Hi, When changing serialization version from 1.0-M1-1.4.0-rc that was release with Kotlin 1.4.0 to 1...

# serialization

[RedTahr1]

Hi,
When changing serialization version from 1.0-M1-1.4.0-rc that was release with Kotlin 1.4.0 to 1.0.1 , Gradle says

Failed to resolve: org.jetbrains.kotlinx:kotlinx-serialization-runtime:1.0.1

Isn't this available on jcenter? or what should I do?

[Karlo Lozovina]

there was some renaming going on, here's how I use it:

implementation("org.jetbrains.kotlinx", "kotlinx-serialization-core", "1.0.1")
implementation("org.jetbrains.kotlinx", "kotlinx-serialization-json", "1.0.1")

[Karlo Lozovina]

I think JSON part is optional, but I keep it anyway

[Karlo Lozovina]

and of course, you need a plugin, I think that remained the same

kotlin("plugin.serialization") version "1.4.21"

[RedTahr1]

Thanks, it seem like I can find the org.jetbrains.kotlinxkotlinx serialization core1.0.1

[Vampire]

https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md#100-rc--2020-08-17

[Vampire]

The id of the core artifact with @Serializable annotation and Json format was changed from kotlinx-serialization-runtime to kotlinx-serialization-core to be more clear and aligned with other kotlinx libraries.

[Vampire]

https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md#100-rc2--2020-09-21

[Vampire]

In 1.0.0-RC2, Json class and related entities are located in kotlinx-serialization-json artifact. To migrate, simply replace kotlinx-serialization-core dependency with -json. Core library then will be included automatically as the transitive dependency.

For most use-cases, you should use new kotlinx-serialization-json artifact. Use kotlinx-serialization-core if you are writing a library that depends on kotlinx.serialization in a format-agnostic way of provides its own serial format.

[RedTahr1]

I see that I need to use kotlinx-serialization-json since I otherwis cannot find imports for Json. Is there any harm to include both when not writing library?

[RedTahr1]

I think, you answered the important question with the link to changelog. Do as I should, and skip the unneeded "if"s

[Vampire]

My opinion is, if you don't use a class from the core artifact, don't declare it as dependencey.
If you use a class from the core artifact explicitly, then also declare a dependency and don't just rely on it being present transitively.