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84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/*
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* git-util.c - Git utility functions
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*
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* Written 2016 by Werner Almesberger
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* Copyright 2016 by Werner Almesberger
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <stdbool.h>
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#include <assert.h>
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#include <git2.h>
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#include "git-util.h"
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/*
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* This seems to be an efficient way for finding out if a repo is dirty.
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*
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* http://ben.straub.cc/2013/04/02/libgit2-checkout/
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*
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* References:
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* https://libgit2.github.com/libgit2/#HEAD/group/checkout/git_checkout_index
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* https://libgit2.github.com/libgit2/#HEAD/type/git_checkout_options
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* https://github.com/libgit2/libgit2/blob/HEAD/include/git2/checkout.h#L251-295
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*/
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static int checkout_notify_cb(git_checkout_notify_t why,
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const char *path, const git_diff_file *baseline,
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const git_diff_file *target, const git_diff_file *workdir,
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void *payload)
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{
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bool *res = payload;
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assert(why == GIT_CHECKOUT_NOTIFY_DIRTY);
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*res = 1;
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return 0;
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}
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bool git_repo_is_dirty(git_repository *repo)
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{
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git_checkout_options opts;
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bool res = 0;
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/*
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* Initialization with GIT_CHECKOUT_OPTIONS_INIT complains about not
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* setting checkout_strategy. git_checkout_init_options is fine.
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*/
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git_checkout_init_options(&opts, GIT_CHECKOUT_OPTIONS_VERSION);
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opts.checkout_strategy = GIT_CHECKOUT_NONE;
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/* let's be explicit about this */
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opts.notify_flags = GIT_CHECKOUT_NOTIFY_DIRTY;
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opts.notify_cb = checkout_notify_cb;
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opts.notify_payload = &res;
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git_checkout_index(repo, NULL, &opts);
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return res;
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}
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/*
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* Git documentation says that git_libgit2_init can be called more then once
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* but doesn't quite what happens then, e.g., whether references obtained
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* before an init (except for the first, of course) can still be used after
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* it. So we play it safe and initialize only once.
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*/
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void git_init_once(void)
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{
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static bool initialized = 0;
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if (!initialized) {
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git_libgit2_init();
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initialized = 1;
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}
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}
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