mirror of
https://github.com/denoland/deno.git
synced 2024-12-23 15:49:44 -05:00
c2a7386a42
This commit updates implementation of import maps to align it to current revision of the spec. Existing tests were removed in favor of using suite from WPT.
741 lines
21 KiB
Rust
741 lines
21 KiB
Rust
// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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use deno_core::serde::Serialize;
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use deno_core::serde_json;
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use deno_core::serde_json::Map;
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use deno_core::serde_json::Value;
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use deno_core::url::Url;
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use indexmap::IndexMap;
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use std::cmp::Ordering;
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use std::collections::HashSet;
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use std::error::Error;
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use std::fmt;
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#[derive(Debug)]
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pub struct ImportMapError(String);
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impl fmt::Display for ImportMapError {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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f.pad(&self.0)
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}
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}
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impl Error for ImportMapError {}
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// https://url.spec.whatwg.org/#special-scheme
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const SPECIAL_PROTOCOLS: &[&str] =
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&["ftp", "file", "http", "https", "ws", "wss"];
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fn is_special(url: &Url) -> bool {
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SPECIAL_PROTOCOLS.contains(&url.scheme())
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}
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type SpecifierMap = IndexMap<String, Option<Url>>;
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type ScopesMap = IndexMap<String, SpecifierMap>;
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#[derive(Debug, Clone, Serialize)]
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pub struct ImportMap {
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#[serde(skip)]
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base_url: String,
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imports: SpecifierMap,
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scopes: ScopesMap,
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}
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impl ImportMap {
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pub fn from_json(
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base_url: &str,
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json_string: &str,
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) -> Result<Self, ImportMapError> {
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let v: Value = match serde_json::from_str(json_string) {
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Ok(v) => v,
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Err(_) => {
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return Err(ImportMapError(
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"Unable to parse import map JSON".to_string(),
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));
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}
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};
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match v {
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Value::Object(_) => {}
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_ => {
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return Err(ImportMapError(
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"Import map JSON must be an object".to_string(),
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));
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}
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}
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let mut diagnostics = vec![];
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let normalized_imports = match &v.get("imports") {
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Some(imports_map) => {
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if !imports_map.is_object() {
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return Err(ImportMapError(
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"Import map's 'imports' must be an object".to_string(),
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));
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}
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let imports_map = imports_map.as_object().unwrap();
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ImportMap::parse_specifier_map(imports_map, base_url, &mut diagnostics)
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}
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None => IndexMap::new(),
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};
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let normalized_scopes = match &v.get("scopes") {
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Some(scope_map) => {
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if !scope_map.is_object() {
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return Err(ImportMapError(
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"Import map's 'scopes' must be an object".to_string(),
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));
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}
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let scope_map = scope_map.as_object().unwrap();
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ImportMap::parse_scope_map(scope_map, base_url, &mut diagnostics)?
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}
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None => IndexMap::new(),
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};
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let mut keys: HashSet<String> = v
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.as_object()
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.unwrap()
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.keys()
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.map(|k| k.to_string())
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.collect();
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keys.remove("imports");
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keys.remove("scopes");
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for key in keys {
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diagnostics.push(format!("Invalid top-level key \"{}\". Only \"imports\" and \"scopes\" can be present.", key));
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}
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let import_map = ImportMap {
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base_url: base_url.to_string(),
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imports: normalized_imports,
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scopes: normalized_scopes,
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};
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if !diagnostics.is_empty() {
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info!("Import map diagnostics:");
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for diagnotic in diagnostics {
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info!(" - {}", diagnotic);
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}
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}
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Ok(import_map)
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}
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fn try_url_like_specifier(specifier: &str, base: &str) -> Option<Url> {
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if specifier.starts_with('/')
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|| specifier.starts_with("./")
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|| specifier.starts_with("../")
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{
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if let Ok(base_url) = Url::parse(base) {
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if let Ok(url) = base_url.join(specifier) {
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return Some(url);
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}
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}
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}
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if let Ok(url) = Url::parse(specifier) {
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return Some(url);
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}
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None
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}
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/// Parse provided key as import map specifier.
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///
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/// Specifiers must be valid URLs (eg. "https://deno.land/x/std/testing/asserts.ts")
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/// or "bare" specifiers (eg. "moment").
