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 /*
  * Copyright (C) the libgit2 contributors. All rights reserved.
  *
  * This file is part of libgit2, distributed under the GNU GPL v2 with
  * a Linking Exception. For full terms see the included COPYING file.
  */
 #ifndef INCLUDE_git_submodule_h__
 #define INCLUDE_git_submodule_h__
 
 #include "common.h"
 #include "types.h"
 #include "oid.h"
 #include "remote.h"
 #include "checkout.h"
 
 /**
  * @file git2/submodule.h
  * @brief Git submodule management utilities
  *
  * Submodule support in libgit2 builds a list of known submodules and keeps
  * it in the repository.  The list is built from the .gitmodules file, the
  * .git/config file, the index, and the HEAD tree.  Items in the working
  * directory that look like submodules (i.e. a git repo) but are not
  * mentioned in those places won't be tracked.
  *
  * @defgroup git_submodule Git submodule management routines
  * @ingroup Git
  * @{
  */
 GIT_BEGIN_DECL
 
 /**
  * Return codes for submodule status.
  *
  * A combination of these flags will be returned to describe the status of a
  * submodule.  Depending on the "ignore" property of the submodule, some of
  * the flags may never be returned because they indicate changes that are
  * supposed to be ignored.
  *
  * Submodule info is contained in 4 places: the HEAD tree, the index, config
  * files (both .git/config and .gitmodules), and the working directory.  Any
  * or all of those places might be missing information about the submodule
  * depending on what state the repo is in.  We consider all four places to
  * build the combination of status flags.
  *
  * There are four values that are not really status, but give basic info
  * about what sources of submodule data are available.  These will be
  * returned even if ignore is set to "ALL".
  *
  * * IN_HEAD   - superproject head contains submodule
  * * IN_INDEX  - superproject index contains submodule
  * * IN_CONFIG - superproject gitmodules has submodule
  * * IN_WD     - superproject workdir has submodule
  *
  * The following values will be returned so long as ignore is not "ALL".
  *
  * * INDEX_ADDED       - in index, not in head
  * * INDEX_DELETED     - in head, not in index
  * * INDEX_MODIFIED    - index and head don't match
  * * WD_UNINITIALIZED  - workdir contains empty directory
  * * WD_ADDED          - in workdir, not index
  * * WD_DELETED        - in index, not workdir
  * * WD_MODIFIED       - index and workdir head don't match
  *
  * The following can only be returned if ignore is "NONE" or "UNTRACKED".
  *
  * * WD_INDEX_MODIFIED - submodule workdir index is dirty
  * * WD_WD_MODIFIED    - submodule workdir has modified files
  *
  * Lastly, the following will only be returned for ignore "NONE".
  *
  * * WD_UNTRACKED      - wd contains untracked files
  */
 typedef enum {
     GIT_SUBMODULE_STATUS_IN_HEAD           = (1u << 0),
     GIT_SUBMODULE_STATUS_IN_INDEX          = (1u << 1),
     GIT_SUBMODULE_STATUS_IN_CONFIG         = (1u << 2),
     GIT_SUBMODULE_STATUS_IN_WD             = (1u << 3),
     GIT_SUBMODULE_STATUS_INDEX_ADDED       = (1u << 4),
     GIT_SUBMODULE_STATUS_INDEX_DELETED     = (1u << 5),
     GIT_SUBMODULE_STATUS_INDEX_MODIFIED    = (1u << 6),
     GIT_SUBMODULE_STATUS_WD_UNINITIALIZED  = (1u << 7),
     GIT_SUBMODULE_STATUS_WD_ADDED          = (1u << 8),
     GIT_SUBMODULE_STATUS_WD_DELETED        = (1u << 9),
     GIT_SUBMODULE_STATUS_WD_MODIFIED       = (1u << 10),
     GIT_SUBMODULE_STATUS_WD_INDEX_MODIFIED = (1u << 11),
     GIT_SUBMODULE_STATUS_WD_WD_MODIFIED    = (1u << 12),
     GIT_SUBMODULE_STATUS_WD_UNTRACKED      = (1u << 13)
 } git_submodule_status_t;
 
 #define GIT_SUBMODULE_STATUS__IN_FLAGS      0x000Fu
 #define GIT_SUBMODULE_STATUS__INDEX_FLAGS   0x0070u
 #define GIT_SUBMODULE_STATUS__WD_FLAGS      0x3F80u
 
