Set all highlight groups starting with a certain name?

Question

Basically I have a long list of highlight groups that start with DevIcon (DevIconPng, DevIconJs etc.), they all come with their own ctermfg and guifg and I would like to change them to a single color.

Something like:

hi DevIcon* guifg=#123456 ctermfg=25

Is this possible, or if not, is there some workaround?

Answer 1

You can use the getcompletion() function to resolve all highlights starting with a specific prefix. For example:

:echo getcompletion('DevIcon', 'highlight')
['DevIconPng', 'DevIconJs', ...]

You can then use that in a for loop to act on them.

:for hl in getcompletion('DevIcon', 'highlight') | execute 'hi '.hl.' guifg=#123456 ctermfg=25' | endfor

See :help :for and :help :execute, also :help expr-. for the string concatenation.