build: add .gitmessage file with commit message template (#37951)

Git provides a way to create a commit message template via the `.gitmessage` file.

Introduce an Angular-specific .gitmessage template based on the original Commit Message Guidelines.
https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-guidelines

If this template workflow is proven in practice, we can move the commit message guidelines into the
.gitmessage file to prevent duplication of the content.

This change is a follow up on #37949 and is inspired by info found in the following blog post:
https://thoughtbot.com/blog/better-commit-messages-with-a-gitmessage-template

PR Close #37951
This commit is contained in:
Igor Minar 2020-07-06 19:00:59 -07:00 committed by Andrew Scott
parent f66f4a1b3f
commit 53d4859f48
2 changed files with 235 additions and 50 deletions

145
.gitmessage Normal file
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@ -0,0 +1,145 @@
<type>(<scope>): <summary>
<Describe the motivation behind this change - explain WHY you are making this change. Wrap all lines
at 100 characters.>
Fixes #<issue number>
# ────────────────────────────────────────── 100 chars ────────────────────────────────────────────┤
# Example Commit Messages
# =======================
# ─── Example: Simple refactor ────────────────────────────────────────────────────────────────────┤
# refactor(core): rename refreshDynamicEmbeddedViews to refreshEmbeddedViews
#
# Improve code readability. The original name no longer matches how the function is used.
# ─────────────────────────────────────────────────────────────────────────────────────────────────┤
# ─── Example: Simple docs change ─────────────────────────────────────────────────────────────────┤
# docs: clarify the service limitation in providers.md guide
#
# Fixes #36332
# ─────────────────────────────────────────────────────────────────────────────────────────────────┤
# ─── Example: A bug fix ──────────────────────────────────────────────────────────────────────────┤
# fix(ngcc): ensure lockfile is removed when `analyzeFn` fails
#
# Previously an error thrown in the `analyzeFn` would cause the ngcc process to exit immediately
# without removing the lockfile, and potentially before the unlocker process had been successfully
# spawned resulting in the lockfile being orphaned and left behind.
#
# Now we catch these errors and remove the lockfile as needed.
# ─────────────────────────────────────────────────────────────────────────────────────────────────┤
# ─── Example: Breaking change ────────────────────────────────────────────────────────────────────┤
# feat(bazel): simplify ng_package by dropping esm5 and fesm5
#
# esm5 and fesm5 distributions are no longer needed and have been deprecated in the past.
#
# https://v9.angular.io/guide/deprecations#esm5-and-fesm5-code-formats-in-angular-npm-packages
#
# This commit modifies ng_package to no longer distribute these two formats in npm packages built by
# ng_package (e.g. @angular/core).
#
# This commit intentionally doesn't fully clean up the ng_package rule to remove all traces of esm5
# and fems5 build artifacts as that is a bigger cleanup and currently we are narrowing down the
# scope of this change to the MVP needed for v10, which in this case is 'do not put esm5 and fesm5'
# into the npm packages.
#
# More cleanup to follow: https://angular-team.atlassian.net/browse/FW-2143
#
# BREAKING CHANGE: esm5 and fesm5 format is no longer distributed in Angular's npm packages e.g.
# @angular/core
#
# Angular CLI will automatically downlevel the code to es5 if differential loading is enabled in the
# Angular project, so no action is required from Angular CLI users.
#
# If you are not using Angular CLI to build your application or library, and you need to be able to
# build es5 artifacts, then you will need to downlevel the distributed Angular code to es5 on your
# own.
#
#
# Fixes #1234
# ─────────────────────────────────────────────────────────────────────────────────────────────────┤
# Angular Commit Message Format
# =============================
#
# The full specification of the Angular Commit Message Format can be found at
# https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit
#
# The following is an excerpt of the specification with the most commonly needed info.
#
# Each commit message consists of a *header*, a *body*, and a *footer*.
#
# <header>
# <BLANK LINE>
# <body>
# <BLANK LINE>
# <footer>
#
# The header is mandatory.
#
# The body is mandatory for all commits except for those of scope "docs". When the body is required
# it must be at least 20 characters long.
#
# The footer is optional.
#
# Any line of the commit message cannot be longer than 100 characters.
#
#
# Commit Message Header
# ---------------------
#
# <type>(<scope>): <short summary>
# │ │ │
# │ │ └─⫸ Summary in present tense. Not capitalized. No period at the end.
# │ │
# │ └─⫸ Commit Scope: animations|bazel|benchpress|common|compiler|compiler-cli|core|
# │ elements|forms|http|language-service|localize|platform-browser|
# │ platform-browser-dynamic|platform-server|platform-webworker|
# │ platform-webworker-dynamic|router|service-worker|upgrade|zone.js|
# │ packaging|changelog|dev-infra|docs-infra|migrations|ngcc|ve
# │ https://github.com/angular/angular/blob/master/CONTRIBUTING.md#scope
# │
# └─⫸ Commit Type: build|ci|docs|feat|fix|perf|refactor|style|test
# https://github.com/angular/angular/blob/master/CONTRIBUTING.md#type
#
#
# 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 is also the place to reference
# GitHub issues, Jira tickets, and other PRs that this commit closes or is related to.
#
# ```
# BREAKING CHANGE: <breaking change summary>
# <BLANK LINE>
# <breaking change description + migration instructions>
# <BLANK LINE>
# <BLANK LINE>
# Fixes #<issue 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.
#