 #define GIT_SUBMODULE_STATUS_IS_UNMODIFIED(S) \
     (((S) & ~GIT_SUBMODULE_STATUS__IN_FLAGS) == 0)
 
 #define GIT_SUBMODULE_STATUS_IS_INDEX_UNMODIFIED(S) \
     (((S) & GIT_SUBMODULE_STATUS__INDEX_FLAGS) == 0)
 
 #define GIT_SUBMODULE_STATUS_IS_WD_UNMODIFIED(S) \
     (((S) & (GIT_SUBMODULE_STATUS__WD_FLAGS & \
     ~GIT_SUBMODULE_STATUS_WD_UNINITIALIZED)) == 0)
 
 #define GIT_SUBMODULE_STATUS_IS_WD_DIRTY(S) \
     (((S) & (GIT_SUBMODULE_STATUS_WD_INDEX_MODIFIED | \
     GIT_SUBMODULE_STATUS_WD_WD_MODIFIED | \
     GIT_SUBMODULE_STATUS_WD_UNTRACKED)) != 0)
 
 /**
  * Function pointer to receive each submodule
  *
  * @param sm git_submodule currently being visited
  * @param name name of the submodule
  * @param payload value you passed to the foreach function as payload
  * @return 0 on success or error code
  */
 typedef int GIT_CALLBACK(git_submodule_cb)(
     git_submodule *sm, const char *name, void *payload);
 
 /**
  * Submodule update options structure
  *
  * Initialize with `GIT_SUBMODULE_UPDATE_OPTIONS_INIT`. Alternatively, you can
  * use `git_submodule_update_options_init`.
  *
  */
 typedef struct git_submodule_update_options {
     unsigned int version;
 
     /**
      * These options are passed to the checkout step. To disable
      * checkout, set the `checkout_strategy` to
      * `GIT_CHECKOUT_NONE`. Generally you will want the use
      * GIT_CHECKOUT_SAFE to update files in the working
      * directory.
      */
     git_checkout_options checkout_opts;
 
     /**
      * Options which control the fetch, including callbacks.
      *
      * The callbacks to use for reporting fetch progress, and for acquiring
      * credentials in the event they are needed.
      */
     git_fetch_options fetch_opts;
 
     /**
      * Allow fetching from the submodule's default remote if the target
      * commit isn't found. Enabled by default.
      */
     int allow_fetch;
 } git_submodule_update_options;
 
 #define GIT_SUBMODULE_UPDATE_OPTIONS_VERSION 1
 #define GIT_SUBMODULE_UPDATE_OPTIONS_INIT \
     { GIT_SUBMODULE_UPDATE_OPTIONS_VERSION, \
         { GIT_CHECKOUT_OPTIONS_VERSION, GIT_CHECKOUT_SAFE }, \
     GIT_FETCH_OPTIONS_INIT, 1 }
 
 /**
  * Initialize git_submodule_update_options structure
  *
  * Initializes a `git_submodule_update_options` with default values. Equivalent to
  * creating an instance with `GIT_SUBMODULE_UPDATE_OPTIONS_INIT`.
  *
  * @param opts The `git_submodule_update_options` struct to initialize.
  * @param version The struct version; pass `GIT_SUBMODULE_UPDATE_OPTIONS_VERSION`.
  * @return Zero on success; -1 on failure.
  */
 GIT_EXTERN(int) git_submodule_update_options_init(
     git_submodule_update_options *opts, unsigned int version);
 
 /**
  * Update a submodule. This will clone a missing submodule and
  * checkout the subrepository to the commit specified in the index of
  * the containing repository. If the submodule repository doesn't contain
  * the target commit (e.g. because fetchRecurseSubmodules isn't set), then
  * the submodule is fetched using the fetch options supplied in options.
  *
  * @param submodule Submodule object
  * @param init If the submodule is not initialized, setting this flag to true
  *        will initialize the submodule before updating. Otherwise, this will
  *        return an error if attempting to update an uninitialized repository.
  *        but setting this to true forces them to be updated.
  * @param options configuration options for the update.  If NULL, the
  *        function works as though GIT_SUBMODULE_UPDATE_OPTIONS_INIT was passed.
  * @return 0 on success, any non-zero return value from a callback
  *         function, or a negative value to indicate an error (use
  *         `git_error_last` for a detailed error message).
  */
 GIT_EXTERN(int) git_submodule_update(git_submodule *submodule, int init, git_submodule_update_options *options);
 
