Update dependencies

6 files changed, 662 insertions, 435 deletions

diff --git a/autoload/cargo.vim b/autoload/cargo.vim
index e92da22b..d1547fc9 100644
--- a/autoload/cargo.vim
+++ b/autoload/cargo.vim
@@ -1,89 +1,91 @@
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1
   
+function! cargo#Load() 
+    " Utility call to get this script loaded, for debugging
+endfunction
+
 function! cargo#cmd(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo ". a:args
+    execute "! cargo" a:args
+endfunction
+
+function! s:nearest_cargo(...) abort
+    " If the second argument is not specified, the first argument determines
+    " whether we will start from the current directory or the directory of the
+    " current buffer, otherwise, we start with the provided path on the 
+    " second argument.
+
+    let l:is_getcwd = get(a:, 1, 0)
+    if l:is_getcwd 
+        let l:starting_path = get(a:, 2, getcwd())
     else
-        echom "Missing arguments"
+        let l:starting_path = get(a:, 2, expand('%:p:h'))
     endif
+
+    return findfile('Cargo.toml', l:starting_path . ';')
 endfunction
 
-function! cargo#build(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo build " . a:args
-    else
-        execute "!" . "cargo build"
+function! cargo#nearestCargo(is_getcwd) abort
+    return s:nearest_cargo(a:is_getcwd)
+endfunction
+
+function! cargo#nearestWorkspaceCargo(is_getcwd) abort
+    let l:nearest = s:nearest_cargo(a:is_getcwd)
+    while l:nearest !=# ''
+        for l:line in readfile(l:nearest, '', 0x100)
+            if l:line =~# '\V[workspace]'
+                return l:nearest
+            endif
+        endfor
+        let l:next = fnamemodify(l:nearest, ':p:h:h')
+        let l:nearest = s:nearest_cargo(0, l:next)
+    endwhile
+    return ''
+endfunction
+
+function! cargo#nearestRootCargo(is_getcwd) abort
+    " Try to find a workspace Cargo.toml, and if not found, take the nearest
+    " regular Cargo.toml
+    let l:workspace_cargo = cargo#nearestWorkspaceCargo(a:is_getcwd)
+    if l:workspace_cargo !=# ''
+        return l:workspace_cargo
     endif
-    silent! clear
-    execute "!" . "cargo build"
+    return s:nearest_cargo(a:is_getcwd)
+endfunction
+
+
+function! cargo#build(args)
+    call cargo#cmd("build " . a:args)
 endfunction
 
 function! cargo#clean(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo clean " . a:args
-    else
-        execute "!" . "cargo clean"
-    endif
-    silent! clear
-    execute "!" . "cargo clean"
+    call cargo#cmd("clean " . a:args)
 endfunction
 
 function! cargo#doc(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo doc " . a:args
-    else
-        execute "!" . "cargo doc"
-    endif
+    call cargo#cmd("doc " . a:args)
 endfunction
 
 function! cargo#new(args)
-    silent! clear
-    if !a:args
-        execute "!cargo new " . a:args
-        :cd `=a:args`
-    else
-        echom "Missing arguments"
-    endif
+    call cargo#cmd("new " . a:args)
+    cd `=a:args`
 endfunction
 
 function! cargo#init(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo init " . a:args
-    else
-        execute "!" . "cargo init"
-    endif
+    call cargo#cmd("init " . a:args)
 endfunction
 
 function! cargo#run(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo run " . a:args
-    else
-        execute "!" . "cargo run"
-    endif
+    call cargo#cmd("run " . a:args)
 endfunction
 
 function! cargo#test(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo test " . a:args
-    else
-        execute "!" . "cargo test"
-    endif
+    call cargo#cmd("test " . a:args)
 endfunction
 
 function! cargo#bench(args)
-    silent! clear
-    if !a:args
-        execute "!" . "cargo bench " . a:args
-    else
-        execute "!" . "cargo bench"
-    endif
+    call cargo#cmd("bench " . a:args)
 endfunction
 
