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https://github.com/denoland/deno.git
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463 lines
14 KiB
Rust
463 lines
14 KiB
Rust
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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//! This module encodes TypeScript errors (diagnostics) into Rust structs and
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//! contains code for printing them to the console.
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// TODO(ry) This module does a lot of JSON parsing manually. It should use
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// serde_json.
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use crate::colors;
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use crate::fmt_errors::format_stack;
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use serde::Deserialize;
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use serde::Deserializer;
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use std::error::Error;
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use std::fmt;
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#[derive(Clone, Debug, Deserialize, PartialEq)]
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#[serde(rename_all = "camelCase")]
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pub struct Diagnostic {
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pub items: Vec<DiagnosticItem>,
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}
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impl fmt::Display for Diagnostic {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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let mut i = 0;
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for item in &self.items {
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if i > 0 {
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write!(f, "\n\n")?;
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}
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write!(f, "{}", item.to_string())?;
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i += 1;
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}
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if i > 1 {
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write!(f, "\n\nFound {} errors.", i)?;
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}
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Ok(())
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}
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}
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impl Error for Diagnostic {
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fn description(&self) -> &str {
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&self.items[0].message
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}
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}
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#[derive(Clone, Debug, Deserialize, PartialEq)]
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#[serde(rename_all = "camelCase")]
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pub struct DiagnosticItem {
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/// The top level message relating to the diagnostic item.
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pub message: String,
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/// A chain of messages, code, and categories of messages which indicate the
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/// full diagnostic information.
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pub message_chain: Option<DiagnosticMessageChain>,
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/// Other diagnostic items that are related to the diagnostic, usually these
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/// are suggestions of why an error occurred.
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pub related_information: Option<Vec<DiagnosticItem>>,
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/// The source line the diagnostic is in reference to.
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pub source_line: Option<String>,
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/// Zero-based index to the line number of the error.
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pub line_number: Option<i64>,
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/// The resource name provided to the TypeScript compiler.
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pub script_resource_name: Option<String>,
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/// Zero-based index to the start position in the entire script resource.
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pub start_position: Option<i64>,
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/// Zero-based index to the end position in the entire script resource.
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pub end_position: Option<i64>,
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pub category: DiagnosticCategory,
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/// This is defined in TypeScript and can be referenced via
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/// [diagnosticMessages.json](https://github.com/microsoft/TypeScript/blob/master/src/compiler/diagnosticMessages.json).
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pub code: i64,
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/// Zero-based index to the start column on `line_number`.
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pub start_column: Option<i64>,
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/// Zero-based index to the end column on `line_number`.
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pub end_column: Option<i64>,
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}
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fn format_category_and_code(
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category: &DiagnosticCategory,
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code: i64,
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) -> String {
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let category = match category {
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DiagnosticCategory::Error => "ERROR".to_string(),
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DiagnosticCategory::Warning => "WARN".to_string(),
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DiagnosticCategory::Debug => "DEBUG".to_string(),
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DiagnosticCategory::Info => "INFO".to_string(),
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_ => "".to_string(),
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};
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let code = colors::bold(format!("TS{}", code.to_string())).to_string();
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format!("{} [{}]", code, category)
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}
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fn format_message(
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message_chain: &Option<DiagnosticMessageChain>,
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message: &str,
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level: usize,
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) -> String {
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debug!("format_message");
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if let Some(message_chain) = message_chain {
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let mut s = message_chain.format_message(level);
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s.pop();
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s
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} else {
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format!("{:indent$}{}", "", message, indent = level)
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}
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}
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/// Formats optional source, line and column numbers into a single string.
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fn format_maybe_frame(
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file_name: Option<String>,
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line_number: Option<i64>,
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column_number: Option<i64>,
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) -> String {
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if file_name.is_none() {
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return "".to_string();
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}
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assert!(line_number.is_some());
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assert!(column_number.is_some());
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let line_number = line_number.unwrap();
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let column_number = column_number.unwrap();
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let file_name_c = colors::cyan(file_name.unwrap());
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let line_c = colors::yellow(line_number.to_string());
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let column_c = colors::yellow(column_number.to_string());
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format!("{}:{}:{}", file_name_c, line_c, column_c)
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}
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fn format_maybe_related_information(
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related_information: &Option<Vec<DiagnosticItem>>,
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) -> String {
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if related_information.is_none() {
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return "".to_string();
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}
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let mut s = String::new();
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if let Some(related_information) = related_information {
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for rd in related_information {
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s.push_str("\n\n");
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s.push_str(&format_stack(
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match rd.category {
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DiagnosticCategory::Error => true,
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_ => false,
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},
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format_message(&rd.message_chain, &rd.message, 0),
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rd.source_line.clone(),
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rd.start_column,
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rd.end_column,
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// Formatter expects 1-based line and column numbers, but ours are 0-based.
