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config_file.rs
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config_file.rs
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
use crate::fs_util::canonicalize_path;
use crate::fs_util::specifier_parent;
use crate::fs_util::specifier_to_file_path;
use deno_core::anyhow::anyhow;
use deno_core::anyhow::bail;
use deno_core::anyhow::Context;
use deno_core::error::custom_error;
use deno_core::error::AnyError;
use deno_core::serde::Deserialize;
use deno_core::serde::Serialize;
use deno_core::serde::Serializer;
use deno_core::serde_json;
use deno_core::serde_json::json;
use deno_core::serde_json::Value;
use deno_core::ModuleSpecifier;
use std::collections::BTreeMap;
use std::collections::HashMap;
use std::fmt;
use std::path::Path;
pub(crate) type MaybeImportsResult =
Result<Option<Vec<(ModuleSpecifier, Vec<String>)>>, AnyError>;
/// The transpile options that are significant out of a user provided tsconfig
/// file, that we want to deserialize out of the final config for a transpile.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct EmitConfigOptions {
pub check_js: bool,
pub emit_decorator_metadata: bool,
pub imports_not_used_as_values: String,
pub inline_source_map: bool,
pub inline_sources: bool,
pub source_map: bool,
pub jsx: String,
pub jsx_factory: String,
pub jsx_fragment_factory: String,
pub jsx_import_source: Option<String>,
}
/// There are certain compiler options that can impact what modules are part of
/// a module graph, which need to be deserialized into a structure for analysis.
#[derive(Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct CompilerOptions {
pub jsx: Option<String>,
pub jsx_import_source: Option<String>,
pub types: Option<Vec<String>>,
}
/// A structure that represents a set of options that were ignored and the
/// path those options came from.
#[derive(Debug, Clone, PartialEq)]
pub struct IgnoredCompilerOptions {
pub items: Vec<String>,
pub maybe_specifier: Option<ModuleSpecifier>,
}
impl fmt::Display for IgnoredCompilerOptions {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut codes = self.items.clone();
codes.sort();
if let Some(specifier) = &self.maybe_specifier {
write!(f, "Unsupported compiler options in \"{}\".\n The following options were ignored:\n {}", specifier, codes.join(", "))
} else {
write!(f, "Unsupported compiler options provided.\n The following options were ignored:\n {}", codes.join(", "))
}
}
}
impl Serialize for IgnoredCompilerOptions {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
Serialize::serialize(&self.items, serializer)
}
}
/// A static slice of all the compiler options that should be ignored that
/// either have no effect on the compilation or would cause the emit to not work
/// in Deno.
pub const IGNORED_COMPILER_OPTIONS: &[&str] = &[
"allowSyntheticDefaultImports",
"allowUmdGlobalAccess",
"baseUrl",
"declaration",
"declarationMap",
"downlevelIteration",
"esModuleInterop",
"emitDeclarationOnly",
"importHelpers",
"inlineSourceMap",
"inlineSources",
"module",
"noEmitHelpers",
"noErrorTruncation",
"noLib",
"noResolve",
"outDir",
"paths",
"preserveConstEnums",
"reactNamespace",
"resolveJsonModule",
"rootDir",
"rootDirs",
"skipLibCheck",
"sourceMap",
"sourceRoot",
"target",
"useDefineForClassFields",
];
pub const IGNORED_RUNTIME_COMPILER_OPTIONS: &[&str] = &[
"assumeChangesOnlyAffectDirectDependencies",
"build",
"charset",
"composite",
"diagnostics",
"disableSizeLimit",
"emitBOM",
"extendedDiagnostics",
"forceConsistentCasingInFileNames",
"generateCpuProfile",
"help",
"incremental",
"init",
"isolatedModules",
"listEmittedFiles",
"listFiles",
"mapRoot",
"maxNodeModuleJsDepth",
"moduleResolution",
"newLine",
"noEmit",
"noEmitOnError",
"out",
"outDir",
"outFile",
"preserveSymlinks",
"preserveWatchOutput",
"pretty",
"project",
"resolveJsonModule",
"showConfig",
"skipDefaultLibCheck",
"stripInternal",
"traceResolution",
"tsBuildInfoFile",
"typeRoots",
"useDefineForClassFields",
"version",
"watch",
];
/// A function that works like JavaScript's `Object.assign()`.
