fetter 3.4.0

System-wide Python package discovery, validation, vulnerability scanning, and allow-listing.
Documentation 
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

// Simple glob-like matching, supporting * and ? wildcards. Inputs are char iterators.
pub(crate) fn match_str(pattern: &str, input: &str, case_insensitive: bool) -> bool {
    let mut p_chars = pattern.chars();
    let mut i_chars = input.chars();

    while let Some(p_char) = p_chars.next() {
        let p_char = if case_insensitive {
            p_char.to_ascii_lowercase()
        } else {
            p_char
        };
        match p_char {
            '*' => {
                // consume all contiguous '*', return if pattern ends with '*'
                loop {
                    match p_chars.clone().peekable().peek() {
                        Some(&p_char_next) => {
                            if p_char_next != '*' {
                                break;
                            }
                            p_chars.next();
                        }
                        None => {
                            return true;
                        }
                    }
                }
                let p_str = p_chars.as_str();
                let i_str = i_chars.as_str();

                // match zero characters or more characters in the i_str
                for i in 0..i_str.len() {
                    if match_str(p_str, &i_str[i..], case_insensitive) {
                        return true;
                    }
                }
                return false;
            }
            '?' => {
                if i_chars.next().is_none() {
                    return false;
                }
            }
            '-' | '_' => match i_chars.next() {
                Some(i_char) if i_char == '-' || i_char == '_' => continue,
                _ => return false,
            },
            _ => {
                let i_char = match i_chars.next() {
                    Some(c) if case_insensitive => c.to_ascii_lowercase(),
                    Some(c) => c,
                    None => return false,
                };
                if p_char != i_char {
                    return false;
                }
            }
        }
    }
    i_chars.next().is_none()
}

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

    #[test]
    fn test_match_a() {
        assert!(match_str("he?lo", "hello", false));
        assert!(match_str("*world", "hello world", false));
        assert!(match_str("he*o", "hello", false));
        assert!(match_str("he*o", "heo", false));
        assert!(match_str("he*o", "heasdfasdfero", false));

        assert!(!match_str("h?llo", "hella", false));
        assert!(!match_str("hell*o", "hellaaaaa", false));
    }

    #[test]
    fn test_match_b() {
        assert!(match_str("He?lo", "hello", true));
        assert!(match_str("he*O", "heLLo", true));

        assert!(!match_str("He*O", "hello", false));
    }

    #[test]
    fn test_match_c() {
        assert!(match_str("*", "anything", false));
        assert!(match_str("h*o", "hello", false));
        assert!(match_str("h?llo*", "hello world", false));
        assert!(match_str("he*l?d*", "he_______l?dworlt", false));

        assert!(!match_str("he*l?d", "hello worlt", false));
    }

    #[test]
    fn test_match_d() {
        assert!(match_str("he_lo", "he-lo", false));
        assert!(match_str("he-lo", "he_lo", false));
        assert!(match_str("he*-world", "heLLo_world", false));
        assert!(match_str("he*-wor?d", "heLLo_worxd", false));
        assert!(match_str("he*-wor*", "heLLo_worxd", false));

        assert!(!match_str("he*-wor*q", "heLLo_worxd", false));
    }

    #[test]
    fn test_match_e() {
        assert!(match_str("H*o w*d", "hello world", true));
        assert!(match_str("H*o  w*d", "hello  world", true));

        assert!(!match_str("H*o w*d", "hello  world", true));
    }

    #[test]
    fn test_match_f() {
        assert!(match_str("???", "hld", true));
        assert!(match_str("???*", "hld", true));
        assert!(match_str("???*", "hldfoooo", true));
        assert!(match_str("???*.png", "hldfoooo.png", true));

        assert!(!match_str("???", "ld", true));
        assert!(!match_str("???*.png", "hldfoooo.pn", true));
        assert!(!match_str("???.png", "o.png", true));
    }

    #[test]
    fn test_match_g() {
        assert!(!match_str("???*.png", "x.png", true));
    }

    #[test]
    fn test_match_h() {
        assert!(match_str("-_-_??*.png", "----oo.png", true));
        assert!(match_str("-_-_??*.png", "____oo.png", true));
        assert!(match_str("-_-_??*.png", "____ooXXX.png", true));

        assert!(!match_str("-_-_??*.png", "____o.png", true));
        assert!(!match_str("-_-_??.png", "____ooo.png", true));
    }
}