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@ -12,9 +12,11 @@ today! As a contributor, here are the guidelines we would like you to follow:
- [Commit Message Guidelines](#commit)
- [Signing the CLA](#cla)
## <a name="coc"></a> Code of Conduct
Help us keep Angular open and inclusive. Please read and follow our [Code of Conduct][coc].
## <a name="question"></a> Got a Question or Problem?
Do not open issues for general support questions as we want to keep GitHub issues for bug reports and feature requests. You've got much better chances of getting your question answered on [Stack Overflow](https://stackoverflow.com/questions/tagged/angular) where the questions should be tagged with tag `angular`.
@ -29,11 +31,13 @@ To save your and our time, we will systematically close all issues that are requ
If you would like to chat about the question in real-time, you can reach out via [our gitter channel][gitter].
## <a name="issue"></a> Found a Bug?
If you find a bug in the source code, you can help us by
[submitting an issue](#submit-issue) to our [GitHub Repository][github]. Even better, you can
[submit a Pull Request](#submit-pr) with a fix.
## <a name="feature"></a> Missing a Feature?
You can *request* a new feature by [submitting an issue](#submit-issue) to our GitHub
Repository. If you would like to *implement* a new feature, please submit an issue with
@ -47,17 +51,23 @@ Adding a new topic to the documentation, or significantly re-writing a topic, co
feature.
* **Small Features** can be crafted and directly [submitted as a Pull Request](#submit-pr).
## <a name="submit"></a> Submission Guidelines
### <a name="submit-issue"></a> Submitting an Issue
Before you submit an issue, please search the issue tracker, maybe an issue for your problem already exists and the discussion might inform you of workarounds readily available.
We want to fix all the issues as soon as possible, but before fixing a bug we need to reproduce and confirm it. In order to reproduce bugs, we will systematically ask you to provide a minimal reproduction. Having a minimal reproducible scenario gives us a wealth of important information without going back & forth to you with additional questions.
We want to fix all the issues as soon as possible, but before fixing a bug we need to reproduce and confirm it.
In order to reproduce bugs, we will systematically ask you to provide a minimal reproduction.
Having a minimal reproducible scenario gives us a wealth of important information without going back & forth to you with additional questions.
A minimal reproduction allows us to quickly confirm a bug (or point out a coding problem) as well as confirm that we are fixing the right problem.
We will be insisting on a minimal reproduction scenario in order to save maintainers' time and ultimately be able to fix more bugs. Interestingly, from our experience, users often find coding problems themselves while preparing a minimal reproduction. We understand that sometimes it might be hard to extract essential bits of code from a larger codebase but we really need to isolate the problem before we can fix it.
We will be insisting on a minimal reproduction scenario in order to save maintainers' time and ultimately be able to fix more bugs.
Interestingly, from our experience, users often find coding problems themselves while preparing a minimal reproduction.
We understand that sometimes it might be hard to extract essential bits of code from a larger codebase but we really need to isolate the problem before we can fix it.
Unfortunately, we are not able to investigate / fix bugs without a minimal reproduction, so if we don't hear back from you, we are going to close an issue that doesn't have enough info to be reproduced.
@ -67,8 +77,7 @@ You can file new issues by selecting from our [new issue templates](https://gith
### <a name="submit-pr"></a> Submitting a Pull Request (PR)
Before you submit your Pull Request (PR) consider the following guidelines:
1. Search [GitHub](https://github.com/angular/angular/pulls) for an open or closed PR
