tests: Add integration test script for containertool --resource

Author: euanh

.github/workflows/integration_tests.yml

@@ -35,6 +35,28 @@ jobs:
               run: |
                   swift test
 
+    containertool-resources-test:
+        name: Containertool resources test
+        runs-on: ubuntu-latest
+        services:
+            registry:
+                image: registry:2
+                ports:
+                    - 5000:5000
+        steps:
+            - name: Checkout repository
+              uses: actions/checkout@v4
+              with:
+                  persist-credentials: false
+
+            - name: Mark the workspace as safe
+              # https://github.com/actions/checkout/issues/766
+              run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
+
+            - name: Check plugin streaming output is reassembled and printed properly
+              run: |
+                  scripts/test-containertool-resources.sh
+
     plugin-streaming-output-test:
         name: Plugin streaming output test
         runs-on: ubuntu-latest

scripts/test-containertool-resources.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+##===----------------------------------------------------------------------===##
+##
+## This source file is part of the SwiftContainerPlugin open source project
+##
+## Copyright (c) 2025 Apple Inc. and the SwiftContainerPlugin project authors
+## Licensed under Apache License v2.0
+##
+## See LICENSE.txt for license information
+## See CONTRIBUTORS.txt for the list of SwiftContainerPlugin project authors
+##
+## SPDX-License-Identifier: Apache-2.0
+##
+##===----------------------------------------------------------------------===##
+
+log() { printf -- "** %s\n" "$*" >&2; }
+error() { printf -- "** ERROR: %s\n" "$*" >&2; }
+fatal() { error "$@"; exit 1; }
+
+set -euo pipefail
+
+RUNTIME=${RUNTIME-"docker"}
+PKGPATH=$(mktemp -d)
+
+#
+# Package an example payload with resources.  This test only checks
+# that the correct files are in the container image and does not run
+# it, so the payload does not need to be an executable.
+#
+touch "$PKGPATH/hello"
+mkdir -p "$PKGPATH/resourcedir"
+touch "$PKGPATH/resourcedir/resource1.txt" "$PKGPATH/resourcedir/resource2.txt" "$PKGPATH/resourcedir/resource3.txt"
+touch "$PKGPATH/resourcefile.dat"
+swift run containertool \
+   "$PKGPATH/hello" \
+   --repository localhost:5000/resource_test \
+   --from scratch \
+   --resources "$PKGPATH/resourcedir" \
+   --resources "$PKGPATH/resourcefile.dat"
+
+$RUNTIME rm -f resource-test
+$RUNTIME create --pull always --name resource-test localhost:5000/resource_test:latest
+
+cleanup() {
+  log "Deleting temporary package $PKGPATH"
+  rm -rf "$PKGPATH"
+
+  log "Deleting resource-test container"
+  $RUNTIME rm -f resource-test
+}
+trap cleanup EXIT
+
+
+for resource in \
+   /hello \
+   /resourcedir/resource1.txt \
+   /resourcedir/resource2.txt \
+   /resourcedir/resource3.txt \
+   /resourcefile.dat
+do
+   # This will return a non-zero exit code if the file does not exist
+   if $RUNTIME cp resource-test:$resource - > /dev/null ; then
+     log "$resource: OK"
+   else
+     fatal "$resource: FAILED"
+   fi
+done
+