1 files changed, 129 insertions, 0 deletions
diff --git a/git2d/cmd1.c b/git2d/cmd1.c
new file mode 100644
index 0000000..a7d8b07
--- /dev/null
+++ b/git2d/cmd1.c
@@ -0,0 +1,129 @@
+/*-
+ * SPDX-License-Identifier: AGPL-3.0-only
+ * SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+ */
+
+#include "x.h"
+
+int cmd_index(git_repository *repo, struct bare_writer *writer)
+{
+	/* HEAD tree */
+
+	git_object *obj = NULL;
+	int err = git_revparse_single(&obj, repo, "HEAD^{tree}");
+	if (err != 0) {
+		bare_put_uint(writer, 4);
+		return -1;
+	}
+	git_tree *tree = (git_tree *) obj;
+
+	/* README */
+
+	git_tree_entry *entry = NULL;
+	err = git_tree_entry_bypath(&entry, tree, "README.md");
+	if (err != 0) {
+		bare_put_uint(writer, 5);
+		git_tree_free(tree);
+		return -1;
+	}
+	git_otype objtype = git_tree_entry_type(entry);
+	if (objtype != GIT_OBJECT_BLOB) {
+		bare_put_uint(writer, 6);
+		git_tree_entry_free(entry);
+		git_tree_free(tree);
+		return -1;
+	}
+	git_object *obj2 = NULL;
+	err = git_tree_entry_to_object(&obj2, repo, entry);
+	if (err != 0) {
+		bare_put_uint(writer, 7);
+		git_tree_entry_free(entry);
+		git_tree_free(tree);
+		return -1;
+	}
+	git_blob *blob = (git_blob *) obj2;
+	const void *content = git_blob_rawcontent(blob);
+	if (content == NULL) {
+		bare_put_uint(writer, 8);
+		git_blob_free(blob);
+		git_tree_entry_free(entry);
+		git_tree_free(tree);
+		return -1;
+	}
+	bare_put_uint(writer, 0);
+	bare_put_data(writer, content, git_blob_rawsize(blob));
+
+	/* Commits */
+
+	/* TODO BUG: This might be a different commit from the displayed README due to races */
+
+	git_revwalk *walker = NULL;
+	if (git_revwalk_new(&walker, repo) != 0) {
+		bare_put_uint(writer, 9);
+		git_blob_free(blob);
+		git_tree_entry_free(entry);
+		git_tree_free(tree);
+		return -1;
+	}
+
+	if (git_revwalk_push_head(walker) != 0) {
+		bare_put_uint(writer, 9);
+		git_revwalk_free(walker);
+		git_blob_free(blob);
+		git_tree_entry_free(entry);
+		git_tree_free(tree);
+		return -1;
+	}
+
+	int count = 0;
+	git_oid oid;
+	while (count < 3 && git_revwalk_next(&oid, walker) == 0) {
+		git_commit *commit = NULL;
+		if (git_commit_lookup(&commit, repo, &oid) != 0)
+			break;
+
+		const char *msg = git_commit_summary(commit);
+		const git_signature *author = git_commit_author(commit);
+
+		/* ID */
+		bare_put_data(writer, oid.id, GIT_OID_RAWSZ);
+
+		/* Title */
+		size_t msg_len = msg ? strlen(msg) : 0;
+		bare_put_data(writer, (const uint8_t *)(msg ? msg : ""),
+			      msg_len);
+
+		/* Author's name */
+		const char *author_name = author ? author->name : "";
+		bare_put_data(writer, (const uint8_t *)author_name,
+			      strlen(author_name));
+
+		/* Author's email */
+		const char *author_email = author ? author->email : "";
+		bare_put_data(writer, (const uint8_t *)author_email,
+			      strlen(author_email));
+
+		/* Author's date */
+		/* TODO: Pass the integer instead of a string */
+		time_t time = git_commit_time(commit);
+		char timebuf[64];
+		struct tm *tm = localtime(&time);
+		if (tm)
+			strftime(timebuf, sizeof(timebuf), "%Y-%m-%d %H:%M:%S",
+				 tm);
+		else
+			strcpy(timebuf, "unknown");
+		bare_put_data(writer, (const uint8_t *)timebuf,
+			      strlen(timebuf));
+
+		git_commit_free(commit);
+		count++;
+	}
+
+	git_revwalk_free(walker);
+	git_blob_free(blob);
+	git_tree_entry_free(entry);
+	git_tree_free(tree);
+
+	return 0;
+}