Merge branch 'db/checkout'
[git.git] / unpack-trees.c
index 56c1ffbc199c534a53da9615aa16b4357656e320..3e448d8974eb6d738fec2c35cc5a9ffbc8764411 100644 (file)
@@ -85,6 +85,7 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                int any_dirs = 0;
                char *cache_name;
                int ce_stage;
+               int skip_entry = 0;
 
                /* Find the first name in the input. */
 
@@ -122,13 +123,13 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
 
 #if DBRT_DEBUG > 1
                if (first)
-                       printf("index %s\n", first);
+                       fprintf(stderr, "index %s\n", first);
 #endif
                for (i = 0; i < len; i++) {
                        if (!posns[i] || posns[i] == df_conflict_list)
                                continue;
 #if DBRT_DEBUG > 1
-                       printf("%d %s\n", i + 1, posns[i]->name);
+                       fprintf(stderr, "%d %s\n", i + 1, posns[i]->name);
 #endif
                        if (!first || entcmp(first, firstdir,
                                             posns[i]->name,
@@ -153,6 +154,8 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                        any_files = 1;
                        src[0] = active_cache[o->pos];
                        remove = o->pos;
+                       if (o->skip_unmerged && ce_stage(src[0]))
+                               skip_entry = 1;
                }
 
                for (i = 0; i < len; i++) {
@@ -181,6 +184,12 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                                continue;
                        }
 
+                       if (skip_entry) {
+                               subposns[i] = df_conflict_list;
+                               posns[i] = posns[i]->next;
+                               continue;
+                       }
+
                        if (!o->merge)
                                ce_stage = 0;
                        else if (i + 1 < o->head_idx)
@@ -205,23 +214,31 @@ static int unpack_trees_rec(struct tree_entry_list **posns, int len,
                        posns[i] = posns[i]->next;
                }
                if (any_files) {
-                       if (o->merge) {
+                       if (skip_entry) {
+                               o->pos++;
+                               while (o->pos < active_nr &&
+                                      !strcmp(active_cache[o->pos]->name,
+                                              src[0]->name))
+                                       o->pos++;
+                       } else if (o->merge) {
                                int ret;
 
 #if DBRT_DEBUG > 1
-                               printf("%s:\n", first);
+                               fprintf(stderr, "%s:\n", first);
                                for (i = 0; i < src_size; i++) {
-                                       printf(" %d ", i);
+                                       fprintf(stderr, " %d ", i);
                                        if (src[i])
-                                               printf("%s\n", sha1_to_hex(src[i]->sha1));
+                                               fprintf(stderr, "%06x %s\n", src[i]->ce_mode, sha1_to_hex(src[i]->sha1));
                                        else
-                                               printf("\n");
+                                               fprintf(stderr, "\n");
                                }
 #endif
                                ret = o->fn(src, o, remove);
+                               if (ret < 0)
+                                       return ret;
 
 #if DBRT_DEBUG > 1
-                               printf("Added %d entries\n", ret);
+                               fprintf(stderr, "Added %d entries\n", ret);
 #endif
                                o->pos += ret;
                        } else {
@@ -286,16 +303,16 @@ static void unlink_entry(char *name, char *last_symlink)
 }
 
 static struct checkout state;
-static void check_updates(struct cache_entry **src, int nr,
-                       struct unpack_trees_options *o)
+static void check_updates(struct unpack_trees_options *o)
 {
        unsigned cnt = 0, total = 0;
        struct progress *progress = NULL;
        char last_symlink[PATH_MAX];
+       int i;
 
        if (o->update && o->verbose_update) {
-               for (total = cnt = 0; cnt < nr; cnt++) {
-                       struct cache_entry *ce = src[cnt];
+               for (total = cnt = 0; cnt < active_nr; cnt++) {
+                       struct cache_entry *ce = active_cache[cnt];
                        if (ce->ce_flags & (CE_UPDATE | CE_REMOVE))
                                total++;
                }
@@ -306,14 +323,16 @@ static void check_updates(struct cache_entry **src, int nr,
        }
 
