Wrap rust at 80 columns.

1 files changed, 6 insertions, 2 deletions

diff --git a/tools/format.py b/tools/format.py
index fc11ced4d..cb3b15a7e 100755
--- a/tools/format.py
+++ b/tools/format.py
@@ -8,6 +8,8 @@ root_path = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
 third_party_path = os.path.join(root_path, "third_party")
 prettier = os.path.join(third_party_path, "node_modules", "prettier",
                         "bin-prettier.js")
+tools_path = os.path.join(root_path, "tools")
+rustfmt_config = os.path.join(tools_path, "rustfmt.toml")
 
 os.chdir(root_path)
 # TODO(ry) Install clang-format in third_party.
@@ -24,5 +26,7 @@ run(["node", prettier, "--write"] + glob("js/*.js") + glob("js/*.ts") +
 rustfmt_extra_args = []
 if 'RUSTFMT_FLAGS' in os.environ:
     rustfmt_extra_args += os.environ['RUSTFMT_FLAGS'].split()
-run(["rustfmt", "--write-mode", "overwrite"] + rustfmt_extra_args +
-    glob("src/*.rs"))
+run([
+    "rustfmt", "--config-path", rustfmt_config, "--error-on-unformatted",
+    "--write-mode", "overwrite"
+] + rustfmt_extra_args + glob("src/*.rs"))