feat: new update-ui command

commands/update-ui/update-ui.cmd.json

@@ -0,0 +1,23 @@
+{
+  "$schema": "../../node_modules/command-bot/src/schema/schema.cmd.json",
+  "command": {
+    "description": "Update UI tests, e.g. after a rust toolchain upgrade, and commit them to your PR.",
+    "configuration": {
+      "gitlab": {
+        "job": {
+          "tags": ["linux-docker-vm-c2"],
+          "variables": {}
+        }
+      }
+    },
+    "presets": {
+      "substrate": {
+        "description": "Update substrate UI tests",
+        "repos": ["substrate"],
+        "args": {
+          "rust_version":  { "label": "Rust version", "type_rule": "/^[0-9.]+$/", "example": "1.70" }
+        }
+      }
+    }
+  }
+}

commands/update-ui/update-ui.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+
+set -eu -o pipefail
+shopt -s inherit_errexit
+
+. "$(dirname "${BASH_SOURCE[0]}")/../utils.sh"
+. "$(dirname "${BASH_SOURCE[0]}")/../cmd_runner.sh"
+
+main() {
+  # setup.
+  cmd_runner_setup
+
+  rust_version="$1"
+  if [[ -z "${rust_version}" ]]; then
+    die "missing rust version argument"
+  fi
+
+  # This script uses rustup to install the required rust version.
+  # Doing that in CI feels rather ugly, but sadly there's currently no mechanism
+  # in command-bot to use a different CI image for individual jobs, so this is
+  # the best we can do.
+  .maintain/update-rust-stable.sh "${rust_version}"
+
+  # commit.
+  git add .
+  git commit -m "${COMMIT_MESSAGE}"
+
+  # Push the results to the target branch
+  git remote add \
+    github \
+    "https://token:${GITHUB_TOKEN}@github.com/${GH_CONTRIBUTOR}/${GH_CONTRIBUTOR_REPO}.git"
+  git push github "HEAD:${GH_CONTRIBUTOR_BRANCH}"
+}
+
+main "$@"