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[thirdparty/git.git] / unpack-trees.c

diff --git a/unpack-trees.c b/unpack-trees.c
index 7a6df99d10e1dbabc9f7df74316fd91bd55c1fd5..3a8ee19fe837aae6939c3a6b902f6b067dcde9e4 100644 (file)
--- a/unpack-trees.c
+++ b/unpack-trees.c
@@ -52,6 +52,41 @@ static const char *unpack_plumbing_errors[NB_UNPACK_TREES_ERROR_TYPES] = {
          ? ((o)->msgs[(type)])      \
          : (unpack_plumbing_errors[(type)]) )
 
+static const char *super_prefixed(const char *path)
+{
+       /*
+        * It is necessary and sufficient to have two static buffers
+        * here, as the return value of this function is fed to
+        * error() using the unpack_*_errors[] templates we see above.
+        */
+       static struct strbuf buf[2] = {STRBUF_INIT, STRBUF_INIT};
+       static int super_prefix_len = -1;
+       static unsigned idx = ARRAY_SIZE(buf) - 1;
+
+       if (super_prefix_len < 0) {
+               const char *super_prefix = get_super_prefix();
+               if (!super_prefix) {
+                       super_prefix_len = 0;
+               } else {
+                       int i;
+                       for (i = 0; i < ARRAY_SIZE(buf); i++)
+                               strbuf_addstr(&buf[i], super_prefix);
+                       super_prefix_len = buf[0].len;
+               }
+       }
+
+       if (!super_prefix_len)
+               return path;
+
+       if (++idx >= ARRAY_SIZE(buf))
+               idx = 0;
+
+       strbuf_setlen(&buf[idx], super_prefix_len);
+       strbuf_addstr(&buf[idx], path);
+
+       return buf[idx].buf;
+}
+
 void setup_unpack_trees_porcelain(struct unpack_trees_options *opts,
                                  const char *cmd)
 {
@@ -172,7 +207,7 @@ static int add_rejected_path(struct unpack_trees_options *o,
                             const char *path)
 {
        if (!o->show_all_errors)
-               return error(ERRORMSG(o, e), path);
+               return error(ERRORMSG(o, e), super_prefixed(path));
 
        /*
         * Otherwise, insert in a list for future display by
@@ -196,7 +231,7 @@ static void display_error_msgs(struct unpack_trees_options *o)
                        something_displayed = 1;
                        for (i = 0; i < rejects->nr; i++)
                                strbuf_addf(&path, "\t%s\n", rejects->items[i].string);
-                       error(ERRORMSG(o, e), path.buf);
+                       error(ERRORMSG(o, e), super_prefixed(path.buf));
                        strbuf_release(&path);
                }
                string_list_clear(rejects, 0);
@@ -218,29 +253,42 @@ static void unlink_entry(const struct cache_entry *ce)
        schedule_dir_for_removal(ce->name, ce_namelen(ce));
 }
 
-static int check_updates(struct unpack_trees_options *o,
-                        const struct checkout *state)
+static struct progress *get_progress(struct unpack_trees_options *o)
 {
        unsigned cnt = 0, total = 0;
+       struct index_state *index = &o->result;
+
+       if (!o->update || !o->verbose_update)
+               return NULL;
+
+       for (; cnt < index->cache_nr; cnt++) {
+               const struct cache_entry *ce = index->cache[cnt];
+               if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE))
+                       total++;
+       }
+
+       return start_progress_delay(_("Checking out files"),
+                                   total, 50, 1);
+}
+
+static int check_updates(struct unpack_trees_options *o)
+{
+       unsigned cnt = 0;
+       int errs = 0;
        struct progress *progress = NULL;
        struct index_state *index = &o->result;
+       struct checkout state = CHECKOUT_INIT;
        int i;
-       int errs = 0;
 
-       if (o->update && o->verbose_update) {
-               for (total = cnt = 0; cnt < index->cache_nr; cnt++) {
-                       const struct cache_entry *ce = index->cache[cnt];
-                       if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE))
-                               total++;
-               }
+       state.force = 1;
+       state.quiet = 1;
+       state.refresh_cache = 1;
+       state.istate = index;
 
-               progress = start_progress_delay(_("Checking out files"),
-                                               total, 50, 1);
-               cnt = 0;
-       }
+       progress = get_progress(o);
 
        if (o->update)
-               git_attr_set_direction(GIT_ATTR_CHECKOUT, &o->result);
+               git_attr_set_direction(GIT_ATTR_CHECKOUT, index);
        for (i = 0; i < index->cache_nr; i++) {
                const struct cache_entry *ce = index->cache[i];
 
@@ -248,10 +296,9 @@ static int check_updates(struct unpack_trees_options *o,
                        display_progress(progress, ++cnt);
                        if (o->update && !o->dry_run)
                                unlink_entry(ce);
-                       continue;
                }
        }
-       remove_marked_cache_entries(&o->result);
+       remove_marked_cache_entries(index);
        remove_scheduled_dirs();
 
        for (i = 0; i < index->cache_nr; i++) {
@@ -264,7 +311,7 @@ static int check_updates(struct unpack_trees_options *o,
                        display_progress(progress, ++cnt);
                        ce->ce_flags &= ~CE_UPDATE;
                        if (o->update && !o->dry_run) {
-                               errs |= checkout_entry(ce, state, NULL);
+                               errs |= checkout_entry(ce, &state, NULL);
                        }
                }
        }
@@ -1094,14 +1141,9 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
        int i, ret;
        static struct cache_entry *dfc;
        struct exclude_list el;
-       struct checkout state = CHECKOUT_INIT;
 
        if (len > MAX_UNPACK_TREES)
                die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES);
-       state.force = 1;
-       state.quiet = 1;
-       state.refresh_cache = 1;
-       state.istate = &o->result;
 
        memset(&el, 0, sizeof(el));
        if (!core_apply_sparse_checkout || !o->update)
@@ -1238,7 +1280,7 @@ int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options
        }
 
        o->src_index = NULL;
-       ret = check_updates(o, &state) ? (-2) : 0;
+       ret = check_updates(o) ? (-2) : 0;
        if (o->dst_index) {
                if (!ret) {
                        if (!o->result.cache_tree)
@@ -1918,7 +1960,9 @@ int bind_merge(const struct cache_entry * const *src,
                             o->merge_size);
        if (a && old)
                return o->gently ? -1 :
-                       error(ERRORMSG(o, ERROR_BIND_OVERLAP), a->name, old->name);
+                       error(ERRORMSG(o, ERROR_BIND_OVERLAP),
+                             super_prefixed(a->name),
+                             super_prefixed(old->name));
        if (!a)
                return keep_entry(old, o);
        else