Import rust files

From
rust-lang/rust.vim@732b5fc

Some modifications as per #1356 that will
be folded back upstream.

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

runtime/compiler/cargo.vim

@@ -0,0 +1,29 @@
+" Vim compiler file
+" Compiler:         Cargo Compiler
+" Maintainer:       Damien Radtke <damienradtke@gmail.com>
+" Latest Revision:  2014 Sep 24
+" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
+
+if exists('current_compiler')
+	finish
+endif
+runtime compiler/rustc.vim
+let current_compiler = "cargo"
+
+if exists(':CompilerSet') != 2
+	command -nargs=* CompilerSet setlocal <args>
+endif
+
+if exists('g:cargo_makeprg_params')
+	execute 'CompilerSet makeprg=cargo\ '.escape(g:cargo_makeprg_params, ' \|"').'\ $*'
+else
+	CompilerSet makeprg=cargo\ $*
+endif
+
+" Ignore general cargo progress messages
+CompilerSet errorformat+=
+			\%-G%\\s%#Downloading%.%#,
+			\%-G%\\s%#Compiling%.%#,
+			\%-G%\\s%#Finished%.%#,
+			\%-G%\\s%#error:\ Could\ not\ compile\ %.%#,
+			\%-G%\\s%#To\ learn\ more\\,%.%#

runtime/compiler/rustc.vim

@@ -0,0 +1,46 @@
+" Vim compiler file
+" Compiler:         Rust Compiler
+" Maintainer:       Chris Morgan <me@chrismorgan.info>
+" Latest Revision:  2013 Jul 12
+" For bugs, patches and license go to https://github.com/rust-lang/rust.vim
+
+if exists("current_compiler")
+	finish
+endif
+let current_compiler = "rustc"
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+if exists(":CompilerSet") != 2
+	command -nargs=* CompilerSet setlocal <args>
+endif
+
+if exists("g:rustc_makeprg_no_percent") && g:rustc_makeprg_no_percent != 0
+	CompilerSet makeprg=rustc
+else
+	CompilerSet makeprg=rustc\ \%
+endif
+
+" Old errorformat (before nightly 2016/08/10)
+CompilerSet errorformat=
+			\%f:%l:%c:\ %t%*[^:]:\ %m,
+			\%f:%l:%c:\ %*\\d:%*\\d\ %t%*[^:]:\ %m,
+			\%-G%f:%l\ %s,
+			\%-G%*[\ ]^,
+			\%-G%*[\ ]^%*[~],
+			\%-G%*[\ ]...
+
+" New errorformat (after nightly 2016/08/10)
+CompilerSet errorformat+=
+			\%-G,
+			\%-Gerror:\ aborting\ %.%#,
+			\%-Gerror:\ Could\ not\ compile\ %.%#,
+			\%Eerror:\ %m,
+			\%Eerror[E%n]:\ %m,
+			\%Wwarning:\ %m,
+			\%Inote:\ %m,
+			\%C\ %#-->\ %f:%l:%c
+
+let &cpo = s:cpo_save
+unlet s:cpo_save