On Nov 16, 2011, at 1:15 AM, Donovan Bray wrote:
> I'm not sure why you need to use a lambda then force it to memoize the
> return.
>
> Why doesn't this work for you?
>
> set(:user) {Capistrano::CLI.ui.ask("Your SSH User name : ")}
>
> on first use it will ask; then return the same value every time it's used
> thereafter
----
Lee suggested using a lambda and I was running with it but alas, it doesn't
seem to have any impact on my problem.
I am gathering now that my problem is that each 'fork' of a new cap process
will have its own variables so even though it's all contained in a single
'deploy' file, the separate processes each have their own environment and
perhaps the only way around it is to create a local 'settings' file (possibly
at the start of each run and nuke it at the end).
Perhaps I should restate the problem...
I have various namespaces & tasks in one deploy.rb
namespace 'deploy' do
task :tag do
end
task :code do
system "cap #{stage} i18n:tag deploy"
end
task :i18n do
system "cap #{stage} i18n:tag deploy"
end
...
end
namespace 'code' do
...
end
namespace 'i18n' do
...
end
>
> And on scoping global variables. That's method_missing at work not variable
> scoping.
>
> If you create a local variable of the same name as a capistrano config
> variable, ruby will use that local variable. But if there is no local
> variable of the same name ruby tries method_missing defined on the instance;
> and you are in an instance of Capistrano::Configuration when defining tasks;
> which then attempts to find a matching config variable and returns that if
> found. If not ruby keeps walking up the class inheritance tree until it
> finally tries Object#method_missing if that fails then you finally get a no
> method error
>
> You can still get at a config value if you've defined a local variable of the
> same name.
>
> set :user, 'foo'
>
> p user # => foo
>
> begin
> user = 'bar'
> p user # => bar
> p fetch(:user) # => foo
> end
>
> p user # => foo
>
>
>
> On Nov 15, 2011, at 2:54 PM, Craig White <[email protected]> wrote:
>
>> On Nov 15, 2011, at 1:42 PM, Craig White wrote:
>>
>>>
>>> On Nov 15, 2011, at 10:56 AM, Lee Hambley wrote:
>>>
>>>> I meant, by "written long form" that it wasn't valid syntax… but it was
>>>> supposed to be easier to understand:
>>>>
>>>> set(:branch, lambda { .... })
>>>>
>>>> is the required way...
>>> ----
>>> something about capistrano makes global variables local and makes me
>>> crazy...
>>>
>>> set(:user, lambda do
>>> if $my_user == nil then
>>> $my_user = Capistrano::CLI.ui.ask("Your SSH User name : ")
>>> else
>>> $my_user
>>> end
>>> end)
>>>
>>> and if any 'task' has multiple deploys or invoked before/after tasks that
>>> call :user a second time, I am still asked for the user name a second time.
>> ----
>> same result as a one-liner too... ;-(
>>
>> set(:user, lambda { $my_user == nil ? $my_user =
>> Capistrano::CLI.ui.ask("Your SSH User name : ") : $my_user } )
>>
>> Craig
>>
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