opts, marker_size);
        }
 
        memset(&xmp, 0, sizeof(xmp));
+       xmp.level = XDL_MERGE_ZEALOUS;
+       xmp.favor = opts->variant;
+       xmp.xpp.flags = opts->xdl_opts;
        if (git_xmerge_style >= 0)
-               style = git_xmerge_style;
+               xmp.style = git_xmerge_style;
        if (marker_size > 0)
                xmp.marker_size = marker_size;
-       return xdl_merge(orig,
-                        src1, name1,
-                        src2, name2,
-                        &xmp, XDL_MERGE_FLAGS(XDL_MERGE_ZEALOUS, style, favor),
-                        result);
+       xmp.ancestor = orig_name;
+       xmp.file1 = name1;
+       xmp.file2 = name2;
+       return xdl_merge(orig, src1, src2, &xmp, result);
 }
 
 static int ll_union_merge(const struct ll_merge_driver *drv_unused,
                          mmbuffer_t *result,
                          const char *path_unused,
-                         mmfile_t *orig,
+                         mmfile_t *orig, const char *orig_name,
                          mmfile_t *src1, const char *name1,
                          mmfile_t *src2, const char *name2,
-                         int flag, int marker_size)
+                         const struct ll_merge_options *opts,
+                         int marker_size)
 {
-       char *src, *dst;
-       long size;
-       int status, saved_style;
-
-       /* We have to force the RCS "merge" style */
-       saved_style = git_xmerge_style;
-       git_xmerge_style = 0;
-       status = ll_xdl_merge(drv_unused, result, path_unused,
-                             orig, src1, NULL, src2, NULL,
-                             flag, marker_size);
-       git_xmerge_style = saved_style;
-       if (status <= 0)
-               return status;
-       size = result->size;
-       src = dst = result->ptr;
-       while (size) {
-               char ch;
-               if ((marker_size < size) &&
-                   (*src == '<' || *src == '=' || *src == '>')) {
-                       int i;
-                       ch = *src;
-                       for (i = 0; i < marker_size; i++)
-                               if (src[i] != ch)
-                                       goto not_a_marker;
-                       if (src[marker_size] != '\n')
-                               goto not_a_marker;
-                       src += marker_size + 1;
-                       size -= marker_size + 1;
-                       continue;
-               }
-       not_a_marker:
-               do {
-                       ch = *src++;
-                       *dst++ = ch;
-                       size--;
-               } while (ch != '\n' && size);
-       }
-       result->size = dst - result->ptr;
-       return 0;
+       /* Use union favor */
+       struct ll_merge_options o;
+       assert(opts);
+       o = *opts;
+       o.variant = XDL_MERGE_FAVOR_UNION;
+       return ll_xdl_merge(drv_unused, result, path_unused,
+                           orig, NULL, src1, NULL, src2, NULL,
+                           &o, marker_size);
 }
 
 #define LL_BINARY_MERGE 0
@@ -165,23 +142,25 @@ static void create_temp(mmfile_t *src, char *path)
 static int ll_ext_merge(const struct ll_merge_driver *fn,
                        mmbuffer_t *result,
                        const char *path,
-                       mmfile_t *orig,
+                       mmfile_t *orig, const char *orig_name,
                        mmfile_t *src1, const char *name1,
                        mmfile_t *src2, const char *name2,
-                       int flag, int marker_size)
+                       const struct ll_merge_options *opts,
+                       int marker_size)
 {
        char temp[4][50];
        struct strbuf cmd = STRBUF_INIT;
-       struct strbuf_expand_dict_entry dict[] = {
-               { "O", temp[0] },
-               { "A", temp[1] },
-               { "B", temp[2] },
-               { "L", temp[3] },
-               { NULL }
-       };
+       struct strbuf_expand_dict_entry dict[5];
        const char *args[] = { NULL, NULL };
        int status, fd, i;
        struct stat st;
+       assert(opts);
+
+       dict[0].placeholder = "O"; dict[0].value = temp[0];
+       dict[1].placeholder = "A"; dict[1].value = temp[1];
+       dict[2].placeholder = "B"; dict[2].value = temp[2];
+       dict[3].placeholder = "L"; dict[3].value = temp[3];
+       dict[4].placeholder = NULL; dict[4].value = NULL;
 
        if (fn->cmdline == NULL)
                die("custom merge driver %s lacks command line.", fn->name);
@@ -351,22 +330,40 @@ static int git_path_check_merge(const char *path, struct git_attr_check check[2]
                check[0].attr = git_attr("merge");
                check[1].attr = git_attr("conflict-marker-size");
        }
-       return git_checkattr(path, 2, check);
+       return git_check_attr(path, 2, check);
+}
+
+static void normalize_file(mmfile_t *mm, const char *path)
+{
+       struct strbuf strbuf = STRBUF_INIT;
+       if (renormalize_buffer(path, mm->ptr, mm->size, &strbuf)) {
+               free(mm->ptr);
+               mm->size = strbuf.len;
+               mm->ptr = strbuf_detach(&strbuf, NULL);
+       }
 }
 
 int ll_merge(mmbuffer_t *result_buf,
             const char *path,
-            mmfile_t *ancestor,
+            mmfile_t *ancestor, const char *ancestor_label,
             mmfile_t *ours, const char *our_label,
             mmfile_t *theirs, const char *their_label,
-            int flag)
+            const struct ll_merge_options *opts)
 {
        static struct git_attr_check check[2];
+       static const struct ll_merge_options default_opts;
        const char *ll_driver_name = NULL;
        int marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
        const struct ll_merge_driver *driver;
-       int virtual_ancestor = flag & 01;
 
+       if (!opts)
+               opts = &default_opts;
+
+       if (opts->renormalize) {
+               normalize_file(ancestor, path);
+               normalize_file(ours, path);
+               normalize_file(theirs, path);
+       }
        if (!git_path_check_merge(path, check)) {
                ll_driver_name = check[0].value;
                if (check[1].value) {
@@ -376,11 +373,11 @@ int ll_merge(mmbuffer_t *result_buf,
                }
        }
        driver = find_ll_merge_driver(ll_driver_name);
-       if (virtual_ancestor && driver->recursive)
+       if (opts->virtual_ancestor && driver->recursive)
                driver = find_ll_merge_driver(driver->recursive);
-       return driver->fn(driver, result_buf, path, ancestor,
+       return driver->fn(driver, result_buf, path, ancestor, ancestor_label,
                          ours, our_label, theirs, their_label,
-                         flag, marker_size);
+                         opts, marker_size);
 }
 
 int ll_merge_marker_size(const char *path)
@@ -390,7 +387,7 @@ int ll_merge_marker_size(const char *path)
 
        if (!check.attr)
                check.attr = git_attr("conflict-marker-size");
-       if (!git_checkattr(path, 1, &check) && check.value) {
+       if (!git_check_attr(path, 1, &check) && check.value) {
                marker_size = atoi(check.value);
                if (marker_size <= 0)
                        marker_size = DEFAULT_CONFLICT_MARKER_SIZE;