Add a cargo syntax checker

Author: jlevesy

syntax_checkers/rust/cargo.vim

@@ -0,0 +1,50 @@
+" Vim syntastic plugin
+" Language:     Rust
+" Maintainer:   Julien Levesy <jlevesy@gmail.com>
+"
+" See for details on how to add an external Syntastic checker:
+" https://github.com/scrooloose/syntastic/wiki/Syntax-Checker-Guide#external
+
+if exists("g:loaded_syntastic_rust_cargo_checker")
+    finish
+endif
+let g:loaded_syntastic_rust_cargo_checker = 1
+
+let g:syntastic_rust_cargo_fname = ""
+
+let s:save_cpo = &cpo
+set cpo&vim
+
+function! SyntaxCheckers_rust_cargo_IsAvailable() dict
+  return executable(self.getExec())
+endfunction
+
+function! SyntaxCheckers_rust_cargo_GetLocList() dict
+    let makeprg = self.makeprgBuild({ "args": "check" })
+
+    " Ignored patterns, and blank lines
+    let errorformat  =
+        \ '%-G,' .
+        \ '%-Gerror: aborting %.%#,' .
+        \ '%-Gerror: Could not compile %.%#,' .
+        \ '%-Gwarning: the option `Z` is unstable %.%#,'
+
+    " Meaningful lines (errors, notes, warnings, contextual information)
+    let errorformat .=
+        \ '%Eerror: %m,' .
+        \ '%Eerror[E%n]: %m,' .
+        \ '%Wwarning: %m,' .
+        \ '%Inote: %m,' .
+        \ '%C %#--> %f:%l:%c'
+
+    return SyntasticMake({
+        \ 'makeprg': makeprg,
+        \ 'errorformat': errorformat })
+endfunction
+
+call g:SyntasticRegistry.CreateAndRegisterChecker({
+    \ 'filetype': 'rust',
+    \ 'name': 'cargo'})
+
+let &cpo = s:save_cpo
+unlet s:save_cpo