Another related question if I configure my environments like Pants #general

Another related question, if I configure my enviro...

powerful-eye-58407

07/14/2023, 7:35 AM

Another related question, if I configure my environments like that:

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local_environment(
    name="linux_compatible",
    compatible_platforms=["linux_x86_64"],
    fallback_environment="test_run_env",
)

docker_environment(
    name="test_run_env",
    image="test-run-env:v1",
)

this means that on linux mentioned component tests will on host, but on MacOS they will run in container. This means that

SERVICE_HOST

variable set in component tests needs to vary, depending on the environment (local, or fallback one)

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python_tests(
    name="tests",
    environment="linux_compatible",
    extra_env_vars=[
        "SERVICE_HOST=localhost/host.docker.internal",
        ...
    ],
)

Is there a way of achieving that without defining

test_extra_env_vars

docker_environment

to override

SERVICE_HOST

? That environment is shared between various tests for different services, I wanted to keep only one local+docker env setup to keep things simple, but it looks like I'd have to define separate environment setup for each service that I want to test?

powerful-eye-58407

07/14/2023, 10:02 AM

ok, I think that's actually not possible... I wanted a setup like this (it's a monorepo built with pants):

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common/
   ...
services/
    service1/
        tests/
            BUILD #1
services/
    service2/
        tests/
            BUILD #2
pants.toml

with BUILD 1:

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python_tests(
    extra_env_vars=[
        "SERVICE1_HOST=localhost",
    ]
)

local_environment(
    name="service1_linux",
    compatible_platforms=["linux_x86_64"],
    fallback_environment="service1_docker",
)

docker_environment(
    name="service1_docker",
    image="...",
    test_extra_env_vars=[
        "SERVICE1=host.docker.internal",
    ]   
)

and BUILD2

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python_tests(
    extra_env_vars=[
        "SERVICE2_HOST=localhost",
    ]
)

local_environment(
    name="service2_linux",
    compatible_platforms=["linux_x86_64"],
    fallback_environment="service2_docker",
)

docker_environment(
    name="service2_docker",
    image="...",
    test_extra_env_vars=[
        "SERVICE2=host.docker.internal",
    ]   
)

but pants complain about multiple local environments and that's ambiguous to pick which one to run?...

powerful-eye-58407

07/14/2023, 11:27 AM

OK I've ended up using

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python_tests(
    extra_env_vars=[
        "SERVICE1_HOST=" + env("LOCALHOST_NAME"),
    ]
)

and running pants via bash script that populates LOCALHOST_NAME to either "localhost" or "host.docker.internal" on mac...

powerful-eye-58407

07/14/2023, 11:28 AM

I'd much rather have this variable defined in local/docker environment somehow, but it looks like env() always reads from host (which makes sense)

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