that relates to your submission. You don't want to duplicate effort.
1. Search [GitHub](https://github.com/angular/angular/pulls) for an open or closed PR that relates to your submission. You don't want to duplicate effort.
1. Be sure that an issue describes the problem you're fixing, or documents the design for the feature you'd like to add.
Discussing the design upfront helps to ensure that we're ready to accept your work.
1. Please sign our [Contributor License Agreement (CLA)](#cla) before sending PRs.
@ -111,10 +120,10 @@ Before you submit your Pull Request (PR) consider the following guidelines:
That's it! Thank you for your contribution!
#### After your pull request is merged
After your pull request is merged, you can safely delete your branch and pull the changes
from the main (upstream) repository:
After your pull request is merged, you can safely delete your branch and pull the changes from the main (upstream) repository:
* Delete the remote branch on GitHub either through the GitHub web UI or your local shell as follows:
@ -140,55 +149,65 @@ from the main (upstream) repository:
git pull --ff upstream master
```
## <a name="rules"></a> Coding Rules
To ensure consistency throughout the source code, keep these rules in mind as you are working:
* All features or bug fixes **must be tested** by one or more specs (unit-tests).
* All public API methods **must be documented**. (Details TBC).
* We follow [Google's JavaScript Style Guide][js-style-guide], but wrap all code at
**100 characters**. An automated formatter is available, see
[DEVELOPER.md](docs/DEVELOPER.md#clang-format).
* We follow [Google's JavaScript Style Guide][js-style-guide], but wrap all code at **100 characters**. An automated formatter is available, see [DEVELOPER.md](docs/DEVELOPER.md#clang-format).
## <a name="commit"></a> Commit Message Guidelines
We have very precise rules over how our git commit messages can be formatted. This leads to **more
readable messages** that are easy to follow when looking through the **project history**. But also,
we use the git commit messages to **generate the Angular change log**.
## <a name="commit"></a> Commit Message Format
*This specification is inspired and supersedes the [AngularJS commit message format][commit-message-format].*
We have very precise rules over how our git commit messages can be formatted.
This leads to **more readable messages** that are easy to follow when looking through the **project history**.
But also, we use the git commit messages to **generate the Angular change log**.
Each commit message consists of a **header**, a **body**, and a **footer**.
### Commit Message Format
Each commit message consists of a **header**, a **body** and a **footer**. The header has a special
format that includes a **type**, a **scope** and a **subject**:
```
<type>(<scope>): <subject>
<header>
<BLANK LINE>
<body>
<BLANK LINE>
<footer>
```
The **header** is mandatory and the **scope** of the header is optional.
The header is mandatory and must conform to the [Commit Message Header](#commit-header) format.
Any line of the commit message cannot be longer than 100 characters! This allows the message to be easier
to read on GitHub as well as in various git tools.
The body is mandatory for all commits except for those of scope "docs".
When the body is required it must be at least 20 characters long.
The footer should contain a [closing reference to an issue](https://help.github.com/articles/closing-issues-via-commit-messages/) if any.
The footer is optional.
Samples: (even more [samples](https://github.com/angular/angular/commits/master))
Any line of the commit message cannot be longer than 100 characters.
#### <a href="commit-header"></a>Commit Message Header
```
docs(changelog): update changelog to beta.5
```
```
fix(release): need to depend on the latest rxjs and zone.js
The version in our package.json gets copied to the one we publish, and users need the latest of these.
<type>(<scope>): <short summary>
│ │ │
│ │ └─⫸ Summary in present tense. Not capitalized. No period at the end.
