Luke Boswell (Feb 27 2023 at 07:09): Luke Boswell (Feb 27 2023 at 07:09):I've been experimenting with URL packages and made this example using Json which I think is pretty neat. If anyone runs this please lets me know; I'm interested know if the Json URL pacakge works for you!
Try running both roc run and roc test... just copy and paste below into a .roc file and it should just work :fingers_crossed:
app "example"
packages {
cli: "https://github.com/roc-lang/basic-cli/releases/download/0.2.1/wx1N6qhU3kKva-4YqsVJde3fho34NqiLD3m620zZ-OI.tar.br",
json: "https://asdfasdf23452.s3.ap-southeast-2.amazonaws.com/cdKMia6cwdRG6Gb0SfXP8cgGF7yTz-i959FV6ZfuS0E.tar.br",
}
imports [
cli.Stdout,
json.Core.{ Json, toUtf8, fromUtf8 },
Decode,
]
provides [main] to cli
main = Stdout.line "Hello \(person.name)!"
Person : {
name : Str,
}
inputStr : Str
inputStr = "{\"name\":\"John Smith\"}"
person : Person
person =
inputStr
|> Str.toUtf8
|> Decode.fromBytes fromUtf8
|> Result.onErr \_ -> crash "bad decode"
|> Result.withDefault { name: "" }
outputStr : Str
outputStr =
person
|> Encode.toBytes toUtf8
|> Str.fromUtf8
|> Result.onErr \_ -> crash "bad encode"
|> Result.withDefault ""
expect outputStr == inputStr
luke@192-168-1-104 examples % roc run hello-world.roc
Hello John Smith!
luke@192-168-1-104 examples % roc test hello-world.roc
0 failed and 1 passed in 637 ms.
Everything worked as expected on Ubuntu 20.04 :)
Richard Feldman (Feb 27 2023 at 13:52):worked for me on macOS Monterey 12.6.3!
Last updated: Jul 26 2025 at 12:14 UTC