Use a real shell (for command substitution, stream redirects, etc.)

[j-falk]

I am trying to migrate a WooCommerce setup bash script to a blueprint and I have wp-cli commands like the following that don't work:

        {
            "step": "wp-cli",
            "command": "wp option update woocommerce_terms_page_id $(wp post list --pagename='sample-page' --format=ids)"
        },
        {
            "step": "wp-cli",
            "command": "wp option update page_on_front $(wp option get woocommerce_shop_page_id)"
        },
        {
            "step": "wp-cli",
            "command": "wp post update $(wp option get woocommerce_checkout_page_id --format=ids) --post_content='[woocommerce_checkout]'"
        }

When I try to run a blueprint with such a step, eg as the below

{
  "$schema": "https://playground.wordpress.net/blueprint-schema.json",
  "preferredVersions": {
    "php": "8.0",
    "wp": "latest"
  },
  "phpExtensionBundles": [
    "kitchen-sink"
  ],
  "features": {
    "networking": true
  },
  "plugins": [
    "woocommerce"
  ],
  "steps": [
    {
      "step": "setSiteOptions",
      "options": {
        "show_on_front": "page",
        "woocommerce_onboarding_profile": {
          "skipped": true
        },
        "woocommerce_default_country": "SE",
        "woocommerce_currency": "SEK",
        "woocommerce_price_num_decimals": "2"
      }
    },
    {
      "step": "wp-cli",
      "command": "wp transient delete _wc_activation_redirect"
    },
    {
      "step": "wp-cli",
      "command": "wp wc product create --name='Simple product' --sku='simple-product' --regular_price='99.99' --virtual=false --downloadable=false --user='admin'"
    },
    {
      "step": "wp-cli",
      "command": "wp option update woocommerce_terms_page_id $(wp post list --pagename='sample-page' --format=ids)"
    },
    {
      "step": "wp-cli",
      "command": "wp option update page_on_front $(wp option get woocommerce_shop_page_id)"
    },
    {
      "step": "wp-cli",
      "command": "wp post update $(wp option get woocommerce_checkout_page_id --format=ids) --post_content='[woocommerce_checkout]'"
    }
  ],
  "login": true,
  "landingPage": "/wp-admin/admin.php?page=wc-settings&tab=checkout"
}

I get the error:

Error: Error when executing the blueprint step #6 ({"step":"wp-cli","command":"wp option update page_on_front $(wp option get woocommerce_shop_page_id)"}) : PHP.run() failed with exit code 1 and the following output: �[31;1mError:�[0m Too many positional arguments: option get woocommerce_shop_page_id) #!/usr/bin/env php

So I am guessing command substitution like this is not supported in wp-cli steps? Is it something that could be supported and/or do you have any suggestions on how I should go about it instead? Maybe use a php step that does the same thing?

[j-falk]

I managed to rewrite it using runPHP steps instead, as the example below:

        {
            "step": "php",
            "code": "<?php require_once 'wordpress/wp-load.php'; $page = get_page_by_path('sample-page'); if ($page) { update_option('woocommerce_terms_page_id', $page->ID); }"
        },
        {
            "step": "php",
            "code": "<?php require_once 'wordpress/wp-load.php'; $shop_page_id = get_option('woocommerce_shop_page_id'); if ($shop_page_id) { update_option('page_on_front', $shop_page_id); update_option('show_on_front', 'page'); }"
        },
        {
            "step": "php",
            "code": "<?php require_once 'wordpress/wp-load.php'; $checkout_page_id = get_option('woocommerce_checkout_page_id'); if ($checkout_page_id) { wp_update_post(['ID' => $checkout_page_id, 'post_content' => '[woocommerce_checkout]']); }"
        }

But still think it is interesting if command substitution could work.

[adamziel]

@j-falk It would be pretty cool if command substitution worked! The reason it doesn't is that Playground isn't running an actual shell. It can process enough syntax to run simple commands and support proc_open(), but command substitution is not one of them. If there's a compact POSIX wasm or JS shell, it could be a useful addition to the project.