│ │
│ └─⫸ Commit Scope: animations|bazel|benchpress|common|compiler|compiler-cli|core|
│ elements|forms|http|language-service|localize|platform-browser|
│ platform-browser-dynamic|platform-server|platform-webworker|
│ platform-webworker-dynamic|router|service-worker|upgrade|zone.js|
│ packaging|changelog|dev-infra|docs-infra|migrations|ngcc|ve
└─⫸ Commit Type: build|ci|docs|feat|fix|perf|refactor|style|test
```
### Revert
If the commit reverts a previous commit, it should begin with `revert: `, followed by the header of the reverted commit. In the body, it should say: `This reverts commit <hash>.`, where the hash is the SHA of the commit being reverted.
The `<type>` and `<summary>` fields are mandatory, the `(<scope>)` field is optional.
##### Type
### Type
Must be one of the following:
* **build**: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
@ -201,7 +220,8 @@ Must be one of the following:
* **style**: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
* **test**: Adding missing tests or correcting existing tests
### Scope
##### 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:
@ -230,38 +250,58 @@ The following is the list of supported scopes:
There are currently a few exceptions to the "use package name" rule:
* **packaging**: used for changes that change the npm package layout in all of our packages, e.g.
public path changes, package.json changes done to all packages, d.ts file/format changes, changes
to bundles, etc.
* **packaging**: used for changes that change the npm package layout in all of our packages, e.g. public path changes, package.json changes done to all packages, d.ts file/format changes, changes to bundles, etc.
* **changelog**: used for updating the release notes in CHANGELOG.md
* **docs-infra**: used for docs-app (angular.io) related changes within the /aio directory of the
repo
* **dev-infra**: used for dev-infra related changes within the directories /scripts, /tools and /dev-infra
* **docs-infra**: used for docs-app (angular.io) related changes within the /aio directory of the repo
* **migrations**: used for changes to the `ng update` migrations.
* **ngcc**: used for changes to the [Angular Compatibility Compiler](./packages/compiler-cli/ngcc/README.md)
* **ve**: used for changes specific to ViewEngine (legacy compiler/renderer).
* none/empty string: useful for `style`, `test` and `refactor` changes that are done across all
packages (e.g. `style: add missing semicolons`) and for docs changes that are not related to a
specific package (e.g. `docs: fix typo in tutorial`).
* none/empty string: useful for `style`, `test` and `refactor` changes that are done across all packages (e.g. `style: add missing semicolons`) and for docs changes that are not related to a specific package (e.g. `docs: fix typo in tutorial`).
### Subject
The subject contains a succinct description of the change:
##### Summary
The summary contains 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
### Body
Just as in the **subject**, use the imperative, present tense: "change" not "changed" nor "changes".
The body should include the motivation for the change and contrast this with previous behavior.
### Footer
The footer should contain any information about **Breaking Changes** and is also the place to
reference GitHub issues that this commit **Closes**.
#### Commit Message Body
**Breaking Changes** should start with the word `BREAKING CHANGE:` with a space or two newlines. The rest of the commit message is then used for this.
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 is also the place to reference GitHub issues, Jira tickets, and other PRs that this commit closes or is related to.
```
BREAKING CHANGE: <breaking change summary>
<BLANK LINE>
<breaking change description + migration instructions>
<BLANK LINE>
<BLANK LINE>
Fixes #<issue 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.
### 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.
A detailed explanation can be found in this [document][commit-message-format].
## <a name="cla"></a> Signing the CLA