From d0f3e5458fd9f93bff68cb2047ad531c7e0e9375 Mon Sep 17 00:00:00 2001
From: Adam Spiers <stow@adamspiers.org>
Date: Wed, 11 Nov 2015 11:22:05 +0000
Subject: [PATCH] Correctly handle empty STOW_DIR (#5, #6)

In shell, a variable is often considered unset even if it is
set to the empty string.  In other words,

  STOW_DIR= stow [args]

is an idiomatic alternative to writing:

  unset STOW_DIR
  stow [args]

and it also has the advantage of temporarily "unsetting" STOW_DIR
for a single command.

Therefore we should treat STOW_DIR being set to the empty string
as equivalent to it not being set at all.

Thanks to Cuong Manh Le for highlighting this issue!

Fixes #6  - https://github.com/aspiers/stow/issues/6
Closes #5 - https://github.com/aspiers/stow/pull/5
---
 THANKS      | 1 +
 bin/stow.in | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/THANKS b/THANKS
index 191e0ba..bd3b5a9 100644
--- a/THANKS
+++ b/THANKS
@@ -23,3 +23,4 @@ Christopher Hoobin  <christopher.hoobin.edu.au>
 Adam Spiers         <stow@adamspiers.org>
 Stefano Lattarini
 Adam Sampson
+Cuong Manh Le
diff --git a/bin/stow.in b/bin/stow.in
index 5263fe8..c437f29 100755
--- a/bin/stow.in
+++ b/bin/stow.in
@@ -542,7 +542,7 @@ sub sanitize_path_options {
         $options->{dir}    =~ s/ +\z//;
     }
     else {
-        $options->{dir} = exists $ENV{STOW_DIR} ? $ENV{STOW_DIR} : getcwd();
+        $options->{dir} = $ENV{STOW_DIR} ? $ENV{STOW_DIR} : getcwd();
     }
 
     if (exists $options->{target}) {