v0.30

Hugo 0.30 is the Race Car Edition. Hugo is already very very fast, but much wants more. So we added Fast Render Mode. It is hard to explain, so start the Hugo development server with hugo server and start editing. Live reloads just got so much faster! The "how and what" is discussed at length in other places, but the short version is that we now re-render only the parts of the site that you are working on.

The second performance-related feature is a follow-up to the Template Metrics added in Hugo 0.29. Now, if you add the flag --templateMetricsHints, we will calculate a score for how your partials can be cached (with the partialCached template func).

This release also more or less makes the really fast Chroma highlighter a complete alternative to Pygments. Most noteable is the new table linenos support (7c30e2cb @bep #3915), which makes copy-and-paste code blocks much easier.

This release represents 31 contributions by 10 contributors to the main Hugo code base.
@bep leads the Hugo development with a significant amount of contribution, but also a big shoutout to @moorereason, @digitalcraftsman, and @bmon for their ongoing contributions.
And as always a big thanks to @digitalcraftsman for his relentless work on keeping the documentation and the themes site in pristine condition.

Many have also been busy writing and fixing the documentation in hugoDocs,
which has received 26 contributions by 15 contributors. A special thanks to @bep, @digitalcraftsman, @moorereason, and @kaushalmodi for their work on the documentation site.

Hugo now has:

• 20195+ stars
• 454+ contributors
• 180+ themes

Notes

• Running hugo server will now run with the new "Fast Render Mode" default on. To turn it off, run hugo server --disableFastRender or set disableFastRender=true in your site config.
• There have been several fixes and enhancements in the Chroma highlighter. One is that it now creates Pygments compatible CSS classes, which means that you may want to re-generate the stylesheet. See the Syntax Highlighting Doc.

Enhancements

Performance

• Only re-render the view(s) you're working on 60bd332c @bep #3962
• Detect partialCached candidates 5800a20a @bep
• Move metrics output to the end of the site build b277cb33 @moorereason

Templates

• Output xmlns:xhtml only if there are translations available 0859d9df @jamieconnolly
• Add errorf template function 4fc67fe4 @bmon #3817
• Add os.FileExists template function 28188789 @digitalcraftsman #3839
• Add float template function 57adc539 @x3ro #3307
• Rework the partial test and benchmarks e2e8bcbe @bep

Other

• Change SummaryLength to be configurable (#3924) 8717a60c @bmon #3734
• Replace make with mage in CircleCI build fe71cb6f @bep #3969
• Add table linenos support for Chroma highlighter 7c30e2cb @bep #3915
• Replace make with mage 8d2580f0 @bep #3937
• Create magefile from Makefile 384a6ac4 @natefinch
• Clean up lint in various packages 47fdfd51 @moorereason

Fixes

• Make sure Date and PublishDate are always set to a value if one is available 6a30874f @bep #3854
• Add correct config file name to verbose server log 15ec031d @mdhender