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Read config vars from files
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parent
be1ddb4203
commit
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25
src/util.rs
25
src/util.rs
@ -283,20 +283,37 @@ where
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use std::env;
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pub fn get_env_str_value(key: &str) -> Option<String>
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{
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let key_file = format!("{}_FILE", key);
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let value_from_env = env::var(key);
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let value_file = env::var(&key_file);
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match (value_from_env, value_file) {
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(Ok(_), Ok(_)) => panic!("You should not define both {} and {}!", key, key_file),
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(Ok(v_env), Err(_)) => Some(v_env),
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(Err(_), Ok(v_file)) => match fs::read_to_string(v_file) {
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Ok(content) => Some(content.trim().to_string()),
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Err(e) => panic!("Failed to load {}: {:?}", key, e)
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},
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_ => None
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}
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}
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pub fn get_env<V>(key: &str) -> Option<V>
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where
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V: FromStr,
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{
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try_parse_string(env::var(key).ok())
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try_parse_string(get_env_str_value(key))
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}
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const TRUE_VALUES: &[&str] = &["true", "t", "yes", "y", "1"];
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const FALSE_VALUES: &[&str] = &["false", "f", "no", "n", "0"];
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pub fn get_env_bool(key: &str) -> Option<bool> {
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match env::var(key) {
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Ok(val) if TRUE_VALUES.contains(&val.to_lowercase().as_ref()) => Some(true),
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Ok(val) if FALSE_VALUES.contains(&val.to_lowercase().as_ref()) => Some(false),
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match get_env_str_value(key) {
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Some(val) if TRUE_VALUES.contains(&val.to_lowercase().as_ref()) => Some(true),
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Some(val) if FALSE_VALUES.contains(&val.to_lowercase().as_ref()) => Some(false),
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_ => None,
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}
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}
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