+" vim: set et sw=4 sts=4 ts=8:
+
 endif
diff --git a/autoload/cargo/quickfix.vim b/autoload/cargo/quickfix.vim
new file mode 100644
index 00000000..13c3b465
--- /dev/null
+++ b/autoload/cargo/quickfix.vim
@@ -0,0 +1,30 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1
+  
+function! cargo#quickfix#CmdPre() abort
+    if &filetype ==# 'rust' && get(b:, 'current_compiler', '') ==# 'cargo'
+        " Preserve the current directory, and 'lcd' to the nearest Cargo file.
+        let b:rust_compiler_cargo_qf_has_lcd = haslocaldir()
+        let b:rust_compiler_cargo_qf_prev_cd = getcwd()
+        let b:rust_compiler_cargo_qf_prev_cd_saved = 1
+        let l:nearest = fnamemodify(cargo#nearestRootCargo(0), ':h')
+        execute 'lchdir! '.l:nearest
+    else
+        let b:rust_compiler_cargo_qf_prev_cd_saved = 0
+    endif
+endfunction
+
+function! cargo#quickfix#CmdPost() abort
+    if b:rust_compiler_cargo_qf_prev_cd_saved
+        " Restore the current directory.
+        if b:rust_compiler_cargo_qf_has_lcd
+            execute 'lchdir! '.b:rust_compiler_cargo_qf_prev_cd
+        else
+            execute 'chdir! '.b:rust_compiler_cargo_qf_prev_cd
+        endif
+        let b:rust_compiler_cargo_qf_prev_cd_saved = 0
+    endif
+endfunction
+
+" vim: set et sw=4 sts=4 ts=8:
+
+endif
diff --git a/autoload/rubycomplete.vim b/autoload/rubycomplete.vim
index 8cb73fd5..1184c427 100644
--- a/autoload/rubycomplete.vim
+++ b/autoload/rubycomplete.vim
@@ -261,7 +261,7 @@ class VimRubyCompletion
     nums.each do |x|
       ln = buf[x]
       begin
-        eval( "require %s" % $1 ) if /.*require\s*(.*)$/.match( ln )
+        eval( "require %s" % $1 ) if /.*require\s*(["'].*?["'])/.match( ln )
       rescue Exception
         #ignore?
       end
diff --git a/autoload/rust.vim b/autoload/rust.vim
index 6edc48f7..7e766da1 100644
--- a/autoload/rust.vim
+++ b/autoload/rust.vim
@@ -7,203 +7,219 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1
 
 " Jump {{{1
 
+function! rust#Load() 
+    " Utility call to get this script loaded, for debugging
+endfunction
+
+function! rust#GetConfigVar(name, default)
+    " Local buffer variable with same name takes predeence over global
+    if has_key(b:, a:name) 
+        return get(b:, a:name)
+    endif
+    if has_key(g:, a:name) 
+        return get(g:, a:name)
+    endif
+    return a:default
+endfunction
+
+
 function! rust#Jump(mode, function) range
-	let cnt = v:count1
-	normal! m'
-	if a:mode ==# 'v'
-		norm! gv
-	endif
-	let foldenable = &foldenable
-	set nofoldenable
-	while cnt > 0
-		execute "call <SID>Jump_" . a:function . "()"
-		let cnt = cnt - 1
-	endwhile
-	let &foldenable = foldenable
+    let cnt = v:count1
+    normal! m'
+    if a:mode ==# 'v'
+        norm! gv
+    endif
+    let foldenable = &foldenable
+    set nofoldenable
+    while cnt > 0
+        execute "call <SID>Jump_" . a:function . "()"
+        let cnt = cnt - 1
+    endwhile
+    let &foldenable = foldenable
 endfunction
 
 function! s:Jump_Back()
-	call search('{', 'b')
-	keepjumps normal! w99[{
+    call search('{', 'b')
+    keepjumps normal! w99[{
 endfunction
 
 function! s:Jump_Forward()
-	normal! j0
-	call search('{', 'b')
-	keepjumps normal! w99[{%
-	call search('{')
+    normal! j0
+    call search('{', 'b')
+    keepjumps normal! w99[{%
+    call search('{')
 endfunction
 
 " Run {{{1
 
 function! rust#Run(bang, args)
-	let args = s:ShellTokenize(a:args)
-	if a:bang
-		let idx = index(l:args, '--')
-		if idx != -1
-			let rustc_args = idx == 0 ? [] : l:args[:idx-1]
-			let args = l:args[idx+1:]
-		else
-			let rustc_args = l:args
-			let args = []
-		endif
-	else
-		let rustc_args = []
-	endif
-
-	let b:rust_last_rustc_args = l:rustc_args
-	let b:rust_last_args = l:args
-
-	call s:WithPath(function("s:Run"), rustc_args, args)
+    let args = s:ShellTokenize(a:args)
+    if a:bang
+        let idx = index(l:args, '--')
+        if idx != -1
+            let rustc_args = idx == 0 ? [] : l:args[:idx-1]
+            let args = l:args[idx+1:]
+        else
+            let rustc_args = l:args
+            let args = []
+        endif
+    else
+        let rustc_args = []
+    endif
+
+    let b:rust_last_rustc_args = l:rustc_args
+    let b:rust_last_args = l:args
+
+    call s:WithPath(function("s:Run"), rustc_args, args)
 endfunction
 
