compare-changes 0.10.3

Reimplementation of GitHub file paths pattern matcher
Documentation 
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use serde_json::Value;
use std::fs;
use std::path::Path;

pub fn get_paths(wildcard: &Path) -> Result<Vec<String>, String> {
    let wildcard_contents = fs::read_to_string(wildcard).map_err(|e| format!("Failed to read wildcard file '{}': {}", wildcard.display(), e))?;
    let yaml: Value = serde_saphyr::from_str(&wildcard_contents).map_err(|e| format!("Failed to parse YAML in '{}': {}", wildcard.display(), e))?;

    let paths = yaml
        .get("on")
        .and_then(|on| on.get("push"))
        .and_then(|push| push.get("paths"))
        .and_then(|paths| paths.as_array())
        .map(|seq| seq.iter().filter_map(|v| v.as_str().map(|s| s.to_string())).collect::<Vec<String>>())
        .unwrap_or_default();

    if paths.is_empty() {
        Err(format!("No on.push.paths found in '{}'", wildcard.display()))
    } else {
        Ok(paths)
    }
}

pub fn get_files(changes: &str) -> Result<Vec<String>, String> {
    serde_json::from_str::<Vec<String>>(changes).map_err(|e| format!("Failed to parse changes JSON array: {}", e))
}