5 releases (2 stable)
1.0.1 | May 18, 2024 |
---|---|
0.1.4 | Mar 12, 2023 |
#672 in Algorithms
110 downloads per month
8KB
83 lines
SVI
string variable interpolator
this crate contains a function that interpolates variables in a hashmap into an input string, producing both the resulting string, plus a vec of 'replacers' to make output safe to store or print without compromising secrets.
variables can be matched with either [[variable_name]]
(DoubleBrackets) or {{variable_name}}
(DoubleCurlyBrackets).
Usage
let variables: HashMap<String, String> = [
("mongo_username", "root"),
("mongo_password", "mng233985725"),
]
.into_iter()
.map(|(k, v)| (k.to_string(), v.to_string()))
.collect();
let to_fmt = "mongodb://[[mongo_username]]:[[mongo_password]]@127.0.0.1:27017";
let (formatted, replacers) = svi::interpolate_variables(to_fmt, &variables, svi::Interpolator::DoubleBrackets)?;
println!("{formatted}"); // prints 'mongodb://root:mng233985725@127.0.0.1:27017'
// makes output involving replaced variables safe to print / store
let readable = svi::replace_in_string(&formatted, &replacers);
println!("{readable}"); // prints 'mongodb://<mongo_username>:<mongo_password>@127.0.0.1:27017'
Escaping Interpolation
let variables = HashMap::new();
let to_fmt = "the interpolator will escape interpolation with 3 openers: [[[not a variable]]]";
let (formatted, _) = svi::interpolate_variables(to_fmt, &variables, svi::Interpolator::DoubleBrackets)?;
println!("{formatted}"); // prints 'the interpolator will escape interpolation with 3 openers: [[not a variable]]'
Dependencies
~275–740KB
~17K SLoC