out-of-the-box monodoc-http fails to show documentation

[Lucy Llewellyn]

The out-of-the-box configuration for monodoc-http, which is pulled by installing mono-complete, does not find any documentation. It is configured to look for documentation at /mono/lib/monodoc-ios/ and reports an HTTP 500 error when trying to navigate to http://localhost:8084/monodoc.

----
System.ArgumentException
basedir
Parameter name: Base documentation directory at '/mono/lib/monodoc-ios/' doesn't exist
Description: HTTP 500.Error processing request.

Details: Non-web exception. Exception origin (name of application or object): monodoc.

Exception stack trace:
  at Monodoc.RootTree.LoadTree (System.String basedir, System.Boolean includeExternal) [0x00031] in <496c0b0510da4601a8fa1704154167ef>:0
  at Mono.Website.Global.Application_Start () [0x0002d] in <b585f8eef00841eab80ae6a6ea48bfd2>:0
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00038] in <8f2c484307284b51944a1a13a14c0266>:0
----

Should the documentation path be changed? what to? Should we change monodoc-http to ensure it depends upon an appropriate documentation package to provide the path that the server is configured to serve? Or should we do both?

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: monodoc-http 4.2-2.2
ProcVersionSignature: Ubuntu 4.18.0-13.14-generic 4.18.17
Uname: Linux 4.18.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Jan 11 17:06:25 2019
InstallationDate: Installed on 2018-12-13 (28 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
PackageArchitecture: all
SourcePackage: mono-tools
UpgradeStatus: No upgrade log present (probably fresh install)

[Lucy Llewellyn (lucyllewy)]

Also affects xenial, though mono-complete does not install the monodoc-http package as a dependency. I needed to manually install monodoc-http after mono-complete to test whether it failed.

[Lucy Llewellyn (lucyllewy)]

Also affects bionic. Unlike xenial mono-complete DOES pull monodoc-http by default.

[Lucy Llewellyn (lucyllewy)]

Also affects disco. mono-complete DOES pull monodoc-http by default here, too.