55 lines
1.4 KiB
Rust
55 lines
1.4 KiB
Rust
use std::{
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fmt::Debug,
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fs::File,
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io::Read,
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path::Path,
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};
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use serde::de::DeserializeOwned;
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pub const CONFIG_PERMISSIONS_MODE: u32 = 33152;
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fn load_inner <
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T: DeserializeOwned
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> (
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mut f: File
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) -> T {
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let mut buffer = vec! [0u8; 4096];
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let bytes_read = f.read (&mut buffer).unwrap_or_else (|_| panic! ("Can't read config"));
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buffer.truncate (bytes_read);
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let config_s = String::from_utf8 (buffer).unwrap_or_else (|_| panic! ("Can't parse config as UTF-8"));
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toml::from_str (&config_s).unwrap_or_else (|e| panic! ("Can't parse config as TOML: {}", e))
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}
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/// For files that contain public-viewable information
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pub fn load_public <
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T: DeserializeOwned,
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P: AsRef <Path> + Debug
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> (
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config_file_path: P
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) -> T {
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let mut f = File::open (&config_file_path).unwrap_or_else (|_| panic! ("Can't open {:?}", config_file_path));
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load_inner (f)
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}
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/// For files that may contain secrets and should have permissions or other
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/// safeties checked
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pub fn load <
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T: DeserializeOwned,
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P: AsRef <Path> + Debug
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> (
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config_file_path: P
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) -> T {
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use std::os::unix::fs::PermissionsExt;
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let mut f = File::open (&config_file_path).unwrap_or_else (|_| panic! ("Can't open {:?}", config_file_path));
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let mode = f.metadata ().unwrap ().permissions ().mode ();
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assert_eq! (mode, CONFIG_PERMISSIONS_MODE, "Config file has bad permissions mode, it should be octal 0600");
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load_inner (f)
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}
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