Global array actually not available

Global array actually not available

[Sebastian Gniazdowski]

Hello

In code, I declare reply2 and reply3 as arrays via typeset -ga. I do
this from inside of a function. When the code returns to outer scope,
(t)reply2 and (t)reply3 show empty strings. The following lines start
at line 293 in lib/script_functions:

    typeset -ga reply2 reply3
    echo "T1 ${(t)reply} T2 ${(t)reply2} T3 ${(t)reply3}"
    reply=( "${existing[@]}" )
    reply2=( "${files[@]}" )
    reply3=( "${sections[@]}" )

This is inner scope. The outer scope (line 1148 in zsh-select-zekyll) does:

    filter_for_existing_zekylls "${zekylls[@]}"
    three_to_section_order "${#reply}" "${reply[@]}" "${reply2[@]}"
"${reply3[@]}"

    echo "t1 ${(t)reply} t2 ${(t)reply2} t3 ${(t)reply3}"
    local -a existing files sections
    existing=( "${reply[@]}" )
    files=( "${reply2[@]}" )
    sections=( "${reply3[@]}" )

    echo "existing count: ${#existing}, files count: ${#files},
sections count: ${#sections}"

t1-t3 show empty string. Assigning ${reply2[@]} to files=( ... ) cause
the variable files to contain one mysterious element – it is empty,
probably.


To run the code first download zekyll, the investigation branch:
https://github.com/psprint/zekyll/tree/investig

it has to be unpacked to ~/.zekyll, final directory "zekyll", so full
path ~/.zekyll/zekyl. One can also use install script:

    wget https://github.com/psprint/zekyll/blob/master/install.sh
    sh ./install.sh

Next, one also needs a zkl repository available under
~/.zekyll/repos/{the-zkl-repo} or somewhere else (the path below after
-mp must match). It can be downloaded from:

    https://github.com/psprint/zkl

After that, simply run command:

zkview -mp "/Users/sgniazdowski/github/zkl.git" --zkl
aaaaabaacaadaaeaafaagaahaaiaajaakaalaamaanaaoaap

Errorneous output will be created:

Read: aaaaabaacaadaaeaafaagaahaaiaajaakaalaamaanaaoaap

Checking current zekyll for duplicates...

T1  T2 array T3 array
-> aaa.A--Mainly_Exports
-> aab.A--Setopts_all
-> aad.B--Autoloads_tools_binds
-> aac.C--Bindkeys
-> aaf.D--Old_functions
-> aae.E--Aliases_all
-> aag.F--Tools_functions
-> aah.F--Other_functions
-> aaj.F--Off
-> aai.G--Hack
-> aak.H--Zplugin
-> aal.H--Zsh_navigation_tools
-> aam.I--Zstyles
-> aap.J--Completion
-> aan.K--Prompt_selection_final_setup
-> aao.L--Very_final
t1  t2  t3
existing count: 1, files count: 1, sections count: 1


Best regards,
Sebastian Gniazdowski

Re: Global array actually not available

[Sebastian Gniazdowski]

Sorry apparently I missed the fact that zkview runs two programs,
itself and zsh-select-zekyll. Maybe I will clarify what can be wrong
if at all.

Best regards,
Sebastian Gniazdowski


On 30 June 2016 at 16:34, Sebastian Gniazdowski <sgniazdowski@gmail.com> wrote:
> Hello
>
> In code, I declare reply2 and reply3 as arrays via typeset -ga. I do
> this from inside of a function. When the code returns to outer scope,
> (t)reply2 and (t)reply3 show empty strings. The following lines start
> at line 293 in lib/script_functions:
>
>     typeset -ga reply2 reply3
>     echo "T1 ${(t)reply} T2 ${(t)reply2} T3 ${(t)reply3}"
>     reply=( "${existing[@]}" )
>     reply2=( "${files[@]}" )
>     reply3=( "${sections[@]}" )
>
> This is inner scope. The outer scope (line 1148 in zsh-select-zekyll) does:
>
>     filter_for_existing_zekylls "${zekylls[@]}"
>     three_to_section_order "${#reply}" "${reply[@]}" "${reply2[@]}"
> "${reply3[@]}"
>
>     echo "t1 ${(t)reply} t2 ${(t)reply2} t3 ${(t)reply3}"
>     local -a existing files sections
>     existing=( "${reply[@]}" )
>     files=( "${reply2[@]}" )
>     sections=( "${reply3[@]}" )
>
>     echo "existing count: ${#existing}, files count: ${#files},
> sections count: ${#sections}"
>
> t1-t3 show empty string. Assigning ${reply2[@]} to files=( ... ) cause
> the variable files to contain one mysterious element – it is empty,
> probably.
>
>
> To run the code first download zekyll, the investigation branch:
> https://github.com/psprint/zekyll/tree/investig
>
> it has to be unpacked to ~/.zekyll, final directory "zekyll", so full
> path ~/.zekyll/zekyl. One can also use install script:
>
>     wget https://github.com/psprint/zekyll/blob/master/install.sh
>     sh ./install.sh
>
> Next, one also needs a zkl repository available under
> ~/.zekyll/repos/{the-zkl-repo} or somewhere else (the path below after
> -mp must match). It can be downloaded from:
>
>     https://github.com/psprint/zkl
>
> After that, simply run command:
>
> zkview -mp "/Users/sgniazdowski/github/zkl.git" --zkl
> aaaaabaacaadaaeaafaagaahaaiaajaakaalaamaanaaoaap
>
> Errorneous output will be created:
>
> Read: aaaaabaacaadaaeaafaagaahaaiaajaakaalaamaanaaoaap
>
> Checking current zekyll for duplicates...
>
> T1  T2 array T3 array
> -> aaa.A--Mainly_Exports
> -> aab.A--Setopts_all
> -> aad.B--Autoloads_tools_binds
> -> aac.C--Bindkeys
> -> aaf.D--Old_functions
> -> aae.E--Aliases_all
> -> aag.F--Tools_functions
> -> aah.F--Other_functions
> -> aaj.F--Off
> -> aai.G--Hack
> -> aak.H--Zplugin
> -> aal.H--Zsh_navigation_tools
> -> aam.I--Zstyles
> -> aap.J--Completion
> -> aan.K--Prompt_selection_final_setup
> -> aao.L--Very_final
> t1  t2  t3
> existing count: 1, files count: 1, sections count: 1
>
>
> Best regards,
> Sebastian Gniazdowski

Re: Global array actually not available

[Bart Schaefer]

On Jun 30,  4:34pm, Sebastian Gniazdowski wrote:
}
} In code, I declare reply2 and reply3 as arrays via typeset -ga. I do
} this from inside of a function. When the code returns to outer scope,
} (t)reply2 and (t)reply3 show empty strings.

I see your follow-up in which it appears this may be attributable to
separate shell processes, but in addition please note that typeset -g
does not actually declare a "global" variable (despite the mnemonic).
It merely declares a "non-local" variable.  The actual dynamic scope
of the variable will be the nearest surrounding scope in which that
parameter's name is already defined (even if both defined AND unset;
in the unset case it may become set again, but it's scope remains).

Thus "typeset -g name" declares a true global $name only when there
is not another $name already declared (or $name is already global,
of course).