        *last_symlink = '\0';
-       while (nr--) {
-               struct cache_entry *ce = *src++;
+       for (i = 0; i < active_nr; i++) {
+               struct cache_entry *ce = active_cache[i];
 
                if (ce->ce_flags & (CE_UPDATE | CE_REMOVE))
                        display_progress(progress, ++cnt);
                if (ce->ce_flags & CE_REMOVE) {
                        if (o->update)
                                unlink_entry(ce->name, last_symlink);
+                       remove_cache_entry_at(i);
+                       i--;
                        continue;
                }
                if (ce->ce_flags & CE_UPDATE) {
@@ -354,23 +373,34 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
                        posns[i] = create_tree_entry_list(t+i);
 
                if (unpack_trees_rec(posns, len, o->prefix ? o->prefix : "",
-                                    o, &df_conflict_list))
+                                    o, &df_conflict_list)) {
+                       if (o->gently) {
+                               discard_cache();
+                               read_cache();
+                       }
                        return -1;
+               }
        }
 
-       if (o->trivial_merges_only && o->nontrivial_merge)
-               die("Merge requires file-level merging");
+       if (o->trivial_merges_only && o->nontrivial_merge) {
+               if (o->gently) {
+                       discard_cache();
+                       read_cache();
+               }
+               return o->gently ? -1 :
+                       error("Merge requires file-level merging");
+       }
 
-       check_updates(active_cache, active_nr, o);
+       check_updates(o);
        return 0;
 }
 
 /* Here come the merge functions */
 
-static void reject_merge(struct cache_entry *ce)
+static int reject_merge(struct cache_entry *ce)
 {
-       die("Entry '%s' would be overwritten by merge. Cannot merge.",
-           ce->name);
+       return error("Entry '%s' would be overwritten by merge. Cannot merge.",
+                    ce->name);
 }
 
 static int same(struct cache_entry *a, struct cache_entry *b)
@@ -388,18 +418,18 @@ static int same(struct cache_entry *a, struct cache_entry *b)
  * When a CE gets turned into an unmerged entry, we
  * want it to be up-to-date
  */
-static void verify_uptodate(struct cache_entry *ce,
+static int verify_uptodate(struct cache_entry *ce,
                struct unpack_trees_options *o)
 {
        struct stat st;
 
        if (o->index_only || o->reset)
-               return;
+               return 0;
 
        if (!lstat(ce->name, &st)) {
                unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID);
                if (!changed)
-                       return;
+                       return 0;
                /*
                 * NEEDSWORK: the current default policy is to allow
                 * submodule to be out of sync wrt the supermodule
@@ -408,12 +438,13 @@ static void verify_uptodate(struct cache_entry *ce,
                 * checked out.
                 */
                if (S_ISGITLINK(ce->ce_mode))
-                       return;
+                       return 0;
                errno = 0;
        }
        if (errno == ENOENT)
-               return;
-       die("Entry '%s' not uptodate. Cannot merge.", ce->name);
+               return 0;
+       return o->gently ? -1 :
+               error("Entry '%s' not uptodate. Cannot merge.", ce->name);
 }
 
 static void invalidate_ce_path(struct cache_entry *ce)
@@ -479,7 +510,8 @@ static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
                 * ce->name is an entry in the subdirectory.
                 */
                if (!ce_stage(ce)) {
-                       verify_uptodate(ce, o);
+                       if (verify_uptodate(ce, o))
+                               return -1;
                        ce->ce_flags |= CE_REMOVE;
                }
                cnt++;
@@ -498,8 +530,9 @@ static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
                d.exclude_per_dir = o->dir->exclude_per_dir;
        i = read_directory(&d, ce->name, pathbuf, namelen+1, NULL);
        if (i)
-               die("Updating '%s' would lose untracked files in it",
-                   ce->name);
+               return o->gently ? -1 :
+                       error("Updating '%s' would lose untracked files in it",
+                             ce->name);
        free(pathbuf);
        return cnt;
 }
@@ -508,16 +541,16 @@ static int verify_clean_subdirectory(struct cache_entry *ce, const char *action,
  * We do not want to remove or overwrite a working tree file that
  * is not tracked, unless it is ignored.
  */
-static void verify_absent(struct cache_entry *ce, const char *action,
-               struct unpack_trees_options *o)
+static int verify_absent(struct cache_entry *ce, const char *action,
+                        struct unpack_trees_options *o)
 {
        struct stat st;
 
        if (o->index_only || o->reset || !o->update)
-               return;
+               return 0;
 
        if (has_symlink_leading_path(ce->name, NULL))
-               return;
+               return 0;
 
        if (!lstat(ce->name, &st)) {
                int cnt;
@@ -528,7 +561,7 @@ static void verify_absent(struct cache_entry *ce, const char *action,
                         * ce->name is explicitly excluded, so it is Ok to
                         * overwrite it.
                         */
-                       return;
+                       return 0;
                if (S_ISDIR(st.st_mode)) {
                        /*
                         * We are checking out path "foo" and
@@ -557,7 +590,7 @@ static void verify_absent(struct cache_entry *ce, const char *action,
                         * deleted entries here.
                         */
                        o->pos += cnt;
-                       return;
+                       return 0;
                }
 