 function! s:Run(dict, rustc_args, args)
-	let exepath = a:dict.tmpdir.'/'.fnamemodify(a:dict.path, ':t:r')
-	if has('win32')
-		let exepath .= '.exe'
-	endif
-
-	let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
-	let rustc_args = [relpath, '-o', exepath] + a:rustc_args
-
-	let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
-
-	let pwd = a:dict.istemp ? a:dict.tmpdir : ''
-	let output = s:system(pwd, shellescape(rustc) . " " . join(map(rustc_args, 'shellescape(v:val)')))
-	if output != ''
-		echohl WarningMsg
-		echo output
-		echohl None
-	endif
-	if !v:shell_error
-		exe '!' . shellescape(exepath) . " " . join(map(a:args, 'shellescape(v:val)'))
-	endif
+    let exepath = a:dict.tmpdir.'/'.fnamemodify(a:dict.path, ':t:r')
+    if has('win32')
+        let exepath .= '.exe'
+    endif
+
+    let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
+    let rustc_args = [relpath, '-o', exepath] + a:rustc_args
+
+    let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
+
+    let pwd = a:dict.istemp ? a:dict.tmpdir : ''
+    let output = s:system(pwd, shellescape(rustc) . " " . join(map(rustc_args, 'shellescape(v:val)')))
+    if output != ''
+        echohl WarningMsg
+        echo output
+        echohl None
+    endif
+    if !v:shell_error
+        exe '!' . shellescape(exepath) . " " . join(map(a:args, 'shellescape(v:val)'))
+    endif
 endfunction
 
 " Expand {{{1
 
 function! rust#Expand(bang, args)
-	let args = s:ShellTokenize(a:args)
-	if a:bang && !empty(l:args)
-		let pretty = remove(l:args, 0)
-	else
-		let pretty = "expanded"
-	endif
-	call s:WithPath(function("s:Expand"), pretty, args)
+    let args = s:ShellTokenize(a:args)
+    if a:bang && !empty(l:args)
+        let pretty = remove(l:args, 0)
+    else
+        let pretty = "expanded"
+    endif
+    call s:WithPath(function("s:Expand"), pretty, args)
 endfunction
 
 function! s:Expand(dict, pretty, args)
-	try
-		let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
-
-		if a:pretty =~? '^\%(everybody_loops$\|flowgraph=\)'
-			let flag = '--xpretty'
-		else
-			let flag = '--pretty'
-		endif
-		let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
-		let args = [relpath, '-Z', 'unstable-options', l:flag, a:pretty] + a:args
-		let pwd = a:dict.istemp ? a:dict.tmpdir : ''
-		let output = s:system(pwd, shellescape(rustc) . " " . join(map(args, 'shellescape(v:val)')))
-		if v:shell_error
-			echohl WarningMsg
-			echo output
-			echohl None
-		else
-			new
-			silent put =output
-			1
-			d
-			setl filetype=rust
-			setl buftype=nofile
-			setl bufhidden=hide
-			setl noswapfile
-			" give the buffer a nice name
-			let suffix = 1
-			let basename = fnamemodify(a:dict.path, ':t:r')
-			while 1
-				let bufname = basename
-				if suffix > 1 | let bufname .= ' ('.suffix.')' | endif
-				let bufname .= '.pretty.rs'
-				if bufexists(bufname)
-					let suffix += 1
-					continue
-				endif
-				exe 'silent noautocmd keepalt file' fnameescape(bufname)
-				break
-			endwhile
-		endif
-	endtry
+    try
+        let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
+
+        if a:pretty =~? '^\%(everybody_loops$\|flowgraph=\)'
+            let flag = '--xpretty'
+        else
+            let flag = '--pretty'
+        endif
+        let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
+        let args = [relpath, '-Z', 'unstable-options', l:flag, a:pretty] + a:args
+        let pwd = a:dict.istemp ? a:dict.tmpdir : ''
+        let output = s:system(pwd, shellescape(rustc) . " " . join(map(args, 'shellescape(v:val)')))
+        if v:shell_error
+            echohl WarningMsg
+            echo output
+            echohl None
+        else
+            new
+            silent put =output
+            1
+            d
+            setl filetype=rust
+            setl buftype=nofile
+            setl bufhidden=hide
+            setl noswapfile
+            " give the buffer a nice name
+            let suffix = 1
+            let basename = fnamemodify(a:dict.path, ':t:r')
+            while 1
+                let bufname = basename
+                if suffix > 1 | let bufname .= ' ('.suffix.')' | endif
+                let bufname .= '.pretty.rs'
+                if bufexists(bufname)
+                    let suffix += 1
+                    continue
+                endif
+                exe 'silent noautocmd keepalt file' fnameescape(bufname)
+                break
+            endwhile
+        endif
+    endtry
 endfunction
 
 function! rust#CompleteExpand(lead, line, pos)
-	if a:line[: a:pos-1] =~ '^RustExpand!\s*\S*$'
-		" first argument and it has a !
-		let list = ["normal", "expanded", "typed", "expanded,identified", "flowgraph=", "everybody_loops"]
-		if !empty(a:lead)
-			call filter(list, "v:val[:len(a:lead)-1] == a:lead")
-		endif
-		return list
-	endif
-
-	return glob(escape(a:lead, "*?[") . '*', 0, 1)
+    if a:line[: a:pos-1] =~ '^RustExpand!\s*\S*$'
+        " first argument and it has a !
+        let list = ["normal", "expanded", "typed", "expanded,identified", "flowgraph=", "everybody_loops"]
+        if !empty(a:lead)
+            call filter(list, "v:val[:len(a:lead)-1] == a:lead")
+        endif
+        return list
+    endif
+
+    return glob(escape(a:lead, "*?[") . '*', 0, 1)
 endfunction
 
