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# =============================================================================
# Multi-stage Dockerfile Example
# =============================================================================
# This is a simple Dockerfile that will build an image of scratch-base image.
# Usage:
# docker build -t simple:local . && docker run --rm simple:local
# =============================================================================
# -----------------------------------------------------------------------------
# Build Stage
# -----------------------------------------------------------------------------
FROM golang:alpine AS build
# Important:
# Because this is a CGO enabled package, you are required to set it as 1.
ENV CGO_ENABLED=1
RUN apk add --no-cache \
# Important: required for go-sqlite3
gcc \
# Required for Alpine
musl-dev
WORKDIR /workspace
COPY . /workspace/
RUN \
go mod init github.com/mattn/sample && \
go mod tidy && \
go install -ldflags='-s -w -extldflags "-static"' ./simple.go
RUN \
# Smoke test
set -o pipefail; \
/go/bin/simple | grep 99\ こんにちは世界099
# -----------------------------------------------------------------------------
# Main Stage
# -----------------------------------------------------------------------------
FROM scratch
COPY --from=build /go/bin/simple /usr/local/bin/simple
ENTRYPOINT [ "/usr/local/bin/simple" ]
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