pub fn json_merge(a: &mut Value, b: &Value) {
match (a, b) {
(&mut Value::Object(ref mut a), &Value::Object(ref b)) => {
for (k, v) in b {
json_merge(a.entry(k.clone()).or_insert(Value::Null), v);
}
}
(a, b) => {
*a = b.clone();
}
}
}
fn parse_compiler_options(
compiler_options: &HashMap<String, Value>,
maybe_specifier: Option<ModuleSpecifier>,
is_runtime: bool,
) -> Result<(Value, Option<IgnoredCompilerOptions>), AnyError> {
let mut filtered: HashMap<String, Value> = HashMap::new();
let mut items: Vec<String> = Vec::new();
for (key, value) in compiler_options.iter() {
let key = key.as_str();
if (!is_runtime && IGNORED_COMPILER_OPTIONS.contains(&key))
|| IGNORED_RUNTIME_COMPILER_OPTIONS.contains(&key)
{
items.push(key.to_string());
} else {
filtered.insert(key.to_string(), value.to_owned());
}
}
let value = serde_json::to_value(filtered)?;
let maybe_ignored_options = if !items.is_empty() {
Some(IgnoredCompilerOptions {
items,
maybe_specifier,
})
} else {
None
};
Ok((value, maybe_ignored_options))
}
/// A structure for managing the configuration of TypeScript
#[derive(Debug, Clone)]
pub struct TsConfig(pub Value);
impl TsConfig {
/// Create a new `TsConfig` with the base being the `value` supplied.
pub fn new(value: Value) -> Self {
TsConfig(value)
}
pub fn as_bytes(&self) -> Vec<u8> {
let map = self.0.as_object().unwrap();
let ordered: BTreeMap<_, _> = map.iter().collect();
let value = json!(ordered);
value.to_string().as_bytes().to_owned()
}
/// Return the value of the `checkJs` compiler option, defaulting to `false`
/// if not present.
pub fn get_check_js(&self) -> bool {
if let Some(check_js) = self.0.get("checkJs") {
check_js.as_bool().unwrap_or(false)
} else {
false
}
}
pub fn get_declaration(&self) -> bool {
if let Some(declaration) = self.0.get("declaration") {
declaration.as_bool().unwrap_or(false)
} else {
false
}
}
/// Merge a serde_json value into the configuration.
pub fn merge(&mut self, value: &Value) {
json_merge(&mut self.0, value);
}
/// Take an optional user provided config file
/// which was passed in via the `--config` flag and merge `compilerOptions` with
/// the configuration. Returning the result which optionally contains any
/// compiler options that were ignored.
pub fn merge_tsconfig_from_config_file(
&mut self,
maybe_config_file: Option<&ConfigFile>,
) -> Result<Option<IgnoredCompilerOptions>, AnyError> {
if let Some(config_file) = maybe_config_file {
let (value, maybe_ignored_options) = config_file.to_compiler_options()?;
self.merge(&value);
Ok(maybe_ignored_options)
} else {
Ok(None)
}
}
/// Take a map of compiler options, filtering out any that are ignored, then
/// merge it with the current configuration, returning any options that might
/// have been ignored.
