builder-jammy-tiny need support LANG environment

[lmm1990]

Describe the Enhancement

support environment
--env BPE_LC_ALL=en_US.utf8
--env BPE_LANG=en_US.utf8 \

Motivation

i have a springboot project,The configuration is as follows

bootBuildImage {
    imageName = "registry.cn-shanghai.aliyuncs.com/metafusion/rta-data-statistics:$version"
    builder = "paketobuildpacks/builder-jammy-tiny:latest"
    runImage = "paketobuildpacks/run-jammy-tiny:latest"
    environment.put("BP_JVM_VERSION","17")
    publish = true
    docker {
        host = "tcp://192.168.0.140:2375"
        tlsVerify = false
        publishRegistry {
            username = "***"
            password = "***"
            url = "***"
        }
    }
}

tiny image Unsupported utf8

[dmikusa]

The current documented behavior is to not set a locale, see https://paketo.io/docs/howto/configuration/#configuring-locale. It doesn't mean you can't set one, you just need to do it.

Having a default locale that's set in the image would be difficult because there's not one locale for everyone (that's kind of the purpose of a locale), so regardless of what we'd pick it's not going to be correct for some set of people. Not setting one provides some basic support through POSIX, but requires you to pick a locale that makes sense for you.

[lmm1990]

The problem is that the builder jammy tiny does not have a UTF-8 local

[dmikusa]

I bumped into this recently and I am seeing what the reporter mentioned now. I did a little poking around and it looks like at a minimum, the locale binary is not present in the tiny image. I tried to invoke that from my application to inspect the environment and it failed unable to find it.

It is doing the locale generation in the build image here, but I don't see that in the run image.

@paketo-buildpacks/stacks-maintainers - What do you think about this? I have no idea what it would do to the size of the image, adding in the locale info. Would there be interest in adding it?

An example of the impact. If you have a Java application and a class contains a non-ascii character. That application will fail to start on Tiny.