Multi-arch build

.dockerignore

@@ -0,0 +1,2 @@
+Makefile
+README.md

Dockerfile

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-FROM restic/restic:0.15.1
+FROM golang:1.19-alpine AS builder
-RUN apk add --no-cache jq curl
 
-ENTRYPOINT ["/usr/local/bin/backup.sh"]
+ENV RESTIC_VERSION 0.15.1
+
+RUN apk add --no-cache git
+RUN git clone --depth 1 --branch v${RESTIC_VERSION} https://github.com/restic/restic.git /go/src/github.com/restic/restic
+
+WORKDIR /go/src/github.com/restic/restic
+
+RUN go mod download
+RUN go run build.go
+
+FROM alpine:latest AS restic
+
+RUN apk add --update --no-cache ca-certificates fuse openssh-client tzdata jq curl
+
+COPY --from=builder /go/src/github.com/restic/restic/restic /usr/bin
+
+ENTRYPOINT ["/usr/bin/restic"]

Makefile

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+ORG ?= genunix
+VERSION = $(shell grep "ENV RESTIC_VERSION" Dockerfile | awk '{print $$3}')
+PLATFORMS ?= linux/arm/v7,linux/arm64/v8,linux/amd64
+
+build-all: print-version build-version build-latest
+
+print-version:
+	@echo "Building $(ORG)/restic:$(VERSION) for $(PLATFORMS)"
+
+build-version:
+	docker buildx build --push --platform $(PLATFORMS) --tag $(ORG)/restic:$(VERSION) .
+
+build-latest:
+	docker buildx build --push --platform $(PLATFORMS) --tag $(ORG)/restic:latest .

README.md

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+# Restic Docker image
+
+Restic image for various platforms.
+
+## Build
+
+Just run `make` to build and push everything. Check `ORG` and `PLATFORMS`
+variables to customize.