Add miette-schema

This commit is contained in:
Aria Beingessner 2023-03-28 13:28:08 -04:00
parent 78fe18e699
commit 64de78432a
6 changed files with 665 additions and 1 deletions

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@ -39,6 +39,10 @@ syn = { version = "1.0", features = ["full"] }
regex = "1.5"
lazy_static = "1.4"
# JSON Schema devdeps
miette-schema = { version = "5.6.0", path = "miette-schema" }
serde_json = "1.0.95"
[features]
default = []
fancy-no-backtrace = [
@ -56,7 +60,7 @@ fancy = [
]
[workspace]
members = ["miette-derive"]
members = ["miette-derive", "miette-schema"]
[package.metadata.docs.rs]
all-features = true

18
miette-schema/Cargo.toml Normal file
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@ -0,0 +1,18 @@
[package]
name = "miette-schema"
version = "5.6.0"
authors = ["Kat Marchán <kzm@zkat.tech>"]
edition = "2018"
license = "Apache-2.0"
description = "Type definitions for the JSON Schema of miette's json output"
repository = "https://github.com/zkat/miette"
[features]
default = ["schemars", "serde"]
[dependencies]
schemars = { version = "0.8.12", optional = true }
serde = { version = "1.0.159", features = ["derive"], optional = true }
[dev-dependencies]
serde_json = "1.0.95"

229
miette-schema/LICENSE Normal file
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@ -0,0 +1,229 @@
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@ -0,0 +1,208 @@
{
"$schema": "http://json-schema.org/draft-07/schema#",
"title": "Diagnostic",
"description": "A miette diagnostic, the top level type of miette's json output",
"type": "object",
"properties": {
"causes": {
"description": "The underlying causes of this error (similar to a backtrace)",
"default": [],
"type": "array",
"items": {
"type": "string"
}
},
"code": {
"description": "The error code\n\ne.g. \"oops::my::bad\" or \"E1312\"",
"default": "",
"type": "string"
},
"filename": {
"description": "The name of the source file that caused the diagnostic",
"default": "",
"type": "string"
},
"help": {
"description": "An additional piece of advice on how to address the diagnostic\n\ne.g. \"try removing this trailing comma\"",
"default": "",
"type": "string"
},
"labels": {
"description": "Labels/spans referring to the locations in the source that are relevant to the diagnostic\n\nSee \"filename\" for the source file these labels refer to\n\ne.g. \"here's the extra comma you should remove\" (offset: 100, len: 1)",
"default": [],
"type": "array",
"items": {
"$ref": "#/definitions/Label"
}
},
"message": {
"description": "The primary error message",
"default": "",
"type": "string"
},
"related": {
"description": "Related Diagnostics nested under this one\n\nThis can be used to report multiple diagnostics at once, by e.g. having a vague top-level diagnostic like \"failed to compile\" with the more specific issues nested underneath it.",
"default": [],
"type": "array",
"items": {
"$ref": "#/definitions/Diagnostic"
}
},
"severity": {
"description": "The severity of the error (error, warning, advice, ...)",
"default": "error",
"allOf": [
{
"$ref": "#/definitions/Severity"
}
]
},
"url": {
"description": "A URL to visit to get more information on this error",
