#562 Join split JSON lines together for new Rust output

1 files changed, 26 insertions, 6 deletions

diff --git a/autoload/ale/handlers/rust.vim b/autoload/ale/handlers/rust.vim
index 4fa7f059..7724ed72 100644
--- a/autoload/ale/handlers/rust.vim
+++ b/autoload/ale/handlers/rust.vim
@@ -20,17 +20,37 @@ function! s:FindErrorInExpansion(span, file_name) abort
     return []
 endfunction
 
+" The JSON output for Rust can be split over many lines.
+" Those lines should be joined together again.
+function! s:JoinJSONLines(lines) abort
+    let l:corrected_lines = []
+    let l:object_continues = 0
+
+    for l:line in a:lines
+        if l:object_continues
+            let l:corrected_lines[-1] .= l:line
+
+            if l:line =~# '}$'
+                let l:object_continues = 0
+            endif
+        elseif l:line =~# '^{'
+            call add(l:corrected_lines, l:line)
+
+            if l:line !~# '}$'
+                let l:object_continues = 1
+            endif
+        endif
+    endfor
+
+    return l:corrected_lines
+endfunction
+
 " A handler function which accepts a file name, to make unit testing easier.
 function! ale#handlers#rust#HandleRustErrorsForFile(buffer, full_filename, lines) abort
     let l:filename = fnamemodify(a:full_filename, ':t')
     let l:output = []
 
-    for l:errorline in a:lines
-        " ignore everything that is not Json
-        if l:errorline !~# '^{'
-            continue
-        endif
-
+    for l:errorline in s:JoinJSONLines(a:lines)
         let l:error = json_decode(l:errorline)
 
         if has_key(l:error, 'message') && type(l:error.message) == type({})