aiward 0.5.19

Local-first AI secret firewall for development environments.
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

use std::{
    fs::{self, File, OpenOptions},
    path::Path,
};

use anyhow::{Context, Result};

pub(crate) fn ensure_parent_dir(path: &Path) -> Result<()> {
    match path
        .parent()
        .filter(|parent| !parent.as_os_str().is_empty())
    {
        Some(parent) => {
            fs::create_dir_all(parent).context(format!("failed to create {}", parent.display()))
        }
        None => Ok(()),
    }
}

pub(crate) fn ensure_private_parent_dir(path: &Path) -> Result<()> {
    match path
        .parent()
        .filter(|parent| !parent.as_os_str().is_empty())
    {
        Some(parent) => ensure_private_dir(parent),
        None => Ok(()),
    }
}

pub(crate) fn ensure_private_dir(path: &Path) -> Result<()> {
    fs::create_dir_all(path).context(format!("failed to create {}", path.display()))?;
    set_private_dir_permissions(path)
}

pub(crate) fn write_private_file(path: &Path, contents: &[u8]) -> Result<()> {
    ensure_private_parent_dir(path)?;
    fs::write(path, contents).context(format!("failed to write {}", path.display()))?;
    set_private_file_permissions(path)
}

pub(crate) fn open_private_append(path: &Path) -> Result<File> {
    ensure_private_parent_dir(path)?;
    let file = OpenOptions::new()
        .create(true)
        .append(true)
        .open(path)
        .context(format!("failed to open {}", path.display()))?;
    set_private_file_permissions(path)?;
    Ok(file)
}

#[cfg(unix)]
pub(crate) fn set_private_dir_permissions(path: &Path) -> Result<()> {
    use std::os::unix::fs::PermissionsExt;

    fs::set_permissions(path, fs::Permissions::from_mode(0o700))
        .context(format!("failed to chmod {}", path.display()))
}

#[cfg(not(unix))]
pub(crate) fn set_private_dir_permissions(_path: &Path) -> Result<()> {
    Ok(())
}

#[cfg(unix)]
pub(crate) fn set_private_file_permissions(path: &Path) -> Result<()> {
    use std::os::unix::fs::PermissionsExt;

    fs::set_permissions(path, fs::Permissions::from_mode(0o600))
        .context(format!("failed to chmod {}", path.display()))
}

#[cfg(not(unix))]
pub(crate) fn set_private_file_permissions(_path: &Path) -> Result<()> {
    Ok(())
}

#[cfg(test)]
mod tests {
    use super::*;
    #[cfg(unix)]
    use std::os::unix::fs::PermissionsExt;

    #[test]
    fn ensure_parent_dir_creates_parent_and_allows_plain_file_name() {
        let tempdir = tempfile::tempdir().unwrap();
        let nested = tempdir.path().join("nested").join("file.txt");

        ensure_parent_dir(&nested).unwrap();
        ensure_parent_dir(Path::new("file.txt")).unwrap();
        ensure_private_parent_dir(Path::new("file.txt")).unwrap();

        assert!(tempdir.path().join("nested").is_dir());
    }

    #[test]
    fn private_file_helpers_write_and_append() {
        let tempdir = tempfile::tempdir().unwrap();
        let path = tempdir.path().join("state").join("file.jsonl");

        write_private_file(&path, b"one\n").unwrap();
        {
            use std::io::Write;
            let mut file = open_private_append(&path).unwrap();
            writeln!(file, "two").unwrap();
        }

        assert_eq!(std::fs::read_to_string(&path).unwrap(), "one\ntwo\n");

        #[cfg(unix)]
        {
            let dir_mode = std::fs::metadata(path.parent().unwrap())
                .unwrap()
                .permissions()
                .mode()
                & 0o777;
            let file_mode = std::fs::metadata(&path).unwrap().permissions().mode() & 0o777;
            assert_eq!(dir_mode, 0o700);
            assert_eq!(file_mode, 0o600);
        }
    }

    #[test]
    fn private_helpers_report_blocked_paths() {
        let tempdir = tempfile::tempdir().unwrap();
        let blocked = tempdir.path().join("blocked");
        std::fs::write(&blocked, "").unwrap();

        assert!(ensure_private_dir(&blocked).is_err());
        assert!(write_private_file(&blocked, b"contents").is_ok());
        assert!(open_private_append(&blocked).is_ok());
    }
}