% in multiline bash string leads to error

[Andreas Kapp]

I have this 'demo.jsonnet' file which I call like this (you have to create the target folder): 

jsonnet demo.jsonnet -S -m target

{

[host]: |||

#!/bin/bash

# This is %(h)s file

# SET timestamp

export TIMESTAMP=$(date +%F)

echo $TIMESTAMP

||| % { h: host } for host in ['demo.sh']

}

It produces this error:

jsonnet demo.jsonnet -S -m target

RUNTIME ERROR: Mapping keys required.

        <std>:712:15-45 thunk <f> from <function <format_codes_obj>>

        <std>:726:38-39 thunk from <thunk <val> from <function <format_codes_obj>>>

        <std>:1185:24-25        thunk from <function <anonymous>>

        <std>:1185:5-32 function <anonymous>

        <std>:726:16-40 thunk <val> from <function <format_codes_obj>>

        <std>:734:27-30 thunk from <thunk <s> from <function <format_codes_obj>>>

        <std>:585:21-24 thunk from <function <format_code>>

        <std>:585:12-25 function <format_code>

        <std>:734:15-50 thunk <s> from <function <format_codes_obj>>

        ...

        <std>:465:12-13 function <aux>

        <std>:469:7-17  function <padding>

        <std>:473:7-38  function <pad_left>

        <std>:739:15-35 thunk <s_padded> from <function <format_codes_obj>>

        <std>:740:51-59 thunk from <function <format_codes_obj>>

        <std>:740:11-60 function <format_codes_obj>

        <std>:745:7-43  function <anonymous>

        <std>:225:7-23  function <anonymous>

        During manifestation

When I remove the % sign from the bash date function it works as expected.

Bug or feature?

Thanks, Andreas

[Dave Cunningham]

You need to do $(date +%%F)

What's happening is it is interpreting it as %F (i.e. floating point) but since you're doing % { ... } it's saying that the format specified %F does not have a mapping key, it's expecting it to be %(foo)F

The error message could be better!

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[Andreas Kapp]

Shouldn't every evaluation in a string happen only inside %()?

i'm happy I have a solution for this. Thanks.

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