Consolidate code style checks into tool scripts.

The new `tools/check-format` script checks _all_ project formatting - JS (through `prettier`), and Rust (through `rustfmt`). It also checks `prettier` against the whole project, not just against what's in the `ui` subdir, which means it now catches formatting issues in various JS config files (like `.prettierrc` itself).

This commit does not include style _fixes_, which means that it does not pass its own `tools/check-format` script. This is intentional, and is intended to make the Git history a bit easier to reason about; a future commit will include format fixes.

1 files changed, 11 insertions, 0 deletions

diff --git a/tools/check-format b/tools/check-format
new file mode 100755
index 0000000..3b68537
--- /dev/null
+++ b/tools/check-format
@@ -0,0 +1,11 @@
+#!/bin/bash -e
+
+## tools/check-format
+##
+## Verifies that the project's code conforms to the project's preferred style. Exits non-zero
+## if there are style differences.
+
+cd "$(dirname "$0")/.."
+
+npx prettier --check .
+cargo fmt --all --check