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abe8a113ad
This is in preperation for dynamic import (#1789), which is more easily implemented when errors are dynamic.
614 lines
19 KiB
Rust
614 lines
19 KiB
Rust
// Copyright 2018-2019 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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use crate::ansi;
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use crate::fmt_errors::format_maybe_source_line;
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use crate::fmt_errors::format_maybe_source_name;
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use crate::fmt_errors::DisplayFormatter;
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use serde_json;
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use serde_json::value::Value;
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use std::error::Error;
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use std::fmt;
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#[derive(Debug, PartialEq, Clone)]
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pub struct Diagnostic {
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pub items: Vec<DiagnosticItem>,
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}
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impl Diagnostic {
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/// Take a JSON value and attempt to map it to a
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pub fn from_json_value(v: &serde_json::Value) -> Option<Self> {
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if !v.is_object() {
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return None;
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}
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let obj = v.as_object().unwrap();
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let mut items = Vec::<DiagnosticItem>::new();
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let items_v = &obj["items"];
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if items_v.is_array() {
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let items_values = items_v.as_array().unwrap();
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for item_v in items_values {
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items.push(DiagnosticItem::from_json_value(item_v));
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}
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}
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Some(Self { items })
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}
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pub fn from_emit_result(json_str: &str) -> Option<Self> {
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let v = serde_json::from_str::<serde_json::Value>(json_str)
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.expect("Error decoding JSON string.");
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let diagnostics_o = v.get("diagnostics");
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if let Some(diagnostics_v) = diagnostics_o {
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return Self::from_json_value(diagnostics_v);
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}
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None
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}
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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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writeln!(f)?;
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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.\n", 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(Debug, PartialEq, Clone)]
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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<Box<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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impl DiagnosticItem {
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pub fn from_json_value(v: &serde_json::Value) -> Self {
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let obj = v.as_object().unwrap();
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// required attributes
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let message = obj
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.get("message")
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.and_then(|v| v.as_str().map(String::from))
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.unwrap();
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let category = DiagnosticCategory::from(
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obj.get("category").and_then(Value::as_i64).unwrap(),
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);
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let code = obj.get("code").and_then(Value::as_i64).unwrap();
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// optional attributes
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let source_line = obj
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.get("sourceLine")
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.and_then(|v| v.as_str().map(String::from));
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let script_resource_name = obj
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.get("scriptResourceName")
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.and_then(|v| v.as_str().map(String::from));
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let line_number = obj.get("lineNumber").and_then(Value::as_i64);
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let start_position = obj.get("startPosition").and_then(Value::as_i64);
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let end_position = obj.get("endPosition").and_then(Value::as_i64);
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let start_column = obj.get("startColumn").and_then(Value::as_i64);
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let end_column = obj.get("endColumn").and_then(Value::as_i64);
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let message_chain_v = obj.get("messageChain");
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let message_chain = match message_chain_v {
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Some(v) => DiagnosticMessageChain::from_json_value(v),
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_ => None,
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};
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let related_information_v = obj.get("relatedInformation");
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let related_information = match related_information_v {
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Some(r) => {
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let mut related_information = Vec::<DiagnosticItem>::new();
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let related_info_values = r.as_array().unwrap();
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for related_info_v in related_info_values {
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related_information
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.push(DiagnosticItem::from_json_value(related_info_v));
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}
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Some(related_information)
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}
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_ => None,
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};
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Self {
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message,
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message_chain,
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related_information,
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code,
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source_line,
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script_resource_name,
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line_number,
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start_position,
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end_position,
