Feature/#1177 docfx helper

src/app/FakeLib/DocFxHelper.fs

@@ -0,0 +1,60 @@
+[<AutoOpen>]
+/// Contains helper functions to run the documentation tool "docfx".
+module Fake.DocFxHelper
+
+open System
+
+/// The parameter type for DocFx.
+type DocFxParams = 
+    { /// The tool path - FAKE tries to find docfx.exe automatically in any sub folder.
+      ToolPath : string
+      /// the DocFxJson Config-File. Default: docs/docfx.json
+      DocFxJson : string
+      /// DocFx WorkingDirectory. Default: docs
+      WorkingDirectory  : string
+      /// Allows to specify a timeout for DocFx. Default: 5 min
+      Timeout : TimeSpan
+      /// Serves the generated documentation on localhost. Default: false
+      Serve : bool
+    }
+
+/// The default parameters
+let DocFxDefaults = 
+    let toolPath = findToolInSubPath "docfx.exe" (currentDirectory @@ "tools" @@ "docfx.msbuild")
+    let docsPath = currentDirectory @@ "docs"
+    { ToolPath = toolPath
+      DocFxJson = docsPath @@ "docfx.json"
+      WorkingDirectory = docsPath
+      Timeout = TimeSpan.FromMinutes 5.
+      Serve = false
+    }
+
+/// Generates a DocFx documentation.
+/// ## Parameters
+///  - `setParams` - Function used to manipulate the default DocFx parameters. See `DocFxDefaults`
+/// ## Sample
+///
+///     DocFx (fun p -> 
+///      { p with 
+///          DocFxJson = "foo" @@ "bar" @@ "docfx.json"
+///          Timeout = TimeSpan.FromMinutes 10.
+///      })
+let DocFx setParams = 
+    let parameters = DocFxDefaults |> setParams
+
+    traceStartTask "DocFx" parameters.DocFxJson
+
+    let serveArg = if parameters.Serve then "--serve" else ""
+    let configArg = parameters.DocFxJson |> FullName
+
+    let args = sprintf "%s %s" configArg serveArg
+
+    if 0 <> ExecProcess (fun info -> 
+          info.FileName <- parameters.ToolPath |> FullName
+          info.Arguments <- args
+          info.WorkingDirectory <- parameters.WorkingDirectory
+        ) parameters.Timeout
+      then failwith "DocFx generation failed."
+
+    traceEndTask "DocFx" parameters.DocFxJson
+

src/app/FakeLib/FakeLib.fsproj

@@ -180,6 +180,7 @@
     <Compile Include="SlackNotificationHelper.fs" />
     <Compile Include="SonarQubeHelper.fs" />
     <Compile Include="AzureKudu.fs" />
+    <Compile Include="DocFxHelper.fs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="ICSharpCode.SharpZipLib">