chore(process): document triage process for angular 2
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# Triage Process and Github Labels for Angular 2
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This document describes how the Angular team uses labels and milestones to triage issues on github.
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# Issues and PRs
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## Triaged vs Untriaged Issues
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Every triaged issue must have four attributes assigned to it:
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* `priority` -- P0 through P4. P0 issues are "drop everything and do this now". P4 are nice to have.
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* `component` -- Which area of Angular knowledge this relates to.
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* `effort` -- Rough assessment of how much work this issue is. E.g. `effort: hour` means
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"probably a few hours of work".
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* `type` -- Whether this issue is a bug, feature, or other kind of task.
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Untriaged issues are any issues in the queue that don't yet have these four attributes.
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You can view a report of untriaged issues here, in our
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[Angular Triage Dashboard](http://mhevery.github.io/github_issues/).
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Issues should also have a clear action to complete that can be addressed or resolved within the
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scope of Angular 2. We'll close issues that don't meet these criteria.
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### Assigning Issues to Milestones
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Any issue that is being worked on must have:
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* An `assignee`: The person doing the work.
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* A `Milestone`: When we expect to complete this work.
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We aim to only have at most three milestones open at a time:
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* Closing Milestone: A milestone with a very small number of issues, about to release.
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* Current Milestone: Work that we plan to complete within one week.
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* Next Milestone: Work that is > 1 week but current for the team.
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The [backlog](https://github.com/angular/angular/issues?q=is%3Aopen+is%3Aissue+no%3Amilestone)
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consists of all issues that have been triaged but do not have an assignee or milestone.
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## Triaged vs Untriaged PRs
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Because of the cumulative pain associated with rebasing PRs, we triage PRs daily, and
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closing or reviewing PRs is a top priority ahead of other ongoing work.
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Every triaged PR must have a `pr_action` label assigned to it and an assignee:
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* `pr_action: cleanup` -- more work is needed from the current assignee.
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* `pr_action: discuss` -- discussion is needed, to be led by the current assignee.
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* `pr_action: merge` -- OK to merge this as soon as tests are green, `pr_state: LGTM`, and `CLA:
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yes` are true. assignee (or anyone else) can merge.
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* `pr_action: review` -- work is complete and comment is needed from the assignee.
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In addition, PRs can have the following states:
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* `pr_state: LGTM` -- PR may have outstanding changes but does not require further review.
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* `pr_state: WIP` -- PR is experimental or rapidly changing. Not ready for review or triage.
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* `pr_state: blocked` -- PR is blocked on an issue or other PR. Not ready for review or triage.
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Note that an LGTM state does not mean a PR is ready to merge: for example, a reviewer might set the
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LGTM state but request a minor tweak that doesn't need further review, e.g., a rebase or small
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uncontroversial change.
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PRs do not need to be assigned to milestones, unless a milestone release should be held for that
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PR to land.
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Victor (`vsavkin`) and Tobias (`tbosch`) are owners of the PR queue. Here is a list of [current
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untriaged PRs](https://github.com/angular/angular/pulls?utf8=%E2%9C%93&q=is%3Aopen+no%3Amilestone+is%3Apr+-label%3A%22pr_action%3A+cleanup%22+-label%3A%22pr_action%3A+merge%22+-label%3A%22pr_action%3A+review%22+-label%3A%22pr_action%3A+discuss%22+-label%3A%22pr_state%3A+blocked%22+-label%3A%22pr_state%3A+WIP%22+).
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# Prioritization of Work
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What should you be working on?
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1. Any PRs that are assigned to you that don't have `pr_state: WIP` or `pr_state: blocked`
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1. Any issues that are assigned to you in the lowest-numbered Milestone
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1. Any issues that are assigned to you in any Milestone
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If there are no issues assigned to you in any Milestone, pick an issue, self-assign it, and add
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it to the most appropriate Milestone based on effort.
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Here are some suggestions for what to work on next:
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* Filter for issues in a component that you are knowledgeable about, and pick something that has a
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high priority.
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* Filter for any small effort task that has the special `cust: GT` or `cust:Ionic` tags,
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and priority > P3.
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* Add a new task that's really important, add `component`, `priority`, `effort`, `type` and
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assign it to yourself and the most appropriate milestone.
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# Labels Used in Triage
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## Priority
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How urgent is this issue? We use priority to determine what should be worked on in each new
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milestone.
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* `P0: critical` -- drop everything to work on this
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* `P1: urgent` -- resolve quickly in the current milestone. people are blocked
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* `P2: required` -- needed for development but not urgent yet. workaround exists, or e.g. new API
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* `P3: important` -- must complete before Angular 2 is ready for release
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* `P4: nice to have` -- a good idea, but maybe not until after release
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## Effort
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Rough, non-binding estimate of how much work this issue represents. Please change this assessment
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for anything you're working on to better reflect reality.
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* `effort: hour` -- straightforward issue that can be resolved in a few hours, e.g. < 1 day of work.
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* `effort: day` -- issue that will be a few days of work. Can be completed within a single
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milestone.
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* `effort: week` -- issue that will likely take more than 1 milestone to complete.
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<!-- We don't like these label names as
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they're not absolute (what is one developer-hour, really?) but decided it wasn't worth arguing
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over terms. -->
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## Component
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Which area of Angular knowledge is this issue most closely related to? Helpful when deciding what
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to work on next.
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* `comp: benchpress` -- benchmarks and performance testing → *tbosch*, *crossj*
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* `comp: build/dev-productivity` -- build process, e.g. CLI and related tasks → *iminar*, *caitp*
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* `comp: build/pipeline` -- build pipeline, e.g. ts2dart → *mprobst*, *alexeagle*
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* `comp: core` -- general core Angular issues, not related to a sub-category (see below) →
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*mhevery*
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* `comp: core/animations` -- animations framework → *matsko*
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* `comp: core/change_detection` -- change detection → *vsavkin*
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* `comp: core/di` -- dependency injection → *vicb*, *rkirov*
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* `comp: core/directives` -- directives
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* `comp: core/forms` -- forms → *vsavkin*
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* `comp: core/pipes` -- pipes
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* `comp: core/templating` -- templating
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* `comp: core/testbed` -- e2e tests and support for them
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* `comp: dart-transformer` -- Dart transforms → *kegluneq*, *jakemac*
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* `comp: data-access` -- → *jeffbcross*
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* `comp: docs` -- API docs and doc generation → *naomiblack*, *petebacondarwin*
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* `comp: material-components` -- Angular Material components built in Angular 2 → *jelbourn*
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* `comp: router` -- Component Router → *btford*, *igorminar*, *matsko*
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* `comp: wrenchjs`
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## Type
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What kind of problem is this?
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* `type RFC / discussion / question`
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* `type bug`
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* `type chore`
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* `type feature`
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* `type performance`
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* `type refactor`
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## Special Labels
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### action:design
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More active discussion is needed before the issue can be worked on. Typically used for `type:
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feature` or `type: RFC/discussion/question`
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<!-- TODO: Seems like this it's redundant to also have type:discussion, no? -->
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[See all issues that need discussion](https://github.com/angular/angular/labels/action:%20Design)
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### cla
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Managed by googlebot. Indicates whether a PR has a CLA on file for its author(s). Only issues with
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`cla:yes` should be merged into master.
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### cust
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This is an issue causing user pain for early adopter customers `cust: GT` or `cust: Ionic`.
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### WORKS_AS_INTENDED
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Only used on closed issues, to indicate to the reporter why we closed it.
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