"default": "",
"type": "string"
}
},
"definitions": {
"Diagnostic": {
"description": "A miette diagnostic, the top level type of miette's json output",
"type": "object",
"properties": {
"causes": {
"description": "The underlying causes of this error (similar to a backtrace)",
"default": [],
"type": "array",
"items": {
"type": "string"
}
},
"code": {
"description": "The error code\n\ne.g. \"oops::my::bad\" or \"E1312\"",
"default": "",
"type": "string"
},
"filename": {
"description": "The name of the source file that caused the diagnostic",
"default": "",
"type": "string"
},
"help": {
"description": "An additional piece of advice on how to address the diagnostic\n\ne.g. \"try removing this trailing comma\"",
"default": "",
"type": "string"
},
"labels": {
"description": "Labels/spans referring to the locations in the source that are relevant to the diagnostic\n\nSee \"filename\" for the source file these labels refer to\n\ne.g. \"here's the extra comma you should remove\" (offset: 100, len: 1)",
"default": [],
"type": "array",
"items": {
"$ref": "#/definitions/Label"
}
},
"message": {
"description": "The primary error message",
"default": "",
"type": "string"
},
"related": {
"description": "Related Diagnostics nested under this one\n\nThis can be used to report multiple diagnostics at once, by e.g. having a vague top-level diagnostic like \"failed to compile\" with the more specific issues nested underneath it.",
"default": [],
"type": "array",
"items": {
"$ref": "#/definitions/Diagnostic"
}
},
"severity": {
"description": "The severity of the error (error, warning, advice, ...)",
"default": "error",
"allOf": [
{
"$ref": "#/definitions/Severity"
}
]
},
"url": {
"description": "A URL to visit to get more information on this error",
"default": "",
"type": "string"
}
}
},
"Label": {
"description": "A label/span indicating relevant portions of a source file for a Diagnostic",
"type": "object",
"properties": {
"label": {
"description": "The label/message for the span",
"default": "",
"type": "string"
},
"span": {
"description": "The actual span/range of source code that we're referring to",
"default": {
"length": 0,
"offset": 0
},
"allOf": [
{
"$ref": "#/definitions/Span"
}
]
}
}
},
"Severity": {
"description": "The severity of a diagnostic",
"oneOf": [
{
"description": "This is an error",
"type": "string",
"enum": [
"error"
]
},
{
"description": "This is a warning",
"type": "string",
"enum": [
"warning"
]
},
{
"description": "This is just some advice",
"type": "string",
"enum": [
"advice"
]
},
{
"description": "A dummy variant for forward/backward-compatibility with other versions of miette which may one day introduce more kinds of Severity. Any unknown ones will be mapped to this variant.",
"type": "string",
"enum": [
"_unknown"
]
}
]
},
"Span": {
"description": "A span/range of source code",
"type": "object",
"properties": {
"length": {
"description": "How many bytes the span contains",
"default": 0,
"type": "integer",
"format": "uint64",
"minimum": 0.0
},
"offset": {
"description": "The byte offset where the span starts",
"default": 0,
"type": "integer",
"format": "uint64",
"minimum": 0.0
}
}
}
}
}

