434: added a set of Dockerfile-based end-to-end tests to check build tools get installed

test/end-to-end/Dockerfile

@@ -0,0 +1,22 @@
+FROM boxproject/box:4.6.10 AS build_pie_phar
+RUN apk add git
+COPY . /app
+RUN cd /app && touch creating_this_means_phar_will_never_be_verified && /box.phar compile
+
+FROM alpine AS test_pie_installs_build_tools_on_alpine
+RUN apk add php php-phar php-mbstring php-iconv php-openssl bzip2-dev libbz2
+COPY --from=build_pie_phar /app/pie.phar /usr/local/bin/pie
+RUN pie install --auto-install-build-tools -v php/bz2
+RUN pie show
+
+FROM fedora AS test_pie_installs_build_tools_on_fedora
+RUN dnf install -y php php-pecl-zip unzip bzip2-devel
+COPY --from=build_pie_phar /app/pie.phar /usr/local/bin/pie
+RUN pie install --auto-install-build-tools -v php/bz2
+RUN pie show
+
+FROM ubuntu AS test_pie_installs_build_tools_on_ubuntu
+COPY --from=build_pie_phar /app/pie.phar /usr/local/bin/pie
+RUN apt-get update && apt-get install -y php unzip libbz2-dev
+RUN pie install --auto-install-build-tools -v php/bz2
+RUN pie show

test/end-to-end/dockerfile-e2e-test.sh

@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+cd "$(dirname "$0")/../../"
+
+E2E_PATH="$(dirname "$0")"
+DOCKERFILE="$E2E_PATH/Dockerfile"
+
+if [[ ! -f "$DOCKERFILE" ]]; then
+  echo "Dockerfile not found: $DOCKERFILE" >&2
+  exit 1
+fi
+
+# Make a list of the build targets starting with test_
+mapfile -t TARGETS < <(awk '
+  tolower($1) == "from" {
+    for (i = 1; i <= NF; i++) {
+      if (tolower($i) == "as" && i < NF) {
+        t = $(i+1)
+        if (substr(t,1,5) == "test_") print t
+      }
+    }
+  }
+' "$DOCKERFILE")
+
+if [[ ${#TARGETS[@]} -eq 0 ]]; then
+  echo "No test_ targets found in $DOCKERFILE" >&2
+  exit 1
+fi
+
+# If a specific target is provided as an argument, run only that target
+if [[ $# -gt 0 ]]; then
+  REQUESTED_TARGET="$1"
+  # Verify the requested target exists among discovered test_ targets
+  found=false
+  for t in "${TARGETS[@]}"; do
+    if [[ "$t" == "$REQUESTED_TARGET" ]]; then
+      found=true
+      break
+    fi
+  done
+  if [[ $found == false ]]; then
+    echo "Requested target '$REQUESTED_TARGET' not found in $DOCKERFILE" >&2
+    echo "Available test_ targets:" >&2
+    for t in "${TARGETS[@]}"; do
+      echo "  - $t" >&2
+    done
+    exit 1
+  fi
+  TARGETS=("$REQUESTED_TARGET")
+fi
+
+PASSED=()
+FAILED=()
+
+for TARGET in "${TARGETS[@]}"; do
+  echo "🧪 Running $TARGET"
+  LOGFILE="$E2E_PATH/$TARGET.out"
+  # Stream to console and to the logfile
+  if docker buildx build --target="$TARGET" --file "$DOCKERFILE" . |& tee "$LOGFILE"; then
+    PASSED+=("$TARGET")
+    echo "✅ Passed $TARGET"
+    rm "$LOGFILE"
+  else
+    FAILED+=("$TARGET")
+    echo "❌ Failed $TARGET" >&2
+  fi
+  echo
+done
+
+echo "================ Summary ================"
+echo "Total: ${#TARGETS[@]}  |  Passed: ${#PASSED[@]}  |  Failed: ${#FAILED[@]}"
+if [[ ${#FAILED[@]} -gt 0 ]]; then
+  echo "Failed targets:" >&2
+  for f in "${FAILED[@]}"; do
+    echo "  - $f" >&2
+  done
+  exit 1
+fi
+
+echo "All test targets passed."