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
|
//! Diagnostic emitted for files that aren't part of any crate.
use hir::{
db::DefDatabase,
diagnostics::{Diagnostic, DiagnosticCode},
InFile,
};
use ide_db::{
base_db::{FileId, FileLoader, SourceDatabase, SourceDatabaseExt},
source_change::SourceChange,
RootDatabase,
};
use syntax::{
ast::{self, ModuleItemOwner, NameOwner},
AstNode, SyntaxNodePtr,
};
use text_edit::TextEdit;
use crate::Fix;
use super::fixes::DiagnosticWithFix;
// Diagnostic: unlinked-file
//
// This diagnostic is shown for files that are not included in any crate, or files that are part of
// crates rust-analyzer failed to discover. The file will not have IDE features available.
#[derive(Debug)]
pub(crate) struct UnlinkedFile {
pub(crate) file_id: FileId,
pub(crate) node: SyntaxNodePtr,
}
impl Diagnostic for UnlinkedFile {
fn code(&self) -> DiagnosticCode {
DiagnosticCode("unlinked-file")
}
fn message(&self) -> String {
"file not included in module tree".to_string()
}
fn display_source(&self) -> InFile<SyntaxNodePtr> {
InFile::new(self.file_id.into(), self.node.clone())
}
fn as_any(&self) -> &(dyn std::any::Any + Send + 'static) {
self
}
}
impl DiagnosticWithFix for UnlinkedFile {
fn fix(&self, sema: &hir::Semantics<RootDatabase>) -> Option<Fix> {
// If there's an existing module that could add a `mod` item to include the unlinked file,
// suggest that as a fix.
let source_root = sema.db.source_root(sema.db.file_source_root(self.file_id));
let our_path = source_root.path_for_file(&self.file_id)?;
let module_name = our_path.name_and_extension()?.0;
// Candidates to look for:
// - `mod.rs` in the same folder
// - we also check `main.rs` and `lib.rs`
// - `$dir.rs` in the parent folder, where `$dir` is the directory containing `self.file_id`
let parent = our_path.parent()?;
let mut paths =
vec![parent.join("mod.rs")?, parent.join("lib.rs")?, parent.join("main.rs")?];
// `submod/bla.rs` -> `submod.rs`
if let Some(newmod) = (|| {
let name = parent.name_and_extension()?.0;
parent.parent()?.join(&format!("{}.rs", name))
})() {
paths.push(newmod);
}
for path in &paths {
if let Some(parent_id) = source_root.file_for_path(path) {
for krate in sema.db.relevant_crates(*parent_id).iter() {
let crate_def_map = sema.db.crate_def_map(*krate);
for (_, module) in crate_def_map.modules() {
if module.origin.is_inline() {
// We don't handle inline `mod parent {}`s, they use different paths.
continue;
}
if module.origin.file_id() == Some(*parent_id) {
return make_fix(sema.db, *parent_id, module_name, self.file_id);
}
}
}
}
}
None
}
}
fn make_fix(
db: &RootDatabase,
parent_file_id: FileId,
new_mod_name: &str,
added_file_id: FileId,
) -> Option<Fix> {
fn is_outline_mod(item: &ast::Item) -> bool {
matches!(item, ast::Item::Module(m) if m.item_list().is_none())
}
let mod_decl = format!("mod {};", new_mod_name);
let ast: ast::SourceFile = db.parse(parent_file_id).tree();
let mut builder = TextEdit::builder();
// If there's an existing `mod m;` statement matching the new one, don't emit a fix (it's
// probably `#[cfg]`d out).
for item in ast.items() {
if let ast::Item::Module(m) = item {
if let Some(name) = m.name() {
if m.item_list().is_none() && name.to_string() == new_mod_name {
cov_mark::hit!(unlinked_file_skip_fix_when_mod_already_exists);
return None;
}
}
}
}
// If there are existing `mod m;` items, append after them (after the first group of them, rather).
match ast
.items()
.skip_while(|item| !is_outline_mod(item))
.take_while(|item| is_outline_mod(item))
.last()
{
Some(last) => {
cov_mark::hit!(unlinked_file_append_to_existing_mods);
builder.insert(last.syntax().text_range().end(), format!("\n{}", mod_decl));
}
None => {
// Prepend before the first item in the file.
match ast.items().next() {
Some(item) => {
cov_mark::hit!(unlinked_file_prepend_before_first_item);
builder.insert(item.syntax().text_range().start(), format!("{}\n\n", mod_decl));
}
None => {
// No items in the file, so just append at the end.
cov_mark::hit!(unlinked_file_empty_file);
builder.insert(ast.syntax().text_range().end(), format!("{}\n", mod_decl));
}
}
}
}
let edit = builder.finish();
let trigger_range = db.parse(added_file_id).tree().syntax().text_range();
Some(Fix::new(
&format!("Insert `{}`", mod_decl),
SourceChange::from_text_edit(parent_file_id, edit),
trigger_range,
))
}
|