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category,
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start_column,
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end_column,
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}
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}
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}
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impl DisplayFormatter for DiagnosticItem {
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fn format_category_and_code(&self) -> String {
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let category = match self.category {
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DiagnosticCategory::Error => {
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format!("{}", ansi::red_bold("error".to_string()))
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}
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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 = ansi::bold(format!(" TS{}", self.code.to_string())).to_string();
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format!("{}{}: ", category, code)
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}
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fn format_message(&self, level: usize) -> String {
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if self.message_chain.is_none() {
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return format!("{:indent$}{}", "", self.message, indent = level);
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}
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let mut s = String::new();
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let mut i = level / 2;
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let mut item_o = self.message_chain.clone();
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while item_o.is_some() {
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let item = item_o.unwrap();
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s.push_str(&std::iter::repeat(" ").take(i * 2).collect::<String>());
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s.push_str(&item.message);
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s.push('\n');
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item_o = item.next.clone();
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i += 1;
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}
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s.pop();
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s
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}
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fn format_related_info(&self) -> String {
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if self.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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let related_information = self.related_information.clone().unwrap();
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for related_diagnostic in related_information {
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let rd = &related_diagnostic;
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s.push_str(&format!(
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"\n{}\n\n ► {}{}\n",
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rd.format_message(2),
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rd.format_source_name(),
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rd.format_source_line(4),
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));
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}
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s
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}
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fn format_source_line(&self, level: usize) -> String {
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format_maybe_source_line(
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self.source_line.clone(),
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self.line_number,
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self.start_column,
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self.end_column,
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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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level,
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)
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}
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fn format_source_name(&self) -> String {
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format_maybe_source_name(
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self.script_resource_name.clone(),
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self.line_number,
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self.start_column,
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)
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}
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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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"{}{}\n\n► {}{}{}",
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self.format_category_and_code(),
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self.format_message(0),
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self.format_source_name(),
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self.format_source_line(0),
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self.format_related_info(),
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)
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}
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}
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#[derive(Debug, PartialEq, Clone)]
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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<Box<DiagnosticMessageChain>>,
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}
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impl DiagnosticMessageChain {
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pub fn from_json_value(v: &serde_json::Value) -> Option<Box<Self>> {
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if !v.is_object() {
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return None;
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}
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let obj = v.as_object().unwrap();
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let message = obj
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.get("message")
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.and_then(|v| v.as_str().map(String::from))
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.unwrap();
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let code = obj.get("code").and_then(Value::as_i64).unwrap();
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let category = DiagnosticCategory::from(
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obj.get("category").and_then(Value::as_i64).unwrap(),
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);
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let next_v = obj.get("next");
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let next = match next_v {
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Some(n) => DiagnosticMessageChain::from_json_value(n),
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_ => None,
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};
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Some(Box::new(Self {
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message,
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code,
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category,
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next,
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}))
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}
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}
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#[derive(Debug, PartialEq, Clone)]
