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I have a theme that extends the Luma theme. I am trying to get Grunt working to do preprocessing. So far, I don't have any changes/additions in my theme at all. I setup my themes.js as follows:

module.exports = { ... training_test: { area: 'frontend', name: 'Training/test', locale: 'en_US', files: [ 'css/styles-m', 'css/styles-l' ], dsl: 'less' } }; 

I do not have any root source files, but the documentation states that if you do not have any, use those from the parent theme.

When I run grunt exec:training_test I get the following error message:

Processed Area: frontend, Locale: en_US, Theme: Training/test, File type: less. >> [InvalidArgumentException] >> Verify entered values of the argument and options. Unable to resolve the source file for 'frontend/Training/test/en_US/css/styles-m.less' >> 

I setup Grunt using a build script (on Ubuntu, hence the symlink):

sudo apt-get -y install nodejs sudo apt-get -y install npm sudo npm install -g grunt-cli sudo ln -s /usr/bin/nodejs /usr/bin/node cd /var/www/html/public; npm install 

I then ran the magento deploy task (not sure if this is required or not):

bin/magento dev:source-theme:deploy 

I noticed that the Luma theme also does not extend the source files in question (css/styles-m, css/styles-l):

luma: { area: 'frontend', name: 'Magento/luma', locale: 'en_US', files: [ 'css/styles-m', 'css/styles-l' ], dsl: 'less' }, 

Could it be an issue of multiple theme inheritance?

2 Answers 2

1

Check if your theme is already added to your database table theme. If it is not shown there, run bin/magento setup:upgrade and verify your theme is then added to the database. Afterwards, theme inheritance should work correctly and your grunt task should work successfully.

0

I don't know if it's the case, but try to setup your theme settings with real file names on themes.js. For example, if you set "css/styles-m" and "css/styles-l", create less files in your theme.

While your theme has <parent>Magento/luma</parent> in theme.xml, it has inherited all styles.

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