#include "progress.h"
#include "refs.h"
+/*
+ * Error messages expected by scripts out of plumbing commands such as
+ * read-tree. Non-scripted Porcelain is not required to use these messages
+ * and in fact are encouraged to reword them to better suit their particular
+ * situation better. See how "git checkout" replaces not_uptodate_file to
+ * explain why it does not allow switching between branches when you have
+ * local changes, for example.
+ */
+static struct unpack_trees_error_msgs unpack_plumbing_errors = {
+ /* would_overwrite */
+ "Entry '%s' would be overwritten by merge. Cannot merge.",
+
+ /* not_uptodate_file */
+ "Entry '%s' not uptodate. Cannot merge.",
+
+ /* not_uptodate_dir */
+ "Updating '%s' would lose untracked files in it",
+
+ /* would_lose_untracked */
+ "Untracked working tree file '%s' would be %s by merge.",
+
+ /* bind_overlap */
+ "Entry '%s' overlaps with '%s'. Cannot bind.",
+};
+
+#define ERRORMSG(o,fld) \
+ ( ((o) && (o)->msgs.fld) \
+ ? ((o)->msgs.fld) \
+ : (unpack_plumbing_errors.fld) )
+
static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce,
unsigned int set, unsigned int clear)
{
* directories, in case this unlink is the removal of the
* last entry in the directory -- empty directories are removed.
*/
-static void unlink_entry(char *name, char *last_symlink)
+static void unlink_entry(struct cache_entry *ce)
{
char *cp, *prev;
+ char *name = ce->name;
- if (has_symlink_leading_path(name, last_symlink))
+ if (has_symlink_leading_path(ce_namelen(ce), ce->name))
return;
if (unlink(name))
return;
{
unsigned cnt = 0, total = 0;
struct progress *progress = NULL;
- char last_symlink[PATH_MAX];
struct index_state *index = &o->result;
int i;
int errs = 0;
cnt = 0;
}
- *last_symlink = '\0';
for (i = 0; i < index->cache_nr; i++) {
struct cache_entry *ce = index->cache[i];
- if (ce->ce_flags & (CE_UPDATE | CE_REMOVE))
- display_progress(progress, ++cnt);
if (ce->ce_flags & CE_REMOVE) {
+ display_progress(progress, ++cnt);
if (o->update)
- unlink_entry(ce->name, last_symlink);
+ unlink_entry(ce);
remove_index_entry_at(&o->result, i);
i--;
continue;
}
+ }
+
+ for (i = 0; i < index->cache_nr; i++) {
+ struct cache_entry *ce = index->cache[i];
+
if (ce->ce_flags & CE_UPDATE) {
+ display_progress(progress, ++cnt);
ce->ce_flags &= ~CE_UPDATE;
if (o->update) {
errs |= checkout_entry(ce, &state, NULL);
- *last_symlink = '\0';
}
}
}
return -1;
}
+/*
+ * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the
+ * resulting index, -2 on failure to reflect the changes to the work tree.
+ */
int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o)
{
+ int ret;
static struct cache_entry *dfc;
if (len > MAX_UNPACK_TREES)
state.refresh_cache = 1;
memset(&o->result, 0, sizeof(o->result));
+ o->result.initialized = 1;
if (o->src_index)
o->result.timestamp = o->src_index->timestamp;
o->merge_size = len;
return unpack_failed(o, "Merge requires file-level merging");
o->src_index = NULL;
- if (check_updates(o))
- return -1;
+ ret = check_updates(o) ? (-2) : 0;
if (o->dst_index)
*o->dst_index = o->result;
- return 0;
+ return ret;
}
/* Here come the merge functions */
-static int reject_merge(struct cache_entry *ce)
+static int reject_merge(struct cache_entry *ce, struct unpack_trees_options *o)
{
- return error("Entry '%s' would be overwritten by merge. Cannot merge.",
- ce->name);
+ return error(ERRORMSG(o, would_overwrite), ce->name);
}
static int same(struct cache_entry *a, struct cache_entry *b)
if (errno == ENOENT)
return 0;
return o->gently ? -1 :
- error("Entry '%s' not uptodate. Cannot merge.", ce->name);
+ error(ERRORMSG(o, not_uptodate_file), ce->name);
}
static void invalidate_ce_path(struct cache_entry *ce, struct unpack_trees_options *o)
i = read_directory(&d, ce->name, pathbuf, namelen+1, NULL);
if (i)
return o->gently ? -1 :
- error("Updating '%s' would lose untracked files in it",
- ce->name);
+ error(ERRORMSG(o, not_uptodate_dir), ce->name);
free(pathbuf);
return cnt;
}
+/*
+ * This gets called when there was no index entry for the tree entry 'dst',
+ * but we found a file in the working tree that 'lstat()' said was fine,
+ * and we're on a case-insensitive filesystem.
