lisette_diagnostics/
module_graph.rs

1use crate::LisetteDiagnostic;
2use syntax::ast::Span;
3
4pub fn module_not_found(
5    module_name: &str,
6    span: Span,
7    is_go_stdlib: bool,
8    standalone: bool,
9    src_prefix_hint: Option<String>,
10) -> LisetteDiagnostic {
11    let help = if let Some(stripped) = src_prefix_hint {
12        format!(
13            "Did you mean `import \"{}\"`? The `src/` prefix is not needed — imports are relative to the source directory.",
14            stripped
15        )
16    } else if is_go_stdlib {
17        format!(
18            "No `{}` module found in your local project. Did you mean `import \"go:{}\"` from Go's stdlib?",
19            module_name, module_name
20        )
21    } else if standalone {
22        "When executing `lis run` on an individual file, that file may import only from the Go standard library. To import modules normally, use `lis new` to create a project."
23            .to_string()
24    } else {
25        "Check the module path and ensure the file exists".to_string()
26    };
27
28    LisetteDiagnostic::error("Module not found")
29        .with_resolve_code("module_not_found")
30        .with_span_label(&span, "not found")
31        .with_help(help)
32}
33
34pub fn cannot_import_prelude(span: Span) -> LisetteDiagnostic {
35    LisetteDiagnostic::error("Invalid import")
36        .with_resolve_code("cannot_import_prelude")
37        .with_span_label(&span, "prelude is automatically available")
38        .with_help("Remove this import. Use e.g. `Option` or `prelude.Option` directly.")
39}
40
41pub fn test_file_not_supported(filename: &str) -> LisetteDiagnostic {
42    LisetteDiagnostic::error(format!("Test file `{}` is not yet supported", filename))
43        .with_resolve_code("test_file_not_supported")
44        .with_help("Files ending in `_test.lis` are reserved for future testing support. Rename this file to compile it.")
45}
46
47pub fn undeclared_go_import(go_pkg: &str, span: Span) -> LisetteDiagnostic {
48    LisetteDiagnostic::error("Undeclared Go dependency")
49        .with_resolve_code("undeclared_go_import")
50        .with_span_label(&span, "not in lisette.toml")
51        .with_help(format!(
52            "Run `lis add {}` to add this dependency, or add it manually to `[dependencies.go]` in `lisette.toml`",
53            go_pkg
54        ))
55}
56
57pub fn missing_go_typedef(
58    go_pkg: &str,
59    module: &str,
60    version: &str,
61    span: Span,
62) -> LisetteDiagnostic {
63    LisetteDiagnostic::error("Missing Go typedef")
64        .with_resolve_code("missing_go_typedef")
65        .with_span_label(&span, "no .d.lis file found")
66        .with_help(format!(
67            "Package `{}` is declared via `{}` {} but no typedef was found. Run `lis sync` to generate it.",
68            go_pkg, module, version
69        ))
70}
71
72pub fn unreadable_go_typedef(path: &std::path::Path, error: &str, span: Span) -> LisetteDiagnostic {
73    LisetteDiagnostic::error("Failed to read Go typedef")
74        .with_resolve_code("unreadable_go_typedef")
75        .with_span_label(&span, "typedef exists but could not be read")
76        .with_help(format!("Failed to read `{}`: {}", path.display(), error,))
77}
78
79pub fn import_cycle(path: &[String]) -> LisetteDiagnostic {
80    let modules: Vec<_> = path[..path.len() - 1].to_vec();
81
82    let is_self_import = modules.len() == 1;
83
84    let chain = if is_self_import {
85        format!("{} -> {}", modules[0], modules[0])
86    } else {
87        modules.join(" -> ")
88    };
89
90    let first_module = &modules[0];
91    let first_end = first_module.len();
92    let first_center = first_module.len() / 2;
93
94    let last_module = if is_self_import {
95        &modules[0]
96    } else {
97        modules.last().expect("cycle must have at least one module")
98    };
99    let last_start = chain.len() - last_module.len();
100    let last_end = chain.len();
101    let last_center = last_start + last_module.len() / 2;
102
103    let mut underline = String::new();
104    for i in 0..chain.len() {
105        if i < first_end {
106            if i == first_center {
107                underline.push('┬');
108            } else {
109                underline.push('─');
110            }
111        } else if i >= last_start && i < last_end {
112            if i == last_center {
113                underline.push('┬');
114            } else {
115                underline.push('─');
116            }
117        } else {
118            underline.push(' ');
119        }
120    }
121
122    let mut connect_line = String::new();
123    for i in 0..=last_center {
124        if i < first_center {
125            connect_line.push(' ');
126        } else if i == first_center {
127            connect_line.push('╰');
128        } else if i < last_center {
129            connect_line.push('─');
130        } else {
131            connect_line.push('╯');
132        }
133    }
134
135    let art = format!("{}\n{}\n{}", chain, underline, connect_line);
136
137    let help = if is_self_import {
138        "Remove the self-import"
139    } else {
140        "To break the cycle, remove one of imports or extract common dependencies into a separate module"
141    };
142
143    LisetteDiagnostic::error(format!("Import cycle detected\n\n{}", art))
144        .with_resolve_code("import_cycle")
145        .with_help(help)
146}
lisette_diagnostics/module_graph.rs

lisette_diagnostics/
module_graph.rs
