From c4cc9795dcf7ecac318dd00f7704fb4e45fd8174 Mon Sep 17 00:00:00 2001
From: "Dirk-Jan C. Binnema" <djcb@djcbsoftware.nl>
Date: Tue, 17 May 2022 22:31:03 +0300
Subject: [PATCH] utils: add locale_workaround

Attempt to work around some locale handling throwing in some systems.

   "locale::facet::_S_create_c_locale name not valid"

Ugly, but maybe it helps.
---
 lib/utils/mu-utils.cc | 19 +++++++++++++++++++
 lib/utils/mu-utils.hh | 21 ++++++---------------
 2 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/lib/utils/mu-utils.cc b/lib/utils/mu-utils.cc
index 0cc34a50..28abc43e 100644
--- a/lib/utils/mu-utils.cc
+++ b/lib/utils/mu-utils.cc
@@ -19,6 +19,7 @@
 
 #ifndef _XOPEN_SOURCE
 #define _XOPEN_SOURCE
+#include <stdexcept>
 #endif /*_XOPEN_SOURCE*/
 
 #include <array>
@@ -606,3 +607,21 @@ Mu::TempDir::~TempDir()
 
 	g_debug("removed '%s'", path_.c_str());
 }
+
+bool
+Mu::locale_workaround()
+{
+	// quite horrible... but some systems break otherwise with
+	//  https://github.com/djcb/mu/issues/2252
+
+	for (auto&& loc : {"", "en_US.UTF-8", "C" }) {
+		try {
+			std::locale::global(std::locale(loc));
+			return true;
+		} catch (const std::runtime_error& re) {
+			continue;
+		}
+	}
+
+	return false;
+}
diff --git a/lib/utils/mu-utils.hh b/lib/utils/mu-utils.hh
index 95d6d82f..8018a495 100644
--- a/lib/utils/mu-utils.hh
+++ b/lib/utils/mu-utils.hh
@@ -147,22 +147,13 @@ std::string date_to_time_t_string(int64_t t);
 std::string time_to_string(const std::string& frm, time_t t, bool utc = false) G_GNUC_CONST;
 
 
-// /**
-//  * Create a std::string by consuming a gchar* array; this takes ownership
-//  * of str which should no longer be used.
-//  *
-//  * @param str a gchar* or NULL (latter taken as "")
-//  *
-//  * @return a std::string
-//  */
-// static inline std::string
-// from_gchars(gchar*&& str)
-// {
-//	std::string s{str ? str : ""};
-//	g_free(str);
+/**
+ * Hack to avoid locale crashes
+ *
+ * @return true if setting locale worked; false otherwise
+ */
+bool locale_workaround();
 
-//	return s;
-// }
 
 // https://stackoverflow.com/questions/19053351/how-do-i-use-a-custom-deleter-with-a-stdunique-ptr-member
 template <auto fn>