 /**
  * Lookup submodule information by name or path.
  *
  * Given either the submodule name or path (they are usually the same), this
  * returns a structure describing the submodule.
  *
  * There are two expected error scenarios:
  *
  * - The submodule is not mentioned in the HEAD, the index, and the config,
  *   but does "exist" in the working directory (i.e. there is a subdirectory
  *   that appears to be a Git repository).  In this case, this function
  *   returns GIT_EEXISTS to indicate a sub-repository exists but not in a
  *   state where a git_submodule can be instantiated.
  * - The submodule is not mentioned in the HEAD, index, or config and the
  *   working directory doesn't contain a value git repo at that path.
  *   There may or may not be anything else at that path, but nothing that
  *   looks like a submodule.  In this case, this returns GIT_ENOTFOUND.
  *
  * You must call `git_submodule_free` when done with the submodule.
  *
  * @param out Output ptr to submodule; pass NULL to just get return code
  * @param repo The parent repository
  * @param name The name of or path to the submodule; trailing slashes okay
  * @return 0 on success, GIT_ENOTFOUND if submodule does not exist,
  *         GIT_EEXISTS if a repository is found in working directory only,
  *         -1 on other errors.
  */
 GIT_EXTERN(int) git_submodule_lookup(
     git_submodule **out,
     git_repository *repo,
     const char *name);
 
 /**
  * Create an in-memory copy of a submodule. The copy must be explicitly
  * free'd or it will leak.
  *
  * @param out Pointer to store the copy of the submodule.
  * @param source Original submodule to copy.
  * @return 0
  */
 GIT_EXTERN(int) git_submodule_dup(git_submodule **out, git_submodule *source);
 
 /**
  * Release a submodule
  *
  * @param submodule Submodule object
  */
 GIT_EXTERN(void) git_submodule_free(git_submodule *submodule);
 
 /**
  * Iterate over all tracked submodules of a repository.
  *
  * See the note on `git_submodule` above.  This iterates over the tracked
  * submodules as described therein.
  *
  * If you are concerned about items in the working directory that look like
  * submodules but are not tracked, the diff API will generate a diff record
  * for workdir items that look like submodules but are not tracked, showing
  * them as added in the workdir.  Also, the status API will treat the entire
  * subdirectory of a contained git repo as a single GIT_STATUS_WT_NEW item.
  *
  * @param repo The repository
  * @param callback Function to be called with the name of each submodule.
  *        Return a non-zero value to terminate the iteration.
  * @param payload Extra data to pass to callback
  * @return 0 on success, -1 on error, or non-zero return value of callback
  */
 GIT_EXTERN(int) git_submodule_foreach(
     git_repository *repo,
     git_submodule_cb callback,
     void *payload);
 
 /**
  * Set up a new git submodule for checkout.
  *
  * This does "git submodule add" up to the fetch and checkout of the
  * submodule contents.  It preps a new submodule, creates an entry in
  * .gitmodules and creates an empty initialized repository either at the
  * given path in the working directory or in .git/modules with a gitlink
  * from the working directory to the new repo.
  *
  * To fully emulate "git submodule add" call this function, then open the
  * submodule repo and perform the clone step as needed (if you don't need
  * anything custom see `git_submodule_add_clone()`). Lastly, call
  * `git_submodule_add_finalize()` to wrap up adding the new submodule and
  * .gitmodules to the index to be ready to commit.
  *
  * You must call `git_submodule_free` on the submodule object when done.
  *
  * @param out The newly created submodule ready to open for clone
  * @param repo The repository in which you want to create the submodule
  * @param url URL for the submodule's remote
  * @param path Path at which the submodule should be created
  * @param use_gitlink Should workdir contain a gitlink to the repo in
  *        .git/modules vs. repo directly in workdir.
  * @return 0 on success, GIT_EEXISTS if submodule already exists,
  *         -1 on other errors.
  */
 GIT_EXTERN(int) git_submodule_add_setup(
     git_submodule **out,
     git_repository *repo,
     const char *url,
     const char *path,
     int use_gitlink);
 
