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-rw-r--r--builtin-checkout.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/builtin-checkout.c b/builtin-checkout.c
index 67229fc216..527781728e 100644
--- a/builtin-checkout.c
+++ b/builtin-checkout.c
@@ -17,6 +17,7 @@
#include "blob.h"
#include "xdiff-interface.h"
#include "ll-merge.h"
+#include "resolve-undo.h"
static const char * const checkout_usage[] = {
"git checkout [options] <branch>",
@@ -234,6 +235,10 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec,
if (report_path_error(ps_matched, pathspec, 0))
return 1;
+ /* "checkout -m path" to recreate conflicted state */
+ if (opts->merge)
+ unmerge_cache(pathspec);
+
/* Any unmerged paths? */
for (pos = 0; pos < active_nr; pos++) {
struct cache_entry *ce = active_cache[pos];
@@ -370,6 +375,7 @@ static int merge_working_tree(struct checkout_opts *opts,
if (read_cache_preload(NULL) < 0)
return error("corrupt index file");
+ resolve_undo_clear();
if (opts->force) {
ret = reset_tree(new->commit->tree, opts, 1);
if (ret)
@@ -696,7 +702,10 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
* case 3: git checkout <something> [<paths>]
*
* With no paths, if <something> is a commit, that is to
- * switch to the branch or detach HEAD at it.
+ * switch to the branch or detach HEAD at it. As a special case,
+ * if <something> is A...B (missing A or B means HEAD but you can
+ * omit at most one side), and if there is a unique merge base
+ * between A and B, A...B names that merge base.
*
* With no paths, if <something> is _not_ a commit, no -t nor -b
* was given, and there is a tracking branch whose name is
@@ -722,7 +731,7 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
if (!strcmp(arg, "-"))
arg = "@{-1}";
- if (get_sha1(arg, rev)) {
+ if (get_sha1_mb(arg, rev)) {
if (has_dash_dash) /* case (1) */
die("invalid reference: %s", arg);
if (!patch_mode &&
@@ -749,8 +758,10 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
new.name = arg;
if ((new.commit = lookup_commit_reference_gently(rev, 1))) {
setup_branch_path(&new);
- if (resolve_ref(new.path, rev, 1, NULL))
- new.commit = lookup_commit_reference(rev);
+
+ if ((check_ref_format(new.path) == CHECK_REF_FORMAT_OK) &&
+ resolve_ref(new.path, rev, 1, NULL))
+ ;
else
new.path = NULL;
parse_commit(new.commit);