I have the file /path/a.md which has many sections as follows:

# abc
this this the content of section abc
# def
this this the content of section abc
## defg
this this the content of subsection defg of def

And in an other file /path/b.md I have the the following:

I want to switch to def section by this link [section def in a.md](./a.md#def), 
yeh the file name and the section name are separated by "#" 
and this kind of link is also possible:[subsection defg in a.md](./a.md##defg)
  • 2
    On my setup gf didn't opened the file because # was in isfname, so using set isfname-=# allowed gf to jump to the file. Now to go to a particular section I don't think there is a built-in way to do so but developing a function to override gf should not be too hard. – statox Aug 25 '16 at 11:35

This function is not thoroughly tested but it should provide a good enough bootstrap for your own experiments.

In ~/.vim/after/ftplugin/markdown.vim:

function! s:MDGoToSection()
    let raw_filename = expand('<cfile>')
    let arg = substitute(raw_filename, '\([^#]*\)\(#\{1,6\}\)\([^#]*\)', '+\/\2\\\\s\3 \1', 'g')
    execute "edit" arg

nnoremap <buffer> <key> :call <SID>MDGoToSection()<CR>



The filename under the cursor is split into three groups:

\([^#]*\)......................... everything before the first #              
         \(#\{1,6\}\)............. 1 to 6 #
                     \([^#]*\).... everything after #######

and reordered into a proper argument for :edit:

+\/\2\\\\s\3 \1

which should split ./foo.md##bar into ./foo.md, ##, and bar, and finally pass +/##\\sbar ./foo.md to :edit:

:edit +/##\\sbar ./foo.md
  • Damn you was a few second faster and your solution is much more elegant, I'm a little bit jealous ;) – statox Aug 25 '16 at 11:57
  • @statox, hehe… check out the edited version for even more élégance. – romainl Aug 25 '16 at 11:59
  • Ahah well done! – statox Aug 25 '16 at 12:03

As I said in the comments on my setup gf didn't opened the file because # was in isfname, so using set isfname-=# allowed gf to jump to the file.

As I also said I think the feature to go to a section of the file is not built in so you can try this function:

function! MarkdownGF()
    " Get the filename under the cursor
    let cfile=expand('<cfile>')
    " Separate the filename from the section
    let parts=split(cfile, '#')

    " No section marked
    if (len(parts) == 1)
        execute "normal! gf"
    " There was a subsection in the file name
        execute "e " . parts[0]
        let pattern = "^" . repeat('\#',len(parts)-1) . "\\\s*" . parts[len(parts)-1] . "$"
        call search(pattern, 'w')

The function is to be called when the cursor is on the file you want to open. It will go to the file and if a subsection is specified it will search for it.

To make it easier to call you could remap the function only on markdown buffers:

autocmd! Filetype markdown nnoremap <buffer> gf :call MardownGF()<CR>

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