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 readable string that is safe to store or print without compromising secrets.

variables can be matched with either [[variable_name]] (DoubleBrackets) or {{variable_name}} (DoubleCurlyBrackets).

Usage

```rust let variables: HashMap = [ ("mongousername", "root"), ("mongopassword", "mng233985725"), ] .intoiter() .map(|(k, v)| (k.tostring(), v.to_string())) .collect();

let tofmt = "mongodb://[[mongousername]]:[[mongo_password]]@127.0.0.1:27017";

let (formatted, readable, replacers) = svi::interpolatevariables(tofmt, &variables, svi::Interpolator::DoubleBrackets)?;

println!("{formatted}"); // prints 'mongodb://root:mng233985725@127.0.0.1:27017' println!("{readable}"); // prints 'mongodb://:@127.0.0.1:27017'

// can then make any output involving these replaced variables safe to print / store let tofmt = "got 'mongodb://root:mng233985725@127.0.0.1:27017'"; let readable = svi::replaceinstring(tofmt, &replacers);

println!("{readable}"); // prints: got 'mongodb://:@127.0.0.1:27017' ```

Escaping Interpolation

```rust let variables = HashMap::new();

let to_fmt = "the interpolator will escape interpolation with 3 openers: [[[not a variable]]]";

let (formatted, ) = svi::interpolatevariables(to_fmt, &variables, svi::Interpolator::DoubleBrackets)?;

println!("{formatted}"); // prints 'the interpolator will escape interpolation with 3 openers: [[not a variable]]' ```