From 43402df89629a25ce0e63c73d756a3bf49acc589 Mon Sep 17 00:00:00 2001
From: Jordan Harband <ljharb@gmail.com>
Date: Tue, 26 Feb 2019 16:53:36 -0800
Subject: [PATCH] [Fix] `nvm_supports_source_options`: work around a bug in
 bash 3.2

See https://github.com/creationix/nvm/issues/1978#issuecomment-453480231

Fixes #1978.
---
 nvm.sh                                        |  5 +++-
 .../Unit tests/nvm_supports_source_options    | 27 +++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)
 create mode 100755 test/fast/Unit tests/nvm_supports_source_options

diff --git a/nvm.sh b/nvm.sh
index 3170252..01213a3 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -3559,7 +3559,10 @@ nvm_install_default_packages() {
 
 nvm_supports_source_options() {
   # shellcheck disable=SC1091,SC2240
-  [ "_$(nvm_echo '[ $# -gt 0 ] && nvm_echo $1' | . /dev/stdin yes 2>/dev/null)" = "_yes" ]
+    [ "_$( . /dev/stdin yes 2> /dev/null <<'EOF'
+[ $# -gt 0 ] && nvm_echo $1
+EOF
+  )" = "_yes" ]
 }
 
 nvm_supports_xz() {
diff --git a/test/fast/Unit tests/nvm_supports_source_options b/test/fast/Unit tests/nvm_supports_source_options
new file mode 100755
index 0000000..ceeff91
--- /dev/null
+++ b/test/fast/Unit tests/nvm_supports_source_options	
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+die () { echo "$@" ; exit 1; }
+
+\. ../../../nvm.sh
+
+x=0
+i=0
+runs=5
+calls=500
+first_result=false
+if (nvm_supports_source_options && printf .); then
+  first_result=true
+fi
+while [ $x -le $runs ]; do
+  y=$x
+  x=$(( x + 1 ))
+  while [ $i -le $calls ]; do
+    this_result=false
+    if (nvm_supports_source_options && printf .); then
+      this_result=true
+    fi
+    [ $this_result = $first_result ] || die "call ${i}, run ${y} got ${this_result}; expected ${first_result}"
+    i=$(( i + 1 ))
+  done
+done
+echo "${runs} runs of ${calls} calls succeeded"