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Support MEILI_CONFIG_FILE_PATH to define config file path

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Close #2800

This is an alternative to the `--config-file-path` option. If both `--config-file-path` and `MEILI_CONFIG_FILE_PATH` are present, `--config-file-path` takes precedence according to the "Priority order" section of #2558.
This commit is contained in:
Lawrence Chou 2022-09-27 22:58:25 +08:00
parent 1b72eba1f3
commit 2681e92d4e
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GPG Key ID: 56B65EC9D482438D
1 changed files with 25 additions and 23 deletions
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48
meilisearch-http/src/option.rs
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@ -1,3 +1,4 @@
use std::env;
use std::fs;
use std::io::{BufReader, Read};
use std::path::PathBuf;
@ -51,6 +52,7 @@ const MEILI_LOG_LEVEL: &str = "MEILI_LOG_LEVEL";
#[cfg(feature = "metrics")]
const MEILI_ENABLE_METRICS_ROUTE: &str = "MEILI_ENABLE_METRICS_ROUTE";
const DEFAULT_CONFIG_FILE_PATH: &str = "./config.yml";
const DEFAULT_DB_PATH: &str = "./data.ms";
const DEFAULT_HTTP_ADDR: &str = "127.0.0.1:7700";
const DEFAULT_ENV: &str = "development";
@ -261,33 +263,33 @@ impl Opt {
// Parse the args to get the config_file_path.
let mut opts = Opt::parse();
let mut config_read_from = None;
if let Some(config_file_path) = opts
let config_file_path = opts
.config_file_path
.clone()
.or_else(|| Some(PathBuf::from("./config.toml")))
{
match std::fs::read(&config_file_path) {
Ok(config) => {
// If the file is successfully read, we deserialize it with `toml`.
let opt_from_config = toml::from_slice::<Opt>(&config)?;
// Return an error if config file contains 'config_file_path'
// Using that key in the config file doesn't make sense bc it creates a logical loop (config file referencing itself)
if opt_from_config.config_file_path.is_some() {
anyhow::bail!("`config_file_path` is not supported in config file")
}
// We inject the values from the toml in the corresponding env vars if needs be. Doing so, we respect the priority toml < env vars < cli args.
opt_from_config.export_to_env();
// Once injected we parse the cli args once again to take the new env vars into scope.
opts = Opt::parse();
config_read_from = Some(config_file_path);
.or_else(|| env::var("MEILI_CONFIG_FILE_PATH").map(PathBuf::from).ok())
.unwrap_or_else(|| PathBuf::from(DEFAULT_CONFIG_FILE_PATH));
match std::fs::read(&config_file_path) {
Ok(config) => {
// If the file is successfully read, we deserialize it with `toml`.
let opt_from_config = toml::from_slice::<Opt>(&config)?;
// Return an error if config file contains 'config_file_path'
// Using that key in the config file doesn't make sense bc it creates a logical loop (config file referencing itself)
if opt_from_config.config_file_path.is_some() {
anyhow::bail!("`config_file_path` is not supported in config file")
}
// If we have an error while reading the file defined by the user.
Err(_) if opts.config_file_path.is_some() => anyhow::bail!(
"unable to open or read the {:?} configuration file.",
opts.config_file_path.unwrap().display().to_string()
),
_ => (),
// We inject the values from the toml in the corresponding env vars if needs be. Doing so, we respect the priority toml < env vars < cli args.
opt_from_config.export_to_env();
// Once injected we parse the cli args once again to take the new env vars into scope.
opts = Opt::parse();
config_read_from = Some(config_file_path);
}
// If we have an error while reading the file defined by the user.
Err(_) if opts.config_file_path.is_some() => anyhow::bail!(
"unable to open or read the {:?} configuration file.",
opts.config_file_path.unwrap().display().to_string()
),
_ => (),
}
Ok((opts, config_read_from))