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&[format_maybe_frame(
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rd.script_resource_name.clone(),
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rd.line_number.map(|n| n + 1),
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rd.start_column.map(|n| n + 1),
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)],
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4,
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));
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}
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}
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s
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}
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impl fmt::Display for DiagnosticItem {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(
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f,
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"{}",
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format_stack(
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match self.category {
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DiagnosticCategory::Error => true,
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_ => false,
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},
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format!(
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"{}: {}",
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format_category_and_code(&self.category, self.code),
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format_message(&self.message_chain, &self.message, 0)
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),
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self.source_line.clone(),
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self.start_column,
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self.end_column,
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// Formatter expects 1-based line and column numbers, but ours are 0-based.
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&[format_maybe_frame(
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self.script_resource_name.clone(),
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self.line_number.map(|n| n + 1),
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self.start_column.map(|n| n + 1)
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)],
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0
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)
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)?;
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write!(
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f,
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"{}",
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format_maybe_related_information(&self.related_information),
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)
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}
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}
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#[derive(Clone, Debug, Deserialize, PartialEq)]
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#[serde(rename_all = "camelCase")]
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pub struct DiagnosticMessageChain {
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pub message: String,
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pub code: i64,
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pub category: DiagnosticCategory,
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pub next: Option<Vec<DiagnosticMessageChain>>,
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}
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impl DiagnosticMessageChain {
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pub fn format_message(&self, level: usize) -> String {
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let mut s = String::new();
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s.push_str(&std::iter::repeat(" ").take(level * 2).collect::<String>());
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s.push_str(&self.message);
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s.push('\n');
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if let Some(next) = &self.next {
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let arr = next.clone();
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for dm in arr {
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s.push_str(&dm.format_message(level + 1));
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}
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}
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s
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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pub enum DiagnosticCategory {
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Log, // 0
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Debug, // 1
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Info, // 2
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Error, // 3
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Warning, // 4
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Suggestion, // 5
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}
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impl<'de> Deserialize<'de> for DiagnosticCategory {
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fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
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where
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D: Deserializer<'de>,
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{
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let s: i64 = Deserialize::deserialize(deserializer)?;
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Ok(DiagnosticCategory::from(s))
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}
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}
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impl From<i64> for DiagnosticCategory {
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fn from(value: i64) -> Self {
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match value {
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0 => DiagnosticCategory::Log,
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1 => DiagnosticCategory::Debug,
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2 => DiagnosticCategory::Info,
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3 => DiagnosticCategory::Error,
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4 => DiagnosticCategory::Warning,
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5 => DiagnosticCategory::Suggestion,
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_ => panic!("Unknown value: {}", value),
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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 crate::colors::strip_ansi_codes;
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fn diagnostic1() -> Diagnostic {
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Diagnostic {
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items: vec![
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DiagnosticItem {
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message: "Type '(o: T) => { v: any; f: (x: B) => string; }[]' is not assignable to type '(r: B) => Value<B>[]'.".to_string(),
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message_chain: Some(DiagnosticMessageChain {
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message: "Type '(o: T) => { v: any; f: (x: B) => string; }[]' is not assignable to type '(r: B) => Value<B>[]'.".to_string(),
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code: 2322,
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category: DiagnosticCategory::Error,
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next: Some(vec![DiagnosticMessageChain {
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message: "Types of parameters 'o' and 'r' are incompatible.".to_string(),
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code: 2328,
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category: DiagnosticCategory::Error,
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next: Some(vec![DiagnosticMessageChain {
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message: "Type 'B' is not assignable to type 'T'.".to_string(),
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code: 2322,
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category: DiagnosticCategory::Error,
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next: None,
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}]),
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}]),
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}),
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code: 2322,
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category: DiagnosticCategory::Error,
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start_position: Some(267),
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end_position: Some(273),
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source_line: Some(" values: o => [".to_string()),
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line_number: Some(18),
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script_resource_name: Some("deno/tests/complex_diagnostics.ts".to_string()),
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start_column: Some(2),
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end_column: Some(8),
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related_information: Some(vec![
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DiagnosticItem {
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message: "The expected type comes from property 'values' which is declared here on type 'SettingsInterface<B>'".to_string(),
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message_chain: None,
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related_information: None,
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code: 6500,
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source_line: Some(" values?: (r: T) => Array<Value<T>>;".to_string()),
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script_resource_name: Some("deno/tests/complex_diagnostics.ts".to_string()),
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line_number: Some(6),
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start_position: Some(94),
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end_position: Some(100),
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category: DiagnosticCategory::Info,
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start_column: Some(2),
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end_column: Some(8),