 /**
  * Perform the clone step for a newly created submodule.
  *
  * This performs the necessary `git_clone` to setup a newly-created submodule.
  *
  * @param out The newly created repository object. Optional.
  * @param submodule The submodule currently waiting for its clone.
  * @param opts The options to use.
  *
  * @return 0 on success, -1 on other errors (see git_clone).
  */
 GIT_EXTERN(int) git_submodule_clone(
     git_repository **out,
     git_submodule *submodule,
     const git_submodule_update_options *opts);
 
 /**
  * Resolve the setup of a new git submodule.
  *
  * This should be called on a submodule once you have called add setup
  * and done the clone of the submodule.  This adds the .gitmodules file
  * and the newly cloned submodule to the index to be ready to be committed
  * (but doesn't actually do the commit).
  *
  * @param submodule The submodule to finish adding.
  * @return 0 or an error code.
  */
 GIT_EXTERN(int) git_submodule_add_finalize(git_submodule *submodule);
 
 /**
  * Add current submodule HEAD commit to index of superproject.
  *
  * @param submodule The submodule to add to the index
  * @param write_index Boolean if this should immediately write the index
  *            file.  If you pass this as false, you will have to get the
  *            git_index and explicitly call `git_index_write()` on it to
  *            save the change.
  * @return 0 on success, <0 on failure
  */
 GIT_EXTERN(int) git_submodule_add_to_index(
     git_submodule *submodule,
     int write_index);
 
 /**
  * Get the containing repository for a submodule.
  *
  * This returns a pointer to the repository that contains the submodule.
  * This is a just a reference to the repository that was passed to the
  * original `git_submodule_lookup()` call, so if that repository has been
  * freed, then this may be a dangling reference.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to `git_repository`
  */
 GIT_EXTERN(git_repository *) git_submodule_owner(git_submodule *submodule);
 
 /**
  * Get the name of submodule.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to the submodule name
  */
 GIT_EXTERN(const char *) git_submodule_name(git_submodule *submodule);
 
 /**
  * Get the path to the submodule.
  *
  * The path is almost always the same as the submodule name, but the
  * two are actually not required to match.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to the submodule path
  */
 GIT_EXTERN(const char *) git_submodule_path(git_submodule *submodule);
 
 /**
  * Get the URL for the submodule.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to the submodule url
  */
 GIT_EXTERN(const char *) git_submodule_url(git_submodule *submodule);
 
 /**
  * Resolve a submodule url relative to the given repository.
  *
  * @param out buffer to store the absolute submodule url in
  * @param repo Pointer to repository object
  * @param url Relative url
  * @return 0 or an error code
  */
 GIT_EXTERN(int) git_submodule_resolve_url(git_buf *out, git_repository *repo, const char *url);
 
 /**
 * Get the branch for the submodule.
 *
 * @param submodule Pointer to submodule object
 * @return Pointer to the submodule branch
 */
 GIT_EXTERN(const char *) git_submodule_branch(git_submodule *submodule);
 
 /**
  * Set the branch for the submodule in the configuration
  *
  * After calling this, you may wish to call `git_submodule_sync()` to
  * write the changes to the checked out submodule repository.
  *
  * @param repo the repository to affect
  * @param name the name of the submodule to configure
  * @param branch Branch that should be used for the submodule
  * @return 0 on success, <0 on failure
  */
 GIT_EXTERN(int) git_submodule_set_branch(git_repository *repo, const char *name, const char *branch);
 
 /**
  * Set the URL for the submodule in the configuration
  *
  *
  * After calling this, you may wish to call `git_submodule_sync()` to
  * write the changes to the checked out submodule repository.
  *
  * @param repo the repository to affect
  * @param name the name of the submodule to configure
  * @param url URL that should be used for the submodule
  * @return 0 on success, <0 on failure
  */
 GIT_EXTERN(int) git_submodule_set_url(git_repository *repo, const char *name, const char *url);
 
 /**
  * Get the OID for the submodule in the index.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to git_oid or NULL if submodule is not in index.
  */
 GIT_EXTERN(const git_oid *) git_submodule_index_id(git_submodule *submodule);
 
