fix(keymap-upgrader): Filter key codes to bindings

Changed the key code upgrader to only replace codes that appear in
"bindings" properties. Modifier flags such as MOD_LCTL are no longer
valid as key codes, but they are still used in "mods" properties and
should not be replaced there.

docs/src/keymap-upgrade/keycodes.ts

@@ -77,21 +77,24 @@ const CODES = {
   MOD_RGUI: "RGUI",
 };
 
+// Regex matching names of properties that can have keymap bindings.
+const BINDINGS_PROPS = /^(bindings|sensor-bindings)$/;
+
 /**
  * Upgrades deprecated key code identifiers.
  */
 export function upgradeKeycodes(tree: Tree) {
   const edits: TextEdit[] = [];
 
-  // No need to filter to the bindings array. The C preprocessor would have
-  // replaced identifiers anywhere, so upgrading all identifiers preserves the
-  // original behavior of the keymap (even if that behavior wasn't intended).
   const query = Devicetree.query("(identifier) @name");
   const matches = query.matches(tree.rootNode);
 
   for (const { captures } of matches) {
     const node = findCapture("name", captures);
-    if (node) {
+
+    // Some of the codes are still valid to use in other properties such as
+    // "mods", so only replace those that are inside a "bindings" array.
+    if (node && isInBindingsArray(node)) {
       edits.push(...getUpgradeEdits(node, CODES, keycodeReplaceHandler));
     }
   }
@@ -148,3 +151,19 @@ function findBehaviorNodes(paramNode: SyntaxNode) {
 
   return nodes;
 }
+
+/**
+ * Given a identifier, returns whether it is inside a "bindings" property value.
+ */
+function isInBindingsArray(identifier: SyntaxNode) {
+  let node = identifier.parent;
+  while (node) {
+    if (node.type === "property") {
+      return !!node.childForFieldName("name")?.text.match(BINDINGS_PROPS);
+    }
+
+    node = node.parent;
+  }
+
+  return false;
+}

docs/src/pages/keymap-upgrader.mdx

@@ -11,10 +11,13 @@ Some behaviors, key codes, and other features have been renamed to be more consi
 
 Paste the contents of a `.keymap` file below. Then, hover your mouse over the upgraded keymap and click the `Copy` button in the upper-right corner to copy it to your clipboard.
 
-You will likely need to realign columns in the upgraded keymap. The upgrader also does not handle
-codes inside a `#define`, so you will need to update those manually using
+:::warning
+
+The upgrader does not handle key codes inside a `#define` or a behavior creation macro such as `ZMK_MACRO()`, so you will need to update those manually using
 [this list of deprecated codes and replacements](https://github.com/zmkfirmware/zmk/blob/main/docs/src/keymap-upgrade/keycodes.ts).
 
+:::
+
 import KeymapUpgrader from "@site/src/components/KeymapUpgrader/index";
 
 <KeymapUpgrader />