Function substitute_env_vars

crates/opencode-config/src/loader.rs:397–404

Substitute `{env:VAR}` patterns with environment variable values. Works on the raw JSONC text before parsing.

(text: &str)

/// Substitute `{env:VAR}` patterns with environment variable values.
/// Works on the raw JSONC text before parsing.
fn substitute_env_vars(text: &str) -> String {
    let re = regex::Regex::new(r"\{env:([^}]+)\}").unwrap();
    re.replace_all(text, |caps: &regex::Captures| {
        let var_name = &caps[1];
        std::env::var(var_name).unwrap_or_default()
    })
    .to_string()
}

/// Resolve `{file:path}` patterns by reading file contents.
/// Skips patterns on commented lines. Resolves relative paths from `base_dir`.