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-rw-r--r--crates/ide/src/diagnostics.rs163
-rw-r--r--crates/ide/src/diagnostics/unlinked_file.rs156
2 files changed, 316 insertions, 3 deletions
diff --git a/crates/ide/src/diagnostics.rs b/crates/ide/src/diagnostics.rs
index fe32f39b6..22697a537 100644
--- a/crates/ide/src/diagnostics.rs
+++ b/crates/ide/src/diagnostics.rs
@@ -6,6 +6,7 @@
6 6
7mod fixes; 7mod fixes;
8mod field_shorthand; 8mod field_shorthand;
9mod unlinked_file;
9 10
10use std::cell::RefCell; 11use std::cell::RefCell;
11 12
@@ -22,6 +23,7 @@ use syntax::{
22 SyntaxNode, SyntaxNodePtr, TextRange, 23 SyntaxNode, SyntaxNodePtr, TextRange,
23}; 24};
24use text_edit::TextEdit; 25use text_edit::TextEdit;
26use unlinked_file::UnlinkedFile;
25 27
26use crate::{FileId, Label, SourceChange}; 28use crate::{FileId, Label, SourceChange};
27 29
@@ -156,6 +158,18 @@ pub(crate) fn diagnostics(
156 .with_code(Some(d.code())), 158 .with_code(Some(d.code())),
157 ); 159 );
158 }) 160 })
161 .on::<UnlinkedFile, _>(|d| {
162 // Override severity and mark as unused.
163 res.borrow_mut().push(
164 Diagnostic::hint(
165 sema.diagnostics_display_range(d.display_source()).range,
166 d.message(),
167 )
168 .with_unused(true)
169 .with_fix(d.fix(&sema))
170 .with_code(Some(d.code())),
171 );
172 })
159 .on::<hir::diagnostics::UnresolvedProcMacro, _>(|d| { 173 .on::<hir::diagnostics::UnresolvedProcMacro, _>(|d| {
160 // Use more accurate position if available. 174 // Use more accurate position if available.
161 let display_range = d 175 let display_range = d
@@ -197,9 +211,13 @@ pub(crate) fn diagnostics(
197 ); 211 );
198 }); 212 });
199 213
200 if let Some(m) = sema.to_module_def(file_id) { 214 match sema.to_module_def(file_id) {
201 m.diagnostics(db, &mut sink); 215 Some(m) => m.diagnostics(db, &mut sink),
202 }; 216 None => {
217 sink.push(UnlinkedFile { file_id, node: SyntaxNodePtr::new(&parse.tree().syntax()) });
218 }
219 }
220
203 drop(sink); 221 drop(sink);
204 res.into_inner() 222 res.into_inner()
205} 223}
@@ -307,6 +325,17 @@ mod tests {
307 ); 325 );
308 } 326 }
309 327
328 /// Checks that there's a diagnostic *without* fix at `$0`.
329 fn check_no_fix(ra_fixture: &str) {
330 let (analysis, file_position) = fixture::position(ra_fixture);
331 let diagnostic = analysis
332 .diagnostics(&DiagnosticsConfig::default(), file_position.file_id)
333 .unwrap()
334 .pop()
335 .unwrap();
336 assert!(diagnostic.fix.is_none(), "got a fix when none was expected: {:?}", diagnostic);
337 }
338
310 /// Takes a multi-file input fixture with annotated cursor position and checks that no diagnostics 339 /// Takes a multi-file input fixture with annotated cursor position and checks that no diagnostics
311 /// apply to the file containing the cursor. 340 /// apply to the file containing the cursor.