+ *
+ * See if we can find a case-insensitive match in the index that also
+ * matches the stat information, and assume it's that other file!
+ */
+static int icase_exists(struct unpack_trees_options *o, struct cache_entry *dst, struct stat *st)
+{
+ struct cache_entry *src;
+
+ src = index_name_exists(o->src_index, dst->name, ce_namelen(dst), 1);
+ return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID);
+}
+
/*
* We do not want to remove or overwrite a working tree file that
* is not tracked, unless it is ignored.
if (o->index_only || o->reset || !o->update)
return 0;
- if (has_symlink_leading_path(ce->name, NULL))
+ if (has_symlink_leading_path(ce_namelen(ce), ce->name))
return 0;
if (!lstat(ce->name, &st)) {
int dtype = ce_to_dtype(ce);
struct cache_entry *result;
+ /*
+ * It may be that the 'lstat()' succeeded even though
+ * target 'ce' was absent, because there is an old
+ * entry that is different only in case..
+ *
+ * Ignore that lstat() if it matches.
+ */
+ if (ignore_case && icase_exists(o, ce, &st))
+ return 0;
+
if (o->dir && excluded(o->dir, ce->name, &dtype))
/*
* ce->name is explicitly excluded, so it is Ok to
}
return o->gently ? -1 :
- error("Untracked working tree file '%s' "
- "would be %s by merge.", ce->name, action);
+ error(ERRORMSG(o, would_lose_untracked), ce->name, action);
}
return 0;
}
/* #14, #14ALT, #2ALT */
if (remote && !df_conflict_head && head_match && !remote_match) {
if (index && !same(index, remote) && !same(index, head))
- return o->gently ? -1 : reject_merge(index);
+ return o->gently ? -1 : reject_merge(index, o);
return merged_entry(remote, index, o);
}
/*
* make sure that it matches head.
*/
if (index && !same(index, head))
- return o->gently ? -1 : reject_merge(index);
+ return o->gently ? -1 : reject_merge(index, o);
if (head) {
/* #5ALT, #15 */
else {
/* all other failures */
if (oldtree)
- return o->gently ? -1 : reject_merge(oldtree);
+ return o->gently ? -1 : reject_merge(oldtree, o);
if (current)
- return o->gently ? -1 : reject_merge(current);
+ return o->gently ? -1 : reject_merge(current, o);
if (newtree)
- return o->gently ? -1 : reject_merge(newtree);
+ return o->gently ? -1 : reject_merge(newtree, o);
return -1;
}
}
- else if (newtree)
+ else if (newtree) {
+ if (oldtree && !o->initial_checkout) {
+ /*
+ * deletion of the path was staged;
+ */
+ if (same(oldtree, newtree))
+ return 1;
+ return reject_merge(oldtree, o);
+ }
return merged_entry(newtree, current, o);
+ }
return deleted_entry(oldtree, current, o);
}
o->merge_size);
if (a && old)
return o->gently ? -1 :
- error("Entry '%s' overlaps with '%s'. Cannot bind.", a->name, old->name);
+ error(ERRORMSG(o, bind_overlap), a->name, old->name);
if (!a)
return keep_entry(old, o);
else