RedundantTargetPlatform - Buildkit

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