fix various build issues

.goreleaser.yaml

@@ -106,14 +106,16 @@ dockers_v2:
     dockerfile: Dockerfile.alpine
     flags:
       - "--pull"
+      # provenance attestations break the multi-arch manifest for armv6/armv7/386
+      - "--provenance=false"
     ids:
       - linux
       - docker-entrypoint
     platforms:
       - linux/amd64
       - linux/arm64
-      - linux/armv6
-      - linux/armv7
+      - linux/arm/v6
+      - linux/arm/v7
       - linux/386
 
   - id: scratch
@@ -128,14 +130,16 @@ dockers_v2:
     dockerfile: Dockerfile.scratch
     flags:
       - "--pull"
+      # provenance attestations break the multi-arch manifest for armv6/armv7/386
+      - "--provenance=false"
     ids:
       - linux
       - docker-entrypoint
     platforms:
       - linux/amd64
       - linux/arm64
-      - linux/armv6
-      - linux/armv7
+      - linux/arm/v6
+      - linux/arm/v7
       - linux/386
 
 brews:

Dockerfile.alpine

@@ -4,9 +4,10 @@ RUN apk --no-cache add tini ca-certificates curl bash rclone openssh tzdata dock
     rclone selfupdate --stable
 RUN mkdir -p /tmp
 
-# Copy the binary we built via goreleaser
-COPY backrest /backrest
-COPY docker-entrypoint /docker-entrypoint
+ARG TARGETPLATFORM
+# Binaries are staged per-platform by goreleaser dockers_v2
+COPY $TARGETPLATFORM/backrest /backrest
+COPY $TARGETPLATFORM/docker-entrypoint /docker-entrypoint
 
 # Run the binary to install dependencies (may run via QEMU but necessary)
 RUN /backrest --install-deps-only

Dockerfile.scratch

@@ -3,8 +3,9 @@ FROM alpine:latest AS alpine
 RUN apk add --no-cache ca-certificates tini-static
 RUN mkdir /tmp-orig
 
-# Copy binary from goreleaser to run install-deps
-COPY backrest /backrest
+ARG TARGETPLATFORM
+# Binaries are staged per-platform by goreleaser dockers_v2
+COPY $TARGETPLATFORM/backrest /backrest
 RUN /backrest --install-deps-only
 
 # Setup restic path
@@ -20,9 +21,9 @@ COPY --from=alpine /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=alpine /bin/restic /bin/restic
 COPY --from=alpine /sbin/tini-static /tini
 
-# Copy binaries from goreleaser
-COPY backrest /backrest
-COPY docker-entrypoint /docker-entrypoint
+ARG TARGETPLATFORM
+COPY $TARGETPLATFORM/backrest /backrest
+COPY $TARGETPLATFORM/docker-entrypoint /docker-entrypoint
 
 ENTRYPOINT ["/tini", "--", "/docker-entrypoint"]
 CMD ["/backrest"]