keyflux 0.1.11

A CLI tool and library for synchronizing environment secrets across multiple platforms including local files, GitHub Secrets, Supabase Vault, and Vercel Secrets. It facilitates secure management and automation of sensitive data.
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use regex::{Regex, escape};
use std::fmt::{self, Display, Formatter};

pub trait VariableInterpolation {
    fn shell_var_to_capturing_regex(&self) -> Regex;
    fn template_to_capturing_regex(&self) -> Regex;
    fn regex_to_shell_var(regex: &Regex) -> String;
    fn regex_to_template(regex: &Regex) -> String;
}

impl VariableInterpolation for String {
    /// Converts a shell variable string like `${VAR}` into a regex with a named capturing group.
    fn shell_var_to_capturing_regex(&self) -> Regex {
        let clean_var = self.trim_matches(|c: char| c == '$' || c == '{' || c == '}');
        Regex::new(&format!(r"(?P<{}>.*)", escape(clean_var))).unwrap()
    }

    /// Converts a template variable string like `{{var}}` into a regex with a named capturing group.
    fn template_to_capturing_regex(&self) -> Regex {
        let clean_template = self.trim_matches(|c: char| c == '{' || c == '}');
        Regex::new(&format!(r"(?P<{}>.*)", escape(clean_template))).unwrap()
    }

    /// Extracts the shell variable name from a regex pattern and returns it in the format `${var}`.
    fn regex_to_shell_var(regex: &Regex) -> String {
        let pattern = regex.as_str();
        let var_name = pattern.trim_start_matches(r"(?P<").trim_end_matches(r">.*)");
        format!("${{{}}}", var_name)
    }

    /// Extracts the template variable name from a regex pattern and returns it in the format `{{var}}`.
    fn regex_to_template(regex: &Regex) -> String {
        let pattern = regex.as_str();
        let placeholder_name = pattern.trim_start_matches(r"(?P<").trim_end_matches(r">.*)");
        format!("{{{{{}}}}}", placeholder_name)
    }
}