Allow unresolved variables during resolution.

5 files changed, 13 insertions, 10 deletions

diff --git a/src/WixToolset.Core/Bind/ResolveFieldsCommand.cs b/src/WixToolset.Core/Bind/ResolveFieldsCommand.cs
index 5db878a1..3e680a98 100644
--- a/src/WixToolset.Core/Bind/ResolveFieldsCommand.cs
+++ b/src/WixToolset.Core/Bind/ResolveFieldsCommand.cs
@@ -32,6 +32,8 @@ namespace WixToolset.Core.Bind
 
         public bool SupportDelayedResolution { private get; set; }
 
+        public bool AllowUnresolvedVariables { private get; set; }
+
         public IEnumerable<DelayedField> DelayedFields { get; private set; }
 
         public void Execute()
@@ -62,7 +64,7 @@ namespace WixToolset.Core.Bind
                                 var original = field.AsString();
                                 if (!String.IsNullOrEmpty(original))
                                 {
-                                    var resolution = this.VariableResolver.ResolveVariables(tuple.SourceLineNumbers, original);
+                                    var resolution = this.VariableResolver.ResolveVariables(tuple.SourceLineNumbers, original, !this.AllowUnresolvedVariables);
                                     if (resolution.UpdatedValue)
                                     {
                                         field.Set(resolution.Value);
diff --git a/src/WixToolset.Core/ResolveContext.cs b/src/WixToolset.Core/ResolveContext.cs
index 1801f820..1694d6e5 100644
--- a/src/WixToolset.Core/ResolveContext.cs
+++ b/src/WixToolset.Core/ResolveContext.cs
@@ -33,5 +33,7 @@ namespace WixToolset.Core
         public IEnumerable<Localization> Localizations { get; set; }
 
         public IVariableResolver VariableResolver { get; set; }
+
+        public bool AllowUnresolvedVariables { get; set; }
     }
 }
diff --git a/src/WixToolset.Core/Resolver.cs b/src/WixToolset.Core/Resolver.cs
index 54bde848..6913ce98 100644
--- a/src/WixToolset.Core/Resolver.cs
+++ b/src/WixToolset.Core/Resolver.cs
@@ -87,6 +87,7 @@ namespace WixToolset.Core
                 command.IntermediateFolder = context.IntermediateFolder;
                 command.Intermediate = context.IntermediateRepresentation;
                 command.SupportDelayedResolution = true;
+                command.AllowUnresolvedVariables = context.AllowUnresolvedVariables;
                 command.Execute();
 
                 delayedFields = command.DelayedFields;
diff --git a/src/WixToolset.Core/VariableResolver.cs b/src/WixToolset.Core/VariableResolver.cs
index b1a5defc..8cddfaa5 100644
--- a/src/WixToolset.Core/VariableResolver.cs
+++ b/src/WixToolset.Core/VariableResolver.cs
@@ -77,14 +77,7 @@ namespace WixToolset.Core
             return this.localizedControls.TryGetValue(key, out localizedControl);
         }
 
-        /// <summary>
-        /// Resolve the wix variables in a value.
-        /// </summary>
-        /// <param name="sourceLineNumbers">The source line information for the value.</param>
-        /// <param name="value">The value to resolve.</param>
-        /// <param name="errorOnUnknown">true if unknown variables should throw errors.</param>
-        /// <returns>The resolved value.</returns>
-        internal IVariableResolution ResolveVariables(SourceLineNumber sourceLineNumbers, string value, bool errorOnUnknown)
+        public IVariableResolution ResolveVariables(SourceLineNumber sourceLineNumbers, string value, bool errorOnUnknown)
         {
             var matches = Common.WixVariableRegex.Matches(value);
 
diff --git a/src/test/WixToolsetTest.CoreIntegration/VariableResolverFixture.cs b/src/test/WixToolsetTest.CoreIntegration/VariableResolverFixture.cs
index abf1bd43..3443896b 100644
--- a/src/test/WixToolsetTest.CoreIntegration/VariableResolverFixture.cs
+++ b/src/test/WixToolsetTest.CoreIntegration/VariableResolverFixture.cs
@@ -50,7 +50,12 @@ namespace WixToolsetTest.CoreIntegration
             Assert.False(result.UpdatedValue);
             Assert.True(result.DelayedResolve);
 
-            Assert.Throws<WixException>(() => variableResolver.ResolveVariables(null, "Welcome to !(loc.UnknownLocalizationVariable)"));
+            var withUnknownLocString = "Welcome to !(loc.UnknownLocalizationVariable)";
+            Assert.Throws<WixException>(() => variableResolver.ResolveVariables(null, withUnknownLocString));
+
+            result = variableResolver.ResolveVariables(null, withUnknownLocString, errorOnUnknown: false);
+            Assert.Equal(withUnknownLocString, result.Value);
+            Assert.False(result.UpdatedValue);
 
             result = variableResolver.ResolveVariables(null, "Welcome to !!(loc.UnknownLocalizationVariable)");
             Assert.Equal("Welcome to !(loc.UnknownLocalizationVariable)", result.Value);