pub fn merge_user_config(
&mut self,
user_options: &HashMap<String, Value>,
) -> Result<Option<IgnoredCompilerOptions>, AnyError> {
let (value, maybe_ignored_options) =
parse_compiler_options(user_options, None, true)?;
self.merge(&value);
Ok(maybe_ignored_options)
}
}
impl Serialize for TsConfig {
/// Serializes inner hash map which is ordered by the key
fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
where
S: Serializer,
{
Serialize::serialize(&self.0, serializer)
}
}
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
pub struct LintRulesConfig {
pub tags: Option<Vec<String>>,
pub include: Option<Vec<String>>,
pub exclude: Option<Vec<String>>,
}
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
struct SerializedFilesConfig {
pub include: Vec<String>,
pub exclude: Vec<String>,
}
impl SerializedFilesConfig {
pub fn into_resolved(
self,
config_file_specifier: &ModuleSpecifier,
) -> Result<FilesConfig, AnyError> {
let config_dir = specifier_parent(config_file_specifier);
Ok(FilesConfig {
include: self
.include
.into_iter()
.map(|p| config_dir.join(&p))
.collect::<Result<Vec<ModuleSpecifier>, _>>()?,
exclude: self
.exclude
.into_iter()
.map(|p| config_dir.join(&p))
.collect::<Result<Vec<ModuleSpecifier>, _>>()?,
})
}
}
#[derive(Clone, Debug, Default)]
pub struct FilesConfig {
pub include: Vec<ModuleSpecifier>,
pub exclude: Vec<ModuleSpecifier>,
}
impl FilesConfig {
/// Gets if the provided specifier is allowed based on the includes
/// and excludes in the configuration file.
pub fn matches_specifier(&self, specifier: &ModuleSpecifier) -> bool {
// Skip files which is in the exclude list.
let specifier_text = specifier.as_str();
if self
.exclude
.iter()
.any(|i| specifier_text.starts_with(i.as_str()))
{
return false;
}
// Ignore files not in the include list if it's not empty.
self.include.is_empty()
|| self
.include
.iter()
.any(|i| specifier_text.starts_with(i.as_str()))
}
}
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
struct SerializedLintConfig {
pub rules: LintRulesConfig,
pub files: SerializedFilesConfig,
}
impl SerializedLintConfig {
pub fn into_resolved(
self,
config_file_specifier: &ModuleSpecifier,
) -> Result<LintConfig, AnyError> {
Ok(LintConfig {
rules: self.rules,
files: self.files.into_resolved(config_file_specifier)?,
})
}
}
#[derive(Clone, Debug, Default)]
pub struct LintConfig {
pub rules: LintRulesConfig,
pub files: FilesConfig,
}
#[derive(Clone, Copy, Debug, Deserialize)]
#[serde(deny_unknown_fields, rename_all = "camelCase")]
pub enum ProseWrap {
Always,
Never,
Preserve,
}
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields, rename_all = "camelCase")]
pub struct FmtOptionsConfig {
pub use_tabs: Option<bool>,
pub line_width: Option<u32>,
pub indent_width: Option<u8>,
pub single_quote: Option<bool>,
pub prose_wrap: Option<ProseWrap>,
}
#[derive(Clone, Debug, Default, Deserialize)]
#[serde(default, deny_unknown_fields)]
struct SerializedFmtConfig {
pub options: FmtOptionsConfig,
pub files: SerializedFilesConfig,
}
impl SerializedFmtConfig {
pub fn into_resolved(
self,
config_file_specifier: &ModuleSpecifier,
) -> Result<FmtConfig, AnyError> {
Ok(FmtConfig {
options: self.options,
files: self.files.into_resolved(config_file_specifier)?,
})
}
}
#[derive(Clone, Debug, Default)]
pub struct FmtConfig {
pub options: FmtOptionsConfig,
pub files: FilesConfig,
}
#[derive(Clone, Debug, Deserialize)]
#[serde(rename_all = "camelCase")]
pub struct ConfigFileJson {
pub compiler_options: Option<Value>,
pub lint: Option<Value>,
pub fmt: Option<Value>,
}
