Added force parameter to buildrunner and metadatarunner

src/Cake.DocFx.Tests/Build/DocFxBuildRunnerTests.cs

@@ -103,6 +103,22 @@ public void Should_Add_Serve_To_Arguments_If_True()
                 // Then
                 Assert.Equal("build --serve", result.Args);
             }
+
+            [Fact]
+            public void Should_Add_Force_To_Arguments_If_True()
+            {
+                // Given
+                var fixture = new DocFxBuildRunnerFixture
+                {
+                    Settings = {Force = true}
+                };
+
+                // When
+                var result = fixture.Run();
+
+                // Then
+                Assert.Equal("build --force", result.Args);
+            }
         }
     }
 }

src/Cake.DocFx.Tests/Metadata/DocFxMetadataRunnerTests.cs

@@ -73,6 +73,22 @@ public void Should_Not_Add_LogLevel_To_Arguments_If_Default()
                 // Then
                 Assert.Equal("metadata", result.Args);
             }
+
+            [Fact]
+            public void Should_Add_Force_To_Arguments_If_True()
+            {
+                // Given
+                var fixture = new DocFxMetadataRunnerFixture
+                {
+                    Settings = {Force = true}
+                };
+
+                // When
+                var result = fixture.Run();
+
+                // Then
+                Assert.Equal("metadata --force", result.Args);
+            }
         }
     }
 }

src/Cake.DocFx/Build/DocFxBuildRunner.cs

@@ -70,6 +70,11 @@ private ProcessArgumentBuilder GetArguments(FilePath configFile, DocFxBuildSetti
                 builder.Append("--serve");
             }
 
+            if (settings.Force)
+            {
+                builder.Append("--force");
+            }
+
             return builder;
         }
     }

src/Cake.DocFx/Build/DocFxBuildSettings.cs

@@ -45,5 +45,10 @@ public class DocFxBuildSettings : ToolSettings
         /// in a built in web server. 
         /// </summary>
         public bool Serve { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether all the documentation is re-build.
+        /// </summary>
+        public bool Force { get; set; }
     }
 }

src/Cake.DocFx/Metadata/DocFxMetadataRunner.cs

@@ -56,6 +56,11 @@ private ProcessArgumentBuilder GetArguments(DocFxMetadataSettings settings)
                 builder.Append("--logLevel \"{0}\"", settings.LogLevel);
             #endregion
 
+            if (settings.Force)
+            {
+                builder.Append("--force");
+            }
+
             return builder;
         }
     }

src/Cake.DocFx/Metadata/DocFxMetadataSettings.cs

@@ -35,5 +35,10 @@ public class DocFxMetadataSettings : ToolSettings
         /// Gets or sets to which log level will be logged.
         /// </summary>
         public DocFxLogLevel LogLevel { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether all the documentation is re-build.
+        /// </summary>
+        public bool Force { get; set; }
     }
 }