Fix: Rollback to kumina/postfix_exporter

.github/actions/build-postfix-exporter/action.yaml

@@ -19,9 +19,9 @@ runs:
     - name: Checkout
       uses: actions/checkout@v4
       with:
-        repository: Hsn723/postfix_exporter # Hsn723 repo is actually being updated
+        repository: kumina/postfix_exporter
         path: 'postfix_exporter'
-        ref: 'v0.7.0' # Latest commit we know that works
+        ref: 'a6f58e9b2b2b4decc7e65c5a34b4fd53cd6665f1' # Latest commit we know that works
 
     - name: Apply patches
       shell: bash
@@ -68,11 +68,7 @@ runs:
         push: true
         tags: '${{ inputs.tags }}'
         labels: ${{ steps.meta.outputs.labels }}
-        # linux/arm/v5 and linux/arm/v6 are not supported anymore by upstream Go docker images.
-        # Technically, we could build them but we would need to bootstrap the whole Go compiler.
-        # However, I'm not sure if it's worth it.
-        platforms: "linux/amd64,linux/arm/v7,linux/arm64/v8,linux/mips64le,linux/ppc64le,linux/s390x"
-        # linux/386,linux/arm/v6,linux/arm64,linux/riscv64"
+        platforms: "linux/amd64,linux/arm/v5,linux/arm/v7,linux/arm64/v8,linux/mips64le,linux/ppc64le,linux/s390x"
         cache-from: type=local,src=/tmp/.buildx-cache/postfix-exporter,mode=max,compression=estargz
         cache-to: type=local,dest=/tmp/.buildx-cache-new/postfix-exporter
 

README.md

@@ -131,7 +131,7 @@ Several potentially "surprising" changes went into this issue and hence warrant
 - **[`master`](https://github.com/bokysan/docker-postfix/tree/master/) branch now builds images called [`edge`](https://hub.docker.com/r/boky/postfix/tags?page=1&name=edge)**. 
   `latest` images are built from the last tag. We've had several issues with people using the `latest` tag
   and reporting problems. You can now rely on `latest` being the latest stable release.
-- Image now builds its own version of [postfix-exporter](https://github.com/hsn723/postfix_exporter) and relies on this
+- Image now builds its own version of [postfix-exporter](https://github.com/kumina/postfix_exporter) and relies on this
   third-party project. Checkout is from master branch, based
   on specific SHA commit id. The same hash is used for master and tags.
 - **Architecture galore!** With the addition of debian images, we now support support more architectures than ever. The list includes: 

postfix-exporter-01.patch

@@ -1,34 +1,25 @@
 diff --git a/Dockerfile b/Dockerfile
-index 75a22d8..81145c9 100644
+index a3327d8..1cdfa84 100644
 --- a/Dockerfile
 +++ b/Dockerfile
-@@ -1,8 +1,41 @@
--FROM scratch
+@@ -1,4 +1,10 @@
+-FROM golang:1.16 AS builder
 +# syntax=docker/dockerfile:1.2
-+FROM golang:1.23 AS builder
- LABEL org.opencontainers.image.source="https://github.com/hsn723/postfix_exporter" \
-         org.opencontainers.image.authors="Hsn723" \
-         org.opencontainers.image.title="postfix_exporter"
++FROM golang:1.21.3-bookworm AS builder
 +ARG TARGETPLATFORM
 +ARG TARGETOS
 +ARG TARGETARCH
 +ARG TARGETVARIANT
 +
-+WORKDIR /src
-+
-+# avoid downloading the dependencies on successive builds
-+RUN apt-get update -qq && apt-get install -qqy \
-+  build-essential \
-+  libsystemd-dev
-+
-+COPY go.mod go.sum ./
-+RUN go mod download
-+RUN go mod verify
-+
-+COPY . .
-+
-+# Force the go compiler to use modules
-+ENV GO111MODULE=on
+ WORKDIR /src
+ 
+ # avoid downloading the dependencies on succesive builds
+@@ -14,10 +20,18 @@ COPY . .
+ 
+ # Force the go compiler to use modules
+ ENV GO111MODULE=on
+-RUN go test
+-RUN go build -o /bin/postfix_exporter
 +# go test fails (sometimes) because it relies on an external dependency:
 +#
 +# warning: SASL authentication failure: cannot connect to saslauthd server: Permission denied
@@ -39,12 +30,10 @@ index 75a22d8..81145c9 100644
 +# Hence disabling the test here.
 +# RUN go test
 +RUN env GOOS="${TARGETOS}" GOARCH="${TARGETARCH}" GOARM="$( echo "$TARGETVARIANT" | grep -E -o "\\d+$")" go build -ldflags '-extldflags "-static"'  -o /bin/postfix_exporter
-+
+ 
+-FROM debian:latest
 +FROM scratch
  EXPOSE 9154
--COPY postfix_exporter /
--COPY LICENSE /
--ENTRYPOINT ["/postfix_exporter"]
-+WORKDIR /
-+COPY --from=builder /bin/postfix_exporter /bin/
-+ENTRYPOINT ["/bin/postfix_exporter"]
+ WORKDIR /
+ COPY --from=builder /bin/postfix_exporter /bin/
+