                /*
@@ -569,12 +602,14 @@ static void verify_absent(struct cache_entry *ce, const char *action,
                if (0 <= cnt) {
                        struct cache_entry *ce = active_cache[cnt];
                        if (ce->ce_flags & CE_REMOVE)
-                               return;
+                               return 0;
                }
 
-               die("Untracked working tree file '%s' "
-                   "would be %s by merge.", ce->name, action);
+               return o->gently ? -1 :
+                       error("Untracked working tree file '%s' "
+                             "would be %s by merge.", ce->name, action);
        }
+       return 0;
 }
 
 static int merged_entry(struct cache_entry *merge, struct cache_entry *old,
@@ -592,12 +627,14 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old,
                if (same(old, merge)) {
                        copy_cache_entry(merge, old);
                } else {
-                       verify_uptodate(old, o);
+                       if (verify_uptodate(old, o))
+                               return -1;
                        invalidate_ce_path(old);
                }
        }
        else {
-               verify_absent(merge, "overwritten", o);
+               if (verify_absent(merge, "overwritten", o))
+                       return -1;
                invalidate_ce_path(merge);
        }
 
@@ -609,10 +646,12 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old,
 static int deleted_entry(struct cache_entry *ce, struct cache_entry *old,
                struct unpack_trees_options *o)
 {
-       if (old)
-               verify_uptodate(old, o);
-       else
-               verify_absent(ce, "removed", o);
+       if (old) {
+               if (verify_uptodate(old, o))
+                       return -1;
+       } else
+               if (verify_absent(ce, "removed", o))
+                       return -1;
        ce->ce_flags |= CE_REMOVE;
        add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
        invalidate_ce_path(ce);
@@ -700,16 +739,15 @@ int threeway_merge(struct cache_entry **stages,
        /* #14, #14ALT, #2ALT */
        if (remote && !df_conflict_head && head_match && !remote_match) {
                if (index && !same(index, remote) && !same(index, head))
-                       reject_merge(index);
+                       return o->gently ? -1 : reject_merge(index);
                return merged_entry(remote, index, o);
        }
        /*
         * If we have an entry in the index cache, then we want to
         * make sure that it matches head.
         */
-       if (index && !same(index, head)) {
-               reject_merge(index);
-       }
+       if (index && !same(index, head))
+               return o->gently ? -1 : reject_merge(index);
 
        if (head) {
                /* #5ALT, #15 */
@@ -759,8 +797,10 @@ int threeway_merge(struct cache_entry **stages,
                        remove_entry(remove);
                        if (index)
                                return deleted_entry(index, index, o);
-                       else if (ce && !head_deleted)
-                               verify_absent(ce, "removed", o);
+                       else if (ce && !head_deleted) {
+                               if (verify_absent(ce, "removed", o))
+                                       return -1;
+                       }
                        return 0;
                }
                /*
@@ -776,7 +816,8 @@ int threeway_merge(struct cache_entry **stages,
         * conflict resolution files.
         */
        if (index) {
-               verify_uptodate(index, o);
+               if (verify_uptodate(index, o))
+                       return -1;
        }
 
        remove_entry(remove);
@@ -856,11 +897,11 @@ int twoway_merge(struct cache_entry **src,
                        /* all other failures */
                        remove_entry(remove);
                        if (oldtree)
-                               reject_merge(oldtree);
+                               return o->gently ? -1 : reject_merge(oldtree);
                        if (current)
-                               reject_merge(current);
+                               return o->gently ? -1 : reject_merge(current);
                        if (newtree)
-                               reject_merge(newtree);
+                               return o->gently ? -1 : reject_merge(newtree);
                        return -1;
                }
        }
@@ -887,7 +928,8 @@ int bind_merge(struct cache_entry **src,
                return error("Cannot do a bind merge of %d trees\n",
                             o->merge_size);
        if (a && old)
-               die("Entry '%s' overlaps.  Cannot bind.", a->name);
+               return o->gently ? -1 :
+                       error("Entry '%s' overlaps.  Cannot bind.", a->name);
        if (!a)
                return keep_entry(old, o);
        else