From fa07c78c0ce6724249441c31ff2c2c3e7840d52a Mon Sep 17 00:00:00 2001
From: eric sciple <ericsciple@github.com>
Date: Wed, 26 Jan 2022 13:15:05 -0600
Subject: [PATCH] .

---
 src/Runner.Common/HostContext.cs           |  1 +
 src/Sdk/DTLogging/Logging/ValueEncoders.cs | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/src/Runner.Common/HostContext.cs b/src/Runner.Common/HostContext.cs
index 643c61c81..1834a57fa 100644
--- a/src/Runner.Common/HostContext.cs
+++ b/src/Runner.Common/HostContext.cs
@@ -84,6 +84,7 @@ namespace GitHub.Runner.Common
             this.SecretMasker.AddValueEncoder(ValueEncoders.Base64StringEscape);
             this.SecretMasker.AddValueEncoder(ValueEncoders.Base64StringEscapeShift1);
             this.SecretMasker.AddValueEncoder(ValueEncoders.Base64StringEscapeShift2);
+            this.SecretMasker.AddValueEncoder(ValueEncoders.BashComparand);
             this.SecretMasker.AddValueEncoder(ValueEncoders.CommandLineArgumentEscape);
             this.SecretMasker.AddValueEncoder(ValueEncoders.ExpressionStringEscape);
             this.SecretMasker.AddValueEncoder(ValueEncoders.JsonStringEscape);
diff --git a/src/Sdk/DTLogging/Logging/ValueEncoders.cs b/src/Sdk/DTLogging/Logging/ValueEncoders.cs
index c3c065bc2..3ef804a6d 100644
--- a/src/Sdk/DTLogging/Logging/ValueEncoders.cs
+++ b/src/Sdk/DTLogging/Logging/ValueEncoders.cs
@@ -38,6 +38,20 @@ namespace GitHub.DistributedTask.Logging
             return Base64StringEscapeShift(value, 2);
         }
 
+        public static String BashComparand(String value)
+        {
+            var result = new StringBuilder();
+            foreach (var c in value)
+            {
+                if (!char.IsLowSurrogate(c))
+                {
+                    result.Append('\\');
+                }
+                result.Append(c);
+            }
+            return result.ToString();
+        }
+
         // Used when we pass environment variables to docker to escape " with \"
         public static String CommandLineArgumentEscape(String value)
         {