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fn normalize_specifier_key(
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specifier_key: &str,
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base_url: &str,
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diagnostics: &mut Vec<String>,
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) -> Option<String> {
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// ignore empty keys
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if specifier_key.is_empty() {
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diagnostics.push("Invalid empty string specifier.".to_string());
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return None;
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}
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if let Some(url) =
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ImportMap::try_url_like_specifier(specifier_key, base_url)
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{
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return Some(url.to_string());
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}
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// "bare" specifier
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Some(specifier_key.to_string())
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}
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/// Convert provided JSON map to valid SpecifierMap.
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///
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/// From specification:
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/// - order of iteration must be retained
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/// - SpecifierMap's keys are sorted in longest and alphabetic order
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fn parse_specifier_map(
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json_map: &Map<String, Value>,
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base_url: &str,
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diagnostics: &mut Vec<String>,
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) -> SpecifierMap {
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let mut normalized_map: SpecifierMap = SpecifierMap::new();
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// Order is preserved because of "preserve_order" feature of "serde_json".
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for (specifier_key, value) in json_map.iter() {
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let normalized_specifier_key = match ImportMap::normalize_specifier_key(
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specifier_key,
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base_url,
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diagnostics,
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) {
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Some(s) => s,
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None => continue,
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};
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let potential_address = match value {
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Value::String(address) => address.to_string(),
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_ => {
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diagnostics.push(format!("Invalid address {:#?} for the specifier key \"{}\". Addresses must be strings.", value, specifier_key));
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normalized_map.insert(normalized_specifier_key, None);
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continue;
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}
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};
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let address_url =
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match ImportMap::try_url_like_specifier(&potential_address, base_url) {
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Some(url) => url,
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None => {
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diagnostics.push(format!(
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"Invalid address \"{}\" for the specifier key \"{}\".",
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potential_address, specifier_key
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));
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normalized_map.insert(normalized_specifier_key, None);
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continue;
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}
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};
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let address_url_string = address_url.to_string();
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if specifier_key.ends_with('/') && !address_url_string.ends_with('/') {
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diagnostics.push(format!(
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"Invalid target address {:?} for package specifier {:?}. \
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Package address targets must end with \"/\".",
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address_url_string, specifier_key
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));
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normalized_map.insert(normalized_specifier_key, None);
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continue;
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}
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normalized_map.insert(normalized_specifier_key, Some(address_url));
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}
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// Sort in longest and alphabetical order.
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normalized_map.sort_by(|k1, _v1, k2, _v2| match k1.cmp(&k2) {
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Ordering::Greater => Ordering::Less,
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Ordering::Less => Ordering::Greater,
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// JSON guarantees that there can't be duplicate keys
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Ordering::Equal => unreachable!(),
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});
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normalized_map
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}
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/// Convert provided JSON map to valid ScopeMap.
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///
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/// From specification:
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/// - order of iteration must be retained
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/// - ScopeMap's keys are sorted in longest and alphabetic order
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fn parse_scope_map(
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scope_map: &Map<String, Value>,
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base_url: &str,
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diagnostics: &mut Vec<String>,
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) -> Result<ScopesMap, ImportMapError> {
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let mut normalized_map: ScopesMap = ScopesMap::new();
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// Order is preserved because of "preserve_order" feature of "serde_json".
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for (scope_prefix, potential_specifier_map) in scope_map.iter() {
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if !potential_specifier_map.is_object() {
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return Err(ImportMapError(format!(
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"The value for the {:?} scope prefix must be an object",
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scope_prefix
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)));
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}
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let potential_specifier_map =
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potential_specifier_map.as_object().unwrap();
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let scope_prefix_url =
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match Url::parse(base_url).unwrap().join(scope_prefix) {
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Ok(url) => url.to_string(),
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_ => {
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diagnostics.push(format!(
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"Invalid scope \"{}\" (parsed against base URL \"{}\").",
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scope_prefix, base_url
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));
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continue;
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}
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};
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let norm_map = ImportMap::parse_specifier_map(
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potential_specifier_map,
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base_url,
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diagnostics,
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);
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normalized_map.insert(scope_prefix_url, norm_map);
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}
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// Sort in longest and alphabetical order.
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normalized_map.sort_by(|k1, _v1, k2, _v2| match k1.cmp(&k2) {
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Ordering::Greater => Ordering::Less,
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Ordering::Less => Ordering::Greater,
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// JSON guarantees that there can't be duplicate keys
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Ordering::Equal => unreachable!(),
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});
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Ok(normalized_map)
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}
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fn resolve_scopes_match(
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scopes: &ScopesMap,
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normalized_specifier: &str,
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as_url: Option<&Url>,
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referrer: &str,
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) -> Result<Option<Url>, ImportMapError> {
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// exact-match
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if let Some(scope_imports) = scopes.get(referrer) {
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let scope_match = ImportMap::resolve_imports_match(
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scope_imports,
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normalized_specifier,
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as_url,
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)?;
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// Return only if there was actual match (not None).
