Allow setting arbitrary options via 'vis_*' keys

2 files changed, 28 insertions, 1 deletions

diff --git a/README.md b/README.md
index 321f4b7..6e04cdc 100644
--- a/README.md
+++ b/README.md
@@ -74,3 +74,28 @@ import in `visrc.lua`:
     require('editorconfig/edconf')
     vis:command('set edconfhooks on')   -- supposing you did previously
                                         -- require('vis')
+
+### Setting arbitrary options
+
+To some it might be convenient to use editorconfig files to set arbitrary
+vis options. Therefore, the vis editorconfig plugin uses the `vis_`
+prefix in keys as an interface to anything that can be specified with
+`:set`.
+
+Instead of running `:set spelllang en_US` after opening a file, for
+instance, one can also add
+
+    vis_spelllang = en_US
+
+to the appropriate section of an editorconfig file.
+
+Note that keys in editorconfig are case-insensitive. The specification
+suggests to lowercase them. Therefore, it is only possible to use this
+mechanism for lowercase options. If you really need to use upper or
+camel case options, add an alias to your `visrc.lua`:
+
+```lua
+vis:option_register("snake_case_option", "string", function(value)
+  vis:command("set camelCaseOption " .. value)
+end, "Alias for camelCaseOption")
+```
diff --git a/edconf.lua b/edconf.lua
index ed83ed5..12df5a7 100644
--- a/edconf.lua
+++ b/edconf.lua
@@ -176,7 +176,9 @@ end
 function ec_set_values(path)
   if path then
     for name, value in ec_iter(path) do
-      if OPTIONS[name] then
+      if name:sub(1,4) == "vis_" then
+        vis_set(name:sub(5,#name), value)
+      elseif OPTIONS[name] then
         OPTIONS[name](value)
       end
     end