 /**
  * Get the OID for the submodule in the current HEAD tree.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to git_oid or NULL if submodule is not in the HEAD.
  */
 GIT_EXTERN(const git_oid *) git_submodule_head_id(git_submodule *submodule);
 
 /**
  * Get the OID for the submodule in the current working directory.
  *
  * This returns the OID that corresponds to looking up 'HEAD' in the checked
  * out submodule.  If there are pending changes in the index or anything
  * else, this won't notice that.  You should call `git_submodule_status()`
  * for a more complete picture about the state of the working directory.
  *
  * @param submodule Pointer to submodule object
  * @return Pointer to git_oid or NULL if submodule is not checked out.
  */
 GIT_EXTERN(const git_oid *) git_submodule_wd_id(git_submodule *submodule);
 
 /**
  * Get the ignore rule that will be used for the submodule.
  *
  * These values control the behavior of `git_submodule_status()` for this
  * submodule.  There are four ignore values:
  *
  *  - **GIT_SUBMODULE_IGNORE_NONE** will consider any change to the contents
  *    of the submodule from a clean checkout to be dirty, including the
  *    addition of untracked files.  This is the default if unspecified.
  *  - **GIT_SUBMODULE_IGNORE_UNTRACKED** examines the contents of the
  *    working tree (i.e. call `git_status_foreach()` on the submodule) but
  *    UNTRACKED files will not count as making the submodule dirty.
  *  - **GIT_SUBMODULE_IGNORE_DIRTY** means to only check if the HEAD of the
  *    submodule has moved for status.  This is fast since it does not need to
  *    scan the working tree of the submodule at all.
  *  - **GIT_SUBMODULE_IGNORE_ALL** means not to open the submodule repo.
  *    The working directory will be consider clean so long as there is a
  *    checked out version present.
  *
  * @param submodule The submodule to check
  * @return The current git_submodule_ignore_t valyue what will be used for
  *         this submodule.
  */
 GIT_EXTERN(git_submodule_ignore_t) git_submodule_ignore(
     git_submodule *submodule);
 
 /**
  * Set the ignore rule for the submodule in the configuration
  *
  * This does not affect any currently-loaded instances.
  *
  * @param repo the repository to affect
  * @param name the name of the submdule
  * @param ignore The new value for the ignore rule
  * @return 0 or an error code
  */
 GIT_EXTERN(int) git_submodule_set_ignore(
     git_repository *repo,
     const char *name,
     git_submodule_ignore_t ignore);
 
 /**
  * Get the update rule that will be used for the submodule.
  *
  * This value controls the behavior of the `git submodule update` command.
  * There are four useful values documented with `git_submodule_update_t`.
  *
  * @param submodule The submodule to check
  * @return The current git_submodule_update_t value that will be used
  *         for this submodule.
  */
 GIT_EXTERN(git_submodule_update_t) git_submodule_update_strategy(
     git_submodule *submodule);
 
 /**
  * Set the update rule for the submodule in the configuration
  *
  * This setting won't affect any existing instances.
  *
  * @param repo the repository to affect
  * @param name the name of the submodule to configure
  * @param update The new value to use
  * @return 0 or an error code
  */
 GIT_EXTERN(int) git_submodule_set_update(
     git_repository *repo,
     const char *name,
     git_submodule_update_t update);
 
 /**
  * Read the fetchRecurseSubmodules rule for a submodule.
  *
  * This accesses the submodule.<name>.fetchRecurseSubmodules value for
  * the submodule that controls fetching behavior for the submodule.
  *
  * Note that at this time, libgit2 does not honor this setting and the
  * fetch functionality current ignores submodules.
  *
  * @return 0 if fetchRecurseSubmodules is false, 1 if true
  */
 GIT_EXTERN(git_submodule_recurse_t) git_submodule_fetch_recurse_submodules(
     git_submodule *submodule);
 
 /**
  * Set the fetchRecurseSubmodules rule for a submodule in the configuration
  *
  * This setting won't affect any existing instances.
  *
  * @param repo the repository to affect
  * @param name the submodule to configure
  * @param fetch_recurse_submodules Boolean value
  * @return old value for fetchRecurseSubmodules
  */
 GIT_EXTERN(int) git_submodule_set_fetch_recurse_submodules(
     git_repository *repo,
     const char *name,
     git_submodule_recurse_t fetch_recurse_submodules);
 
