From d7bd57154e1b74801dacf33a6fca1e422b61f220 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Wed, 19 Jun 2024 00:18:19 +0200
Subject: Count additional revision for dirty index and/or worktree

---
 datever.c | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/datever.c b/datever.c
index 626899b..2e90be7 100644
--- a/datever.c
+++ b/datever.c
@@ -14,8 +14,10 @@ struct datever
 
 
 static int must(const char* msg, int err);
+static int is_dirty(git_repository* repo);
 static struct datever find_latest(git_repository* repo);
 static struct datever datever_init();
+static struct datever datever_today();
 static struct datever datever_from_time(time_t time);
 static int datever_is_valid(const struct datever* ver);
 static int datever_compare(const struct datever* lhs, const struct datever* rhs);
@@ -29,6 +31,7 @@ main()
 	must("open repository", git_repository_open_ext(&repo, NULL, GIT_REPOSITORY_OPEN_FROM_ENV, NULL));
 	const struct datever ver = find_latest(repo);
 	printf("%d%02d%02d.%d\n", ver.year, ver.month, ver.day, ver.revision);
+	git_libgit2_shutdown();
 }
 
 
@@ -48,6 +51,23 @@ must(const char* const msg, const int err)
 }
 
 
+int
+is_dirty(git_repository* repo)
+{
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+	git_status_options statopts = GIT_STATUS_OPTIONS_INIT;
+#pragma GCC diagnostic pop
+	statopts.show = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
+	statopts.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED;
+	git_status_list* status;
+	must("retrieve status", git_status_list_new(&status, repo, &statopts));
+	const int count = git_status_list_entrycount(status);
+	git_status_list_free(status);
+	return count > 0;
+}
+
+
 struct datever
 find_latest(git_repository* const repo)
 {
@@ -56,14 +76,14 @@ find_latest(git_repository* const repo)
 	must("find HEAD", git_revwalk_push_head(walker));
 	git_oid oid;
 	git_commit* commit;
-	struct datever prev = datever_init();
+	struct datever prev = is_dirty(repo) ? datever_today() : datever_init();
 	struct datever ver = datever_init();
 	while (0 == git_revwalk_next(&oid, walker)) {
 		must("find commit", git_commit_lookup(&commit, repo, &oid));
 		ver = datever_from_time(git_commit_time(commit));
 		if (datever_is_valid(&prev)) {
 			if (0 == datever_compare(&prev, &ver))
-				ver.revision++;
+				ver.revision += prev.revision;
 			else break;
 		}
 		prev = ver;
@@ -88,6 +108,13 @@ datever_init()
 
 
 struct datever
+datever_today()
+{
+	return datever_from_time(time(NULL));
+}
+
+
+struct datever
 datever_from_time(const time_t time)
 {
 	const struct tm* tm = gmtime(&time);
-- 
cgit v1.1