Hi There,
I am attempted to have Capistrano tasks only display the commands instead
of executing them. I did this by basically using a function which
determines if the command needs to be executed or printed based on a
'debug' flag passed as an argument which would be accessed as a environment
variable, however I encountered some exceptions:
What I've done:
def execute_as cmd
if $debug.eql? 'true'
puts cmd
else
execute "#{cmd}"
end
The above works fine for all except for the following scenario:
# fails for any test command
if test(" [ ! -d /usr/backup ] ")
puts "+ Creating backup point /usr/backup.."
execute_as "sudo mkdir /usr/backup"
puts "#{$checkmark} Created /usr/backup"
end
The exception below is:
1. Only generated when it encounters the first test command.
2. Does not terminate. Prints all command successfully until the end.
DEBUG[ba34641c] Command: [ ! -d /usr/backup ]
Exception `Net::SSH::Exception' at
/opt/ruby/ruby-2.0.0-p451/usr/lib64/ruby/gems/2.0.0/gems/net-ssh-2.9.1/lib/net/ssh/transport/algorithms.rb:329
- could not settle on language_client algorithm
Exception `Net::SSH::Exception' at
/opt/ruby/ruby-2.0.0-p451/usr/lib64/ruby/gems/2.0.0/gems/net-ssh-2.9.1/lib/net/ssh/transport/algorithms.rb:329
- could not settle on language_server algorithm
Exception `Net::SSH::Authentication::DisallowedMethod' at /opt/ruby/ruby-2.0
.0-p451/usr/lib64/ruby/gems/2.0.0/gems/net-ssh-2.9.1/lib/net/ssh/
authentication/methods/none.rb:23 - Net::SSH::Authentication::
DisallowedMethod
Exception `TypeError' at
/opt/ruby/ruby-2.0.0-p451/usr/lib64/ruby/gems/2.0.0/gems/net-ssh-2.9.1/lib/net/ssh/authentication/agent/socket.rb:65
- no implicit conversion of nil into String
Exception `Net::SSH::Authentication::AgentNotAvailable' at
/opt/ruby/ruby-2.0.0-p451/usr/lib64/ruby/gems/2.0.0/gems/net-ssh-2.9.1/lib/net/ssh/authentication/agent/socket.rb:68
- no implicit conversion of nil into String
I can SSH into the remote server successfully and if the debug option is
off, no exceptions are generated.
A closer look led me to change the environment variable name (instead of
using 'debug') which solved the problem.
I was hoping someone could explain this behavior?
Thanks.
Versions:
- Ruby 1.8.7
- Capistrano 3
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