173
miette-schema/src/lib.rs Normal file
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@ -0,0 +1,173 @@
#![deny(missing_docs)]
//! # miette-schema
//!
//! This library provides type definitions and derives for
//! Serializing/Deserializing miette's JSON output using serde, and for getting
//! a schema of the format. The schema is based on [schemars][], which
//! understands your serde attributes.
//!
//! This idea is that if you have your own JSON output that may include miette
//! JSON output, you can slap the top-level [`Diagnostic`][] type in your own
//! types and get serde able to read/write it properly, and if you want a schema
//! for your entire output format then you can just slap `#[derive(JsonSchema)]`
//! on your own types and use `schemars::schema_for!(MyType)` to get the final
//! JSON Schema.
//!
//! The type definitions here are more conservative than what miette's JSON
//! output actually looks like to make the schema maximally
//! forward/backward-compatible with past/future versions of miette.
//!
//! Basically you should ideally assume every field is Optional because
//! older versions might be missing it and newer versions might remove it. Not
//! because we have any plans to break the format, but just because it's Best
//! Practice to prepare for that eventuality and interchange formats inevitably
//! result in version drift. We implement this by placing `#[serde(default)]` on
//! everything we can.
//!
//! This pretty closely matches how miette's JSON Output works in practice
//! today: every field is always emitted, and it just emits an empty string or
//! an empty array when there's no value. So in practice the
//! `#[serde(default)]`s won't ever be stressed, because miette itself pre-bakes
//! them in. So write code that's aware of empty strings!
//!
//! You also need to be tolerant of additional things being added in the future,
//! but thankfully that's just how Json Schema and serde already work, by
//! silently dropping unknown values on the floor... except for enum variants.
//!
//! We had to add an extra Unknown variant to every enum to capture "unknown
//! variants". Simply making the enum `#[non_exhaustive]` is insufficient
//! because the Rust compiler needs to put *something* there at runtime.
//!
//! [schemars]: https://docs.rs/schemars/latest/schemars/
#[cfg(feature = "schemars")]
use schemars::JsonSchema;
#[cfg(feature = "serde")]
use serde::{Deserialize, Serialize};
/// A miette diagnostic, the top level type of miette's json output
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "schemars", derive(JsonSchema))]
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Default)]
pub struct Diagnostic {
/// The primary error message
#[serde(default)]
message: String,
/// The error code
///
/// e.g. "oops::my::bad" or "E1312"
#[serde(default)]
code: String,
/// The severity of the error (error, warning, advice, ...)
#[serde(default)]
severity: Severity,
/// The underlying causes of this error (similar to a backtrace)
#[serde(default)]
causes: Vec<String>,
/// A URL to visit to get more information on this error
#[serde(default)]
url: String,
/// An additional piece of advice on how to address the diagnostic
///
/// e.g. "try removing this trailing comma"
#[serde(default)]
help: String,
/// Labels/spans referring to the locations in the source that are relevant
/// to the diagnostic
///
/// See "filename" for the source file these labels refer to
///
/// e.g. "here's the extra comma you should remove" (offset: 100, len: 1)
#[serde(default)]
labels: Vec<Label>,
/// Related Diagnostics nested under this one
///
/// This can be used to report multiple diagnostics at once, by e.g.
/// having a vague top-level diagnostic like "failed to compile" with the
/// more specific issues nested underneath it.
#[serde(default)]
related: Vec<Diagnostic>,
/// The name of the source file that caused the diagnostic
#[serde(default)]
filename: String,
}
/// The severity of a diagnostic
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "schemars", derive(JsonSchema))]
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Default)]
pub enum Severity {
/// This is an error
#[serde(rename = "error")]
#[default]
Error,
/// This is a warning
#[serde(rename = "warning")]
Warning,
/// This is just some advice
#[serde(rename = "advice")]
Advice,
/// A dummy variant for forward/backward-compatibility with other versions
/// of miette which may one day introduce more kinds of Severity. Any
/// unknown ones will be mapped to this variant.
#[serde(other, rename = "_unknown")]
Unknown,
}
/// A label/span indicating relevant portions of a source file for a Diagnostic
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "schemars", derive(JsonSchema))]
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Default)]
pub struct Label {
/// The label/message for the span
#[serde(default)]
label: String,
/// The actual span/range of source code that we're referring to
#[serde(default)]
span: Span,
}
/// A span/range of source code
#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
#[cfg_attr(feature = "schemars", derive(JsonSchema))]
#[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash, Default)]
pub struct Span {
/// The byte offset where the span starts
#[serde(default)]
offset: u64,
/// How many bytes the span contains
#[serde(default)]
length: u64,
}
impl Diagnostic {
/// Get the JSON Schema for a Diagnostic
pub fn json_schema() -> schemars::schema::RootSchema {
schemars::schema_for!(Diagnostic)
}
}
#[test]
fn emit() {
use std::fs::File;
use std::io::BufWriter;
use std::io::Write;
use std::path::PathBuf;
let schema = Diagnostic::json_schema();
let json_schema = serde_json::to_string_pretty(&schema).unwrap();
// FIXME: (?) we should use something like xtask to update the schema, but this
// works ok.
let root = std::env!("CARGO_MANIFEST_DIR");
let schema = PathBuf::from(root).join("miette-json-schema.json");
let file = File::options()
.create(true)
.write(true)
.truncate(true)
.open(schema)
.unwrap();
let mut file = BufWriter::new(file);
writeln!(&mut file, "{json_schema}").unwrap();
}

View File

@ -56,6 +56,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -102,6 +104,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -148,6 +152,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -194,6 +200,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -239,6 +247,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -285,6 +295,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -351,6 +363,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -397,6 +411,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -460,6 +476,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -536,6 +554,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -592,6 +612,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -648,6 +670,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -704,6 +728,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -732,6 +758,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -826,6 +854,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
@ -924,6 +954,8 @@ mod json_report_handler {
.map(|s| s.trim_matches(|c| c == ' ' || c == '\n'))
.collect();
assert_eq!(expected, out);
serde_json::from_str::<miette_schema::Diagnostic>(&expected)
.expect("JSON Schema can't read output");
Ok(())
}
}