e2e: add distribution tests

Signed-off-by: Justin Chadwell <me@jedevc.com>

.github/e2e/distribution/env

@@ -0,0 +1,5 @@
+REGISTRY_FQDN=localhost:8080
+REGISTRY_SLUG=localhost:8080/test-docker-action
+
+DISTRIBUTION_HOST=localhost
+DISTRIBUTION_PORT=8080

.github/e2e/distribution/install.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -eu
+
+: "${DISTRIBUTION_VERSION:=registry:2}"
+: "${DISTRIBUTION_HOST:=localhost}"
+: "${DISTRIBUTION_PORT:=8080}"
+
+echo "::group::Starting ${DISTRIBUTION_VERSION}"
+(
+  set -x
+  docker run -d --name registry -p "${DISTRIBUTION_PORT}:5000" "${DISTRIBUTION_VERSION}"
+)
+echo "::endgroup::"

.github/workflows/e2e.yml

@@ -35,6 +35,10 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          -
+            name: Distribution
+            id: distribution
+            type: local
           -
             name: Docker Hub
             registry: ''
@@ -169,7 +173,7 @@ jobs:
             network=host
       -
         name: Login to Registry
-        if: github.event_name != 'pull_request'
+        if: github.event_name != 'pull_request' && env.REGISTRY_USER != ''
         uses: docker/login-action@v2
         with:
           registry: ${{ env.REGISTRY_FQDN || matrix.registry }}