Support ignoring PS failures (#14)

* Handle null results

* Support overriding immediate actions scheduling

* Support ignoring PS failures

Author: nirbar

PowerShellActions/CustomAction.cs

@@ -207,7 +207,7 @@ private static ActionResult FilesImmediate(Session session, int elevated, string
             try
             {
                 XDocument doc;
-                using (View view = db.OpenView(string.Format("SELECT `Id`, `File`, `Arguments` FROM `{0}` WHERE `Elevated` = {1}", tableName, elevated)))
+                using (View view = db.OpenView(string.Format("SELECT `Id`, `File`, `Arguments`, `IgnoreErrors` FROM `{0}` WHERE `Elevated` = {1}", tableName, elevated)))
                 {
                     view.Execute();
 
@@ -216,11 +216,12 @@ private static ActionResult FilesImmediate(Session session, int elevated, string
                     foreach (Record row in view)
                     {
                         var args = session.Format(row["Arguments"].ToString());
+                        var IgnoreErrors = session.Format(row["IgnoreErrors"].ToString());
 
                         session.Log("args '{0}'", args);
 
                         doc.Root.Add(new XElement("d", new XAttribute("Id", row["Id"]),
-                            new XAttribute("file", session.Format(row["File"].ToString())), new XAttribute("args", args)));
+                            new XAttribute("file", session.Format(row["File"].ToString())), new XAttribute("args", args), new XAttribute("IgnoreErrors", IgnoreErrors)));
                     }
                 }
 
@@ -310,15 +311,40 @@ private static ActionResult FilesDeferred(Session session, string deferredProper
                     string file = row.Attribute("file").Value;
 
                     string arguments = row.Attribute("args").Value;
+                    string IgnoreErrors = row.Attribute("IgnoreErrors").Value;
 
                     using (var task = new PowerShellTask(file, arguments, session))
                     {
-                        bool result = task.Execute();
-                        session.Log("PowerShell non-terminating errors: {0}", !result);
-                        if (!result)
+                        try
                         {
-                            session.Log("Returning Failure");
-                            return ActionResult.Failure;
+                            bool result = task.Execute();
+                            session.Log("PowerShell non-terminating errors: {0}", !result);
+                            if (!result)
+                            {
+                                if (!IgnoreErrors.Equals("0"))
+                                {
+                                    session.Log("Ignoring failure due to 'IgnoreErrors' marking");
+                                }
+                                else
+                                {
+                                    session.Log("Returning Failure");
+                                    return ActionResult.Failure;
+                                }
+                            }
+                        }
+                        catch (Exception ex)
+                        {
+                            if (!IgnoreErrors.Equals("0"))
+                            {
+                                session.Log("Ignoring PowerShell error due to 'IgnoreErrors' marking");
+                                session.Log(ex.ToString());
+                            }
+                            else
+                            {
+                                session.Log("PowerShell terminating error, returning Failure");
+                                session.Log(ex.ToString());
+                                return ActionResult.Failure;
+                            }
                         }
                     }
                 }

PowerShellWixExtension/PowerShellCompilerExtension.cs

@@ -60,6 +60,7 @@ private void ParseFileElement(XmlNode node)
             string file = null;
             string arguments = null;
             var elevated = YesNoType.No;
+            YesNoType ignoreErrors = YesNoType.No;
 
             foreach (XmlAttribute attribute in node.Attributes)
             {
@@ -80,6 +81,9 @@ private void ParseFileElement(XmlNode node)
                         case "Elevated":
                             elevated = Core.GetAttributeYesNoValue(sourceLineNumber, attribute);
                             break;
+                        case "IgnoreErrors":
+                            ignoreErrors = Core.GetAttributeYesNoValue(sourceLineNumber, attribute);
+                            break;
                         default:
                             Core.UnexpectedAttribute(sourceLineNumber, attribute);
                             break;
@@ -111,6 +115,7 @@ private void ParseFileElement(XmlNode node)
                 superElementRow[1] = file;
                 superElementRow[2] = arguments;
                 superElementRow[3] = elevated == YesNoType.Yes ? 1 : 0;
+                superElementRow[4] = (ignoreErrors == YesNoType.Yes) ? 1 : 0;
             }
 
             Core.CreateWixSimpleReferenceRow(sourceLineNumber, "CustomAction", "PowerShellFilesImmediate");

PowerShellWixExtension/PowerShellWixExtensionSchema.xsd

@@ -88,6 +88,12 @@
         </xs:annotation>
       </xs:attribute>
 
+      <xs:attribute name="IgnoreErrors" use="optional" default="no" type="wix:YesNoType">
+        <xs:annotation>
+          <xs:documentation>Set to true to ignore PowerShell errors</xs:documentation>
+        </xs:annotation>
+      </xs:attribute>
+
     </xs:complexType>
   </xs:element>
 </xs:schema>

PowerShellWixExtension/TableDefinitions.xml

@@ -61,6 +61,16 @@
   nullable="no"
   description="Run as elevated" />
 
+    <columnDefinition
+  name="IgnoreErrors"
+  type="number"
+  category="integer"
+  length="0"
+   minValue="0"
+   maxValue="1"
+  nullable="no"
+  description="When non-zero, PowerShell errors are ignored." />
+
   </tableDefinition>
 
 </tableDefinitions>