Rye:Err is raised when a ssh command returns 1

[hamann]

Hi,

I'm playing with rye and discovered that rye behaves differently when executing commands local or via ssh

>> a = Rye.shell 'test','-d /bins'
=> [, , 1, ]
>> box = Rye::Box.new('localhost')
=> #<Rye::Box:localhost name=localhost cwd= umask= env="" safe=true opts={:port=>nil, :keys=>["/Users/hamann/.ssh/id_rsa"], :paranoid=>true} keys=["/Users/hamann/.ssh/id_rsa"]>
>> box.disable_safe_mode
false
>> box.execute 'test', '-d /bins'
Rye::Err:  (cmd: test -d /bins; status: 1)
    from /Users/hamann/workspace/sauspiel/barmaid/vendor/bundle/ruby/1.9.1/gems/rye-0.9.8/lib/rye/box.rb:858:in `rescue in run_command'
    from /Users/hamann/workspace/sauspiel/barmaid/vendor/bundle/ruby/1.9.1/gems/rye-0.9.8/lib/rye/box.rb:809:in `run_command'
    from /Users/hamann/workspace/sauspiel/barmaid/vendor/bundle/ruby/1.9.1/gems/rye-0.9.8/lib/rye/box.rb:473:in `method_missing'
    from (irb):9
    from /Users/hamann/.rbenv/versions/1.9.3-p392/bin/irb:12:in `<main>'

Why does rye raise an exception when I want to check if a directory exists?

[delano]

I chose to return an exception for non-zero exit codes to avoid any ambiguity around successes and failures. Ideally Rye.shell would be consistent with that, but the class usage is kind of a special case in the sense that it's really only used as a replacement for backticks or Kernel.cmd.

disable_safe_mode only affects the whitelist and escaping (e.g. globs, tildas, etc). Would a disable_exceptions method solve your problem?

[rrepen]

Hi,

I hit this problem with the "ps" command when I wanted to see if a
process existed or not and ps return -1 when it does not found the
process, which in my case, I was expecting.

To handle that I had to add an exception handler.

I would prefer to get the same as under the shell, with no output in my
case and the exit status set to -1 and no exception.

Don't know if this is possible under Rye.

Best regards
René PENNARUN

On 03/29/2013 06:13 PM, Delano Mandelbaum wrote:

I chose to return an exception for non-zero exit codes to avoid any
ambiguity around successes and failures. Ideally Rye.shell would be
consistent with that, but the class usage is kind of a special case in
the sense that it's really only used as a replacement for backticks or
|Kernel.cmd|.

|disable_safe_mode| only affects the whitelist and escaping (e.g.
globs, tildas, etc). Would a |disable_exceptions| method solve your
problem?

—
Reply to this email directly or view it on GitHub
#31 (comment).

[hamann]

Yes, disabling exception based on command return codes would resolve it. Thanks!

[hamann]

What's about raising an exception when stderr isn't empty?

[hamann]

mixlib-shellout e.g. has a method 'error!' which does exactly that, raise an exception when stderr isn't empty, but that has to be called explicitly, bound to the command called before. I think such an approach makes more sense => let the user decide when an exit code <> 0 is really critical or an exception

[ianneub]

👍

[nco-webdev]

Is there a fix for that issue now ? I'm trying to delete an unexisting file and I want to handle exception by my self but the stderr is always printed in my shell. I would just like to hide it and display a custom error message in place of.
A clue ?

[delano]

@Hito01 You can pass the option :error => false to Rye::Box.new to avoid printing the STDERR.

[nco-webdev]

Well, I already tried this :
Rye::Box.new(host, safe: false, user: 'root', :error => false)

But the error is still displayed in my terminal.
$box.git "clone", "foo@git.bar.net:#{options[:g]} "

Here is the command that I try to execute. In fact the repository doesn't exist and so I get something like :
Access denied.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

Where am I wrong ?

[delano]

You can also try adding an exception hook for the Exception class which does nothing but return.

See:

• https://github.com/delano/rye/blob/master/lib/rye/box.rb#L526
• https://github.com/delano/rye/blob/master/lib/rye/box.rb#L839