ListCode, fix unique buffer opening an existing file on disk

data/init.lua

@@ -251,13 +251,16 @@ function MatchExec(s, meta)
     return {kind = "skip"}
 end
 
-OnOpenMatchers = {
+BuiltinOnOpenMatchers = {
     MatchWindowsPath,
     MatchGitCommit,
     MatchURL,
+
     MatchGotoBuild,
+
     MatchExec,
 }
+OnOpenMatchers = BuiltinOnOpenMatchers
 
 function OnOpen(path, meta)
     for i = #OnOpenMatchers,1,-1 do
@@ -319,4 +322,38 @@ function OnSave(buffer_id)
     if Style.ClangFormatOnSave and (name:match(".c$") or name:match(".h$") or name:match(".cpp$") or name:match(".hpp$")) then
         ApplyClangFormat(buffer_id)
     end
+end
+
+function IsCodeExclude(s, meta)
+    if s:match("/.git$") or s:match("\\.git$") or
+       s:match(".exe$") or
+       s:match(".bin$") or
+       s:match(".obj$") or
+       s:match(".o$") or
+       s:match(".lib$") or
+       s:match(".ilk$") or
+       s:match(".cache$") or
+       s:match(".exp$") or
+       s:match(".pdb$") or
+       s:match("/external/") or s:match("\\external\\")
+    then
+        return false
+    end
+    return true
+end
+
+BuiltinIsCodeMatchers = {
+    IsCodeExclude,
+}
+IsCodeMatchers = BuiltinIsCodeMatchers
+
+function IsCode(path, meta)
+    for i = #IsCodeMatchers,1,-1 do
+        rule = IsCodeMatchers[i]
+        result = rule(path, meta)
+        if result then
+            return result
+        end
+    end
+    return false
 end