 " Emit {{{1
 
 function! rust#Emit(type, args)
-	let args = s:ShellTokenize(a:args)
-	call s:WithPath(function("s:Emit"), a:type, args)
+    let args = s:ShellTokenize(a:args)
+    call s:WithPath(function("s:Emit"), a:type, args)
 endfunction
 
 function! s:Emit(dict, type, args)
-	try
-		let output_path = a:dict.tmpdir.'/output'
-
-		let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
-
-		let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
-		let args = [relpath, '--emit', a:type, '-o', output_path] + a:args
-		let pwd = a:dict.istemp ? a:dict.tmpdir : ''
-		let output = s:system(pwd, shellescape(rustc) . " " . join(map(args, 'shellescape(v:val)')))
-		if output != ''
-			echohl WarningMsg
-			echo output
-			echohl None
-		endif
-		if !v:shell_error
-			new
-			exe 'silent keepalt read' fnameescape(output_path)
-			1
-			d
-			if a:type == "llvm-ir"
-				setl filetype=llvm
-				let extension = 'll'
-			elseif a:type == "asm"
-				setl filetype=asm
-				let extension = 's'
-			endif
-			setl buftype=nofile
-			setl bufhidden=hide
-			setl noswapfile
-			if exists('l:extension')
-				" give the buffer a nice name
-				let suffix = 1
-				let basename = fnamemodify(a:dict.path, ':t:r')
-				while 1
-					let bufname = basename
-					if suffix > 1 | let bufname .= ' ('.suffix.')' | endif
-					let bufname .= '.'.extension
-					if bufexists(bufname)
-						let suffix += 1
-						continue
-					endif
-					exe 'silent noautocmd keepalt file' fnameescape(bufname)
-					break
-				endwhile
-			endif
-		endif
-	endtry
+    try
+        let output_path = a:dict.tmpdir.'/output'
+
+        let rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
+
+        let relpath = get(a:dict, 'tmpdir_relpath', a:dict.path)
+        let args = [relpath, '--emit', a:type, '-o', output_path] + a:args
+        let pwd = a:dict.istemp ? a:dict.tmpdir : ''
+        let output = s:system(pwd, shellescape(rustc) . " " . join(map(args, 'shellescape(v:val)')))
+        if output != ''
+            echohl WarningMsg
+            echo output
+            echohl None
+        endif
+        if !v:shell_error
+            new
+            exe 'silent keepalt read' fnameescape(output_path)
+            1
+            d
+            if a:type == "llvm-ir"
+                setl filetype=llvm
+                let extension = 'll'
+            elseif a:type == "asm"
+                setl filetype=asm
+                let extension = 's'
+            endif
+            setl buftype=nofile
+            setl bufhidden=hide
+            setl noswapfile
+            if exists('l:extension')
+                " give the buffer a nice name
+                let suffix = 1
+                let basename = fnamemodify(a:dict.path, ':t:r')
+                while 1
+                    let bufname = basename
+                    if suffix > 1 | let bufname .= ' ('.suffix.')' | endif
+                    let bufname .= '.'.extension
+                    if bufexists(bufname)
+                        let suffix += 1
+                        continue
+                    endif
+                    exe 'silent noautocmd keepalt file' fnameescape(bufname)
+                    break
+                endwhile
+            endif
+        endif
+    endtry
 endfunction
 
