1 files changed, 22 insertions, 0 deletions
diff --git a/vim/autoload/getenv.vim b/vim/autoload/getenv.vim
new file mode 100644
index 00000000..2b8fef1b
--- /dev/null
+++ b/vim/autoload/getenv.vim
@@ -0,0 +1,22 @@
+" Backport getenv() from v8.1.1305
+"
+" <https://github.com/vim/vim/releases/tag/v8.1.1305>
+"
+function! getenv#(name) abort
+
+  " Use native if available
+  if exists('*getenv')
+    return getenv(a:name)
+  endif
+
+  " Backport
+  if a:name !~# '^[A-Z][A-Z0-9_]*$'
+    throw 'Illegal env var name'
+  endif
+  let value = v:null
+  if exists('$'.a:name)
+    execute 'let value = $'.a:name
+  endif
+  return value
+
+endfunction