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if scope_match.is_some() {
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return Ok(scope_match);
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}
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}
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for (normalized_scope_key, scope_imports) in scopes.iter() {
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if normalized_scope_key.ends_with('/')
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&& referrer.starts_with(normalized_scope_key)
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{
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let scope_match = ImportMap::resolve_imports_match(
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scope_imports,
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normalized_specifier,
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as_url,
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)?;
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// Return only if there was actual match (not None).
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if scope_match.is_some() {
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return Ok(scope_match);
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}
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}
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}
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Ok(None)
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}
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fn resolve_imports_match(
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specifier_map: &SpecifierMap,
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normalized_specifier: &str,
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as_url: Option<&Url>,
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) -> Result<Option<Url>, ImportMapError> {
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// exact-match
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if let Some(maybe_address) = specifier_map.get(normalized_specifier) {
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if let Some(address) = maybe_address {
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return Ok(Some(address.clone()));
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} else {
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return Err(ImportMapError(format!(
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"Blocked by null entry for \"{:?}\"",
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normalized_specifier
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)));
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}
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}
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// Package-prefix match
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// "most-specific wins", i.e. when there are multiple matching keys,
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// choose the longest.
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for (specifier_key, maybe_address) in specifier_map.iter() {
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if !specifier_key.ends_with('/') {
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continue;
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}
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if !normalized_specifier.starts_with(specifier_key) {
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continue;
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}
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if let Some(url) = as_url {
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if !is_special(url) {
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continue;
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}
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}
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if maybe_address.is_none() {
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return Err(ImportMapError(format!(
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"Blocked by null entry for \"{:?}\"",
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specifier_key
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)));
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}
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let resolution_result = maybe_address.clone().unwrap();
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// Enforced by parsing.
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assert!(resolution_result.to_string().ends_with('/'));
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let after_prefix = &normalized_specifier[specifier_key.len()..];
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let url = match resolution_result.join(after_prefix) {
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Ok(url) => url,
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Err(_) => {
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return Err(ImportMapError(format!(
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"Failed to resolve the specifier \"{:?}\" as its after-prefix
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portion \"{:?}\" could not be URL-parsed relative to the URL prefix
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\"{:?}\" mapped to by the prefix \"{:?}\"",
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normalized_specifier,
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after_prefix,
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resolution_result,
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specifier_key
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)));
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}
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};
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if !url.as_str().starts_with(resolution_result.as_str()) {
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return Err(ImportMapError(format!(
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"The specifier \"{:?}\" backtracks above its prefix \"{:?}\"",
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normalized_specifier, specifier_key
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)));
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}
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return Ok(Some(url));
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}
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debug!(
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"Specifier {:?} was not mapped in import map.",
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normalized_specifier
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);
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Ok(None)
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}
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pub fn resolve(
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&self,
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specifier: &str,
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referrer: &str,
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) -> Result<Option<Url>, ImportMapError> {
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let as_url: Option<Url> =
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ImportMap::try_url_like_specifier(specifier, referrer);
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let normalized_specifier = if let Some(url) = as_url.as_ref() {
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url.to_string()
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} else {
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specifier.to_string()
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};
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let scopes_match = ImportMap::resolve_scopes_match(
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&self.scopes,
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&normalized_specifier,
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as_url.as_ref(),
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&referrer.to_string(),
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)?;
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// match found in scopes map
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if scopes_match.is_some() {
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return Ok(scopes_match);
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}
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let imports_match = ImportMap::resolve_imports_match(
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&self.imports,
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&normalized_specifier,
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as_url.as_ref(),
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)?;
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// match found in import map
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if imports_match.is_some() {
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return Ok(imports_match);
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}
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// The specifier was able to be turned into a URL, but wasn't remapped into anything.
