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Functions
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// example_models with get_example_model function
use std::path::PathBuf;
use project_root::get_project_root;
use walkdir::WalkDir;
use crate::parse::model_from_json;
use crate::Model;
/// Searches recursively in `../tests/integration` folder for an `.essence` file matching the given
/// filename, then uses conjure to process it into astjson, and returns the parsed model.
///
/// # Arguments
/// * `filename` - A string slice that holds filename without extension
/// # Returns
/// Function returns a `Result<Value, anyhow::Error>`, where `Value` is the parsed model.
pub fn get_example_model(filename: &str) -> Result<Model, anyhow::Error> {
// define relative path -> integration tests dir
let base_dir = get_project_root()?;
let mut essence_path = PathBuf::new();
// walk through directory tree recursively starting at base
for entry in WalkDir::new(base_dir).into_iter().filter_map(|e| e.ok()) {
let path = entry.path();
if path.is_file()
&& path.extension().map_or(false, |e| e == "essence")
&& path.file_stem() == Some(std::ffi::OsStr::new(filename))
{
essence_path = path.to_path_buf();
break;
}
//println!("PATH TO FILE: {}", essence_path.display());
// return error if file not found
if essence_path.as_os_str().is_empty() {
return Err(anyhow::Error::new(std::io::Error::new(
std::io::ErrorKind::NotFound,
"ERROR: File not found in any subdirectory",
)));
// let path = PathBuf::from(format!("../tests/integration/basic/comprehension{}.essence", filename));
let mut cmd = std::process::Command::new("conjure");
let output = cmd
.arg("pretty")
.arg("--output-format=astjson")
.arg(essence_path)
.output()?;
// convert Conjure's stdout from bytes to string
let astjson = String::from_utf8(output.stdout)?;
//println!("ASTJSON: {}", astjson);
// parse AST JSON from desired Model format
let generated_mdl = model_from_json(&astjson, Default::default())?;
Ok(generated_mdl)
/// Searches for an `.essence` file at the given filepath,
/// then uses conjure to process it into astjson, and returns the parsed model.
/// * `filepath` - A string slice that holds the full file path
/// Function returns a `Result<Value, anyhow::Error>`, where `Value` is the parsed model
pub fn get_example_model_by_path(filepath: &str) -> Result<Model, anyhow::Error> {
let essence_path = PathBuf::from(filepath);
// println!("PATH TO FILE: {}", essence_path.display());
// Command execution using 'conjure' CLI tool with provided path
.arg(&essence_path)
// println!("ASTJSON: {}", astjson);
// parse AST JSON into the desired Model format
let generated_model = model_from_json(&astjson, Default::default())?;
Ok(generated_model)