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docker-google-lighthouse

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Google Lighthouse - Docker Image

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> [!CAUTION]
> As-of 2021, this product does not have a free support team anymore. If you want this product to be maintained, please support my work.
 
> [!NOTE]
> (This product is available under a free and permissive license, but needs financial support to sustain its continued improvements. In addition to maintenance and stability there are many  desirable features yet to be added.)
 
> [!TIP]
> THIS REPOSITORY IS AUTO-UPDATED BY [GITHUB-RELEASE-NOTIFIER](https://github.com/femtopixel/github-release-notifier) (https://github.com/femtopixel/github-release-notifier)

![logo](https://raw.githubusercontent.com/femtopixel/docker-google-lighthouse/master/logo.png)

Google Lighthouse - Docker Image
================================

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[Lighthouse](https://developers.google.com/web/tools/lighthouse/) analyzes web apps and web pages, collecting modern performance metrics and insights on developer best practices.

This image is greatly inspired from [Justin RIBEIRO's work](https://github.com/justinribeiro/dockerfiles/tree/master/lighthouse)

Usage
-----

```
docker run --rm --name lighthouse -it -v /path/to/your/report:/home/chrome/reports femtopixel/google-lighthouse <your_site_url> <optional_args>
```

With `<you_site_url>` url to your site (e.g. http://www.google.com). You can pass args **AFTER** the `url` if you want to.

For example, you can export as json with this command:

```
docker run --rm --name lighthouse -it -v /path/to/your/report:/home/chrome/reports femtopixel/google-lighthouse http://www.google.com --output json
```

You can specify `CHROME_FLAGS` environment variable (`-e` parameter in your docker command) to be used in chrome-flags parameter. (default: `--headless --disable-gpu --no-sandbox`)

Further reading on [Google Lighthouse](https://github.com/GoogleChrome/lighthouse/blob/master/docs/readme.md#using-programmatically)

FAQ
---

* Error while writing files
```
Runtime error encountered: { Error: EACCES: permission denied, open '/home/chrome/reports/myawesome_site_admin_heavypage.report.json'
errno: -13,
code: 'EACCES',
syscall: 'open',
path: '/home/chrome/reports/myawesome_site_admin_heavypage.report.json' }
```
Make sure your folder has the write right for others (chmod o+w)

If the issue still occurs, you may want to add `--disable-shm-dev-usage` Chrome flag (cf. https://stackoverflow.com/questions/69173469/meaning-of-selenium-chromeoptions/69175552#69175552 and https://issues.chromium.org/issues/40517415; thx @kevinbreit - https://github.com/femtopixel/docker-google-lighthouse/issues/25)

You can add this flag with the `-e` flag in your docker command `docker run --rm --name lighthouse -it -e CHROME_FLAGS="--headless --disable-gpu --no-sandbox --ignore-certificate-errors --disable-dev-shm-usage --allow-insecure-localhost --silent" -v /path/to/your/report:/home/chrome/reports femtopixel/google-lighthouse http://www.google.com --output json`

docker-google-lighthouse

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