Compiling bootstrap less shows errors/warnings

Question

I've a large project using Bootstrap3 CSS Framework. We use Netbeans IDE which supports less compile on save. Netbeans is using the syntax

Using lessc Version 2.4.0 on a Ubuntu machine installed via npm.

$ lessc less/compiled.less css/compiled.css

Full output:

"/usr/local/bin/lessc" "--source-map" "--source-map- rootpath=../themes/bodensee/less" "--source-map-url=compiled.css.map" "/usr/local/vufind2/themes/bodensee/less/compiled.less" "/usr/local/vufind2/css/compiled.css" extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .btn-xs' has no matches extend ' .btn-sm' has no matches extend ' .btn-lg' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .img-responsive' has no matches extend ' .clearfix' has no matches extend ' .clearfix' has no matches extend ' .img-responsive' has no matches extend ' .clearfix' has no matches Done.

I dont't know what kind of errors they are., but I find them annoying. When I try using another syntax

$ lessc less/compiled.less > css/compiled.css

it suddenly works without these messages. Netbeans offers no way to change the syntax. Anybody knows a solution?

github.com/timdouglas/sublime-less2css/pull/106 and stackoverflow.com/questions/28450144/… — websky
– websky, Commented Feb 12, 2015 at 11:03
I already tried this. This thread is more about the compress error in the last line. I do not get this error. Updating less-plugin-clean-css does not help. — Powerriegel
– Powerriegel, Commented Feb 12, 2015 at 11:07
In you second link, it seems that the > sign is correct and Netbeans implemented it wrong? — Powerriegel
– Powerriegel, Commented Feb 13, 2015 at 8:44

Bass Jobsen · Accepted Answer · 2015-02-13 21:15:24Z

Also see: https://github.com/less/less.js/issues/2449

Less seems to threw an error when the code contains @media declaration in the main scope. As far i understand this error (warning) does not influence the extending itself.

You could safely run less with the --silent option to suppress this warning.

This is the same answer that @michelle-glauser gave, but she also informed us of where to insert the argument into django settings.

Michelle Glauser · Accepted Answer · 2015-02-21 07:58:36Z

I had this problem with a Django app, and adding this to my settings file fixed the problem:

PIPELINE_LESS_ARGUMENTS = '-s'

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