Support ${@} in Duckscript tasks

[MartinKavik]

Feature Description

Support ${@} in Duckscript tasks

Describe The Solution You'd Like

It would be nice to use ${@} in tasks written in Duckscript to pass an array of task arguments.

Code Sample

My current ugly task definition:

[tasks.in_examples]
description = '''
Run chosen task for each example in its root.
Ex: 'makers in_examples mzoon -- -V' or `makers in_examples mzoon build"
'''
script = [
'''
#!@duckscript
handle = glob_array examples/*/Makefile.toml
for path in ${handle}
    example_root = dirname ${path}
    echo Example root: ${example_root}
    if is_defined 5
        exec --fail-on-error makers --cwd ${example_root} ${1} ${2} ${3} ${4} ${5}
    elseif is_defined 4
        exec --fail-on-error makers --cwd ${example_root} ${1} ${2} ${3} ${4}
    elseif is_defined 3
        exec --fail-on-error makers --cwd ${example_root} ${1} ${2} ${3}
    elseif is_defined 2
        exec --fail-on-error makers --cwd ${example_root} ${1} ${2}
    elseif is_defined 1
        exec --fail-on-error makers --cwd ${example_root} ${1}
    else
        exec --fail-on-error makers --cwd ${example_root}
    end
end
'''
]

The future refactored code with #{@}:

[tasks.in_examples]
description = '''
Run chosen task for each example in its root.
Ex: 'makers in_examples mzoon -- -V' or `makers in_examples mzoon build"
'''
script = [
'''
#!@duckscript
handle = glob_array examples/*/Makefile.toml
for path in ${handle}
    example_root = dirname ${path}
    echo Example root: ${example_root}
    exec --fail-on-error makers --cwd ${example_root} ${@}
end
'''
]

---

Related question:
Can we somehow use an array as arguments? E.g. exec --fail-on-error makers --cwd ${example_root} ..${arr}

Thank you.

[sagiegurari]

good idea. I'll check it out. should be simple.

as for the array question, use %{array} instead of ${array}

[sagiegurari]

for the array, just to be clear you first need to join to a string using space char and than do that which will split it to args via spaces.
if you need an example tell me.

[MartinKavik]

for the array, just to be clear you first need to join to a string using space char and than do that which will split it to args via spaces.

args = array ${1} ${2} ${3} ${4} ${5}
args_string = array_join ${args} " "
# ...
   exec --fail-on-error makers --cwd ${example_root} %{args_string}

^ this seems to work. ${x}s are still ugly but the code is much better now. Thanks.

[sagiegurari]

@MartinKavik this is now released. if there are issues feel free to reopen. thanks for the idea.