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if as_url.is_some() {
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return Ok(as_url);
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}
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Err(ImportMapError(format!(
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"Unmapped bare specifier {:?}",
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specifier
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)))
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use deno_core::resolve_import;
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use std::path::Path;
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use std::path::PathBuf;
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use walkdir::WalkDir;
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|
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#[derive(Debug)]
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enum TestKind {
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Resolution {
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given_specifier: String,
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expected_specifier: Option<String>,
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base_url: String,
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},
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Parse {
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expected_import_map: Value,
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},
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}
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|
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#[derive(Debug)]
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struct ImportMapTestCase {
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name: String,
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import_map: String,
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import_map_base_url: String,
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kind: TestKind,
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}
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fn load_import_map_wpt_tests() -> Vec<String> {
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let mut found_test_files = vec![];
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let repo_root = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap();
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let import_map_wpt_path =
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repo_root.join("test_util/wpt/import-maps/data-driven/resources");
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eprintln!("import map wpt path {:#?}", import_map_wpt_path);
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for entry in WalkDir::new(import_map_wpt_path)
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.contents_first(true)
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.into_iter()
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.filter_entry(|e| {
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eprintln!("entry {:#?}", e);
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if let Some(ext) = e.path().extension() {
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return ext.to_string_lossy() == "json";
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}
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false
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})
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.filter_map(|e| match e {
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Ok(e) => Some(e),
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_ => None,
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})
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.map(|e| PathBuf::from(e.path()))
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{
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found_test_files.push(entry);
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}
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let mut file_contents = vec![];
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for file in found_test_files {
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let content = std::fs::read_to_string(file).unwrap();
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file_contents.push(content);
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}
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file_contents
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}
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fn parse_import_map_tests(test_str: &str) -> Vec<ImportMapTestCase> {
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let json_file: serde_json::Value = serde_json::from_str(test_str).unwrap();
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let maybe_name = json_file
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.get("name")
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.map(|s| s.as_str().unwrap().to_string());
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return parse_test_object(&json_file, maybe_name, None, None, None, None);
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fn parse_test_object(
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test_obj: &Value,
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maybe_name_prefix: Option<String>,
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maybe_import_map: Option<String>,
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maybe_base_url: Option<String>,
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maybe_import_map_base_url: Option<String>,
