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<p align="center"> <a href="https://gscan.ghost.org/"> <img src="https://raw.githubusercontent.com/TryGhost/gscan/main/app/public/logo-gscan-black.png" width="216px" alt="Ghost" /> </a> </p>

GScan is a tool for validating Ghost themes. It produces detailed reports of issues where themes need to be modified in order to be compatible with a specific version.

It is actively capable of dealing with the current and last major versions of Ghost (so at the time of writing v4, v3, v2 and v1).

GScan works on a system of rules. Each rule has a way to check whether it passes or fails and has help content which describes how to fix it. Each rule is also marked with an error level:

In addition, an error can be marked as fatal. A fatal error means, left unchecked a Ghost publication would throw 500 errors on certain pages because of the detected out-of-date or erroneous code.

Usage

There are 4 ways to use gscan to validate your theme:

1. Inside Ghost

Gscan is pre-installed in Ghost. If there are theme errors, Ghost will show them on boot in the console logs and in the UI (Ghost Admin).

2. Web usage

Visit https://gscan.ghost.org and upload your zip to our online version of Gscan.

3. CLI usage

Install using yarn / npm:

yarn global add gscan / npm install -g gscan

To run a local directory through the checks:

gscan /path/to/theme/directory

To run a local zip file through the checks:

gscan /path/to/theme.zip -z

By default, GScan scans themes for the latest Ghost version compatibility. You can also specify a Ghost version by using the following parameters (for Ghost 1.0, 2.0, 3.0, 4.0 and 5.0):

--v1 or -1 --v2 or -2 --v3 or -3 --v4 or -4 or --canary --v5 or -5

Use the --canary parameter to check for the upcoming Ghost version.

Examples:

gscan /path/to/theme.zip -z1 - scan a theme in a zip file for Ghost 1.0 compatibility gscan /path/to/theme/directory --v2 - can a theme in a directory for Ghost 2.0 compatibility gscan /path/to/theme/directory --canary - scan a theme for the upcoming version of Ghost

4. Lib usage

Install using yarn/npm and then:

var gscan = require('gscan');

gscan.checkZip({
    path: 'path-to-zip',
    // if you need to check the theme for a different
    // major Ghost version, you can pass it. Currently
    // v1, v2, v3, v4 and canary (v5) are supported. Default is
    // the latest Ghost version 4.0:
    // checkVersion: 'v4',
    name: 'my-theme'
}).then(function (result) {
    console.log(result);
}).catch(function(err) {
    console.log(err);
});

Development

Run in browser (for zip uploads)

Run on command line

Publish

(Core team only)

Tools

When developing new rules or testing gscan following tools are great to have in the toolbelt:

To Do

Copyright & License

Copyright (c) 2013-2023 Ghost Foundation - Released under the MIT license. Ghost and the Ghost Logo are trademarks of Ghost Foundation Ltd. Please see our trademark policy for info on acceptable usage.