Publish minimal Solana docker images to dockerhub

ci/buildkite-snap.yml

@@ -2,3 +2,6 @@ steps:
   - command: "ci/snap.sh"
     timeout_in_minutes: 40
     name: "snap [public]"
+  - command: "ci/docker-solana/build.sh"
+    timeout_in_minutes: 20
+    name: "docker-solana"

ci/docker-solana/.gitignore

@@ -0,0 +1 @@
+cargo-install/

ci/docker-solana/Dockerfile

@@ -0,0 +1,5 @@
+FROM debian:stretch
+RUN apt update && \
+    apt-get install -y libssl-dev && \
+    rm -rf /var/lib/apt/lists/*
+COPY cargo-install/bin /usr/bin/

ci/docker-solana/README.md

@@ -0,0 +1,5 @@
+## Minimal Solana Docker image
+
+This image is automatically updated by CI
+
+https://hub.docker.com/r/solanalabs/solana/

ci/docker-solana/build.sh

@@ -0,0 +1,37 @@
+#!/bin/bash -ex
+
+cd "$(dirname "$0")"
+eval "$(../channel-info.sh)"
+
+if [[ $BUILDKITE_BRANCH = "$STABLE_CHANNEL" ]]; then
+  CHANNEL=stable
+elif [[ $BUILDKITE_BRANCH = "$EDGE_CHANNEL" ]]; then
+  CHANNEL=edge
+elif [[ $BUILDKITE_BRANCH = "$BETA_CHANNEL" ]]; then
+  CHANNEL=beta
+fi
+
+if [[ -z $CHANNEL ]]; then
+  echo Unable to determine channel to publish into, exiting.
+  exit 0
+fi
+
+rm -rf cargo-install/
+../docker-run.sh solanalabs/rust:1.29.1 \
+  cargo install --path . --root ci/docker-solana/cargo-install
+
+docker build -t solanalabs/solana:$CHANNEL .
+
+maybeEcho=
+if [[ -z $CI ]]; then
+  echo "Not CI, skipping |docker push|"
+  maybeEcho="echo"
+else
+  (
+    set +x
+    if [[ -n $DOCKER_PASSWORD && -n $DOCKER_USERNAME ]]; then
+      echo "$DOCKER_PASSWORD" | docker login --username "$DOCKER_USERNAME" --password-stdin
+    fi
+  )
+fi
+$maybeEcho docker push solanalabs/solana:$CHANNEL