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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use crate::cache::EmitCache;use crate::cache::FastInsecureHasher;use crate::cache::ParsedSourceCache;
use deno_core::error::AnyError;use deno_core::ModuleSpecifier;use deno_graph::MediaType;use std::sync::Arc;
/// A hashing function that takes the source code and emit options/// hash then generates a string hash which can be stored to/// determine if the cached emit is valid or not.pub fn get_source_hash(source_text: &str, emit_options_hash: u64) -> u64 {  FastInsecureHasher::new()    .write_str(source_text)    .write_u64(emit_options_hash)    .finish()}
pub fn emit_parsed_source(  emit_cache: &EmitCache,  parsed_source_cache: &ParsedSourceCache,  specifier: &ModuleSpecifier,  media_type: MediaType,  source: &Arc<str>,  emit_options: &deno_ast::EmitOptions,  emit_config_hash: u64,) -> Result<String, AnyError> {  let source_hash = get_source_hash(source, emit_config_hash);
  if let Some(emit_code) = emit_cache.get_emit_code(specifier, source_hash) {    Ok(emit_code)  } else {    // this will use a cached version if it exists    let parsed_source = parsed_source_cache.get_or_parse_module(      specifier,      source.clone(),      media_type,    )?;    let transpiled_source = parsed_source.transpile(emit_options)?;    debug_assert!(transpiled_source.source_map.is_none());    emit_cache.set_emit_code(specifier, source_hash, &transpiled_source.text);    Ok(transpiled_source.text)  }}