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From: Sebastian Gniazdowski <sgniazdowski@gmail.com>
Date: Sun, 11 Sep 2016 11:14:42 +0200
Message-ID: <CAKc7PVDQO=udSMmV4prxOh05M1JmBV7cw_nVZ4eRE1BPPADOUQ@mail.gmail.com>
Subject: Re: fc -ap -R stalls when called from sched
To: Zsh hackers list <zsh-workers@zsh.org>
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PS. The commit with debug marks etc. is: 001a537

Best regards,
Sebastian Gniazdowski


On 11 September 2016 at 11:01, Sebastian Gniazdowski
<sgniazdowski@gmail.com> wrote:
> PS. Thought that I could provide a minimum test case. However, following:
>
> myfunction() { local -a arr; fc -ap -R ~/.zshrc; arr=( ${history[@]}
> ); print -rl -- "Read:" "${(@)arr[1,3]}"; }
> sched +1 myfunction
>
> works fine...
>
>
> On 11 September 2016 at 10:58, Sebastian Gniazdowski
> <sgniazdowski@gmail.com> wrote:
>> Hello,
>> I call function __convey_on_period_passed() from sched +1 mechanism.
>> There, I read an IO file (file used for data conveying). I use the
>> neat trick that worked for me in past, but not now:
>>
>>     # Read input using history mechanism
>>     local -a commands
>>     () { fc -ap -R "$datafile"; commands=( ${history[@]} ) }
>>
>> Shell stalls for ~10 seconds, then continues with data correctly read.
>> Whole source with debug marks is here:
>>
>> https://github.com/psprint/zconvey/blob/001a5378177dcfdd0de388e19f5c7ca067c0a89c/zconvey.plugin.zsh#L174-L183
>>
>> Asciinema showing the effect:
>>
>> https://asciinema.org/a/9mfxg2j1jcwvoo7tb5x6bagr4
>>
>> Removing anonymous function doesn't help. Doing normal load via
>> commands=( "${(@f)"$(<$datafile)"}" ) does help.
>>
>>
>> The plugin is for: a) assigning IDs and names to Zsh sessions b) doing
>> "zconvey -n Devel vim ~/.zshrc" to fire up command on Zsh session
>> named "Devel" (not implemented yet, thus a manual print -rl -- is used
>> to fill IO file).
>>
>> Best regards,
>> Sebastian Gniazdowski