Merge branch 'db/checkout'

* db/checkout: (21 commits)
  checkout: error out when index is unmerged even with -m
  checkout: show progress when checkout takes long time while switching branches
  Add merge-subtree back
  checkout: updates to tracking report
  builtin-checkout.c: Remove unused prefix arguments in switch_branches path
  checkout: work from a subdirectory
  checkout: tone down the "forked status" diagnostic messages
  Clean up reporting differences on branch switch
  builtin-checkout.c: fix possible usage segfault
  checkout: notice when the switched branch is behind or forked
  Build in checkout
  Move code to clean up after a branch change to branch.c
  Library function to check for unmerged index entries
  Use diff -u instead of diff in t7201
  Move create_branch into a library file
  Build-in merge-recursive
  Add "skip_unmerged" option to unpack_trees.
  Discard "deleted" cache entries after using them to update the working tree
  Send unpack-trees debugging output to stderr
  Add flag to make unpack_trees() not print errors.
  ...

Conflicts:

	Makefile

1 files changed, 24 insertions, 0 deletions

diff --git a/branch.h b/branch.h
new file mode 100644
index 0000000000..d30abe0369
--- /dev/null
+++ b/branch.h
@@ -0,0 +1,24 @@
+#ifndef BRANCH_H
+#define BRANCH_H
+
+/* Functions for acting on the information about branches. */
+
+/*
+ * Creates a new branch, where head is the branch currently checked
+ * out, name is the new branch name, start_name is the name of the
+ * existing branch that the new branch should start from, force
+ * enables overwriting an existing (non-head) branch, reflog creates a
+ * reflog for the branch, and track causes the new branch to be
+ * configured to merge the remote branch that start_name is a tracking
+ * branch for (if any).
+ */
+void create_branch(const char *head, const char *name, const char *start_name,
+		   int force, int reflog, int track);
+
+/*
+ * Remove information about the state of working on the current
+ * branch. (E.g., MERGE_HEAD)
+ */
+void remove_branch_state(void);
+
+#endif