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[Proposal] Expose the container name in remoteEnv

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#778 0 comentarios 0 reacciones 0 asignados Ver en GitHub

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Evaluación

Dificultad
5/5
Tiempo estimado
Más de una semana
Aptitud para principiantes
15/100
Tipo de issue
Nueva funcionalidad
Claridad
Bastante claro
Estado de actividad
Activo
Stack tecnológico
docker, docker-compose

Línea de trabajo

This is a specification proposal, so there are no code files yet; the relevant text is the remoteEnv and variable-substitution sections of the devcontainer.json spec. Read the related issues linked in the body (spec #184 and #692) to see what has already been decided about container naming. Done means a written proposal that defines when ${containerName} is resolved, covers Docker Compose primary services, and is discussed by maintainers.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

A process running in a devcontainer may need its container’s runtime name for logging or tracking purposes. Today, there is no way to reference that name in remoteEnv. The name field in devcontainer.json is a display name and may differ from the name shown by Docker or Podman.

Add a ${containerName} variable that can be used in remoteEnv:

{
  "remoteEnv": {
    "DEVCONTAINER_CONTAINER_NAME": "${containerName}"
  }
}

${containerName} should resolve to the actual runtime name of the primary development container. It should work for both newly created and reused containers, including the primary service in a Docker Compose setup. The tool should resolve it before running lifecycle commands or starting other processes to which remoteEnv applies.

This does not change how containers are named. Because the value is only known after container creation, ${containerName} would not be available in creation-time settings such as containerEnv or runArgs.

Related requests: container name in devcontainer.json (https://github.com/devcontainers/spec/issues/184) and a CLI option to choose the name (https://github.com/devcontainers/spec/issues/692).

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