#[derive(Clone, Debug)]
pub struct ConfigFile {
pub specifier: ModuleSpecifier,
pub json: ConfigFileJson,
}
impl ConfigFile {
pub fn read(path_ref: impl AsRef<Path>) -> Result<Self, AnyError> {
let path = Path::new(path_ref.as_ref());
let config_file = if path.is_absolute() {
path.to_path_buf()
} else {
std::env::current_dir()?.join(path_ref)
};
let config_path = canonicalize_path(&config_file).map_err(|_| {
std::io::Error::new(
std::io::ErrorKind::InvalidInput,
format!(
"Could not find the config file: {}",
config_file.to_string_lossy()
),
)
})?;
let config_specifier = ModuleSpecifier::from_file_path(&config_path)
.map_err(|_| {
anyhow!(
"Could not convert path to specifier. Path: {}",
config_path.display()
)
})?;
Self::from_specifier(&config_specifier)
}
pub fn from_specifier(specifier: &ModuleSpecifier) -> Result<Self, AnyError> {
let config_path = specifier_to_file_path(specifier)?;
let config_text = match std::fs::read_to_string(&config_path) {
Ok(text) => text,
Err(err) => bail!(
"Error reading config file {}: {}",
specifier,
err.to_string()
),
};
Self::new(&config_text, specifier)
}
pub fn new(
text: &str,
specifier: &ModuleSpecifier,
) -> Result<Self, AnyError> {
let jsonc = match jsonc_parser::parse_to_serde_value(text) {
Ok(None) => json!({}),
Ok(Some(value)) if value.is_object() => value,
Ok(Some(_)) => {
return Err(anyhow!(
"config file JSON {:?} should be an object",
specifier,
))
}
Err(e) => {
return Err(anyhow!(
"Unable to parse config file JSON {:?} because of {}",
specifier,
e.to_string()
))
}
};
let json: ConfigFileJson = serde_json::from_value(jsonc)?;
Ok(Self {
specifier: specifier.to_owned(),
json,
})
}
/// Returns true if the configuration indicates that JavaScript should be
/// type checked, otherwise false.
pub fn get_check_js(&self) -> bool {
self
.json
.compiler_options
.as_ref()
.map(|co| co.get("checkJs").map(|v| v.as_bool()).flatten())
.flatten()
.unwrap_or(false)
}
/// Parse `compilerOptions` and return a serde `Value`.
/// The result also contains any options that were ignored.
pub fn to_compiler_options(
&self,
) -> Result<(Value, Option<IgnoredCompilerOptions>), AnyError> {
if let Some(compiler_options) = self.json.compiler_options.clone() {
let options: HashMap<String, Value> =
serde_json::from_value(compiler_options)
.context("compilerOptions should be an object")?;
parse_compiler_options(&options, Some(self.specifier.to_owned()), false)
} else {
Ok((json!({}), None))
}
}
pub fn to_lint_config(&self) -> Result<Option<LintConfig>, AnyError> {
if let Some(config) = self.json.lint.clone() {
let lint_config: SerializedLintConfig = serde_json::from_value(config)
.context("Failed to parse \"lint\" configuration")?;
Ok(Some(lint_config.into_resolved(&self.specifier)?))
} else {
Ok(None)
}
}
/// If the configuration file contains "extra" modules (like TypeScript
/// `"types"`) options, return them as imports to be added to a module graph.
pub fn to_maybe_imports(&self) -> MaybeImportsResult {
let mut imports = Vec::new();
let compiler_options_value =
if let Some(value) = self.json.compiler_options.as_ref() {
value
} else {
return Ok(None);
};
let compiler_options: CompilerOptions =
serde_json::from_value(compiler_options_value.clone())?;
if let Some(types) = compiler_options.types {
imports.extend(types);
}
if compiler_options.jsx == Some("react-jsx".to_string()) {
imports.push(format!(
"{}/jsx-runtime",
compiler_options.jsx_import_source.ok_or_else(|| custom_error("TypeError", "Compiler option 'jsx' set to 'react-jsx', but no 'jsxImportSource' defined."))?
