fix: stop installing database clients

scripts/test-install-fixture.sh

@@ -28,6 +28,7 @@ fail() {
   sed -n '/^download_release_url()/,/^}/p' "$ROOT/deploy/install.sh"
   sed -n '/^release_asset_url()/,/^}/p' "$ROOT/deploy/install.sh"
   sed -n '/^download_release_asset()/,/^}/p' "$ROOT/deploy/install.sh"
+  sed -n '/^install_packages()/,/^}/p' "$ROOT/deploy/install.sh"
 } > "$WORK/helpers.sh"
 # shellcheck disable=SC1090,SC1091
 source "$WORK/helpers.sh"
@@ -239,6 +240,26 @@ grep -Fq 'SETUP_WIZARD=${KAIDI_SETUP_WIZARD:-true}' "$ROOT/deploy/install.sh" \
   || fail 'installer must not create a MySQL container'
 ! grep -Fq 'install_docker' "$ROOT/deploy/install.sh" \
   || fail 'installer must not install Docker or MySQL automatically'
+package_log="$WORK/package-manager.log"
+for package_manager in apt-get dnf yum; do
+  package_bin="$WORK/package-manager-$package_manager"
+  mkdir "$package_bin"
+  cat > "$package_bin/$package_manager" <<'SH'
+#!/bin/sh
+printf '%s %s\n' "${0##*/}" "$*" >> "$PACKAGE_LOG"
+SH
+  chmod +x "$package_bin/$package_manager"
+  : > "$package_log"
+  (
+    PATH="$package_bin"
+    PACKAGE_LOG="$package_log"
+    export PATH PACKAGE_LOG
+    install_packages
+  )
+  if grep -Eqi '(^|[[:space:]])(default-mysql-client|mysql(-client|-server)?|mariadb(-client|-server)?)([[:space:]]|$)' "$package_log"; then
+    fail "installer asked $package_manager to install a database package"
+  fi
+done
 grep -Fq 'An external MySQL 8.4 database is required' "$ROOT/deploy/install.sh" \
   || fail 'installer does not require an operator-managed external MySQL database'
 grep -Fq 'KAIDI_RELEASE_TOKEN_FILE' "$ROOT/deploy/install.sh" \