DockerCLI/dockerfiles/Dockerfile.lint

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# syntax=docker/dockerfile:1.1.3-experimental
ARG GO_VERSION=1.12.14
ARG GOLANGCI_LINTER_SHA="v1.21.0"
FROM golang:${GO_VERSION}-alpine AS build
ENV CGO_ENABLED=0
RUN apk add --no-cache git
ARG GOLANGCI_LINTER_SHA
ARG GO111MODULE=on
RUN --mount=type=cache,target=/root/.cache/go-build \
--mount=type=cache,target=/go/pkg/mod \
go get github.com/golangci/golangci-lint/cmd/golangci-lint@${GOLANGCI_LINTER_SHA}
FROM golang:${GO_VERSION}-alpine AS lint
ENV CGO_ENABLED=0
ENV DISABLE_WARN_OUTSIDE_CONTAINER=1
COPY --from=build /go/bin/golangci-lint /usr/local/bin
WORKDIR /go/src/github.com/docker/cli
ENV GOGC=75
ENTRYPOINT ["/usr/local/bin/golangci-lint"]
CMD ["run", "--config=.golangci.yml"]
Do not patch Dockerfiles in CI When building the Dockerfiles for development, those images are mainly used to create a reproducible build-environment. The source code is bind-mounted into the image at runtime; there is no need to create an image with the actual source code, and copying the source code into the image would lead to a new image being created for each code-change (possibly leading up to many "dangling" images for previous code-changes). However, when building (and using) the development images in CI, bind-mounting is not an option, because the daemon is running remotely. To make this work, the circle-ci script patched the Dockerfiles when CI is run; adding a `COPY` to the respective Dockerfiles. Patching Dockerfiles is not really a "best practice" and, even though the source code does not and up in the image, the source would still be _sent_ to the daemon for each build (unless BuildKit is used). This patch updates the makefiles, circle-ci script, and Dockerfiles; - When building the Dockerfiles locally, pipe the Dockerfile through stdin. Doing so, prevents the build-context from being sent to the daemon. This speeds up the build, and doesn't fill up the Docker "temp" directory with content that's not used - Now that no content is sent, add the COPY instructions to the Dockerfiles, and remove the code in the circle-ci script to "live patch" the Dockerfiles. Before this patch is applied (with cache): ``` $ time make -f docker.Makefile build_shell_validate_image docker build -t docker-cli-shell-validate -f ./dockerfiles/Dockerfile.shellcheck . Sending build context to Docker daemon 41MB Step 1/2 : FROM debian:stretch-slim ... Successfully built 81e14e8ad856 Successfully tagged docker-cli-shell-validate:latest 2.75 real 0.45 user 0.56 sys ``` After this patch is applied (with cache):: ``` $ time make -f docker.Makefile build_shell_validate_image cat ./dockerfiles/Dockerfile.shellcheck | docker build -t docker-cli-shell-validate - Sending build context to Docker daemon 2.048kB Step 1/2 : FROM debian:stretch-slim ... Successfully built 81e14e8ad856 Successfully tagged docker-cli-shell-validate:latest 0.33 real 0.07 user 0.08 sys ``` Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2018-11-28 19:06:10 -05:00
COPY . .