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shields/doc/badge-urls.md
chris48s e879682e29 Add documentation for designing badge URLs (#4435)
* Add documentation for designing badge URLs
Co-authored-by: Caleb Cartwright <calebcartwright@users.noreply.github.com>
2019-12-22 17:05:00 +00:00

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# Badge URL Conventions
- The format of new badges should be of the form `/SERVICE/NOUN/PARAMETERS?QUERYSTRING` e.g:
`/github/issues/:user/:repo`. The service is github, the
badge is for issues, and the parameters are `:user/:repo`.
- Parameters should always be part of the route if they are required to display a badge e.g: `:packageName`.
- Common optional params like, `:branch` or `:tag` should also be passed as part of the route.
- Query string parameters should be used when:
- The parameter is related to formatting. e.g: `/appveyor/tests/:user/:repo?compact_message`.
- The parameter is for an uncommon optional attribute, like an alternate registry URL.
- The parameter triggers application of alternative logic, like version semantics. e.g: `/github/v/tag/:user/:repo?sort=semver`.
- Services which require a url/hostname parameter always should use a query string parameter to accept that value. e.g: `/discourse/topics?server=https://meta.discourse.org`.
It is convention to use the following standard routes and abbreviations across services:
- Coverage: `/coverage`
- Downloads or Installs:
- Total: `/dt` - Use this even for services that only provide the total download/install data
- Per month: `/dm`
- Per week: `/dw`
- Per day: `/dd`
- Rating:
- Numeric: `/rating`
- Stars: `/stars`
- License: `/l`
- Version or Release: `/v`