312 pub(crate) fn check_no_diagnostics(ra_fixture: &str) { 341 pub(crate) fn check_no_diagnostics(ra_fixture: &str) {
@@ -975,4 +1004,132 @@ impl TestStruct {
975 1004
976 check_fix(input, expected); 1005 check_fix(input, expected);
977 } 1006 }
1007
1008 #[test]
1009 fn unlinked_file_prepend_first_item() {
1010 cov_mark::check!(unlinked_file_prepend_before_first_item);
1011 check_fix(
1012 r#"
1013//- /main.rs
1014fn f() {}
1015//- /foo.rs
1016$0
1017"#,
1018 r#"
1019mod foo;
1020
1021fn f() {}
1022"#,
1023 );
1024 }
1025
1026 #[test]
1027 fn unlinked_file_append_mod() {
1028 cov_mark::check!(unlinked_file_append_to_existing_mods);
1029 check_fix(
1030 r#"
1031//- /main.rs
1032//! Comment on top
1033
1034mod preexisting;
1035
1036mod preexisting2;
1037
1038struct S;
1039
1040mod preexisting_bottom;)
1041//- /foo.rs
1042$0
1043"#,
1044 r#"
1045//! Comment on top
1046
1047mod preexisting;
1048
1049mod preexisting2;
1050mod foo;
1051
1052struct S;
1053
1054mod preexisting_bottom;)
1055"#,
1056 );
1057 }
1058
1059 #[test]
1060 fn unlinked_file_insert_in_empty_file() {
1061 cov_mark::check!(unlinked_file_empty_file);
1062 check_fix(
1063 r#"
1064//- /main.rs
1065//- /foo.rs
1066$0
1067"#,
1068 r#"
1069mod foo;
1070"#,
1071 );
1072 }
1073
1074 #[test]
1075 fn unlinked_file_old_style_modrs() {
1076 check_fix(
1077 r#"
1078//- /main.rs
1079mod submod;
1080//- /submod/mod.rs
1081// in mod.rs
1082//- /submod/foo.rs
1083$0
1084"#,
1085 r#"
1086// in mod.rs
1087mod foo;
1088"#,
1089 );
1090 }
1091
1092 #[test]
1093 fn unlinked_file_new_style_mod() {
1094 check_fix(
1095 r#"
1096//- /main.rs
1097mod submod;
1098//- /submod.rs
1099//- /submod/foo.rs
1100$0
1101"#,
1102 r#"
1103mod foo;
1104"#,
1105 );
1106 }
1107
1108 #[test]
1109 fn unlinked_file_with_cfg_off() {
1110 cov_mark::check!(unlinked_file_skip_fix_when_mod_already_exists);
1111 check_no_fix(
1112 r#"
1113//- /main.rs
1114#[cfg(never)]
1115mod foo;
1116
1117//- /foo.rs
1118$0
1119"#,
1120 );
1121 }
1122
1123 #[test]
1124 fn unlinked_file_with_cfg_on() {
1125 check_no_diagnostics(
1126 r#"
1127//- /main.rs
1128#[cfg(not(never))]
1129mod foo;
1130
1131//- /foo.rs
1132"#,
1133 );
1134 }
978} 1135}
diff --git a/crates/ide/src/diagnostics/unlinked_file.rs b/crates/ide/src/diagnostics/unlinked_file.rs
new file mode 100644
index 000000000..c5741bf6b
--- /dev/null
+++ b/crates/ide/src/diagnostics/unlinked_file.rs
@@ -0,0 +1,156 @@
1//! Diagnostic emitted for files that aren't part of any crate.
2
3use hir::{
4 db::DefDatabase,
5 diagnostics::{Diagnostic, DiagnosticCode},
6 InFile,
7};
8use ide_db::{
9 base_db::{FileId, FileLoader, SourceDatabase, SourceDatabaseExt},
10 source_change::SourceChange,
11 RootDatabase,
12};
13use syntax::{
14 ast::{self, ModuleItemOwner, NameOwner},
15 AstNode, SyntaxNodePtr,
16};
17use text_edit::TextEdit;
18
19use crate::Fix;
20
21use super::fixes::DiagnosticWithFix;
22
23#[derive(Debug)]
24pub(crate) struct UnlinkedFile {
25 pub(crate) file_id: FileId,
26 pub(crate) node: SyntaxNodePtr,
27}
28
29impl Diagnostic for UnlinkedFile {
30 fn code(&self) -> DiagnosticCode {
31 DiagnosticCode("unlinked-file")
32 }
33
34 fn message(&self) -> String {
35 "file not included in module tree".to_string()
36 }
37
38 fn display_source(&self) -> InFile<SyntaxNodePtr> {
39 InFile::new(self.file_id.into(), self.node.clone())
40 }
41
42 fn as_any(&self) -> &(dyn std::any::Any + Send + 'static) {
43 self
44 }
45}
46
47impl DiagnosticWithFix for UnlinkedFile {
48 fn fix(&self, sema: &hir::Semantics<RootDatabase>) -> Option<Fix> {
49 // If there's an existing module that could add a `mod` item to include the unlinked file,
50 // suggest that as a fix.