 /**
  * Copy submodule info into ".git/config" file.
  *
  * Just like "git submodule init", this copies information about the
  * submodule into ".git/config".  You can use the accessor functions
  * above to alter the in-memory git_submodule object and control what
  * is written to the config, overriding what is in .gitmodules.
  *
  * @param submodule The submodule to write into the superproject config
  * @param overwrite By default, existing entries will not be overwritten,
  *                  but setting this to true forces them to be updated.
  * @return 0 on success, <0 on failure.
  */
 GIT_EXTERN(int) git_submodule_init(git_submodule *submodule, int overwrite);
 
 /**
  * Set up the subrepository for a submodule in preparation for clone.
  *
  * This function can be called to init and set up a submodule
  * repository from a submodule in preparation to clone it from
  * its remote.
  *
  * @param out Output pointer to the created git repository.
  * @param sm The submodule to create a new subrepository from.
  * @param use_gitlink Should the workdir contain a gitlink to
  *        the repo in .git/modules vs. repo directly in workdir.
  * @return 0 on success, <0 on failure.
  */
 GIT_EXTERN(int) git_submodule_repo_init(
     git_repository **out,
     const git_submodule *sm,
     int use_gitlink);
 
 /**
  * Copy submodule remote info into submodule repo.
  *
  * This copies the information about the submodules URL into the checked out
  * submodule config, acting like "git submodule sync".  This is useful if
  * you have altered the URL for the submodule (or it has been altered by a
  * fetch of upstream changes) and you need to update your local repo.
  *
  * @param submodule The submodule to copy.
  * @return 0 or an error code.
  */
 GIT_EXTERN(int) git_submodule_sync(git_submodule *submodule);
 
 /**
  * Open the repository for a submodule.
  *
  * This is a newly opened repository object.  The caller is responsible for
  * calling `git_repository_free()` on it when done.  Multiple calls to this
  * function will return distinct `git_repository` objects.  This will only
  * work if the submodule is checked out into the working directory.
  *
  * @param repo Pointer to the submodule repo which was opened
  * @param submodule Submodule to be opened
  * @return 0 on success, <0 if submodule repo could not be opened.
  */
 GIT_EXTERN(int) git_submodule_open(
     git_repository **repo,
     git_submodule *submodule);
 
 /**
  * Reread submodule info from config, index, and HEAD.
  *
  * Call this to reread cached submodule information for this submodule if
  * you have reason to believe that it has changed.
  *
  * @param submodule The submodule to reload
  * @param force Force reload even if the data doesn't seem out of date
  * @return 0 on success, <0 on error
  */
 GIT_EXTERN(int) git_submodule_reload(git_submodule *submodule, int force);
 
 /**
  * Get the status for a submodule.
  *
  * This looks at a submodule and tries to determine the status.  It
  * will return a combination of the `GIT_SUBMODULE_STATUS` values above.
  * How deeply it examines the working directory to do this will depend
  * on the `git_submodule_ignore_t` value for the submodule.
  *
  * @param status Combination of `GIT_SUBMODULE_STATUS` flags
  * @param repo the repository in which to look
  * @param name name of the submodule
  * @param ignore the ignore rules to follow
  * @return 0 on success, <0 on error
  */
 GIT_EXTERN(int) git_submodule_status(
     unsigned int *status,
     git_repository *repo,
     const char *name,
     git_submodule_ignore_t ignore);
 
 /**
  * Get the locations of submodule information.
  *
  * This is a bit like a very lightweight version of `git_submodule_status`.
  * It just returns a made of the first four submodule status values (i.e.
  * the ones like GIT_SUBMODULE_STATUS_IN_HEAD, etc) that tell you where the
  * submodule data comes from (i.e. the HEAD commit, gitmodules file, etc.).
  * This can be useful if you want to know if the submodule is present in the
  * working directory at this point in time, etc.
  *
  * @param location_status Combination of first four `GIT_SUBMODULE_STATUS` flags
  * @param submodule Submodule for which to get status
  * @return 0 on success, <0 on error
  */
 GIT_EXTERN(int) git_submodule_location(
     unsigned int *location_status,
     git_submodule *submodule);
 
 /** @} */
 GIT_END_DECL
 #endif

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