checkout: tone down the "forked status" diagnostic messages
[gitweb.git] / tree.c
diff --git a/tree.c b/tree.c
index b6f02fecc46ec4633dc1ee75f38bc90761a4fbe3..87708ef420aaa328c9a8dfcefbcf4aa7ba6d4b72 100644 (file)
--- a/tree.c
+++ b/tree.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "cache-tree.h"
 #include "tree.h"
 #include "blob.h"
 #include "commit.h"
@@ -7,7 +8,7 @@
 
 const char *tree_type = "tree";
 
-static int read_one_entry(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
+static int read_one_entry_opt(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, int opt)
 {
        int len;
        unsigned int size;
@@ -25,7 +26,23 @@ static int read_one_entry(const unsigned char *sha1, const char *base, int basel
        memcpy(ce->name, base, baselen);
        memcpy(ce->name + baselen, pathname, len+1);
        hashcpy(ce->sha1, sha1);
-       return add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
+       return add_cache_entry(ce, opt);
+}
+
+static int read_one_entry(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
+{
+       return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage,
+                                 ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
+}
+
+/*
+ * This is used when the caller knows there is no existing entries at
+ * the stage that will conflict with the entry being added.
+ */
+static int read_one_entry_quick(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
+{
+       return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage,
+                                 ADD_CACHE_JUST_APPEND);
 }
 
 static int match_tree_entry(const char *base, int baselen, const char *path, unsigned int mode, const char **paths)
@@ -83,8 +100,7 @@ int read_tree_recursive(struct tree *tree,
        if (parse_tree(tree))
                return -1;
 
-       desc.buf = tree->buffer;
-       desc.size = tree->size;
+       init_tree_desc(&desc, tree->buffer, tree->size);
 
        while (tree_entry(&desc, &entry)) {
                if (!match_tree_entry(base, baselen, entry.path, entry.mode, match))
@@ -101,14 +117,15 @@ int read_tree_recursive(struct tree *tree,
                if (S_ISDIR(entry.mode)) {
                        int retval;
                        char *newbase;
+                       unsigned int pathlen = tree_entry_len(entry.path, entry.sha1);
 
-                       newbase = xmalloc(baselen + 1 + entry.pathlen);
+                       newbase = xmalloc(baselen + 1 + pathlen);
                        memcpy(newbase, base, baselen);
-                       memcpy(newbase + baselen, entry.path, entry.pathlen);
-                       newbase[baselen + entry.pathlen] = '/';
+                       memcpy(newbase + baselen, entry.path, pathlen);
+                       newbase[baselen + pathlen] = '/';
                        retval = read_tree_recursive(lookup_tree(entry.sha1),
                                                     newbase,
-                                                    baselen + entry.pathlen + 1,
+                                                    baselen + pathlen + 1,
                                                     stage, match, fn);
                        free(newbase);
                        if (retval)
@@ -119,20 +136,62 @@ int read_tree_recursive(struct tree *tree,
        return 0;
 }
 
+static int cmp_cache_name_compare(const void *a_, const void *b_)
+{
+       const struct cache_entry *ce1, *ce2;
+
+       ce1 = *((const struct cache_entry **)a_);
+       ce2 = *((const struct cache_entry **)b_);
+       return cache_name_compare(ce1->name, ce1->ce_flags,
+                                 ce2->name, ce2->ce_flags);
+}
+
 int read_tree(struct tree *tree, int stage, const char **match)
 {
-       return read_tree_recursive(tree, "", 0, stage, match, read_one_entry);
+       read_tree_fn_t fn = NULL;
+       int i, err;
+
+       /*
+        * Currently the only existing callers of this function all
+        * call it with stage=1 and after making sure there is nothing
+        * at that stage; we could always use read_one_entry_quick().
+        *
+        * But when we decide to straighten out git-read-tree not to
+        * use unpack_trees() in some cases, this will probably start
+        * to matter.
+        */
+
+       /*
+        * See if we have cache entry at the stage.  If so,
+        * do it the original slow way, otherwise, append and then
+        * sort at the end.
+        */
+       for (i = 0; !fn && i < active_nr; i++) {
+               struct cache_entry *ce = active_cache[i];
+               if (ce_stage(ce) == stage)
+                       fn = read_one_entry;
+       }
+
+       if (!fn)
+               fn = read_one_entry_quick;
+       err = read_tree_recursive(tree, "", 0, stage, match, fn);
+       if (fn == read_one_entry || err)
+               return err;
+
+       /*
+        * Sort the cache entry -- we need to nuke the cache tree, though.
+        */
+       cache_tree_free(&active_cache_tree);
+       qsort(active_cache, active_nr, sizeof(active_cache[0]),
+             cmp_cache_name_compare);
+       return 0;
 }
 
