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RedundantTargetPlatform

_vendor/github.com/moby/buildkit/frontend/dockerfile/docs/rules/redundant-target-platform.md

18.09-release636 B
Original Source

Output

text
Setting platform to predefined $TARGETPLATFORM in FROM is redundant as this is the default behavior

Description

A custom platform can be used for a base image. The default platform is the same platform as the target output so setting the platform to $TARGETPLATFORM is redundant and unnecessary.

Examples

❌ Bad: this usage of --platform is redundant since $TARGETPLATFORM is the default.

dockerfile
FROM --platform=$TARGETPLATFORM alpine AS builder
RUN apk add --no-cache git

✅ Good: omit the --platform argument.

dockerfile
FROM alpine AS builder
RUN apk add --no-cache git