1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
use std::path::{Path, PathBuf};
use bstr::ByteSlice;
use regex::Regex;
#[derive(serde::Deserialize, Debug)]
struct RustcMessage {
rendered: Option<String>,
spans: Vec<Span>,
level: String,
message: String,
children: Vec<RustcMessage>,
}
#[derive(Copy, Clone, Debug, PartialOrd, Ord, PartialEq, Eq)]
pub(crate) enum Level {
Ice = 5,
Error = 4,
Warn = 3,
Help = 2,
Note = 1,
/// Only used for "For more information about this error, try `rustc --explain EXXXX`".
FailureNote = 0,
}
#[derive(Debug)]
/// A diagnostic message.
pub struct Message {
pub(crate) level: Level,
pub(crate) message: String,
}
/// Information about macro expansion.
#[derive(serde::Deserialize, Debug)]
struct Expansion {
span: Span,
}
#[derive(serde::Deserialize, Debug)]
struct Span {
line_start: usize,
file_name: PathBuf,
is_primary: bool,
expansion: Option<Box<Expansion>>,
}
impl std::str::FromStr for Level {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"ERROR" | "error" => Ok(Self::Error),
"WARN" | "warning" => Ok(Self::Warn),
"HELP" | "help" => Ok(Self::Help),
"NOTE" | "note" => Ok(Self::Note),
"failure-note" => Ok(Self::FailureNote),
"error: internal compiler error" => Ok(Self::Ice),
_ => Err(format!("unknown level `{s}`")),
}
}
}
#[derive(Debug)]
pub(crate) struct Diagnostics {
/// Rendered and concatenated version of all diagnostics.
/// This is equivalent to non-json diagnostics.
pub rendered: Vec<u8>,
/// Per line, a list of messages for that line.
pub messages: Vec<Vec<Message>>,
/// Messages not on any line (usually because they are from libstd)
pub messages_from_unknown_file_or_line: Vec<Message>,
}
impl RustcMessage {
fn line(&self, file: &Path) -> Option<usize> {
let span = |primary| self.spans.iter().find_map(|span| span.line(file, primary));
span(true).or_else(|| span(false))
}
/// Put the message and its children into the line-indexed list.
fn insert_recursive(
self,
file: &Path,
messages: &mut Vec<Vec<Message>>,
messages_from_unknown_file_or_line: &mut Vec<Message>,
line: Option<usize>,
) {
let line = self.line(file).or(line);
let msg = Message {
level: self.level.parse().unwrap(),
message: self.message,
};
if let Some(line) = line {
if messages.len() <= line {
messages.resize_with(line + 1, Vec::new);
}
messages[line].push(msg);
// All other messages go into the general bin, unless they are specifically of the
// "aborting due to X previous errors" variety, as we never want to match those. They
// only count the number of errors and provide no useful information about the tests.
} else if !(msg.message.starts_with("aborting due to")
&& msg.message.contains("previous error"))
{
messages_from_unknown_file_or_line.push(msg);
}
for child in self.children {
child.insert_recursive(file, messages, messages_from_unknown_file_or_line, line)
}
}
}
impl Span {
/// Returns the most expanded line number *in the given file*, if possible.
fn line(&self, file: &Path, primary: bool) -> Option<usize> {
if let Some(exp) = &self.expansion {
if let Some(line) = exp.span.line(file, primary && !self.is_primary) {
return Some(line);
}
}
((!primary || self.is_primary) && self.file_name == file).then_some(self.line_start)
}
}
pub(crate) fn filter_annotations_from_rendered(rendered: &str) -> std::borrow::Cow<'_, str> {
let annotations = Regex::new(r" *//(\[[a-z,]+\])?~.*").unwrap();
annotations.replace_all(rendered, "")
}
pub(crate) fn process(file: &Path, stderr: &[u8]) -> Diagnostics {
let mut rendered = Vec::new();
let mut messages = vec![];
let mut messages_from_unknown_file_or_line = vec![];
for (line_number, line) in stderr.lines_with_terminator().enumerate() {
if line.starts_with_str(b"{") {
match serde_json::from_slice::<RustcMessage>(line) {
Ok(msg) => {
rendered.extend(
filter_annotations_from_rendered(msg.rendered.as_ref().unwrap()).as_bytes(),
);
msg.insert_recursive(
file,
&mut messages,
&mut messages_from_unknown_file_or_line,
None,
);
}
Err(err) => {
panic!("failed to parse rustc JSON output at line {line_number}: {err}")
}
}
} else {
// FIXME: do we want to throw interpreter stderr into a separate file?
rendered.extend(line);
}
}
Diagnostics {
rendered,
messages,
messages_from_unknown_file_or_line,
}
}
|