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}
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])
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}
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]
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}
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}
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fn diagnostic2() -> Diagnostic {
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Diagnostic {
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items: vec![
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DiagnosticItem {
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message: "Example 1".to_string(),
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message_chain: None,
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code: 2322,
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category: DiagnosticCategory::Error,
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start_position: Some(267),
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end_position: Some(273),
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source_line: Some(" values: o => [".to_string()),
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line_number: Some(18),
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script_resource_name: Some(
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"deno/tests/complex_diagnostics.ts".to_string(),
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),
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start_column: Some(2),
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end_column: Some(8),
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related_information: None,
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},
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DiagnosticItem {
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message: "Example 2".to_string(),
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message_chain: None,
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code: 2000,
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category: DiagnosticCategory::Error,
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start_position: Some(2),
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end_position: Some(2),
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source_line: Some(" values: undefined,".to_string()),
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line_number: Some(128),
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script_resource_name: Some("/foo/bar.ts".to_string()),
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start_column: Some(2),
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end_column: Some(8),
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related_information: None,
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},
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],
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}
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}
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#[test]
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fn from_json() {
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let r = serde_json::from_str::<Diagnostic>(
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&r#"{
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"items": [
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{
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"message": "Type '{ a(): { b: number; }; }' is not assignable to type '{ a(): { b: string; }; }'.",
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"messageChain": {
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"message": "Type '{ a(): { b: number; }; }' is not assignable to type '{ a(): { b: string; }; }'.",
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"code": 2322,
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"category": 3,
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"next": [
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{
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"message": "Types of property 'a' are incompatible.",
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"code": 2326,
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"category": 3
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}
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]
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},
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"code": 2322,
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"category": 3,
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"startPosition": 352,
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"endPosition": 353,
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"sourceLine": "x = y;",
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"lineNumber": 29,
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"scriptResourceName": "/deno/tests/error_003_typescript.ts",
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"startColumn": 0,
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"endColumn": 1
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}
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]
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}"#,
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).unwrap();
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let expected =
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Diagnostic {
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items: vec![
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DiagnosticItem {
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message: "Type \'{ a(): { b: number; }; }\' is not assignable to type \'{ a(): { b: string; }; }\'.".to_string(),
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message_chain: Some(
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DiagnosticMessageChain {
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message: "Type \'{ a(): { b: number; }; }\' is not assignable to type \'{ a(): { b: string; }; }\'.".to_string(),
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code: 2322,
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category: DiagnosticCategory::Error,
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next: Some(vec![
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DiagnosticMessageChain {
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message: "Types of property \'a\' are incompatible.".to_string(),
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code: 2326,
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category: DiagnosticCategory::Error,
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next: None,
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}
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])
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}
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),
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related_information: None,
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source_line: Some("x = y;".to_string()),
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line_number: Some(29),
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script_resource_name: Some("/deno/tests/error_003_typescript.ts".to_string()),
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start_position: Some(352),
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end_position: Some(353),
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category: DiagnosticCategory::Error,
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code: 2322,
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start_column: Some(0),
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end_column: Some(1)
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}
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]
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};
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assert_eq!(expected, r);
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}
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#[test]
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fn diagnostic_to_string1() {
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let d = diagnostic1();
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let expected = "TS2322 [ERROR]: Type \'(o: T) => { v: any; f: (x: B) => string; }[]\' is not assignable to type \'(r: B) => Value<B>[]\'.\n Types of parameters \'o\' and \'r\' are incompatible.\n Type \'B\' is not assignable to type \'T\'.\n values: o => [\n ~~~~~~\n at deno/tests/complex_diagnostics.ts:19:3\n\n The expected type comes from property \'values\' which is declared here on type \'SettingsInterface<B>\'\n values?: (r: T) => Array<Value<T>>;\n ~~~~~~\n at deno/tests/complex_diagnostics.ts:7:3";
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assert_eq!(expected, strip_ansi_codes(&d.to_string()));
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}
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#[test]
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fn diagnostic_to_string2() {
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let d = diagnostic2();
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let expected = "TS2322 [ERROR]: Example 1\n values: o => [\n ~~~~~~\n at deno/tests/complex_diagnostics.ts:19:3\n\nTS2000 [ERROR]: Example 2\n values: undefined,\n ~~~~~~\n at /foo/bar.ts:129:3\n\nFound 2 errors.";
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assert_eq!(expected, strip_ansi_codes(&d.to_string()));
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}
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#[test]
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fn test_format_none_frame() {
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let actual = format_maybe_frame(None, None, None);
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assert_eq!(actual, "");
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}
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#[test]
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fn test_format_some_frame() {
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let actual = format_maybe_frame(
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Some("file://foo/bar.ts".to_string()),
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Some(1),
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Some(2),
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);
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assert_eq!(strip_ansi_codes(&actual), "file://foo/bar.ts:1:2");
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}
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}
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