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

use std::{io::prelude::*, path::PathBuf};

use config::{Config, Environment, File as ConfigFile, FileFormat};
use eyre::{bail, eyre, Context, Result};
use fs_err::{create_dir_all, File};
use serde::{de::DeserializeOwned, Deserialize, Serialize};

static EXAMPLE_CONFIG: &str = include_str!("../server.toml");

#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct Metrics {
    pub enable: bool,
    pub host: String,
    pub port: u16,
}

impl Default for Metrics {
    fn default() -> Self {
        Self {
            enable: false,
            host: String::from("127.0.0.1"),
            port: 9001,
        }
    }
}

#[derive(Clone, Debug, Deserialize, Serialize)]
pub struct Settings<DbSettings> {
    pub host: String,
    pub port: u16,
    pub path: String,
    pub open_registration: bool,
    pub max_history_length: usize,
    pub max_record_size: usize,
    pub page_size: i64,
    pub register_webhook_url: Option<String>,
    pub register_webhook_username: String,
    pub metrics: Metrics,
    pub tls: Tls,

    #[serde(flatten)]
    pub db_settings: DbSettings,
}

impl<DbSettings: DeserializeOwned> Settings<DbSettings> {
    pub fn new() -> Result<Self> {
        let mut config_file = if let Ok(p) = std::env::var("ATUIN_CONFIG_DIR") {
            PathBuf::from(p)
        } else {
            let mut config_file = PathBuf::new();
            let config_dir = atuin_common::utils::config_dir();
            config_file.push(config_dir);
            config_file
        };

        config_file.push("server.toml");

        // create the config file if it does not exist
        let mut config_builder = Config::builder()
            .set_default("host", "127.0.0.1")?
            .set_default("port", 8888)?
            .set_default("open_registration", false)?
            .set_default("max_history_length", 8192)?
            .set_default("max_record_size", 1024 * 1024 * 1024)? // pretty chonky
            .set_default("path", "")?
            .set_default("register_webhook_username", "")?
            .set_default("page_size", 1100)?
            .set_default("metrics.enable", false)?
            .set_default("metrics.host", "127.0.0.1")?
            .set_default("metrics.port", 9001)?
            .set_default("tls.enable", false)?
            .set_default("tls.cert_path", "")?
            .set_default("tls.key_path", "")?
            .add_source(
                Environment::with_prefix("atuin")
                    .prefix_separator("_")
                    .separator("__"),
            );

        config_builder = if config_file.exists() {
            config_builder.add_source(ConfigFile::new(
                config_file.to_str().unwrap(),
                FileFormat::Toml,
            ))
        } else {
            create_dir_all(config_file.parent().unwrap())?;
            let mut file = File::create(config_file)?;
            file.write_all(EXAMPLE_CONFIG.as_bytes())?;

            config_builder
        };

        let config = config_builder.build()?;

        config
            .try_deserialize()
            .map_err(|e| eyre!("failed to deserialize: {}", e))
    }
}

pub fn example_config() -> &'static str {
    EXAMPLE_CONFIG
}

#[derive(Clone, Debug, Default, Deserialize, Serialize)]
pub struct Tls {
    pub enable: bool,
    pub cert_path: PathBuf,
    pub pkey_path: PathBuf,
}

impl Tls {
    pub fn certificates(&self) -> Result<Vec<rustls::Certificate>> {
        let cert_file = std::fs::File::open(&self.cert_path)
            .with_context(|| format!("tls.cert_path {:?} is missing", self.cert_path))?;
        let mut reader = std::io::BufReader::new(cert_file);
        let certs: Vec<_> = rustls_pemfile::certs(&mut reader)
            .with_context(|| format!("tls.cert_path {:?} is invalid", self.cert_path))?
            .into_iter()
            .map(rustls::Certificate)
            .collect();

        if certs.is_empty() {
            bail!(
                "tls.cert_path {:?} must have at least one certificate",
                self.cert_path
            );
        }

        Ok(certs)
    }

    pub fn private_key(&self) -> Result<rustls::PrivateKey> {
        let pkey_file = std::fs::File::open(&self.pkey_path)
            .with_context(|| format!("tls.pkey_path {:?} is missing", self.pkey_path))?;
        let mut reader = std::io::BufReader::new(pkey_file);
        let keys = rustls_pemfile::pkcs8_private_keys(&mut reader)
            .with_context(|| format!("tls.pkey_path {:?} is not PKCS8-encoded", self.pkey_path))?;

        if keys.is_empty() {
            bail!(
                "tls.pkey_path {:?} must have at least one private key",
                self.pkey_path
            );
        }

        let key = rustls::PrivateKey(keys[0].clone());

        Ok(key)
    }
}