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

use std::{fs, io, path::PathBuf};
#[derive(Clone, Debug)]
/// Wrapper around [`std::fs::OpenOptions`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html)
pub struct OpenOptions(fs::OpenOptions);

impl OpenOptions {
    /// Creates a blank new set of options ready for configuration.
    ///
    /// Wrapper for [`std::fs::OpenOptions::new`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.new)
    #[allow(clippy::new_without_default)]
    pub fn new() -> Self {
        OpenOptions(fs::OpenOptions::new())
    }

    /// Sets the option for read access.
    ///
    /// Wrapper for [`std::fs::OpenOptions::read`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.read)
    pub fn read(&mut self, read: bool) -> &mut Self {
        self.0.read(read);
        self
    }

    /// Sets the option for write access.
    ///
    /// Wrapper for [`std::fs::OpenOptions::write`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.write)
    pub fn write(&mut self, write: bool) -> &mut Self {
        self.0.write(write);
        self
    }

    /// Sets the option for the append mode.
    ///
    /// Wrapper for [`std::fs::OpenOptions::append`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.append)
    pub fn append(&mut self, append: bool) -> &mut Self {
        self.0.append(append);
        self
    }

    /// Sets the option for truncating a previous file.
    ///
    /// Wrapper for [`std::fs::OpenOptions::truncate`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.truncate)
    pub fn truncate(&mut self, truncate: bool) -> &mut Self {
        self.0.truncate(truncate);
        self
    }

    /// Sets the option to create a new file, or open it if it already exists.
    ///
    /// Wrapper for [`std::fs::OpenOptions::create`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.create)
    pub fn create(&mut self, create: bool) -> &mut Self {
        self.0.create(create);
        self
    }

    /// Sets the option to create a new file, failing if it already exists.
    ///
    /// Wrapper for [`std::fs::OpenOptions::create_new`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.create_new)
    pub fn create_new(&mut self, create_new: bool) -> &mut Self {
        self.0.create_new(create_new);
        self
    }

    /// Opens a file at `path` with the options specified by `self`.
    ///
    /// Wrapper for [`std::fs::OpenOptions::open`](https://doc.rust-lang.org/std/fs/struct.OpenOptions.html#method.open)
    pub fn open<P>(&self, path: P) -> io::Result<crate::File>
    where
        P: Into<PathBuf>,
    {
        // We have to either duplicate the logic or call the deprecated method here.
        // We can't let the deprecated function call this method, because we can't construct
        // `&fs_err::OpenOptions` from `&fs::OpenOptions` without cloning
        // (although cloning would probably be cheap).
        #[allow(deprecated)]
        crate::File::from_options(path.into(), self.options())
    }
}

/// Methods added by fs-err that are not available on
/// [`std::fs::OpenOptions`](https://doc.rust-lang.org/stable/std/fs/struct.OpenOptions.html).
impl OpenOptions {
    /// Constructs `Self` from [`std::fs::OpenOptions`](https://doc.rust-lang.org/stable/std/fs/struct.OpenOptions.html)
    pub fn from_options(options: fs::OpenOptions) -> Self {
        Self(options)
    }

    /// Returns a reference to the underlying [`std::fs::OpenOptions`](https://doc.rust-lang.org/stable/std/fs/struct.OpenOptions.html).
    ///
    /// Note that calling `open()` on this reference will NOT give you the improved errors from fs-err.
    pub fn options(&self) -> &fs::OpenOptions {
        &self.0
    }

    /// Returns a mutable reference to the underlying [`std::fs::OpenOptions`](https://doc.rust-lang.org/stable/std/fs/struct.OpenOptions.html).
    ///
    /// This allows you to change settings that don't yet have wrappers in fs-err.
    /// Note that calling `open()` on this reference will NOT give you the improved errors from fs-err.
    pub fn options_mut(&mut self) -> &mut fs::OpenOptions {
        &mut self.0
    }
}

#[cfg(unix)]
mod unix {
    use crate::os::unix::fs::OpenOptionsExt;
    use std::os::unix::fs::OpenOptionsExt as _;
    impl OpenOptionsExt for crate::OpenOptions {
        fn mode(&mut self, mode: u32) -> &mut Self {
            self.options_mut().mode(mode);
            self
        }

        fn custom_flags(&mut self, flags: i32) -> &mut Self {
            self.options_mut().custom_flags(flags);
            self
        }
    }
}

#[cfg(windows)]
mod windows {
    use crate::os::windows::fs::OpenOptionsExt;
    use std::os::windows::fs::OpenOptionsExt as _;

    impl OpenOptionsExt for crate::OpenOptions {
        fn access_mode(&mut self, access: u32) -> &mut Self {
            self.options_mut().access_mode(access);
            self
        }

        fn share_mode(&mut self, val: u32) -> &mut Self {
            self.options_mut().share_mode(val);
            self
        }
        fn custom_flags(&mut self, flags: u32) -> &mut Self {
            self.options_mut().custom_flags(flags);
            self
        }

        fn attributes(&mut self, val: u32) -> &mut Self {
            self.options_mut().attributes(val);
            self
        }

        fn security_qos_flags(&mut self, flags: u32) -> &mut Self {
            self.options_mut().security_qos_flags(flags);
            self
        }
    }
}