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maybe_expected_import_map: Option<Value>,
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) -> Vec<ImportMapTestCase> {
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let maybe_import_map_base_url =
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if let Some(base_url) = test_obj.get("importMapBaseURL") {
|
|
Some(base_url.as_str().unwrap().to_string())
|
|
} else {
|
|
maybe_import_map_base_url
|
|
};
|
|
|
|
let maybe_base_url = if let Some(base_url) = test_obj.get("baseURL") {
|
|
Some(base_url.as_str().unwrap().to_string())
|
|
} else {
|
|
maybe_base_url
|
|
};
|
|
|
|
let maybe_expected_import_map =
|
|
if let Some(im) = test_obj.get("expectedParsedImportMap") {
|
|
Some(im.to_owned())
|
|
} else {
|
|
maybe_expected_import_map
|
|
};
|
|
|
|
let maybe_import_map = if let Some(import_map) = test_obj.get("importMap")
|
|
{
|
|
Some(if import_map.is_string() {
|
|
import_map.as_str().unwrap().to_string()
|
|
} else {
|
|
serde_json::to_string(import_map).unwrap()
|
|
})
|
|
} else {
|
|
maybe_import_map
|
|
};
|
|
|
|
if let Some(nested_tests) = test_obj.get("tests") {
|
|
let nested_tests_obj = nested_tests.as_object().unwrap();
|
|
let mut collected = vec![];
|
|
for (name, test_obj) in nested_tests_obj {
|
|
let nested_name = if let Some(ref name_prefix) = maybe_name_prefix {
|
|
format!("{}: {}", name_prefix, name)
|
|
} else {
|
|
name.to_string()
|
|
};
|
|
let parsed_nested_tests = parse_test_object(
|
|
test_obj,
|
|
Some(nested_name),
|
|
maybe_import_map.clone(),
|
|
maybe_base_url.clone(),
|
|
maybe_import_map_base_url.clone(),
|
|
maybe_expected_import_map.clone(),
|
|
);
|
|
collected.extend(parsed_nested_tests)
|
|
}
|
|
return collected;
|
|
}
|
|
|
|
let mut collected_cases = vec![];
|
|
if let Some(results) = test_obj.get("expectedResults") {
|
|
let expected_results = results.as_object().unwrap();
|
|
for (given, expected) in expected_results {
|
|
let name = if let Some(ref name_prefix) = maybe_name_prefix {
|
|
format!("{}: {}", name_prefix, given)
|
|
} else {
|
|
given.to_string()
|
|
};
|
|
let given_specifier = given.to_string();
|
|
let expected_specifier = expected.as_str().map(|str| str.to_string());
|
|
|
|
let test_case = ImportMapTestCase {
|
|
name,
|
|
import_map_base_url: maybe_import_map_base_url.clone().unwrap(),
|
|
import_map: maybe_import_map.clone().unwrap(),
|
|
kind: TestKind::Resolution {
|
|
given_specifier,
|
|
expected_specifier,
|
|
base_url: maybe_base_url.clone().unwrap(),
|
|
},
|
|
};
|
|
|
|
collected_cases.push(test_case);
|
|
}
|
|
} else if let Some(expected_import_map) = maybe_expected_import_map {
|
|
let test_case = ImportMapTestCase {
|
|
name: maybe_name_prefix.unwrap(),
|
|
import_map_base_url: maybe_import_map_base_url.unwrap(),
|
|
import_map: maybe_import_map.unwrap(),
|
|
kind: TestKind::Parse {
|
|
expected_import_map,
|
|
},
|
|
};
|
|
|
|
collected_cases.push(test_case);
|
|
} else {
|
|
eprintln!("unreachable {:#?}", test_obj);
|
|
unreachable!();
|
|
}
|
|
|
|
collected_cases
|
|
}
|
|
}
|
|
|
|
fn run_import_map_test_cases(tests: Vec<ImportMapTestCase>) {
|
|
for test in tests {
|
|
match &test.kind {
|
|
TestKind::Resolution {
|
|
given_specifier,
|
|
expected_specifier,
|
|
base_url,
|
|
} => {
|
|
let import_map =
|
|
ImportMap::from_json(&test.import_map_base_url, &test.import_map)
|
|
.unwrap();
|
|
let maybe_resolved = import_map
|
|
.resolve(&given_specifier, &base_url)
|
|
.ok()
|
|
.map(|maybe_resolved| {
|
|
if let Some(specifier) = maybe_resolved {
|
|
specifier.to_string()
|
|
} else {
|
|
resolve_import(&given_specifier, &base_url)
|
|
.unwrap()
|
|
.to_string()
|
|
}
|
|
});
|
|
assert_eq!(expected_specifier, &maybe_resolved, "{}", test.name);
|
|
}
|
|
TestKind::Parse {
|
|
expected_import_map,
|
|
} => {
|
|
if matches!(expected_import_map, Value::Null) {
|
|
assert!(ImportMap::from_json(
|
|
&test.import_map_base_url,
|
|
&test.import_map
|
|
)
|
|
.is_err());
|
|
} else {
|
|
let import_map =
|
|
ImportMap::from_json(&test.import_map_base_url, &test.import_map)
|
|
.unwrap();
|
|
let import_map_value = serde_json::to_value(import_map).unwrap();
|
|
assert_eq!(expected_import_map, &import_map_value, "{}", test.name);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn wpt() {
|
|
let test_file_contents = load_import_map_wpt_tests();
|
|
eprintln!("Found test files {}", test_file_contents.len());
|
|
|
|
for test_file in test_file_contents {
|
|
let tests = parse_import_map_tests(&test_file);
|
|
run_import_map_test_cases(tests);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn from_json_1() {
|
|
let base_url = "https://deno.land";
|
|
|
|
// empty JSON
|
|
assert!(ImportMap::from_json(base_url, "{}").is_ok());
|
|
|
|
let non_object_strings = vec!["null", "true", "1", "\"foo\"", "[]"];
|
|
|
|
// invalid JSON
|
|
for non_object in non_object_strings.to_vec() {
|
|
assert!(ImportMap::from_json(base_url, non_object).is_err());
|
|
}
|
|
|
|
// invalid schema: 'imports' is non-object
|
|
for non_object in non_object_strings.to_vec() {
|
|
assert!(ImportMap::from_json(
|
|
base_url,
|
|
&format!("{{\"imports\": {}}}", non_object),
|
|
)
|
|
.is_err());
|
|
}
|
|
|
|
// invalid schema: 'scopes' is non-object
|
|
for non_object in non_object_strings.to_vec() {
|
|
assert!(ImportMap::from_json(
|
|
base_url,
|
|
&format!("{{\"scopes\": {}}}", non_object),
|
|
)
|
|
.is_err());
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn from_json_2() {
|
|
let json_map = r#"{
|
|
"imports": {
|
|
"foo": "https://example.com/1",
|
|
"bar": ["https://example.com/2"],
|
|
"fizz": null
|
|
}
|
|
}"#;
|
|
let result = ImportMap::from_json("https://deno.land", json_map);
|
|
assert!(result.is_ok());
|
|
}
|
|
}
|