));
} else if compiler_options.jsx == Some("react-jsxdev".to_string()) {
imports.push(format!(
"{}/jsx-dev-runtime",
compiler_options.jsx_import_source.ok_or_else(|| custom_error("TypeError", "Compiler option 'jsx' set to 'react-jsxdev', but no 'jsxImportSource' defined."))?
));
}
if !imports.is_empty() {
let referrer = self.specifier.clone();
Ok(Some(vec![(referrer, imports)]))
} else {
Ok(None)
}
}
/// Based on the compiler options in the configuration file, return the
/// implied JSX import source module.
pub fn to_maybe_jsx_import_source_module(&self) -> Option<String> {
let compiler_options_value = self.json.compiler_options.as_ref()?;
let compiler_options: CompilerOptions =
serde_json::from_value(compiler_options_value.clone()).ok()?;
match compiler_options.jsx.as_deref() {
Some("react-jsx") => Some("jsx-runtime".to_string()),
Some("react-jsxdev") => Some("jsx-dev-runtime".to_string()),
_ => None,
}
}
pub fn to_fmt_config(&self) -> Result<Option<FmtConfig>, AnyError> {
if let Some(config) = self.json.fmt.clone() {
let fmt_config: SerializedFmtConfig = serde_json::from_value(config)
.context("Failed to parse \"fmt\" configuration")?;
Ok(Some(fmt_config.into_resolved(&self.specifier)?))
} else {
Ok(None)
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use deno_core::serde_json::json;
#[test]
fn read_config_file_relative() {
let config_file =
ConfigFile::read("tests/testdata/module_graph/tsconfig.json")
.expect("Failed to load config file");
assert!(config_file.json.compiler_options.is_some());
}
#[test]
fn read_config_file_absolute() {
let path = test_util::testdata_path().join("module_graph/tsconfig.json");
let config_file = ConfigFile::read(path.to_str().unwrap())
.expect("Failed to load config file");
assert!(config_file.json.compiler_options.is_some());
}
#[test]
fn include_config_path_on_error() {
let error = ConfigFile::read("404.json").err().unwrap();
assert!(error.to_string().contains("404.json"));
}
#[test]
fn test_json_merge() {
let mut value_a = json!({
"a": true,
"b": "c"
});
let value_b = json!({
"b": "d",
"e": false,
});
json_merge(&mut value_a, &value_b);
assert_eq!(
value_a,
json!({
"a": true,
"b": "d",
"e": false,
})
);
}
#[test]
fn test_parse_config() {
let config_text = r#"{
"compilerOptions": {
"build": true,
// comments are allowed
"strict": true
},
"lint": {
"files": {
"include": ["src/"],
"exclude": ["src/testdata/"]
},
"rules": {
"tags": ["recommended"],
"include": ["ban-untagged-todo"]
}
},
"fmt": {
"files": {
"include": ["src/"],
"exclude": ["src/testdata/"]
},
"options": {
"useTabs": true,
"lineWidth": 80,
"indentWidth": 4,
"singleQuote": true,
"proseWrap": "preserve"
}
}
}"#;
let config_dir = ModuleSpecifier::parse("file:https:///deno/").unwrap();
let config_specifier = config_dir.join("tsconfig.json").unwrap();
let config_file = ConfigFile::new(config_text, &config_specifier).unwrap();
let (options_value, ignored) =
config_file.to_compiler_options().expect("error parsing");
assert!(options_value.is_object());
let options = options_value.as_object().unwrap();
assert!(options.contains_key("strict"));
assert_eq!(options.len(), 1);
assert_eq!(
ignored,
Some(IgnoredCompilerOptions {
items: vec!["build".to_string()],
maybe_specifier: Some(config_specifier),
}),
);
let lint_config = config_file
.to_lint_config()
.expect("error parsing lint object")