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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 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::ansi::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(Box::new(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(Box::new(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(Box::new(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 v = serde_json::from_str::<serde_json::Value>(
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&r#"{
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"items": [
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{
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"message": "Type '(o: T) => { v: any; f: (x: B) => string; }[]' is not assignable to type '(r: B) => Value<B>[]'.",
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"messageChain": {
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"message": "Type '(o: T) => { v: any; f: (x: B) => string; }[]' is not assignable to type '(r: B) => Value<B>[]'.",
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"code": 2322,
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"category": 3,
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"next": {
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"message": "Types of parameters 'o' and 'r' are incompatible.",
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"code": 2328,
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"category": 3,
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"next": {
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"message": "Type 'B' is not assignable to type 'T'.",
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"code": 2322,
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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": 235,
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"endPosition": 241,
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"sourceLine": " values: o => [",
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"lineNumber": 18,
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"scriptResourceName": "/deno/tests/complex_diagnostics.ts",
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"startColumn": 2,
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"endColumn": 8,
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"relatedInformation": [
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{
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"message": "The expected type comes from property 'values' which is declared here on type 'C<B>'",
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"code": 6500,
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"category": 2,
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"startPosition": 78,
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"endPosition": 84,
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"sourceLine": " values?: (r: T) => Array<Value<T>>;",
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"lineNumber": 6,
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"scriptResourceName": "/deno/tests/complex_diagnostics.ts",
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"startColumn": 2,
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"endColumn": 8
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}
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]
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},
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{
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"message": "Property 't' does not exist on type 'T'.",
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"code": 2339,
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"category": 3,
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"startPosition": 267,
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"endPosition": 268,
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"sourceLine": " v: o.t,",
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"lineNumber": 20,
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"scriptResourceName": "/deno/tests/complex_diagnostics.ts",
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"startColumn": 11,
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"endColumn": 12
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}
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]
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}"#,
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).unwrap();
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let r = Diagnostic::from_json_value(&v);
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let expected = Some(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(Box::new(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(Box::new(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(Box::new(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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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 'C<B>'".to_string(),
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message_chain: None,
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related_information: None,
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source_line: Some(" values?: (r: T) => Array<Value<T>>;".to_string()),
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line_number: Some(6),
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script_resource_name: Some("/deno/tests/complex_diagnostics.ts".to_string()),
|
|
start_position: Some(78),
|
|
end_position: Some(84),
|
|
category: DiagnosticCategory::Info,
|
|
code: 6500,
|
|
start_column: Some(2),
|
|
end_column: Some(8),
|
|
}
|
|
]),
|
|
source_line: Some(" values: o => [".to_string()),
|
|
line_number: Some(18),
|
|
script_resource_name: Some("/deno/tests/complex_diagnostics.ts".to_string()),
|
|
start_position: Some(235),
|
|
end_position: Some(241),
|
|
category: DiagnosticCategory::Error,
|
|
code: 2322,
|
|
start_column: Some(2),
|
|
end_column: Some(8),
|
|
},
|
|
DiagnosticItem {
|
|
message: "Property 't' does not exist on type 'T'.".to_string(),
|
|
message_chain: None,
|
|
related_information: None,
|
|
source_line: Some(" v: o.t,".to_string()),
|
|
line_number: Some(20),
|
|
script_resource_name: Some("/deno/tests/complex_diagnostics.ts".to_string()),
|
|
start_position: Some(267),
|
|
end_position: Some(268),
|
|
category: DiagnosticCategory::Error,
|
|
code: 2339,
|
|
start_column: Some(11),
|
|
end_column: Some(12),
|
|
},
|
|
],
|
|
});
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[test]
|
|
fn from_emit_result() {
|
|
let r = Diagnostic::from_emit_result(
|
|
&r#"{
|
|
"emitSkipped": false,
|
|
"diagnostics": {
|
|
"items": [
|
|
{
|
|
"message": "foo bar",
|
|
"code": 9999,
|
|
"category": 3
|
|
}
|
|
]
|
|
}
|
|
}"#,
|
|
);
|
|
let expected = Some(Diagnostic {
|
|
items: vec![DiagnosticItem {
|
|
message: "foo bar".to_string(),
|
|
message_chain: None,
|
|
related_information: None,
|
|
source_line: None,
|
|
line_number: None,
|
|
script_resource_name: None,
|
|
start_position: None,
|
|
end_position: None,
|
|
category: DiagnosticCategory::Error,
|
|
code: 9999,
|
|
start_column: None,
|
|
end_column: None,
|
|
}],
|
|
});
|
|
assert_eq!(expected, r);
|
|
}
|
|
|
|
#[test]
|
|
fn from_emit_result_none() {
|
|
let r = &r#"{"emitSkipped":false}"#;
|
|
assert!(Diagnostic::from_emit_result(r).is_none());
|
|
}
|
|
|
|
#[test]
|
|
fn diagnostic_to_string1() {
|
|
let d = diagnostic1();
|
|
let expected = "error TS2322: 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\n► deno/tests/complex_diagnostics.ts:19:3\n\n19 values: o => [\n ~~~~~~\n\n The expected type comes from property \'values\' which is declared here on type \'SettingsInterface<B>\'\n\n ► deno/tests/complex_diagnostics.ts:7:3\n\n 7 values?: (r: T) => Array<Value<T>>;\n ~~~~~~\n\n";
|
|
assert_eq!(expected, strip_ansi_codes(&d.to_string()));
|
|
}
|
|
|
|
#[test]
|
|
fn diagnostic_to_string2() {
|
|
let d = diagnostic2();
|
|
let expected = "error TS2322: Example 1\n\n► deno/tests/complex_diagnostics.ts:19:3\n\n19 values: o => [\n ~~~~~~\n\nerror TS2000: Example 2\n\n► /foo/bar.ts:129:3\n\n129 values: undefined,\n ~~~~~~\n\n\nFound 2 errors.\n";
|
|
assert_eq!(expected, strip_ansi_codes(&d.to_string()));
|
|
}
|
|
}
|