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
161
162
163
164
165
166
167

use std::path::Path;

use super::PathSubcommandArguments;
use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::engine::{EngineState, Stack, StateWorkingSet};
use nu_protocol::{
    engine::Command, Category, Example, PipelineData, ShellError, Signature, Span, Spanned,
    SyntaxShape, Type, Value,
};

struct Arguments {
    replace: Option<Spanned<String>>,
}

impl PathSubcommandArguments for Arguments {}

#[derive(Clone)]
pub struct SubCommand;

impl Command for SubCommand {
    fn name(&self) -> &str {
        "path basename"
    }

    fn signature(&self) -> Signature {
        Signature::build("path basename")
            .input_output_types(vec![
                (Type::String, Type::String),
                (
                    Type::List(Box::new(Type::String)),
                    Type::List(Box::new(Type::String)),
                ),
            ])
            .named(
                "replace",
                SyntaxShape::String,
                "Return original path with basename replaced by this string",
                Some('r'),
            )
            .category(Category::Path)
    }

    fn usage(&self) -> &str {
        "Get the final component of a path."
    }

    fn is_const(&self) -> bool {
        true
    }

    fn run(
        &self,
        engine_state: &EngineState,
        stack: &mut Stack,
        call: &Call,
        input: PipelineData,
    ) -> Result<PipelineData, ShellError> {
        let head = call.head;
        let args = Arguments {
            replace: call.get_flag(engine_state, stack, "replace")?,
        };

        // This doesn't match explicit nulls
        if matches!(input, PipelineData::Empty) {
            return Err(ShellError::PipelineEmpty { dst_span: head });
        }
        input.map(
            move |value| super::operate(&get_basename, &args, value, head),
            engine_state.ctrlc.clone(),
        )
    }

    fn run_const(
        &self,
        working_set: &StateWorkingSet,
        call: &Call,
        input: PipelineData,
    ) -> Result<PipelineData, ShellError> {
        let head = call.head;
        let args = Arguments {
            replace: call.get_flag_const(working_set, "replace")?,
        };

        // This doesn't match explicit nulls
        if matches!(input, PipelineData::Empty) {
            return Err(ShellError::PipelineEmpty { dst_span: head });
        }
        input.map(
            move |value| super::operate(&get_basename, &args, value, head),
            working_set.permanent().ctrlc.clone(),
        )
    }

    #[cfg(windows)]
    fn examples(&self) -> Vec<Example> {
        vec![
            Example {
                description: "Get basename of a path",
                example: "'C:\\Users\\joe\\test.txt' | path basename",
                result: Some(Value::test_string("test.txt")),
            },
            Example {
                description: "Get basename of a list of paths",
                example: r"[ C:\Users\joe, C:\Users\doe ] | path basename",
                result: Some(Value::test_list(vec![
                    Value::test_string("joe"),
                    Value::test_string("doe"),
                ])),
            },
            Example {
                description: "Replace basename of a path",
                example: "'C:\\Users\\joe\\test.txt' | path basename --replace 'spam.png'",
                result: Some(Value::test_string("C:\\Users\\joe\\spam.png")),
            },
        ]
    }

    #[cfg(not(windows))]
    fn examples(&self) -> Vec<Example> {
        vec![
            Example {
                description: "Get basename of a path",
                example: "'/home/joe/test.txt' | path basename",
                result: Some(Value::test_string("test.txt")),
            },
            Example {
                description: "Get basename of a list of paths",
                example: "[ /home/joe, /home/doe ] | path basename",
                result: Some(Value::test_list(vec![
                    Value::test_string("joe"),
                    Value::test_string("doe"),
                ])),
            },
            Example {
                description: "Replace basename of a path",
                example: "'/home/joe/test.txt' | path basename --replace 'spam.png'",
                result: Some(Value::test_string("/home/joe/spam.png")),
            },
        ]
    }
}

fn get_basename(path: &Path, span: Span, args: &Arguments) -> Value {
    match &args.replace {
        Some(r) => Value::string(path.with_file_name(r.item.clone()).to_string_lossy(), span),
        None => Value::string(
            match path.file_name() {
                Some(n) => n.to_string_lossy(),
                None => "".into(),
            },
            span,
        ),
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_examples() {
        use crate::test_examples;

        test_examples(SubCommand {})
    }
}