51
52 let source_root = sema.db.source_root(sema.db.file_source_root(self.file_id));
53 let our_path = source_root.path_for_file(&self.file_id)?;
54 let module_name = our_path.name_and_extension()?.0;
55
56 // Candidates to look for:
57 // - `mod.rs` in the same folder
58 // - we also check `main.rs` and `lib.rs`
59 // - `$dir.rs` in the parent folder, where `$dir` is the directory containing `self.file_id`
60 let parent = our_path.parent()?;
61 let mut paths =
62 vec![parent.join("mod.rs")?, parent.join("main.rs")?, parent.join("lib.rs")?];
63
64 // `submod/bla.rs` -> `submod.rs`
65 if let Some(newmod) = (|| {
66 let name = parent.name_and_extension()?.0;
67 parent.parent()?.join(&format!("{}.rs", name))
68 })() {
69 paths.push(newmod);
70 }
71
72 for path in &paths {
73 if let Some(parent_id) = source_root.file_for_path(path) {
74 for krate in sema.db.relevant_crates(*parent_id).iter() {
75 let crate_def_map = sema.db.crate_def_map(*krate);
76 for (_, module) in crate_def_map.modules() {
77 if module.origin.is_inline() {
78 // We don't handle inline `mod parent {}`s, they use different paths.
79 continue;
80 }
81
82 if module.origin.file_id() == Some(*parent_id) {
83 return make_fix(sema.db, *parent_id, module_name, self.file_id);
84 }
85 }
86 }
87 }
88 }
89
90 None
91 }
92}
93
94fn make_fix(
95 db: &RootDatabase,
96 parent_file_id: FileId,
97 new_mod_name: &str,
98 added_file_id: FileId,
99) -> Option<Fix> {
100 fn is_outline_mod(item: &ast::Item) -> bool {
101 matches!(item, ast::Item::Module(m) if m.item_list().is_none())
102 }
103
104 let mod_decl = format!("mod {};", new_mod_name);
105 let ast: ast::SourceFile = db.parse(parent_file_id).tree();
106
107 let mut builder = TextEdit::builder();
108
109 // If there's an existing `mod m;` statement matching the new one, don't emit a fix (it's
110 // probably `#[cfg]`d out).
111 for item in ast.items() {
112 if let ast::Item::Module(m) = item {
113 if let Some(name) = m.name() {
114 if m.item_list().is_none() && name.to_string() == new_mod_name {
115 cov_mark::hit!(unlinked_file_skip_fix_when_mod_already_exists);
116 return None;
117 }
118 }
119 }
120 }
121
122 // If there are existing `mod m;` items, append after them (after the first group of them, rather).
123 match ast
124 .items()
125 .skip_while(|item| !is_outline_mod(item))
126 .take_while(|item| is_outline_mod(item))
127 .last()
128 {
129 Some(last) => {
130 cov_mark::hit!(unlinked_file_append_to_existing_mods);
131 builder.insert(last.syntax().text_range().end(), format!("\n{}", mod_decl));
132 }
133 None => {
134 // Prepend before the first item in the file.
135 match ast.items().next() {
136 Some(item) => {
137 cov_mark::hit!(unlinked_file_prepend_before_first_item);
138 builder.insert(item.syntax().text_range().start(), format!("{}\n\n", mod_decl));
139 }
140 None => {
141 // No items in the file, so just append at the end.
142 cov_mark::hit!(unlinked_file_empty_file);
143 builder.insert(ast.syntax().text_range().end(), format!("{}\n", mod_decl));
144 }
145 }
146 }
147 }
148
149 let edit = builder.finish();
150 let trigger_range = db.parse(added_file_id).tree().syntax().text_range();
151 Some(Fix::new(
152 &format!("Insert `{}`", mod_decl),
153 SourceChange::from_text_edit(parent_file_id, edit),
154 trigger_range,
155 ))
156}