[camera] Introduce camera_web package

[bselwe]

Adds camera_web plugin, serves as a starting point for the Web platform implementation of camera.

• Create the camera_web package
  • Copy the LICENSE file from the camera package
  • Add a CHANGELOG.md file
  • Define a pubspec.yaml file
  • Create a README.md file
• Create CameraPlugin, the web implementation of the camera platform interface that throws unimplemented error for each method

Part of flutter/flutter#45297

Pre-launch Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• I read the Tree Hygiene wiki page, which explains my responsibilities.
• I read and followed the relevant style guides and ran the auto-formatter. (Note that unlike the flutter/flutter repo, the flutter/plugins repo does use dart format.)
• I signed the CLA.
• The title of the PR starts with the name of the plugin surrounded by square brackets, e.g. [shared_preferences]
• I listed at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the pub versioning philosophy.
• I updated CHANGELOG.md to add a description of the change.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making or feature I am adding, or Hixie said the PR is test exempt.
• All existing and new tests are passing.

[bselwe]

@felangel @ditman

[ditman]

LGTM! Let's get this landed. I've only noted a few changes wrt the 0.0.1 version being too low, and some other nitpicks.

I've checked and the integration tests are already running successfully in the CI of this change, here:

https://cirrus-ci.com/task/6318685427073024?logs=drive#L20

Good stuff!

[felangel]

Left a bunch of minor comments/nits but overall LGTM 🎉

[stuartmorgan]

Per the output:

The license block for these files is missing or incorrect:
/tmp/cirrus-ci-build/packages/camera/camera_web/lib/camera_web.dart

And indeed, that file has no license.

[ditman]

LGTM, my only concern is with publishing to pub a version of the plugin that doesn't do anything. I'll try to see if there's a way of merging this and having the auto-publish code ignore it until at least we have ported over all the functionality of the Photobooth (then we can call that 0.1.0 or whatever we want).

[bselwe]

Sounds good @ditman, thanks!

[stuartmorgan]

LGTM, my only concern is with publishing to pub a version of the plugin that doesn't do anything. I'll try to see if there's a way of merging this and having the auto-publish code ignore it

You could mark it publish_to: none for now in the pubspec, with a comment explaining why.

[ditman]

This needs to be rebased with the latest master, I tried to do it myself but got a permission denied:

dit@dit:~/github/plugins$ git push
ERROR: Permission to VeryGoodOpenSource/plugins.git denied to ditman.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

[felangel]

This needs to be rebased with the latest master, I tried to do it myself but got a permission denied:

dit@dit:~/github/plugins$ git push
ERROR: Permission to VeryGoodOpenSource/plugins.git denied to ditman.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights and the repository exists.

Just added you as a collaborator so you should have permission to push now 👍

[bselwe]

It is rebased and awaits @felangel consent.

[felangel]

@googlebot I consent.

[ditman]

Let's go!