260 lines
7.8 KiB
VimL
260 lines
7.8 KiB
VimL
" Author: Stephen Sugden <stephen@stephensugden.com>
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"
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" Adapted from https://github.com/fatih/vim-go
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" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
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if !exists("g:rustfmt_autosave")
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let g:rustfmt_autosave = 0
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endif
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if !exists("g:rustfmt_command")
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let g:rustfmt_command = "rustfmt"
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endif
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if !exists("g:rustfmt_options")
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let g:rustfmt_options = ""
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endif
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if !exists("g:rustfmt_fail_silently")
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let g:rustfmt_fail_silently = 0
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endif
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function! rustfmt#DetectVersion()
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" Save rustfmt '--help' for feature inspection
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silent let s:rustfmt_help = system(g:rustfmt_command . " --help")
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let s:rustfmt_unstable_features = s:rustfmt_help =~# "--unstable-features"
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" Build a comparable rustfmt version varible out of its `--version` output:
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silent let l:rustfmt_version_full = system(g:rustfmt_command . " --version")
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let l:rustfmt_version_list = matchlist(l:rustfmt_version_full,
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\ '\vrustfmt ([0-9]+[.][0-9]+[.][0-9]+)')
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if len(l:rustfmt_version_list) < 3
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let s:rustfmt_version = "0"
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else
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let s:rustfmt_version = l:rustfmt_version_list[1]
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endif
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return s:rustfmt_version
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endfunction
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call rustfmt#DetectVersion()
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if !exists("g:rustfmt_emit_files")
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let g:rustfmt_emit_files = s:rustfmt_version >= "0.8.2"
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endif
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if !exists("g:rustfmt_file_lines")
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let g:rustfmt_file_lines = s:rustfmt_help =~# "--file-lines JSON"
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endif
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let s:got_fmt_error = 0
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function! rustfmt#Load()
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" Utility call to get this script loaded, for debugging
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endfunction
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function! s:RustfmtWriteMode()
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if g:rustfmt_emit_files
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return "--emit=files"
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else
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return "--write-mode=overwrite"
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endif
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endfunction
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function! s:RustfmtConfigOptions()
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let l:rustfmt_toml = findfile('rustfmt.toml', expand('%:p:h') . ';')
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if l:rustfmt_toml !=# ''
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return '--config-path '.shellescape(fnamemodify(l:rustfmt_toml, ":p"))
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endif
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let l:_rustfmt_toml = findfile('.rustfmt.toml', expand('%:p:h') . ';')
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if l:_rustfmt_toml !=# ''
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return '--config-path '.shellescape(fnamemodify(l:_rustfmt_toml, ":p"))
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endif
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" Default to edition 2018 in case no rustfmt.toml was found.
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return '--edition 2018'
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endfunction
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function! s:RustfmtCommandRange(filename, line1, line2)
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if g:rustfmt_file_lines == 0
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echo "--file-lines is not supported in the installed `rustfmt` executable"
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return
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endif
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let l:arg = {"file": shellescape(a:filename), "range": [a:line1, a:line2]}
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let l:write_mode = s:RustfmtWriteMode()
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let l:rustfmt_config = s:RustfmtConfigOptions()
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" FIXME: When --file-lines gets to be stable, add version range checking
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" accordingly.
