update package.json on plugin postinstall

This is required in order to fix autocomplete of intellij.

scm-ui/ui-plugins/bin/ui-plugins.js

@@ -0,0 +1,42 @@
+#!/usr/bin/env node
+/* eslint-disable no-console */
+const { spawnSync } = require("child_process");
+
+const commands = ["postinstall"];
+
+const args = process.argv.slice(2);
+
+const commandIndex = args.findIndex(arg => {
+  return commands.includes(arg);
+});
+
+const command = commandIndex === -1 ? args[0] : args[commandIndex];
+const nodeArgs = commandIndex > 0 ? args.slice(0, commandIndex) : [];
+
+if (commands.includes(command)) {
+  const result = spawnSync(
+    "node",
+    nodeArgs.concat(require.resolve("../src/commands/" + command)).concat(args.slice(commandIndex + 1)),
+    { stdio: "inherit" }
+  );
+  if (result.signal) {
+    if (result.signal === "SIGKILL") {
+      console.log(
+        "The build failed because the process exited too early. " +
+          "This probably means the system ran out of memory or someone called " +
+          "`kill -9` on the process."
+      );
+    } else if (result.signal === "SIGTERM") {
+      console.log(
+        "The build failed because the process exited too early. " +
+          "Someone might have called `kill` or `killall`, or the system could " +
+          "be shutting down."
+      );
+    }
+    process.exit(1);
+  }
+  process.exit(result.status);
+} else {
+  console.log(`Unknown script "${command}".`);
+  console.log("Perhaps you need to update ui-plugins?");
+}