From 12736c48db116a1e72bfd799efa174f82f42b88e Mon Sep 17 00:00:00 2001
From: Patrick McDermott <patrick.mcdermott@libiquity.com>
Date: Mon, 18 Mar 2019 00:51:50 -0400
Subject: Revert "ob_set_substvar(): Replace sed with read"

This reverts commit 96851fd522ae3540314ac5c5d4d4fbec1448ca4b.
---
(limited to 'lib/control.sh')

diff --git a/lib/control.sh b/lib/control.sh
index b388705..78951bb 100644
--- a/lib/control.sh
+++ b/lib/control.sh
@@ -201,9 +201,16 @@ ob_set_substvar()
 		)"
 
 	# Trim leading and trailing whitespace from value.
-	read -r value <<-EOF
-		${value}
-		EOF
+	# TODO: "read" can probably do this more simply.
+	value="$(echo "${value}" | sed -n '
+		H;             # Store each input line in the hold space.
+		${             # At the last line of input:
+		  g;           # restore the hold space into the pattern space,
+		  s/^[\n]*//;  # remove leading newline characters,
+		  s/[\n]*$//;  # remove trailing newline characters, and
+		  p;           # print the results.
+		};
+		')"
 
 	eval "_OB_SUBSTVAR_${name}=\"\${value}\""
 
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