 " Utility functions {{{1
@@ -221,145 +237,145 @@ endfunction
 " existing path of the current buffer. If the path is inside of {dict.tmpdir}
 " then it is guaranteed to have a '.rs' extension.
 function! s:WithPath(func, ...)
-	let buf = bufnr('')
-	let saved = {}
-	let dict = {}
-	try
-		let saved.write = &write
-		set write
-		let dict.path = expand('%')
-		let pathisempty = empty(dict.path)
-
-		" Always create a tmpdir in case the wrapped command wants it
-		let dict.tmpdir = tempname()
-		call mkdir(dict.tmpdir)
-
-		if pathisempty || !saved.write
-			let dict.istemp = 1
-			" if we're doing this because of nowrite, preserve the filename
-			if !pathisempty
-				let filename = expand('%:t:r').".rs"
-			else
-				let filename = 'unnamed.rs'
-			endif
-			let dict.tmpdir_relpath = filename
-			let dict.path = dict.tmpdir.'/'.filename
-
-			let saved.mod = &mod
-			set nomod
-
-			silent exe 'keepalt write! ' . fnameescape(dict.path)
-			if pathisempty
-				silent keepalt 0file
-			endif
-		else
-			let dict.istemp = 0
-			update
-		endif
-
-		call call(a:func, [dict] + a:000)
-	finally
-		if bufexists(buf)
-			for [opt, value] in items(saved)
-				silent call setbufvar(buf, '&'.opt, value)
-				unlet value " avoid variable type mismatches
-			endfor
-		endif
-		if has_key(dict, 'tmpdir') | silent call s:RmDir(dict.tmpdir) | endif
-	endtry
+    let buf = bufnr('')
+    let saved = {}
+    let dict = {}
+    try
+        let saved.write = &write
+        set write
+        let dict.path = expand('%')
+        let pathisempty = empty(dict.path)
+
+        " Always create a tmpdir in case the wrapped command wants it
+        let dict.tmpdir = tempname()
+        call mkdir(dict.tmpdir)
+
+        if pathisempty || !saved.write
+            let dict.istemp = 1
+            " if we're doing this because of nowrite, preserve the filename
+            if !pathisempty
+                let filename = expand('%:t:r').".rs"
+            else
+                let filename = 'unnamed.rs'
+            endif
+            let dict.tmpdir_relpath = filename
+            let dict.path = dict.tmpdir.'/'.filename
+
+            let saved.mod = &mod
+            set nomod
+
+            silent exe 'keepalt write! ' . fnameescape(dict.path)
+            if pathisempty
+                silent keepalt 0file
+            endif
+        else
+            let dict.istemp = 0
+            update
+        endif
+
+        call call(a:func, [dict] + a:000)
+    finally
+        if bufexists(buf)
+            for [opt, value] in items(saved)
+                silent call setbufvar(buf, '&'.opt, value)
+                unlet value " avoid variable type mismatches
+            endfor
+        endif
+        if has_key(dict, 'tmpdir') | silent call s:RmDir(dict.tmpdir) | endif
+    endtry
 endfunction
 
 function! rust#AppendCmdLine(text)
-	call setcmdpos(getcmdpos())
-	let cmd = getcmdline() . a:text
-	return cmd
+    call setcmdpos(getcmdpos())
+    let cmd = getcmdline() . a:text
+    return cmd
 endfunction
 
 " Tokenize the string according to sh parsing rules
 function! s:ShellTokenize(text)
-	" states:
-	" 0: start of word
-	" 1: unquoted
-	" 2: unquoted backslash
-	" 3: double-quote
-	" 4: double-quoted backslash
-	" 5: single-quote
-	let l:state = 0
-	let l:current = ''
-	let l:args = []
-	for c in split(a:text, '\zs')
-		if l:state == 0 || l:state == 1 " unquoted
-			if l:c ==# ' '
-				if l:state == 0 | continue | endif
-				call add(l:args, l:current)
-				let l:current = ''
-				let l:state = 0
-			elseif l:c ==# '\'
-				let l:state = 2
-			elseif l:c ==# '"'
-				let l:state = 3
-			elseif l:c ==# "'"
-				let l:state = 5
-			else
-				let l:current .= l:c
-				let l:state = 1
-			endif
-		elseif l:state == 2 " unquoted backslash
-			if l:c !=# "\n" " can it even be \n?
-				let l:current .= l:c
-			endif
-			let l:state = 1
-		elseif l:state == 3 " double-quote
-			if l:c ==# '\'
-				let l:state = 4
-			elseif l:c ==# '"'
-				let l:state = 1
-			else
-				let l:current .= l:c
-			endif
-		elseif l:state == 4 " double-quoted backslash
-			if stridx('$`"\', l:c) >= 0
-				let l:current .= l:c
-			elseif l:c ==# "\n" " is this even possible?
-				" skip it
-			else
-				let l:current .= '\'.l:c
-			endif
-			let l:state = 3
-		elseif l:state == 5 " single-quoted
-			if l:c == "'"
-				let l:state = 1
-			else
-				let l:current .= l:c
-			endif
-		endif
-	endfor
-	if l:state != 0
-		call add(l:args, l:current)
-	endif
-	return l:args
+    " states:
+    " 0: start of word
+    " 1: unquoted
+    " 2: unquoted backslash
+    " 3: double-quote
+    " 4: double-quoted backslash
+    " 5: single-quote
+    let l:state = 0
+    let l:current = ''
+    let l:args = []
+    for c in split(a:text, '\zs')
+        if l:state == 0 || l:state == 1 " unquoted
+            if l:c ==# ' '
+                if l:state == 0 | continue | endif
+                call add(l:args, l:current)
+                let l:current = ''
+                let l:state = 0
+            elseif l:c ==# '\'
+                let l:state = 2
+            elseif l:c ==# '"'
+                let l:state = 3
+            elseif l:c ==# "'"
+                let l:state = 5
+            else
+                let l:current .= l:c
+                let l:state = 1
+            endif
+        elseif l:state == 2 " unquoted backslash
+            if l:c !=# "\n" " can it even be \n?
+                let l:current .= l:c
+            endif
+            let l:state = 1
+        elseif l:state == 3 " double-quote
+            if l:c ==# '\'
+                let l:state = 4
+            elseif l:c ==# '"'
+                let l:state = 1
+            else
+                let l:current .= l:c
+            endif
+        elseif l:state == 4 " double-quoted backslash
+            if stridx('$`"\', l:c) >= 0
+                let l:current .= l:c
+            elseif l:c ==# "\n" " is this even possible?
+                " skip it
+            else
+                let l:current .= '\'.l:c
+            endif
+            let l:state = 3
+        elseif l:state == 5 " single-quoted
+            if l:c == "'"
+                let l:state = 1
+            else
+                let l:current .= l:c
+            endif
+        endif
+    endfor
+    if l:state != 0
+        call add(l:args, l:current)
+    endif
+    return l:args
 endfunction
 
