Hugo `0.20` introduces the powerful and long sought after feature [Custom Output Formats](http://gohugo.io/extras/output-formats/); Hugo isn’t just that “static HTML with an added RSS feed” anymore. _Say hello_ to calendars, e-book formats, Google AMP, and JSON search indexes, to name a few ( [#2828](//github.com/spf13/hugo/issues/2828) ).
This release represents **over 180 contributions by over 30 contributors** to the main Hugo code base. Since last release Hugo has **gained 1100 stars, 20 new contributors and 5 additional themes.**
Hugo now has:
* 16300+ stars
* 495+ contributors
* 156+ themes
[bep](//github.com/bep) still leads the Hugo development with his witty Norwegian humor, and once again contributed a significant amount of additions. Also a big shoutout to [digitalcraftsman](//github.com/digitalcraftsman) for his relentless work on keeping the documentation and the themes site in pristine condition, and [moorereason](//github.com/moorereason) and [bogem](//github.com/bogem) for their ongoing contributions.
Other Highlights
[bogem](//github.com/bogem) has also contributed TOML as an alternative and much simpler format for language/i18n files ([3200](//github.com/spf13/hugo/issues/3200)). A feature you will appreciate when you start to work on larger translations.
Also, there have been some important updates in the Emacs Org-mode handling: [chaseadamsio](//github.com/chaseadamsio) has fixed the newline-handling ( [3126](//github.com/spf13/hugo/issues/3126) ) and [clockoon](//github.com/clockoon) has added basic footnote support.
Worth mentioning is also the ongoing work that [rdwatters](//github.com/rdwatters) and [budparr](//github.com/budparr) is doing to re-do the [gohugo.io](https://gohugo.io/) site, including a total restructuring and partial rewrite of the documentation. It is getting close to finished, and it looks fantastic!
Notes
* `RSS` description in the built-in template is changed from full `.Content` to `.Summary`. This is a somewhat breaking change, but is what most people expect from their RSS feeds. If you want full content, please provide your own RSS template.
* The deprecated `.RSSlink` is now removed. Use `.RSSLink`.
* `RSSUri` is deprecated and will be removed in a future Hugo version, replace it with an output format definition.
* The deprecated `.Site.GetParam` is now removed, use `.Site.Param`.
* Hugo does no longer append missing trailing slash to `baseURL` set as a command line parameter, making it consistent with how it behaves from site config. [3262](//github.com/spf13/hugo/issues/3262)
Enhancements
* Hugo `0.20` is built with Go 1.8.1.
* Add `.Site.Params.mainSections` that defaults to the section with the most pages. Plan is to get themes to use this instead of the hardcoded `blog` in `where` clauses. [3206](//github.com/spf13/hugo/issues/3206)
* File extension is now configurable. [320](//github.com/spf13/hugo/issues/320)
* Impove `markdownify` template function performance. [3292](//github.com/spf13/hugo/issues/3292)
* Add taxonomy terms’ pages to `.Data.Pages` [2826](//github.com/spf13/hugo/issues/2826)
* Change `RSS` description from full `.Content` to `.Summary`.
* Ignore “.” dirs in `hugo --cleanDestinationDir` [3202](//github.com/spf13/hugo/issues/3202)
* Allow `jekyll import` to accept both `2006-01-02` and `2006-1-2` date format [2738](//github.com/spf13/hugo/issues/2738)
* Raise the default `rssLimit` [3145](//github.com/spf13/hugo/issues/3145)
* Unify section list vs single template lookup order [3116](//github.com/spf13/hugo/issues/3116)
* Allow `apply` to be used with the built-in Go template funcs `print`, `printf` and `println`. [3139](//github.com/spf13/hugo/issues/3139)
Fixes
* Fix deadlock in `getJSON` [3211](//github.com/spf13/hugo/issues/3211)
* Make sure empty terms pages are created. [2977](//github.com/spf13/hugo/issues/2977)
* Fix base template lookup order for sections [2995](//github.com/spf13/hugo/issues/2995)
* `URL` fixes:
* Fix pagination URLs with `baseURL` with sub-root and `canonifyUrls=false` [1252](//github.com/spf13/hugo/issues/1252)
* Fix pagination URL for resources with “.” in name [2110](//github.com/spf13/hugo/issues/2110) [2374](//github.com/spf13/hugo/issues/2374) [1885](//github.com/spf13/hugo/issues/1885)
* Handle taxonomy names with period [3169](//github.com/spf13/hugo/issues/3169)
* Handle `uglyURLs` ambiguity in `Permalink` [3102](//github.com/spf13/hugo/issues/3102)
* Fix `Permalink` for language-roots wrong when `uglyURLs` is `true` [3179](//github.com/spf13/hugo/issues/3179)
* Fix misc case issues for `URLs` [1641](//github.com/spf13/hugo/issues/1641)
* Fix for taxonomies URLs when `uglyUrls=true` [1989](//github.com/spf13/hugo/issues/1989)
* Fix empty `RSSLink` for list pages with content page. [3131](//github.com/spf13/hugo/issues/3131)
* Correctly identify regular pages on the form “my_index_page.md” [3234](//github.com/spf13/hugo/issues/3234)
* `Exit -1` on `ERROR` in global logger [3239](//github.com/spf13/hugo/issues/3239)
* Document hugo `help command` [2349](//github.com/spf13/hugo/issues/2349)
* Fix internal `Hugo` version handling for bug fix releases. [3025](//github.com/spf13/hugo/issues/3025)
* Only return `RSSLink` for pages that actually have a RSS feed. [1302](//github.com/spf13/hugo/issues/1302)