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let l:unstable_features = s:rustfmt_unstable_features ? '--unstable-features' : ''
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let l:cmd = printf("%s %s %s %s %s --file-lines '[%s]' %s", g:rustfmt_command,
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\ l:write_mode, g:rustfmt_options,
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\ l:unstable_features, l:rustfmt_config,
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\ json_encode(l:arg), shellescape(a:filename))
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return l:cmd
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endfunction
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function! s:RustfmtCommand()
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let write_mode = g:rustfmt_emit_files ? '--emit=stdout' : '--write-mode=display'
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let config = s:RustfmtConfigOptions()
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return join([g:rustfmt_command, write_mode, config, g:rustfmt_options])
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endfunction
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function! s:DeleteLines(start, end) abort
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silent! execute a:start . ',' . a:end . 'delete _'
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endfunction
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function! s:RunRustfmt(command, tmpname, from_writepre)
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let l:view = winsaveview()
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let l:stderr_tmpname = tempname()
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call writefile([], l:stderr_tmpname)
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let l:command = a:command . ' 2> ' . l:stderr_tmpname
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if a:tmpname ==# ''
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" Rustfmt in stdin/stdout mode
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" chdir to the directory of the file
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let l:has_lcd = haslocaldir()
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let l:prev_cd = getcwd()
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execute 'lchdir! '.expand('%:h')
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let l:buffer = getline(1, '$')
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if exists("*systemlist")
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silent let out = systemlist(l:command, l:buffer)
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else
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silent let out = split(system(l:command,
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\ join(l:buffer, "\n")), '\r\?\n')
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endif
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else
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if exists("*systemlist")
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silent let out = systemlist(l:command)
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else
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silent let out = split(system(l:command), '\r\?\n')
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endif
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endif
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let l:stderr = readfile(l:stderr_tmpname)
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call delete(l:stderr_tmpname)
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let l:open_lwindow = 0
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if v:shell_error == 0
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if a:from_writepre
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" remove undo point caused via BufWritePre
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try | silent undojoin | catch | endtry
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endif
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if a:tmpname ==# ''
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let l:content = l:out
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else
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" take the tmpfile's content, this is better than rename
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" because it preserves file modes.
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let l:content = readfile(a:tmpname)
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endif
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call s:DeleteLines(len(l:content), line('$'))
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call setline(1, l:content)
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" only clear location list if it was previously filled to prevent
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" clobbering other additions
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if s:got_fmt_error
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let s:got_fmt_error = 0
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call setloclist(0, [])
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let l:open_lwindow = 1
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endif
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elseif g:rustfmt_fail_silently == 0 && !a:from_writepre
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" otherwise get the errors and put them in the location list
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let l:errors = []
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let l:prev_line = ""
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for l:line in l:stderr
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" error: expected one of `;` or `as`, found `extern`
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" --> src/main.rs:2:1
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let tokens = matchlist(l:line, '^\s\+-->\s\(.\{-}\):\(\d\+\):\(\d\+\)$')
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if !empty(tokens)
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call add(l:errors, {"filename": @%,
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\"lnum": tokens[2],
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\"col": tokens[3],
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\"text": l:prev_line})
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endif
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let l:prev_line = l:line
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endfor
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if !empty(l:errors)
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call setloclist(0, l:errors, 'r')
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echohl Error | echomsg "rustfmt returned error" | echohl None
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else
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echo "rust.vim: was not able to parse rustfmt messages. Here is the raw output:"
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echo "\n"
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for l:line in l:stderr
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echo l:line
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endfor
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endif
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let s:got_fmt_error = 1
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let l:open_lwindow = 1
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endif
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" Restore the current directory if needed
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if a:tmpname ==# ''
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if l:has_lcd
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execute 'lchdir! '.l:prev_cd
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else
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execute 'chdir! '.l:prev_cd
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endif
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endif
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" Open lwindow after we have changed back to the previous directory
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if l:open_lwindow == 1
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lwindow
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endif
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call winrestview(l:view)
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endfunction
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function! rustfmt#FormatRange(line1, line2)
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let l:tmpname = tempname()
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call writefile(getline(1, '$'), l:tmpname)
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let command = s:RustfmtCommandRange(l:tmpname, a:line1, a:line2)
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call s:RunRustfmt(command, l:tmpname, v:false)
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call delete(l:tmpname)
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endfunction
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function! rustfmt#Format()
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call s:RunRustfmt(s:RustfmtCommand(), '', v:false)
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endfunction
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function! rustfmt#Cmd()
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" Mainly for debugging
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return s:RustfmtCommand()
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endfunction
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function! rustfmt#PreWrite()
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if !filereadable(expand("%@"))
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return
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endif
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if rust#GetConfigVar('rustfmt_autosave_if_config_present', 0)
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if findfile('rustfmt.toml', '.;') !=# '' || findfile('.rustfmt.toml', '.;') !=# ''
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let b:rustfmt_autosave = 1
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let b:_rustfmt_autosave_because_of_config = 1
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endif
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else
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if has_key(b:, '_rustfmt_autosave_because_of_config')
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unlet b:_rustfmt_autosave_because_of_config
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unlet b:rustfmt_autosave
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endif
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endif
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if !rust#GetConfigVar("rustfmt_autosave", 0)
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return
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endif
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call s:RunRustfmt(s:RustfmtCommand(), '', v:true)
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endfunction
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" vim: set et sw=4 sts=4 ts=8:
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