Get --dart-define environment variables in native iOS and Android

Question

I am trying to find a way to access the environment variables provided by --dart-define inside native iOS and Android code.

Is there any way to do this?

I have tried the guide explained in https://binary-studio.com/2020/06/23/flutter-3/ but that doesn't work as what gets written to the generated .xcconfig is not separated by = but instead by %3D. And I get the error

error: .../ios/Flutter/DEFINEEnvironment.xcconfig:2: expected a ‘=’, but found % (in target 'Runner' from project 'Runner')

The file DEFINEEnvironment.xcconfig gets generated with the following content MY_VAR%3DMY_VALUE instead of MY_VAR=MY_VALUE

UPDATE

This seems to be happening because when reading from the args passed to --dart-define it must be encoding = into %3D. And I don't know how prevent that from happening

Hi) sorry for this confusion) I've updated article on medium long time ago, and even published a new article regarding changes in 1.20) but for some reason article in our blog still wasn't updated ( — tatsuDn
– tatsuDn, Commented Mar 3, 2021 at 9:14

tapizquent · Accepted Answer · 2021-01-05 05:58:04Z

1

It seems that the script has been changed and now includes the necessary code to decode the strings.

The post-action script that needs to be added to Scheme is:

function urldecode() { : "${*//+/ }"; echo "${_//%/\\x}"; }

IFS=',' read -r -a define_items <<< "$DART_DEFINES"


for index in "${!define_items[@]}"
do
    define_items[$index]=$(urldecode "${define_items[$index]}");
done

printf "%s\n" "${define_items[@]}" > ${SRCROOT}/Flutter/DEFINEEnvironment.xcconfig

answered Jan 5, 2021 at 5:58

tapizquent

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