 struct tree *lookup_tree(const unsigned char *sha1)
 {
        struct object *obj = lookup_object(sha1);
-       if (!obj) {
-               struct tree *ret = alloc_tree_node();
-               created_object(sha1, &ret->object);
-               ret->object.type = OBJ_TREE;
-               return ret;
-       }
+       if (!obj)
+               return create_object(sha1, OBJ_TREE, alloc_tree_node());
        if (!obj->type)
                obj->type = OBJ_TREE;
        if (obj->type != OBJ_TREE) {
@@ -143,6 +202,14 @@ struct tree *lookup_tree(const unsigned char *sha1)
        return (struct tree *) obj;
 }
 
+/*
+ * NOTE! Tree refs to external git repositories
+ * (ie gitlinks) do not count as real references.
+ *
+ * You don't have to have those repositories
+ * available at all, much less have the objects
+ * accessible from the current repository.
+ */
 static void track_tree_refs(struct tree *item)
 {
        int n_refs = 0, i;
@@ -151,25 +218,31 @@ static void track_tree_refs(struct tree *item)
        struct name_entry entry;
 
        /* Count how many entries there are.. */
-       desc.buf = item->buffer;
-       desc.size = item->size;
-       while (desc.size) {
+       init_tree_desc(&desc, item->buffer, item->size);
+       while (tree_entry(&desc, &entry)) {
+               if (S_ISGITLINK(entry.mode))
+                       continue;
                n_refs++;
-               update_tree_entry(&desc);
        }
 
        /* Allocate object refs and walk it again.. */
        i = 0;
        refs = alloc_object_refs(n_refs);
-       desc.buf = item->buffer;
-       desc.size = item->size;
+       init_tree_desc(&desc, item->buffer, item->size);
        while (tree_entry(&desc, &entry)) {
                struct object *obj;
 
+               if (S_ISGITLINK(entry.mode))
+                       continue;
                if (S_ISDIR(entry.mode))
                        obj = &lookup_tree(entry.sha1)->object;
-               else
+               else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode))
                        obj = &lookup_blob(entry.sha1)->object;
+               else {
+                       warning("in tree %s: entry %s has bad mode %.6o\n",
+                            sha1_to_hex(item->object.sha1), entry.path, entry.mode);
+                       obj = lookup_unknown_object(entry.sha1);
+               }
                refs->ref[i++] = obj;
        }
        set_object_refs(&item->object, refs);
@@ -190,17 +263,17 @@ int parse_tree_buffer(struct tree *item, void *buffer, unsigned long size)
 
 int parse_tree(struct tree *item)
 {
-        char type[20];
+        enum object_type type;
         void *buffer;
         unsigned long size;
 
        if (item->object.parsed)
                return 0;
-       buffer = read_sha1_file(item->object.sha1, type, &size);
+       buffer = read_sha1_file(item->object.sha1, &type, &size);
        if (!buffer)
                return error("Could not read %s",
                             sha1_to_hex(item->object.sha1));
-       if (strcmp(type, tree_type)) {
+       if (type != OBJ_TREE) {
                free(buffer);
                return error("Object %s not a tree",
                             sha1_to_hex(item->object.sha1));