 function! s:RmDir(path)
-	" sanity check; make sure it's not empty, /, or $HOME
-	if empty(a:path)
-		echoerr 'Attempted to delete empty path'
-		return 0
-	elseif a:path == '/' || a:path == $HOME
-		echoerr 'Attempted to delete protected path: ' . a:path
-		return 0
-	endif
-	return system("rm -rf " . shellescape(a:path))
+    " sanity check; make sure it's not empty, /, or $HOME
+    if empty(a:path)
+        echoerr 'Attempted to delete empty path'
+        return 0
+    elseif a:path == '/' || a:path == $HOME
+        echoerr 'Attempted to delete protected path: ' . a:path
+        return 0
+    endif
+    return system("rm -rf " . shellescape(a:path))
 endfunction
 
 " Executes {cmd} with the cwd set to {pwd}, without changing Vim's cwd.
 " If {pwd} is the empty string then it doesn't change the cwd.
 function! s:system(pwd, cmd)
-	let cmd = a:cmd
-	if !empty(a:pwd)
-		let cmd = 'cd ' . shellescape(a:pwd) . ' && ' . cmd
-	endif
-	return system(cmd)
+    let cmd = a:cmd
+    if !empty(a:pwd)
+        let cmd = 'cd ' . shellescape(a:pwd) . ' && ' . cmd
+    endif
+    return system(cmd)
 endfunction
 
 " Playpen Support {{{1
@@ -368,10 +384,10 @@ endfunction
 " http://github.com/mattn/gist-vim
 function! s:has_webapi()
     if !exists("*webapi#http#post")
-	try
-	    call webapi#http#post()
-	catch
-	endtry
+        try
+            call webapi#http#post()
+        catch
+        endtry
     endif
     return exists("*webapi#http#post")
 endfunction
@@ -383,26 +399,26 @@ function! rust#Play(count, line1, line2, ...) abort
     let l:rust_shortener_url = get(g:, 'rust_shortener_url', 'https://is.gd/')
 
     if !s:has_webapi()
-	echohl ErrorMsg | echomsg ':RustPlay depends on webapi.vim (https://github.com/mattn/webapi-vim)' | echohl None
-	return
+        echohl ErrorMsg | echomsg ':RustPlay depends on webapi.vim (https://github.com/mattn/webapi-vim)' | echohl None
+        return
     endif
 
     let bufname = bufname('%')
     if a:count < 1
-	let content = join(getline(a:line1, a:line2), "\n")
+        let content = join(getline(a:line1, a:line2), "\n")
     else
-	let save_regcont = @"
-	let save_regtype = getregtype('"')
-	silent! normal! gvy
-	let content = @"
-	call setreg('"', save_regcont, save_regtype)
+        let save_regcont = @"
+        let save_regtype = getregtype('"')
+        silent! normal! gvy
+        let content = @"
+        call setreg('"', save_regcont, save_regtype)
     endif
 
     let body = l:rust_playpen_url."?code=".webapi#http#encodeURI(content)
 
     if strlen(body) > 5000
-	echohl ErrorMsg | echomsg 'Buffer too large, max 5000 encoded characters ('.strlen(body).')' | echohl None
-	return
+        echohl ErrorMsg | echomsg 'Buffer too large, max 5000 encoded characters ('.strlen(body).')' | echohl None
+        return
     endif
 
     let payload = "format=simple&url=".webapi#http#encodeURI(body)
@@ -410,7 +426,7 @@ function! rust#Play(count, line1, line2, ...) abort
     let url = res.content
 
     if exists('g:rust_clip_command')
-	call system(g:rust_clip_command, url)
+        call system(g:rust_clip_command, url)
     endif
 
     redraw | echomsg 'Done: '.url
@@ -418,6 +434,6 @@ endfunction
 
 " }}}1
 
-" vim: set noet sw=8 ts=8:
+" vim: set et sw=4 sts=4 ts=8:
 
