Grunt aborts when running exec:

[daanvdberg]

Preconditions

1. Magento CE 2.1.5
2. Luma is not installed
3. Grunt has been set up according to: http://devdocs.magento.com/guides/v2.0/frontend-dev-guide/css-topics/css_debug.html

Steps to reproduce

1. Clean up and deploy static content
2. run the grunt:exec command

Expected result

Symlinks to the source files are republished to the pub/static/frontend/<Vendor>/<theme>/<locale> directory, after which the grunt less command can be run.

Actual result

1. grunt exec command aborts with the following error message:

>> [InvalidArgumentException]
>> There are no commands defined in the "dev:source-theme" namespace.
>> Exited with code: 1.
Warning: Task "exec:Ganges" failed. Use --force to continue.
Aborted due to warnings.

2. I have then tried running "bin/magento dev:source-theme:deploy" which fails because the Processed Area is the Luma theme, which is not installed.

Processed Area: frontend, Locale: en_US, Theme: Magento/luma, File type: less.
[InvalidArgumentException]
Verify entered values of the argument and options. Unable to resolve the source file for frontend/Magento/luma/en_US/css/styles-m.less
dev:source-theme:deploy [--type="..."] [--locale="..."] [--area="..."] [--theme="..."] [file1] ... [fileN]

[shoaibrehman]

Hi there,

I cannot reproduce the issue you've stated.

I did the following:

1. Removed di and generation from var and made sure that the directory permissions are set to 777
2. Ran setup upgrade and compile commands
3. Ran grunt exec:luma as an administrator. See screenshot:

[daanvdberg]

Hi shoaibrehman,

Thank you for giving it a try.

I, however, do not have Luma installed. Instead, I am working with a theme based on MGS Molly. Even though I have it set up this way, Luma is still requested when running "bin/magento dev:source-theme:deploy" which seems like the reason that grunt exec is not working.

[patruvlad]

@daanvdberg you should check the theme.xml file from the root of your theme, and the issue should be the <parent>Magento/luma</parent>, try to change the parent to Magento/blank. if not the case, please provide your dev/tools/grunt/configs/themes.js file