From 32578f7520dfd9bec4d72ffd095f36fb47c84dc6 Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Tue, 25 Feb 2020 12:29:15 +0100
Subject: [PATCH] Respect the XDG base directory specification

This helps unclutter the home directory from useless dotfiles, moving
them where they belong.

See https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
---
 hecl/lib/Runtime/FileStoreManager.cpp | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/hecl/lib/Runtime/FileStoreManager.cpp b/hecl/lib/Runtime/FileStoreManager.cpp
index bd828e4cb..fc88eee6f 100644
--- a/hecl/lib/Runtime/FileStoreManager.cpp
+++ b/hecl/lib/Runtime/FileStoreManager.cpp
@@ -36,11 +36,20 @@ FileStoreManager::FileStoreManager(SystemStringView domain) : m_domain(domain) {
   hecl::MakeDir(path.c_str());
   m_storeRoot = path;
 #else
-  const char* home = getenv("HOME");
-  if (!home)
-    Log.report(logvisor::Fatal, fmt("unable to locate $HOME for file store"));
-  std::string path(home);
-  path += "/.heclrun";
+  const char* xdg_data_home = getenv("XDG_DATA_HOME");
+  std::string path;
+  if (xdg_data_home) {
+    if (xdg_data_home[0] != '/')
+      Log.report(logvisor::Fatal, fmt("invalid $XDG_DATA_HOME for file store (must be absolute)"));
+    path = xdg_data_home;
+  } else {
+    const char* home = getenv("HOME");
+    if (!home)
+      Log.report(logvisor::Fatal, fmt("unable to locate $HOME for file store"));
+    path = home;
+    path += "/.local/share"
+  }
+  path += "/hecl";
   if (mkdir(path.c_str(), 0755) && errno != EEXIST)
     Log.report(logvisor::Fatal, fmt("unable to mkdir at {}"), path);
   path += '/';