This should resolve#791.
Instead of checking if `Assembly.Load` returned null (it doesn't), check
if it threw `FileNotFoundException`, which it will if it doesn't find
the assembly.
The primary reason to do this is that the VS Code debugger is not
compatible with rc2.
Secondarily, we want to continue tracking CoreCLR/FX master branch,
which means to continue with the latest release candidates. Since we are
releasing in August, we will be able to pick up the converged RTM
version before release.
The only advantage of rc2 is that it is frozen; but we have this anyway
because we snap to particular builds.
All libraries now use the framework `netstandard1.5`, and import the
`dnxcore50` and `portable` frameworks. The app that is published,
Microsoft.PowerShell.Linux.Host, that is, the top-level dependency that
emits an executable, instead targets `netstandardapp1.5` and has a new
`runtimes` key so that .NET CLI's `restore` and `publish` commands know
which runtime implementations to resolve.
When switching to the new CLI, we needed to fix how we specified our
dependencies. In particular, the .NET CLI team helped me figure out how
to download packages that are reference assembly only on Linux, with
implementations on Windows. The result of this is the new `frameworks`
setup.
Additionally, we were incorrectly specifying our build dependencies;
that is, projects we also build (not packages). The solution was much
cleaner. We removed the `type: build` section and replaced it with the
version `1.0.0-*` that all our projects currently use.
The `project.json` files also had their names, descriptions,
indentation, and versions fixed.
The build scripts were simplified.
The packages are now dependencies of the `dnxcore50` framework itself,
rather than globally. The `compilationOptions` were pruned, with
`CORECLR` moved to frameworks, `_CORECLR` removed for all but
`Management.Infrastructure`, and `LINUX` moved to a new `Linux`
configuration, used only in `build.sh`. This configuration is
purposefully absent from libraries that do not use `LINUX`, so that it
is not relied upon without strong consideration. The dependencies
were pruned to reduce duplication.
Andrew Schwartzmeyer