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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use deno_ast::MediaType;
use deno_ast::ModuleSpecifier;
use deno_core::error::AnyError;
use deno_runtime::deno_fs;
use deno_runtime::deno_node::analyze::CjsAnalysis as ExtNodeCjsAnalysis;
use deno_runtime::deno_node::analyze::CjsAnalysisExports;
use deno_runtime::deno_node::analyze::CjsCodeAnalyzer;
use deno_runtime::deno_node::analyze::NodeCodeTranslator;
use serde::Deserialize;
use serde::Serialize;
use crate::cache::NodeAnalysisCache;
use crate::util::fs::canonicalize_path_maybe_not_exists;
pub type CliNodeCodeTranslator = NodeCodeTranslator<CliCjsCodeAnalyzer>;
/// Resolves a specifier that is pointing into a node_modules folder.
///
/// Note: This should be called whenever getting the specifier from
/// a Module::External(module) reference because that module might
/// not be fully resolved at the time deno_graph is analyzing it
/// because the node_modules folder might not exist at that time.
pub fn resolve_specifier_into_node_modules(
specifier: &ModuleSpecifier,
) -> ModuleSpecifier {
specifier
.to_file_path()
.ok()
// this path might not exist at the time the graph is being created
// because the node_modules folder might not yet exist
.and_then(|path| canonicalize_path_maybe_not_exists(&path).ok())
.and_then(|path| ModuleSpecifier::from_file_path(path).ok())
.unwrap_or_else(|| specifier.clone())
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub enum CliCjsAnalysis {
/// The module was found to be an ES module.
Esm,
/// The module was CJS.
Cjs {
exports: Vec<String>,
reexports: Vec<String>,
},
}
pub struct CliCjsCodeAnalyzer {
cache: NodeAnalysisCache,
fs: deno_fs::FileSystemRc,
}
impl CliCjsCodeAnalyzer {
pub fn new(cache: NodeAnalysisCache, fs: deno_fs::FileSystemRc) -> Self {
Self { cache, fs }
}
fn inner_cjs_analysis(
&self,
specifier: &ModuleSpecifier,
source: &str,
) -> Result<CliCjsAnalysis, AnyError> {
let source_hash = NodeAnalysisCache::compute_source_hash(source);
if let Some(analysis) = self
.cache
.get_cjs_analysis(specifier.as_str(), &source_hash)
{
return Ok(analysis);
}
let media_type = MediaType::from_specifier(specifier);
if media_type == MediaType::Json {
return Ok(CliCjsAnalysis::Cjs {
exports: vec![],
reexports: vec![],
});
}
let parsed_source = deno_ast::parse_program(deno_ast::ParseParams {
specifier: specifier.clone(),
text_info: deno_ast::SourceTextInfo::new(source.into()),
media_type,
capture_tokens: true,
scope_analysis: false,
maybe_syntax: None,
})?;
let analysis = if parsed_source.is_script() {
let analysis = parsed_source.analyze_cjs();
CliCjsAnalysis::Cjs {
exports: analysis.exports,
reexports: analysis.reexports,
}
} else {
CliCjsAnalysis::Esm
};
self
.cache
.set_cjs_analysis(specifier.as_str(), &source_hash, &analysis);
Ok(analysis)
}
}
impl CjsCodeAnalyzer for CliCjsCodeAnalyzer {
fn analyze_cjs(
&self,
specifier: &ModuleSpecifier,
source: Option<String>,
) -> Result<ExtNodeCjsAnalysis, AnyError> {
let source = match source {
Some(source) => source,
None => self
.fs
.read_text_file_sync(&specifier.to_file_path().unwrap(), None)?,
};
let analysis = self.inner_cjs_analysis(specifier, &source)?;
match analysis {
CliCjsAnalysis::Esm => Ok(ExtNodeCjsAnalysis::Esm(source)),
CliCjsAnalysis::Cjs { exports, reexports } => {
Ok(ExtNodeCjsAnalysis::Cjs(CjsAnalysisExports {
exports,
reexports,
}))
}
}
}
}
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