There is no need to store relative path today. But some part of the system does not accept relative path and there is no indication if it is storing full path or not. This is the root cause of https://github.com/dotnet/cli/issues/9319
“someplace” means different full path for Path class on unix and Windows. And the mock file system uses real Path class. Change tests' setup to use essentially “TEMPATH/someplace” instead of “someplace”
On Windows, the Razor server correctly creates the pid file with
`FileAccess.Write` and `FileOptions.DeleteOnClose`. This requires a share mode
of `FileShare.Write | FileShare.Delete` to open. However, the
`dotnet build-server shutdown` command was opening the file with
`FileShare.Read`. As a result, an `IOException` was being thrown and was not
handled.
This change first opens the file with the appropriate share access and also
properly handles a failure to access or read the contents of the pid file.
Additionally, an integration test was added to test that Razor server shutdown
works as expected.
Fixes#9158.
Previously, Razor server discovery for the `build-server shutdown` command was
implemented by invoking MSBuild on a project file in the current directory to
evaluate the path to the Razor server dll. This was problematic since it would
only discover a single running Razor server instance and required that the user
run the `build-server shutdown` command from a specific location.
Razor's server now writes a "pid file" to a well-known location
(`~/.dotnet/pids/build`) which the command can now enumerate to discover, and
shutdown, the running Razor servers.
This commit changes the Razor server discovery to use the pid files and removes
the requirement that users need to run the command in specific directories to
work.
Fixes#9084.
