From 3abbdb2f414be25a018c91a506ed4d5ecef5a08f Mon Sep 17 00:00:00 2001
From: Rui Abreu Ferreira <raf-ep@gmx.com>
Date: Thu, 13 Nov 2014 10:15:00 +0000
Subject: Windows: Define HOME environment variable

- Bring back Vim code for settings $HOME in Windows from
  $HOMEDRIVE$HOMEPATH
- vim-patch:0
---
 src/nvim/os/env.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'src')

diff --git a/src/nvim/os/env.c b/src/nvim/os/env.c
index bf6db97fcf..0e052ced55 100644
--- a/src/nvim/os/env.c
+++ b/src/nvim/os/env.c
@@ -141,6 +141,27 @@ void init_homedir(void)
 
   char_u *var = (char_u *)os_getenv("HOME");
 
+#ifdef WIN32
+  // Typically, $HOME is not defined on Windows, unless the user has
+  // specifically defined it for Vim's sake. However, on Windows NT
+  // platforms, $HOMEDRIVE and $HOMEPATH are automatically defined for
+  // each user. Try constructing $HOME from these.
+  if (var == NULL) {
+    const char *homedrive = os_getenv("HOMEDRIVE");
+    const char *homepath = os_getenv("HOMEPATH");
+    if (homepath == NULL) {
+        homepath = "\\";
+    }
+    if (homedrive != NULL && strlen(homedrive) + strlen(homepath) < MAXPATHL) {
+      snprintf((char *)NameBuff, MAXPATHL, "%s%s", homedrive, homepath);
+      if (NameBuff[0] != NUL) {
+        var = NameBuff;
+        vim_setenv("HOME", (char *)NameBuff);
+      }
+    }
+  }
+#endif
+
   if (var != NULL) {
 #ifdef UNIX
     /*
-- 
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