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Preface: I might be asking the wrong question, so I'll just say what my problem is first.

Whenever I use ^Z to background vim, then later (can be hours later) run fg to bring it back, YouCompleteMe doesn't do any completion (however, it does sometimes say below the status line that it needs to be restarted)

A workaround has been to run :YcmRestartServer whenever I foreground vim manually, but I'd like to have that run automatically (if it isn't already running).

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  • I’ll search later, but afaik there are no auto events for this, although presumably source code could be modified to allow it? A SIG event handler for the right thing, maybe?
    – D. Ben Knoble ♦
    Apr 8, 2020 at 1:34

1 Answer 1

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So setting aside that there may be an issue with YCM, you can put the following in your .vimrc.

augroup RestartYCM
  autocmd!
  autocmd FocusGained * :YcmRestartServer
augroup END
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  • According to the docs vimhelp.org/autocmd.txt.html#FocusGained the FocusGained event only works for GUI
    – Lazerbeak12345
    Apr 9, 2020 at 21:55
  • Maybe. If true, however, I tested it with gvim and it works a treat.
    – The Pompitous of Love
    Apr 10, 2020 at 18:09
  • I'm accepting this, not because it works for every solution, but because it works for GUI, at least, and it was, in fact, a problem with YCM that appears to be patched, so I can't easily test this anymore.
    – Lazerbeak12345
    Apr 15, 2020 at 22:58
  • Great! I actually have a Q for @D._Ben_Knoble, who apparently edited the response to include the (superior) autocommand group. I considered including the autocommand group originally, but did not under the assumption it was not strictly necessary. Would you say that (unless otherwise contraindicated) you would always include groups, or similar "best practices" in responses?
    – The Pompitous of Love
    Apr 16, 2020 at 15:19

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