Update runtime files. Add Rust support.
diff --git a/runtime/autoload/rustfmt.vim b/runtime/autoload/rustfmt.vim
new file mode 100644
index 0000000..a689b5e
--- /dev/null
+++ b/runtime/autoload/rustfmt.vim
@@ -0,0 +1,107 @@
+" Author: Stephen Sugden <stephen@stephensugden.com>
+"
+" Adapted from https://github.com/fatih/vim-go
+" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
+
+if !exists("g:rustfmt_autosave")
+ let g:rustfmt_autosave = 0
+endif
+
+if !exists("g:rustfmt_command")
+ let g:rustfmt_command = "rustfmt"
+endif
+
+if !exists("g:rustfmt_options")
+ let g:rustfmt_options = ""
+endif
+
+if !exists("g:rustfmt_fail_silently")
+ let g:rustfmt_fail_silently = 0
+endif
+
+let s:got_fmt_error = 0
+
+function! s:RustfmtCommandRange(filename, line1, line2)
+ let l:arg = {"file": shellescape(a:filename), "range": [a:line1, a:line2]}
+ return printf("%s %s --write-mode=overwrite --file-lines '[%s]'", g:rustfmt_command, g:rustfmt_options, json_encode(l:arg))
+endfunction
+
+function! s:RustfmtCommand(filename)
+ return g:rustfmt_command . " --write-mode=overwrite " . g:rustfmt_options . " " . shellescape(a:filename)
+endfunction
+
+function! s:RunRustfmt(command, curw, tmpname)
+ if exists("*systemlist")
+ let out = systemlist(a:command)
+ else
+ let out = split(system(a:command), '\r\?\n')
+ endif
+
+ if v:shell_error == 0 || v:shell_error == 3
+ " remove undo point caused via BufWritePre
+ try | silent undojoin | catch | endtry
+
+ " Replace current file with temp file, then reload buffer
+ call rename(a:tmpname, expand('%'))
+ silent edit!
+ let &syntax = &syntax
+
+ " only clear location list if it was previously filled to prevent
+ " clobbering other additions
+ if s:got_fmt_error
+ let s:got_fmt_error = 0
+ call setloclist(0, [])
+ lwindow
+ endif
+ elseif g:rustfmt_fail_silently == 0
+ " otherwise get the errors and put them in the location list
+ let errors = []
+
+ for line in out
+ " src/lib.rs:13:5: 13:10 error: expected `,`, or `}`, found `value`
+ let tokens = matchlist(line, '^\(.\{-}\):\(\d\+\):\(\d\+\):\s*\(\d\+:\d\+\s*\)\?\s*error: \(.*\)')
+ if !empty(tokens)
+ call add(errors, {"filename": @%,
+ \"lnum": tokens[2],
+ \"col": tokens[3],
+ \"text": tokens[5]})
+ endif
+ endfor
+
+ if empty(errors)
+ % | " Couldn't detect rustfmt error format, output errors
+ endif
+
+ if !empty(errors)
+ call setloclist(0, errors, 'r')
+ echohl Error | echomsg "rustfmt returned error" | echohl None
+ endif
+
+ let s:got_fmt_error = 1
+ lwindow
+ " We didn't use the temp file, so clean up
+ call delete(a:tmpname)
+ endif
+
+ call winrestview(a:curw)
+endfunction
+
+function! rustfmt#FormatRange(line1, line2)
+ let l:curw = winsaveview()
+ let l:tmpname = expand("%:p:h") . "/." . expand("%:p:t") . ".rustfmt"
+ call writefile(getline(1, '$'), l:tmpname)
+
+ let command = s:RustfmtCommandRange(l:tmpname, a:line1, a:line2)
+
+ call s:RunRustfmt(command, l:curw, l:tmpname)
+endfunction
+
+function! rustfmt#Format()
+ let l:curw = winsaveview()
+ let l:tmpname = expand("%:p:h") . "/." . expand("%:p:t") . ".rustfmt"
+ call writefile(getline(1, '$'), l:tmpname)
+
+ let command = s:RustfmtCommand(l:tmpname)
+
+ call s:RunRustfmt(command, l:curw, l:tmpname)
+endfunction