automatically re-index file on save

[theimpostor]

I find I have to re-index the file after every change, otherwise the jumps don't work. Would be great if the plugin had an option to do this for you.

Thanks for the awesome plugin.

[mckellyln]

I agree. I'll work on an autocmd to do this.

[mckellyln]

Does this work ?

autocmd FileWritePost,FileAppendPost * call rtags#ReindexFile()

[mckellyln]

Shouldn't the code in rdm 'see' the file was changed and reindex on its own ?

[theimpostor]

That command appears to work. I wonder if instead of setting it for all filetypes maybe it should be restricted to c and cpp.

Also, rtags should be watching files for changes - but there are bugs. See Andersbakken/rtags#1172. Hence I think it'd be nice if the plugin had an option to enable the automatic re-index on save.

[mckellyln]

ok, perhaps -

autocmd FileWritePost,FileAppendPost *.{c,h,cpp,hpp,ipp} call rtags#ReindexFile()

[theimpostor]

That looks like it would work! Do we need BufWritePost also?

I thought there was an easy way to use the vim filetype to filter other autocommands. This is what I came up with, seems to work:

autocmd Filetype c,cpp autocmd BufWritePost,FileWritePost,FileAppendPost <buffer> call rtags#ReindexFile()

[mckellyln]

I can add to the plugin to do this, and I have several other changes I've made to my clone which I find helpful. I haven't seen any updates or PRs accepted to it in a while though.

[theimpostor]

Cool, if you add it I can switch to your clone locally.

[mckellyln]

@theimpostor my repo has this switch now -

let g:rtagsAutoReindexOnWrite=1

To enable.
My repo is at: https://github.com/mckellyln/vim-rtags but I have not yet updated the docs for my changes.

[lyuts]

AFAIK, rdm uses inotify to monitor changes to project files. That's why I'd expect it to reindex files once those are modified. @theimpostor , how big is your project? Is it bigger than the value in

cat /proc/sys/fs/inotify/max_user_watches

?

[mckellyln]

I have mine set to 1048576 (I think I increased it manually)
@lyuts thx for vim-rtags.

[theimpostor]

@lyuts I am on osx high sierra, and it's not clear to me what the file watch limit is. I do have a bunch of projects indexed, I will try reducing this number and see if the autoindexing works again. Thanks for the suggestion.