 endif
diff --git a/autoload/rust/debugging.vim b/autoload/rust/debugging.vim
new file mode 100644
index 00000000..352556d7
--- /dev/null
+++ b/autoload/rust/debugging.vim
@@ -0,0 +1,98 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1
+  
+" For debugging, inspired by https://github.com/w0rp/rust/blob/master/autoload/rust/debugging.vim
+
+let s:global_variable_list = [
+            \ 'ftplugin_rust_source_path',
+            \ 'loaded_syntastic_rust_cargo_checker',
+            \ 'loaded_syntastic_rust_filetype',
+            \ 'loaded_syntastic_rust_rustc_checker',
+            \ 'rust_bang_comment_leader',
+            \ 'rust_cargo_avoid_whole_workspace',
+            \ 'rust_clip_command',
+            \ 'rust_conceal',
+            \ 'rust_conceal_mod_path',
+            \ 'rust_conceal_pub',
+            \ 'rust_fold',
+            \ 'rust_last_args',
+            \ 'rust_last_rustc_args',
+            \ 'rust_original_delimitMate_excluded_regions',
+            \ 'rust_playpen_url',
+            \ 'rust_recent_nearest_cargo_tol',
+            \ 'rust_recent_root_cargo_toml',
+            \ 'rust_recommended_style',
+            \ 'rust_set_conceallevel',
+            \ 'rust_set_conceallevel=1',
+            \ 'rust_set_foldmethod',
+            \ 'rust_set_foldmethod=1',
+            \ 'rust_shortener_url',
+            \ 'rustc_makeprg_no_percent',
+            \ 'rustc_path',
+            \ 'rustfmt_autosave',
+            \ 'rustfmt_autosave_because_of_config',
+            \ 'rustfmt_autosave_if_config_present',
+            \ 'rustfmt_command',
+            \ 'rustfmt_emit_files',
+            \ 'rustfmt_fail_silently',
+            \ 'rustfmt_options',
+            \ 'syntastic_extra_filetypes',
+            \ 'syntastic_rust_cargo_fname',
+            \]
+
+function! s:Echo(message) abort
+    execute 'echo a:message'
+endfunction
+
+function! s:EchoGlobalVariables() abort
+    for l:key in s:global_variable_list
+        call s:Echo('let g:' . l:key . ' = ' . string(get(g:, l:key, v:null)))
+
+        if has_key(b:, l:key)
+            call s:Echo('let b:' . l:key . ' = ' . string(b:[l:key]))
+        endif
+    endfor
+endfunction
+
+function! rust#debugging#Info() abort
+    call cargo#Load()
+    call rust#Load()
+    call rustfmt#Load()
+    call s:Echo('rust.vim Global Variables:')
+    call s:Echo('')
+    call s:EchoGlobalVariables()
+
+    silent let l:output = system(g:rustfmt_command . ' --version')
+    echo l:output
+
+    let l:rustc = exists("g:rustc_path") ? g:rustc_path : "rustc"
+    silent let l:output = system(l:rustc . ' --version')
+    echo l:output
+
+    silent let l:output = system('cargo --version')
+    echo l:output
+
+    version
+endfunction
+
+function! rust#debugging#InfoToClipboard() abort
+    redir @"
+    silent call rust#debugging#Info()
+    redir END
+
+    call s:Echo('RustInfo copied to your clipboard')
+endfunction
+
+function! rust#debugging#InfoToFile(filename) abort
+    let l:expanded_filename = expand(a:filename)
+
+    redir => l:output
+    silent call rust#debugging#Info()
+    redir END
+
+    call writefile(split(l:output, "\n"), l:expanded_filename)
+    call s:Echo('RustInfo written to ' . l:expanded_filename)
+endfunction
+
+" vim: set et sw=4 sts=4 ts=8:
+
+endif
diff --git a/autoload/rustfmt.vim b/autoload/rustfmt.vim
index 307fead7..c0335173 100644
--- a/autoload/rustfmt.vim
+++ b/autoload/rustfmt.vim
@@ -6,106 +6,187 @@ if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'rust') == -1
 " For bugs, patches and license go to https://github.com/rust-lang/rust.vim
 
 if !exists("g:rustfmt_autosave")
-	let g:rustfmt_autosave = 0
+    let g:rustfmt_autosave = 0
 endif
 
 if !exists("g:rustfmt_command")
-	let g:rustfmt_command = "rustfmt"
+    let g:rustfmt_command = "rustfmt"
 endif
 
 if !exists("g:rustfmt_options")
-	let g:rustfmt_options = ""
+    let g:rustfmt_options = ""
 endif
 
 if !exists("g:rustfmt_fail_silently")
-	let g:rustfmt_fail_silently = 0
+    let g:rustfmt_fail_silently = 0
+endif
+
+function! rustfmt#DetectVersion()
+    " Save rustfmt '--help' for feature inspection
+    silent let s:rustfmt_help = system(g:rustfmt_command . " --help")
+    let s:rustfmt_unstable_features = 1 - (s:rustfmt_help !~# "--unstable-features")
+
+    " Build a comparable rustfmt version varible out of its `--version` output:
+    silent let s:rustfmt_version = system(g:rustfmt_command . " --version")
+    let s:rustfmt_version = matchlist(s:rustfmt_version, '\vrustfmt ([0-9]+[.][0-9]+[.][0-9]+)')
+
+    if len(s:rustfmt_version) < 3 
+        let s:rustfmt_version = "0"
+    else
+        let s:rustfmt_version = s:rustfmt_version[1]
+    endif
+
+    return s:rustfmt_version
+endfunction
+
+call rustfmt#DetectVersion()
+
+if !exists("g:rustfmt_emit_files")
+    let g:rustfmt_emit_files = s:rustfmt_version >= "0.8.2"
+endif
+
+if !exists("g:rustfmt_file_lines")
+    let g:rustfmt_file_lines = 1 - (s:rustfmt_help !~# "--file-lines JSON")
 endif
 
