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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
use deno_ast::ParsedSource;
use deno_core::error::AnyError;
use deno_core::ModuleSpecifier;
use deno_graph::DefaultModuleAnalyzer;
use deno_graph::MediaType;
use deno_graph::TypeScriptReference;
use import_map::ImportMap;
pub struct ImportMapUnfurler {
import_map: ImportMap,
}
impl ImportMapUnfurler {
pub fn new(import_map: ImportMap) -> Self {
Self { import_map }
}
pub fn unfurl(
&self,
url: &ModuleSpecifier,
data: Vec<u8>,
) -> Result<Vec<u8>, AnyError> {
let media_type = MediaType::from_specifier(url);
match media_type {
MediaType::JavaScript
| MediaType::Jsx
| MediaType::Mjs
| MediaType::Cjs
| MediaType::TypeScript
| MediaType::Mts
| MediaType::Cts
| MediaType::Dts
| MediaType::Dmts
| MediaType::Dcts
| MediaType::Tsx => {
// continue
}
MediaType::SourceMap
| MediaType::Unknown
| MediaType::Json
| MediaType::Wasm
| MediaType::TsBuildInfo => {
// not unfurlable data
return Ok(data);
}
}
let text = String::from_utf8(data)?;
let parsed_source = deno_ast::parse_module(deno_ast::ParseParams {
specifier: url.to_string(),
text_info: deno_ast::SourceTextInfo::from_string(text),
media_type,
capture_tokens: false,
maybe_syntax: None,
scope_analysis: false,
})?;
let mut text_changes = Vec::new();
let module_info = DefaultModuleAnalyzer::module_info(&parsed_source);
let mut analyze_specifier =
|specifier: &str, range: &deno_graph::PositionRange| {
let resolved = self.import_map.resolve(specifier, url);
if let Ok(resolved) = resolved {
let new_text = if resolved.scheme() == "file" {
format!("./{}", url.make_relative(&resolved).unwrap())
} else {
resolved.to_string()
};
text_changes.push(deno_ast::TextChange {
range: to_range(&parsed_source, range),
new_text,
});
}
};
for dep in &module_info.dependencies {
analyze_specifier(&dep.specifier, &dep.specifier_range);
}
for ts_ref in &module_info.ts_references {
let specifier_with_range = match ts_ref {
TypeScriptReference::Path(range) => range,
TypeScriptReference::Types(range) => range,
};
analyze_specifier(
&specifier_with_range.text,
&specifier_with_range.range,
);
}
for specifier_with_range in &module_info.jsdoc_imports {
analyze_specifier(
&specifier_with_range.text,
&specifier_with_range.range,
);
}
if let Some(specifier_with_range) = &module_info.jsx_import_source {
analyze_specifier(
&specifier_with_range.text,
&specifier_with_range.range,
);
}
Ok(
deno_ast::apply_text_changes(
parsed_source.text_info().text_str(),
text_changes,
)
.into_bytes(),
)
}
#[cfg(test)]
fn unfurl_to_string(
&self,
url: &ModuleSpecifier,
data: Vec<u8>,
) -> Result<String, AnyError> {
let data = self.unfurl(url, data)?;
let content = String::from_utf8(data)?;
Ok(content)
}
}
fn to_range(
parsed_source: &ParsedSource,
range: &deno_graph::PositionRange,
) -> std::ops::Range<usize> {
let mut range = range
.as_source_range(parsed_source.text_info())
.as_byte_range(parsed_source.text_info().range().start);
let text = &parsed_source.text_info().text_str()[range.clone()];
if text.starts_with('"') || text.starts_with('\'') {
range.start += 1;
}
if text.ends_with('"') || text.ends_with('\'') {
range.end -= 1;
}
range
}
#[cfg(test)]
mod tests {
use super::*;
use deno_ast::ModuleSpecifier;
use deno_core::serde_json::json;
use import_map::ImportMapWithDiagnostics;
use pretty_assertions::assert_eq;
#[test]
fn test_unfurling() {
let deno_json_url =
ModuleSpecifier::parse("file:///dev/deno.json").unwrap();
let value = json!({
"imports": {
"express": "npm:express@5",
"lib/": "./lib/",
"fizz": "./fizz/mod.ts"
}
});
let ImportMapWithDiagnostics { import_map, .. } =
import_map::parse_from_value(&deno_json_url, value).unwrap();
let unfurler = ImportMapUnfurler::new(import_map);
// Unfurling TS file should apply changes.
{
let source_code = r#"import express from "express";"
import foo from "lib/foo.ts";
import bar from "lib/bar.ts";
import fizz from "fizz";
"#;
let specifier = ModuleSpecifier::parse("file:///dev/mod.ts").unwrap();
let unfurled_source = unfurler
.unfurl_to_string(&specifier, source_code.as_bytes().to_vec())
.unwrap();
let expected_source = r#"import express from "npm:express@5";"
import foo from "./lib/foo.ts";
import bar from "./lib/bar.ts";
import fizz from "./fizz/mod.ts";
"#;
assert_eq!(unfurled_source, expected_source);
}
// Unfurling file with "unknown" media type should leave it as is
{
let source_code = r#"import express from "express";"
import foo from "lib/foo.ts";
import bar from "lib/bar.ts";
import fizz from "fizz";
"#;
let specifier = ModuleSpecifier::parse("file:///dev/mod").unwrap();
let unfurled_source = unfurler
.unfurl_to_string(&specifier, source_code.as_bytes().to_vec())
.unwrap();
assert_eq!(unfurled_source, source_code);
}
}
}
|
