Enforce formatting of TOML files (#30128)

* Fmt all toml files

* bootstrap taplo

* enforce toml formatting with taplo

* Install taplo in CI using cargo-install action

1 files changed, 14 insertions, 1 deletions

diff --git a/python/servo/platform/base.py b/python/servo/platform/base.py
index 7fde2b60c97..8af3e2056eb 100644
--- a/python/servo/platform/base.py
+++ b/python/servo/platform/base.py
@@ -8,6 +8,7 @@
 # except according to those terms.
 
 import os
+import shutil
 import subprocess
 from typing import Dict, Optional
 
@@ -96,9 +97,21 @@ class Base:
         )
 
     def bootstrap(self, force: bool):
-        if not self._platform_bootstrap(force):
+        installed_something = self._platform_bootstrap(force)
+        installed_something |= self.install_taplo(force)
+        if not installed_something:
             print("Dependencies were already installed!")
 
+    def install_taplo(self, force: bool) -> bool:
+        if not force and shutil.which("taplo") is not None:
+            return False
+
+        if subprocess.call(["cargo", "install", "taplo-cli", "--locked"],
+                           stdout=subprocess.PIPE, stderr=subprocess.PIPE) != 0:
+            raise EnvironmentError("Installation of taplo failed.")
+
+        return True
+
     def passive_bootstrap(self) -> bool:
         """A bootstrap method that is called without explicitly invoking `./mach bootstrap`
            but that is executed in the process of other `./mach` commands. This should be