 let s:got_fmt_error = 0
 
+function! rustfmt#Load()
+    " Utility call to get this script loaded, for debugging
+endfunction
+
+function! s:RustfmtWriteMode()
+    if g:rustfmt_emit_files
+        return "--emit=files"
+    else
+        return "--write-mode=overwrite"
+    endif
+endfunction
+
 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))
+    if g:rustfmt_file_lines == 0
+        echo "--file-lines is not supported in the installed `rustfmt` executable"
+        return
+    endif
+
+    let l:arg = {"file": shellescape(a:filename), "range": [a:line1, a:line2]}
+    let l:write_mode = s:RustfmtWriteMode()
+
+    " FIXME: When --file-lines gets to be stable, enhance this version range checking
+    " accordingly.
+    let l:unstable_features = 
+                \ (s:rustfmt_unstable_features && (s:rustfmt_version < '1.'))
+                \ ? '--unstable-features' : ''
+
+    let l:cmd = printf("%s %s %s %s --file-lines '[%s]' %s", g:rustfmt_command, 
+                \ l:write_mode, g:rustfmt_options, 
+                \ l:unstable_features, json_encode(l:arg), shellescape(a:filename))
+    return l:cmd
 endfunction
 
 function! s:RustfmtCommand(filename)
-	return g:rustfmt_command . " --write-mode=overwrite " . g:rustfmt_options . " " . shellescape(a:filename)
+    let l:write_mode = s:RustfmtWriteMode()
+    return g:rustfmt_command . " ". l:write_mode . " " . 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)
+function! s:RunRustfmt(command, tmpname, fail_silently)
+    mkview!
+
+    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
+
+        " take the tmpfile's content, this is better than rename
+        " because it preserves file modes.
+        let l:content = readfile(a:tmpname)
+        1,$d _
+        call setline(1, l:content)
+
+        " 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 && a:fail_silently == 0
+        " otherwise get the errors and put them in the location list
+        let errors = []
+
+        let prev_line = ""
+        for line in out
+            " error: expected one of `;` or `as`, found `extern`
+            "  --> src/main.rs:2:1
+            let tokens = matchlist(line, '^\s-->\s\(.\{-}\):\(\d\+\):\(\d\+\)$')
+            if !empty(tokens)
+                call add(errors, {"filename": @%,
+                            \"lnum":	tokens[2],
+                            \"col":	tokens[3],
+                            \"text":	prev_line})
+            endif
+            let prev_line = line
+        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
+    endif
+
+    call delete(a:tmpname)
+
+    silent! loadview
 endfunction
 
-function! rustfmt#FormatRange(line1, line2)
-	let l:curw = winsaveview()
-	let l:tmpname = expand("%:p:h") . "/." . expand("%:p:t") . ".rustfmt"
-	call writefile(getline(1, '$'), l:tmpname)
-
-	let command = s:RustfmtCommandRange(l:tmpname, a:line1, a:line2)
+function! s:rustfmtSaveToTmp()
+    let l:tmpname = tempname()
+    call writefile(getline(1, '$'), l:tmpname)
+    return l:tmpname
+endfunction
 
-	call s:RunRustfmt(command, l:curw, l:tmpname)
+function! rustfmt#FormatRange(line1, line2)
+    let l:tmpname = s:rustfmtSaveToTmp()
+    let command = s:RustfmtCommandRange(l:tmpname, a:line1, a:line2)
+    call s:RunRustfmt(command, l:tmpname, 0)
 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)
+    let l:tmpname = s:rustfmtSaveToTmp()
+    let command = s:RustfmtCommand(l:tmpname)
+    call s:RunRustfmt(command, l:tmpname, 0)
+endfunction
 
-	call s:RunRustfmt(command, l:curw, l:tmpname)
+function! rustfmt#PreWrite()
+    if rust#GetConfigVar('rustfmt_autosave_if_config_present', 0)
+        if findfile('rustfmt.toml', '.;') !=# '' 
+            let b:rustfmt_autosave = 1
+            let b:rustfmt_autosave_because_of_config = 1
+        endif
+    endif
+
+    if !rust#GetConfigVar("rustfmt_autosave", 0)
+        return
+    endif
+
+    let l:tmpname = s:rustfmtSaveToTmp()
+    let command = s:RustfmtCommand(l:tmpname)
+    call s:RunRustfmt(command, l:tmpname, 1)
 endfunction
 
+
+" vim: set et sw=4 sts=4 ts=8:
+
 endif