From 32cbb152660566042ac25b00de4b19b1c90c0f5c Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Mon, 16 Dec 2024 09:09:03 +0100
Subject: Serialize integer-ish config keys properly

---
 liberty.c       | 3 ++-
 tests/liberty.c | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/liberty.c b/liberty.c
index ff7c0c7..0690e89 100644
--- a/liberty.c
+++ b/liberty.c
@@ -4833,7 +4833,8 @@ config_item_write_kv_pair (struct config_writer *self,
 		str_append_printf (self->output,
 			"%s# %s\n", indent, value->schema->comment);
 
-	bool can_use_word = true;
+	char *end = NULL;
+	bool can_use_word = ((void) strtoll (key, &end, 10), end == key);
 	for (const char *p = key; *p; p++)
 		if (!config_tokenizer_is_word_char (*p))
 			can_use_word = false;
diff --git a/tests/liberty.c b/tests/liberty.c
index 92647ae..fddfb2c 100644
--- a/tests/liberty.c
+++ b/tests/liberty.c
@@ -647,7 +647,7 @@ static const struct config_schema g_config_test[] =
 	  .type      = CONFIG_ITEM_INTEGER,
 	  .validate  = test_config_validate_nonnegative,
 	  .default_  = "1" },
-	{ .name      = "foobar",
+	{ .name      = "123",
 	  .type      = CONFIG_ITEM_STRING,
 	  .default_  = "\"qux\\x01`\" \"\"`a`" },
 	{}
@@ -676,10 +676,11 @@ test_config (void)
 	config_item_destroy (invalid);
 
 	hard_assert (!strcmp ("qux\001`a",
-		config_item_get (config.root, "top.foobar", NULL)->value.string.str));
+		config_item_get (config.root, "top.123", NULL)->value.string.str));
 
 	struct str s = str_make ();
 	config_item_write (config.root, true, &s);
+	print_debug ("%s", s.str);
 	struct config_item *parsed = config_item_parse (s.str, s.len, false, NULL);
 	hard_assert (parsed);
 	config_item_destroy (parsed);
-- 
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