Make any rustc lint machine-applicable :)

make-machine-applicable.sh

#!/bin/bash

# this is gross
#
# to use, set RUSTC_WORKSPACE_WRAPPER to this file
# useful with `cargo fix` when adding a new lint to your codebase
#
# if you'd like to filter only to specific diagnostics, set the env variable
# MAKE_MACHINE_APPLICABLE_FILTER to a comma-separated list of lint names or error codes

rustc="$1"
shift
case "$*" in
    *error-format=json*)
        set -o pipefail
	{ "$rustc" "$@"; exit $?; } 2>&1 | python >&2 -c '
import json
import os
import sys

codes = os.environ.get("MAKE_MACHINE_APPLICABLE_FILTER")
if codes:
    codes = set(codes.split(","))

def check_code(diag):
    if not codes:
        return True
    code = (diag.get("code") or {}).get("code")
    return code in codes


def edit_diag(diag):
    for span in diag.get("spans", []):
        if span["suggestion_applicability"] == "Unspecified":
            span["suggestion_applicability"] = "MachineApplicable"
    for child in diag.get("children", []):
        edit_diag(child)

for line in sys.stdin.readlines():
    obj = json.loads(line)
    if obj.get("$message_type") == "diagnostic" and check_code(obj):
        edit_diag(obj)
    print(json.dumps(obj))
'
	;;
    *)
	exec "$rustc" "$@"
	;;
esac