merge: refactor code that calls "git merge-STRATEGY"

diff --git a/resolve-undo.c b/resolve-undo.c
index 86e8547ca25c72f0cce5a4ca2780a3f93dac33ae..0f50ee0484776c545e632cde69b0646629a3b190 100644 (file)
--- a/resolve-undo.c
+++ b/resolve-undo.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "dir.h"
 #include "resolve-undo.h"
 #include "string-list.h"
 
@@ -52,7 +53,7 @@ void resolve_undo_write(struct strbuf *sb, struct string_list *resolve_undo)
        for_each_string_list(write_one, resolve_undo, sb);
 }
 
-struct string_list *resolve_undo_read(void *data, unsigned long size)
+struct string_list *resolve_undo_read(const char *data, unsigned long size)
 {
        struct string_list *resolve_undo;
        size_t len;
@@ -92,7 +93,7 @@ struct string_list *resolve_undo_read(void *data, unsigned long size)
                                continue;
                        if (size < 20)
                                goto error;
-                       hashcpy(ui->sha1[i], data);
+                       hashcpy(ui->sha1[i], (const unsigned char *)data);
                        size -= 20;
                        data += 20;
                }
@@ -115,3 +116,61 @@ void resolve_undo_clear_index(struct index_state *istate)
        istate->resolve_undo = NULL;
        istate->cache_changed = 1;
 }
+
+int unmerge_index_entry_at(struct index_state *istate, int pos)
+{
+       struct cache_entry *ce;
+       struct string_list_item *item;
+       struct resolve_undo_info *ru;
+       int i, err = 0;
+
+       if (!istate->resolve_undo)
+               return pos;
+
+       ce = istate->cache[pos];
+       if (ce_stage(ce)) {
+               /* already unmerged */
+               while ((pos < istate->cache_nr) &&
+                      ! strcmp(istate->cache[pos]->name, ce->name))
+                       pos++;
+               return pos - 1; /* return the last entry processed */
+       }
+       item = string_list_lookup(ce->name, istate->resolve_undo);
+       if (!item)
+               return pos;
+       ru = item->util;
+       if (!ru)
+               return pos;
+       remove_index_entry_at(istate, pos);
+       for (i = 0; i < 3; i++) {
+               struct cache_entry *nce;
+               if (!ru->mode[i])
+                       continue;
+               nce = make_cache_entry(ru->mode[i], ru->sha1[i],
+                                      ce->name, i + 1, 0);
+               if (add_index_entry(istate, nce, ADD_CACHE_OK_TO_ADD)) {
+                       err = 1;
+                       error("cannot unmerge '%s'", ce->name);
+               }
+       }
+       if (err)
+               return pos;
+       free(ru);
+       item->util = NULL;
+       return unmerge_index_entry_at(istate, pos);
+}
+
+void unmerge_index(struct index_state *istate, const char **pathspec)
+{
+       int i;
+
+       if (!istate->resolve_undo)
+               return;
+
+       for (i = 0; i < istate->cache_nr; i++) {
+               struct cache_entry *ce = istate->cache[i];
+               if (!match_pathspec(pathspec, ce->name, ce_namelen(ce), 0, NULL))
+                       continue;
+               i = unmerge_index_entry_at(istate, i);
+       }
+}