.expect("lint object should be defined");
assert_eq!(
lint_config.files.include,
vec![config_dir.join("src/").unwrap()]
);
assert_eq!(
lint_config.files.exclude,
vec![config_dir.join("src/testdata/").unwrap()]
);
assert_eq!(
lint_config.rules.include,
Some(vec!["ban-untagged-todo".to_string()])
);
assert_eq!(
lint_config.rules.tags,
Some(vec!["recommended".to_string()])
);
assert!(lint_config.rules.exclude.is_none());
let fmt_config = config_file
.to_fmt_config()
.expect("error parsing fmt object")
.expect("fmt object should be defined");
assert_eq!(
fmt_config.files.include,
vec![config_dir.join("src/").unwrap()]
);
assert_eq!(
fmt_config.files.exclude,
vec![config_dir.join("src/testdata/").unwrap()]
);
assert_eq!(fmt_config.options.use_tabs, Some(true));
assert_eq!(fmt_config.options.line_width, Some(80));
assert_eq!(fmt_config.options.indent_width, Some(4));
assert_eq!(fmt_config.options.single_quote, Some(true));
}
#[test]
fn test_parse_config_with_empty_file() {
let config_text = "";
let config_specifier =
ModuleSpecifier::parse("file:https:///deno/tsconfig.json").unwrap();
let config_file = ConfigFile::new(config_text, &config_specifier).unwrap();
let (options_value, _) =
config_file.to_compiler_options().expect("error parsing");
assert!(options_value.is_object());
}
#[test]
fn test_parse_config_with_commented_file() {
let config_text = r#"//{"foo":"bar"}"#;
let config_specifier =
ModuleSpecifier::parse("file:https:///deno/tsconfig.json").unwrap();
let config_file = ConfigFile::new(config_text, &config_specifier).unwrap();
let (options_value, _) =
config_file.to_compiler_options().expect("error parsing");
assert!(options_value.is_object());
}
#[test]
fn test_parse_config_with_invalid_file() {
let config_text = "{foo:bar}";
let config_specifier =
ModuleSpecifier::parse("file:https:///deno/tsconfig.json").unwrap();
// Emit error: Unable to parse config file JSON "<config_path>" because of Unexpected token on line 1 column 6.
assert!(ConfigFile::new(config_text, &config_specifier).is_err());
}
#[test]
fn test_parse_config_with_not_object_file() {
let config_text = "[]";
let config_specifier =
ModuleSpecifier::parse("file:https:///deno/tsconfig.json").unwrap();
// Emit error: config file JSON "<config_path>" should be an object
assert!(ConfigFile::new(config_text, &config_specifier).is_err());
}
#[test]
fn test_tsconfig_merge_user_options() {
let mut tsconfig = TsConfig::new(json!({
"target": "esnext",
"module": "esnext",
}));
let user_options = serde_json::from_value(json!({
"target": "es6",
"build": true,
"strict": false,
}))
.expect("could not convert to hashmap");
let maybe_ignored_options = tsconfig
.merge_user_config(&user_options)
.expect("could not merge options");
assert_eq!(
tsconfig.0,
json!({
"module": "esnext",
"target": "es6",
"strict": false,
})
);
assert_eq!(
maybe_ignored_options,
Some(IgnoredCompilerOptions {
items: vec!["build".to_string()],
maybe_specifier: None
})
);
}
#[test]
fn test_tsconfig_as_bytes() {
let mut tsconfig1 = TsConfig::new(json!({
"strict": true,
"target": "esnext",
}));
tsconfig1.merge(&json!({
"target": "es5",
"module": "amd",
}));
let mut tsconfig2 = TsConfig::new(json!({
"target": "esnext",
"strict": true,
}));
tsconfig2.merge(&json!({
"module": "amd",
"target": "es5",
}));
assert_eq!(tsconfig1.as_bytes(), tsconfig2.as_bytes());
}
}