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Patch looks great!

Reviews applied: [57926]

Passed command: export OS='ubuntu:14.04' BUILDTOOL='autotools' COMPILER='gcc' CONFIGURATION='--verbose' ENVIRONMENT='GLOG_v=1 MESOS_VERBOSE=1'; ./support/docker-build.sh

- Mesos Reviewbot


On March 24, 2017, 11:48 p.m., Andrew Schwartzmeyer wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/57926/
> -----------------------------------------------------------
> 
> (Updated March 24, 2017, 11:48 p.m.)
> 
> 
> Review request for mesos, John Kordich, James Peach, Joseph Wu, Li Li, and Michael Park.
> 
> 
> Bugs: MESOS-7307
>     https://issues.apache.org/jira/browse/MESOS-7307
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Commit 5f159cdcb introduced `return Error(...)` logic to functions
> which return `bool`, not `Try<bool>`, which broke the Windows build.
> 
> Furthermore, in the instances of `isdir` and `isfile`, erroring when
> asked to not follow a symlink is not correct. The semantics of symlinks
> provide clear answers to `isdir` and `isfile` when the target is a link,
> and is not being followed (it is neither a regular file nor a directory).
> 
> We explicitly match the POSIX semantics for `isfile` where `S_IFREG`
> returns `false` for symbolic links.
> 
> For the functions `mode` and `dev`, which return types wrapped by `Try`,
> we should only error if asked not to follow symlinks, and the target is
> actually a symlink. If it is not a symlink to begin with, we should not
> prematurely error. If it is a symlink, we should error because there is
> no equivalent of `lstat` on Windows to obtain `st_mode` or `st_dev` of a
> symlink itself.
> 
> 
> Diffs
> -----
> 
>   3rdparty/stout/include/stout/os/windows/stat.hpp 8587341282ca2d596a2b6f23f84b84a00053c3d5 
> 
> 
> Diff: https://reviews.apache.org/r/57926/diff/2/
> 
> 
> Testing
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> 
> Build on Windows and run stout-tests.exe
> 
> 
> Thanks,
> 
> Andrew Schwartzmeyer
> 
>