sourcing $MYVIMRC causes lots of errors

[itchyny]

:so $MYVIMRC

[nhoad]

I have found setting g:lightline in my .vimrc to be the cause for this issue (for me at least), e.g. let g:lightline = {'colorscheme': 'wombat'}

If I comment out that line, I can source the my config as many times as I like, without error. A conditional unlet g:loaded_lightline does not fix the problem either.

Sorry I can't be more helpful - I don't know vimscript very well :)

[itchyny]

Do you write the lightline setting after the syntax enable setting?

syntax enable
...
let g:lightline = ...
...

What if setting lightline before both enabling syntax and setting the colorscheme?

let g:lightline = ...
colorscheme XXX
syntax enable
...

[itchyny]

Ah, sorry. Order of syntax enable and g:lightline does not matter.
Maybe you may have letting g:lightline after setting the colorscheme.

[nhoad]

I did have colorscheme before g:lightline - swapping them around has fixed it! Thank you very much :)

Out of interest, why is the ordering important here in this case?

[itchyny]

It is a little complicated.

When colorscheme XXX is executed, all the colors of highlight groups are reset, including lightline's.
So lightline detects the colorscheme command and:

• initializes g:lightline
• sets the highlight groups of lightline
• and the statusline for lightline.

The statusline of lightline assumes that g:lightline is properly initialized.
Letting g:lightline after colorscheme command causes errors in functions, which are used in the statusline.

Anyway, I'll shortly push the code fixing this issue.

[itchyny]

Note to me: after sourcing .vimrc, if the cool statusline disappears without error, change the statusline setting in the .vimrc

set statusline=...

to

if &statusline ==# ''
  set statusline=...
endif

Plus, letting g:lightline before syntax enable will fix all the problems.

• call update in catch block in link function
• do not overwrite the statusline in .vimrc
• let g:lightline before syntax enable

Idea: watch CursorHold will make the second out of use.

[itchyny]

Simple idea: s:lightline

[itchyny]

I found the above simple idea will solve all the problems...