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# Contributing Guidelines
## Pull Request Conventions
It's encouraged to discuss proposed changes prior to opening a PR, especially when the change is large.
Pull request subjects should have the same format as the [Commit Message Header](#commit-message-header).
### Documentation / Specifications
You should include reference documentation specifically if there is a section in the W3C Webauthn specification that
relates to your pull request and explain in the PR how it implements the spec or implements the spec more closely.
### Force Push
Force pushing once a pull request has been opened is heavily frowned upon. All pull requests will be merged using
`git merge --squash` to avoid cluttering the master branch history with changes made during the review process. As such
the only purpose force pushing to a branch once a pull request is opened is making it harder for reviewers to review
your code; especially if a review has already taken place or has been started.
## Commit Message Convention
_This specification is inspired by and supersedes the [AngularJS commit message format][commit-message-format]. This
is an adapted version of the [Angular commit guidelines]._
We have very precise rules over how our Git commit messages must be formatted.
This format leads to **easier to read commit history**.
Each commit message consists of a **header**, a **body**, and a **footer**.
```
<header>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>
```
The `header` is mandatory and must conform to the [Commit Message Header](#commit-message-header) format.
The `body` is mandatory for all commits except for those of type "docs". When the body is present it must be at least 20
characters long and must conform to the [Commit Message Body](#commit-message-body) format.
The `footer` is optional. The [Commit Message Footer](#commit-message-footer) format describes what the footer is used
for and the structure it must have.
#### Commit Message Header
```
<type>(<scope>): <short summary>
│ │ │
│ │ └─⫸ Summary in present tense. Not capitalized. No period at the end.
│ │
│ └─⫸ Commit Scope: metadata|protocol|webauthn
│
└─⫸ Commit Type: build|ci|docs|feat|fix|perf|refactor|test
```
The `<type>` and `<summary>` fields are mandatory, the `(<scope>)` field is optional.
##### Type
Must be one of the following:
* **build**: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
* **ci**: Changes to our CI configuration files and scripts (examples: CircleCi, SauceLabs)
* **docs**: Documentation only changes
* **feat**: A new feature
* **fix**: A bug fix
* **perf**: A code change that improves performance
* **refactor**: A code change that neither fixes a bug nor adds a feature
* **revert**: Revert a commit
* **release**: Publish a release
* **test**: Adding missing tests or correcting existing tests
##### Scope
The scope should be the name of the npm package affected (as perceived by the person reading the changelog generated
from commit messages).
The following is the list of supported scopes:
* `metadata`
* `protocol`
* `webauthn`
##### Summary
Use the summary field to provide a succinct description of the change:
* use the imperative, present tense: "change" not "changed" nor "changes"
* don't capitalize the first letter
* no dot (.) at the end
#### Commit Message Body
Just as in the summary, use the imperative, present tense: "fix" not "fixed" nor "fixes".
Explain the motivation for the change in the commit message body. This commit message should explain _why_ you are
making the change. You can include a comparison of the previous behavior with the new behavior in order to illustrate
the impact of the change.
#### Commit Message Footer
The footer can contain information about breaking changes and deprecations and is also the place to reference GitHub
issues and other PRs that this commit closes or is related to.
For example:
```
BREAKING CHANGE: <breaking change summary>
<BLANK LINE>
<breaking change description + migration instructions>
<BLANK LINE>
<BLANK LINE>
Fixes #<issue number>
```
or
```
DEPRECATED: <what is deprecated>
<BLANK LINE>
<deprecation description + recommended update path>
<BLANK LINE>
<BLANK LINE>
Closes #<pr number>
```
Breaking Change section should start with the phrase "BREAKING CHANGE: " followed by a summary of the breaking change,
a blank line, and a detailed description of the breaking change that also includes migration instructions.
Similarly, a Deprecation section should start with "DEPRECATED: " followed by a short description of what is deprecated,
a blank line, and a detailed description of the deprecation that also mentions the recommended update path.
### Revert commits
If the commit reverts a previous commit, it should begin with `revert: `, followed by the header of the reverted commit.
The content of the commit message body should contain:
- information about the SHA of the commit being reverted in the following format: `This reverts commit <SHA>`,
- a clear description of the reason for reverting the commit message.
[commit-message-format]: https://docs.google.com/document/d/1QrDFcIiPjSLDn3EL15IJygNPiHORgU1_OOAqWjiDU5Y/edit#
[Angular commit guidelines]: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
|
