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#ifndef BRANCH_H
#define BRANCH_H
 
struct repository;
struct strbuf;
 
enum branch_track {
	BRANCH_TRACK_UNSPECIFIED = -1,
	BRANCH_TRACK_NEVER = 0,
	BRANCH_TRACK_REMOTE,
	BRANCH_TRACK_ALWAYS,
	BRANCH_TRACK_EXPLICIT,
	BRANCH_TRACK_OVERRIDE
};
 
extern enum branch_track git_branch_track;
 
/* Functions for acting on the information about branches. */
 
/*
 * Creates a new branch, where:
 *
 *   - r is the repository to add a branch to
 *
 *   - 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
 *
 *   - clobber_head_ok allows the currently checked out (hence existing)
 *     branch to be overwritten; without 'force', it has no effect.
 *
 *   - reflog creates a reflog for the branch
 *
 *   - quiet suppresses tracking information
 *
 *   - 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(struct repository *r,
		   const char *name, const char *start_name,
		   int force, int clobber_head_ok,
		   int reflog, int quiet, enum branch_track track);
 
/*
 * Check if 'name' can be a valid name for a branch; die otherwise.
 * Return 1 if the named branch already exists; return 0 otherwise.
 * Fill ref with the full refname for the branch.
 */
int validate_branchname(const char *name, struct strbuf *ref);
 
/*
 * Check if a branch 'name' can be created as a new branch; die otherwise.
 * 'force' can be used when it is OK for the named branch already exists.
 * Return 1 if the named branch already exists; return 0 otherwise.
 * Fill ref with the full refname for the branch.
 */
int validate_new_branchname(const char *name, struct strbuf *ref, int force);
 
/*
 * Remove information about the state of working on the current
 * branch. (E.g., MERGE_HEAD)
 */
void remove_branch_state(struct repository *r);
 
/*
 * Configure local branch "local" as downstream to branch "remote"
 * from remote "origin".  Used by git branch --set-upstream.
 * Returns 0 on success.
 */
#define BRANCH_CONFIG_VERBOSE 01
int install_branch_config(int flag, const char *local, const char *origin, const char *remote);
 
/*
 * Read branch description
 */
int read_branch_desc(struct strbuf *, const char *branch_name);
 
/*
 * Check if a branch is checked out in the main worktree or any linked
 * worktree and die (with a message describing its checkout location) if
 * it is.
 */
void die_if_checked_out(const char *branch, int ignore_current_worktree);
 
/*
 * Update all per-worktree HEADs pointing at the old ref to point the new ref.
 * This will be used when renaming a branch. Returns 0 if successful, non-zero
 * otherwise.
 */
int replace_each_worktree_head_symref(const char *oldref, const char *newref,
					     const char *logmsg);
 
#endif