#!/bin/sh

PINNED_RUSTC_VERSION='rustc 1.96.1 (31fca3adb 2026-06-26)'
PINNED_CARGO_VERSION='cargo 1.96.1 (356927216 2026-06-26)'

require_pinned_rust_toolchain() {
    actual_rustc=$(rustc --version 2>/dev/null || true)
    actual_cargo=$(cargo --version 2>/dev/null || true)
    if [ "$actual_rustc" != "$PINNED_RUSTC_VERSION" ]; then
        echo "Rust compiler mismatch; required: $PINNED_RUSTC_VERSION" >&2
        exit 1
    fi
    if [ "$actual_cargo" != "$PINNED_CARGO_VERSION" ]; then
        echo "Cargo mismatch; required: $PINNED_CARGO_VERSION" >&2
        exit 1
    fi
}

hash_file() {
    shasum -a 256 "$1" | awk '{print $1}'
}

hash_rust_sources() {
    source_directory=$1
    find "$source_directory" -type f -print | LC_ALL=C sort |
        while IFS= read -r source_file; do shasum -a 256 "$source_file"; done |
        shasum -a 256 | awk '{print $1}'
}