use hir::{db::ExpandDatabase, HirFileIdExt};
use ide_db::{assists::Assist, base_db::AnchoredPathBuf, source_change::FileSystemEdit};
use itertools::Itertools;
use syntax::AstNode;
use crate::{fix, Diagnostic, DiagnosticCode, DiagnosticsContext};
// Diagnostic: unresolved-module
//
// This diagnostic is triggered if rust-analyzer is unable to discover referred module.
pub(crate) fn unresolved_module(
ctx: &DiagnosticsContext<'_>,
d: &hir::UnresolvedModule,
) -> Diagnostic {
Diagnostic::new_with_syntax_node_ptr(
ctx,
DiagnosticCode::RustcHardError("E0583"),
match &*d.candidates {
[] => "unresolved module".to_string(),
[candidate] => format!("unresolved module, can't find module file: {candidate}"),
[candidates @ .., last] => {
format!(
"unresolved module, can't find module file: {}, or {}",
candidates.iter().format(", "),
last
)
}
},
d.decl.clone().map(|it| it.into()),
)
.with_fixes(fixes(ctx, d))
}
fn fixes(ctx: &DiagnosticsContext<'_>, d: &hir::UnresolvedModule) -> Option<Vec<Assist>> {
let root = ctx.sema.db.parse_or_expand(d.decl.file_id);
let unresolved_module = d.decl.value.to_node(&root);
Some(
d.candidates
.iter()
.map(|candidate| {
fix(
"create_module",
&format!("Create module at `{candidate}`"),
FileSystemEdit::CreateFile {
dst: AnchoredPathBuf {
anchor: d.decl.file_id.original_file(ctx.sema.db),
path: candidate.clone(),
},
initial_contents: "".to_string(),
}
.into(),
unresolved_module.syntax().text_range(),
)
})
.collect(),
)
}
#[cfg(test)]
mod tests {
use expect_test::expect;
use crate::tests::{check_diagnostics, check_expect};
#[test]
fn unresolved_module() {
check_diagnostics(
r#"
//- /lib.rs
mod foo;
mod bar;
//^^^^^^^^ 💡 error: unresolved module, can't find module file: bar.rs, or bar/mod.rs
mod baz {}
//- /foo.rs
"#,
);
}
#[test]
fn test_unresolved_module_diagnostic() {
check_expect(
r#"mod foo;"#,
expect![[r#"
[
Diagnostic {
code: RustcHardError(
"E0583",
),
message: "unresolved module, can't find module file: foo.rs, or foo/mod.rs",
range: FileRange {
file_id: FileId(
0,
),
range: 0..8,
},
severity: Error,
unused: false,
experimental: false,
fixes: Some(
[
Assist {
id: AssistId(
"create_module",
QuickFix,
),
label: "Create module at `foo.rs`",
group: None,
target: 0..8,
source_change: Some(
SourceChange {
source_file_edits: {},
file_system_edits: [
CreateFile {
dst: AnchoredPathBuf {
anchor: FileId(
0,
),
path: "foo.rs",
},
initial_contents: "",
},
],
is_snippet: false,
},
),
trigger_signature_help: false,
},
Assist {
id: AssistId(
"create_module",
QuickFix,
),
label: "Create module at `foo/mod.rs`",
group: None,
target: 0..8,
source_change: Some(
SourceChange {
source_file_edits: {},
file_system_edits: [
CreateFile {
dst: AnchoredPathBuf {
anchor: FileId(
0,
),
path: "foo/mod.rs",
},
initial_contents: "",
},
],
is_snippet: false,
},
),
trigger_signature_help: false,
},
],
),
main_node: Some(
InFileWrapper {
file_id: FileId(
0,
),
value: [email protected]
[email protected] "mod"
[email protected] " "
[email protected]
[email protected] "foo"
[email protected] ";"
,
},
),
},
]
"#]],
);
}
}