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 import_cycle(path: &[String]) -> LisetteDiagnostic {
48    let modules: Vec<_> = path[..path.len() - 1].to_vec();
49
50    let is_self_import = modules.len() == 1;
51
52    let chain = if is_self_import {
53        format!("{} -> {}", modules[0], modules[0])
54    } else {
55        modules.join(" -> ")
56    };
57
58    let first_module = &modules[0];
59    let first_end = first_module.len();
60    let first_center = first_module.len() / 2;
61
62    let last_module = if is_self_import {
63        &modules[0]
64    } else {
65        modules.last().expect("cycle must have at least one module")
66    };
67    let last_start = chain.len() - last_module.len();
68    let last_end = chain.len();
69    let last_center = last_start + last_module.len() / 2;
70
71    let mut underline = String::new();
72    for i in 0..chain.len() {
73        if i < first_end {
74            if i == first_center {
75                underline.push('┬');
76            } else {
77                underline.push('─');
78            }
79        } else if i >= last_start && i < last_end {
80            if i == last_center {
81                underline.push('┬');
82            } else {
83                underline.push('─');
84            }
85        } else {
86            underline.push(' ');
87        }
88    }
89
90    let mut connect_line = String::new();
91    for i in 0..=last_center {
92        if i < first_center {
93            connect_line.push(' ');
94        } else if i == first_center {
95            connect_line.push('╰');
96        } else if i < last_center {
97            connect_line.push('─');
98        } else {
99            connect_line.push('╯');
100        }
101    }
102
103    let art = format!("{}\n{}\n{}", chain, underline, connect_line);
104
105    let help = if is_self_import {
106        "Remove the self-import"
107    } else {
108        "To break the cycle, remove one of imports or extract common dependencies into a separate module"
109    };
110
111    LisetteDiagnostic::error(format!("Import cycle detected\n\n{}", art))
112        .with_resolve_code("import_cycle")
113        .with_help(help)
114}
lisette_diagnostics/module_graph.rs

lisette_diagnostics/
module_graph.rs
