From 43422b026d4728f9da372cb018bf33d223bb9569 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Fri, 8 Jul 2022 22:24:59 +0200
Subject: Added special matching case for root commit

---
 pkgrel.c | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/pkgrel.c b/pkgrel.c
index 653a0db..d7551e1 100644
--- a/pkgrel.c
+++ b/pkgrel.c
@@ -9,10 +9,11 @@
 
 enum match_result
 {
-	MATCH_RESULT_NEVER,
-	MATCH_RESULT_NEWDIFF,
-	MATCH_RESULT_NOTFOUND,
-	MATCH_RESULT_FOUND,
+	MATCH_RESULT_INIT,
+	MATCH_RESULT_ROOT,
+	MATCH_RESULT_COMMIT,
+	MATCH_RESULT_ANYTHING,
+	MATCH_RESULT_PKGVER,
 };
 
 
@@ -88,8 +89,8 @@ try_git(const int err, const char* msg)
 
 
 /// Callback for git_diff_foreach. Check each line reported by the diff looking for "pkgver" occurrance. If found, set
-/// *payload* to MATCH_RESULT_FOUND, otherwise set it to MATCH_RESULT_NOTFOUND, but only if it is not set to FOUND
-/// already.
+/// *payload* to MATCH_RESULT_PKGVER, otherwise set it to MATCH_RESULT_ANYTHING, but only if it is not set to
+/// MATCH_RESULT_PKGVER already.
 int
 match_line(const git_diff_delta* delta, const git_diff_hunk* hunk, const git_diff_line* line, void* payload)
 {
@@ -100,12 +101,11 @@ match_line(const git_diff_delta* delta, const git_diff_hunk* hunk, const git_dif
 	case GIT_DIFF_LINE_ADDITION:
 	case GIT_DIFF_LINE_DELETION:
 		if (PKGVER_LEN <= line->content_len && 0 == strncmp(line->content, PKGVER, PKGVER_LEN))
-			*match = MATCH_RESULT_FOUND;
+			*match = MATCH_RESULT_PKGVER;
+		else if (MATCH_RESULT_PKGVER != *match)
+			*match = MATCH_RESULT_ANYTHING;
 		break;
 	default:
-		if (MATCH_RESULT_FOUND > *match)
-			*match = MATCH_RESULT_NOTFOUND;
-		break;
 	}
 	return 0;
 }
@@ -133,10 +133,12 @@ main(int argc, char* argv[])
 	git_tree* earlier = NULL;
 	git_tree* later = NULL;
 	int relpkg = 1;
-	enum match_result match = MATCH_RESULT_NEVER;
+	enum match_result match = MATCH_RESULT_INIT;
 	while (0 == git_revwalk_next(&oid, walker)) {
 		git_commit* commit;
 		try_git(git_commit_lookup(&commit, repo, &oid), "finding commit");
+		if (0 == git_commit_parentcount(commit))
+			match = MATCH_RESULT_ROOT;
 		if (NULL != earlier)
 			git_tree_free(earlier);
 		earlier = later;
@@ -146,17 +148,17 @@ main(int argc, char* argv[])
 			try_git(git_diff_tree_to_workdir_with_index(&diff, repo, later, &diffopts), "diff");
 		else
 			try_git(git_diff_tree_to_tree(&diff, repo, later, earlier, &diffopts), "diff");
-		if (MATCH_RESULT_NEVER < match)
-			match = MATCH_RESULT_NEWDIFF;
-		try_git(git_diff_foreach(diff, NULL, NULL, NULL, &match_line, &match), "searching lines");
+		if (MATCH_RESULT_INIT != match)
+			match = MATCH_RESULT_COMMIT;
+		try_git(git_diff_foreach(diff, NULL, NULL, NULL, &match_line, &match), "searching history");
 		git_diff_free(diff);
 		git_commit_free(commit);
-		if (MATCH_RESULT_FOUND == match)
+		if (MATCH_RESULT_PKGVER == match)
 			break;
-		if (MATCH_RESULT_NOTFOUND == match)
+		if (MATCH_RESULT_ANYTHING == match)
 			relpkg++;
 	}
-	if (MATCH_RESULT_NEVER == match) {
+	if (MATCH_RESULT_INIT == match) {
 		dprintf(2, "PKGBUILD not found\n");
 		exit(1);
 	}
-- 
cgit v1.1