git.delta.rocks / jrsonnet / refs/commits / 79e339a14c35

1use std::{fs::read_to_string, str::FromStr};23use clap::Parser;4use jrsonnet_evaluator::{error::Result, trace::PathResolver, State};5use jrsonnet_stdlib::ContextInitializer;67#[derive(Clone)]8pub struct ExtStr {9	pub name: String,10	pub value: String,11}1213impl FromStr for ExtStr {14	type Err = &'static str;15	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {16		match s.find('=') {17			Some(idx) => Ok(ExtStr {18				name: s[..idx].to_owned(),19				value: s[idx + 1..].to_owned(),20			}),21			None => Ok(ExtStr {22				name: s.to_owned(),23				value: std::env::var(s).or(Err("missing env var"))?,24			}),25		}26	}27}2829#[derive(Clone)]30pub struct ExtFile {31	pub name: String,32	pub value: String,33}3435impl FromStr for ExtFile {36	type Err = String;3738	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {39		let out: Vec<&str> = s.split('=').collect();40		if out.len() != 2 {41			return Err("bad ext-file syntax".to_owned());42		}43		let file = read_to_string(out[1]);44		match file {45			Ok(content) => Ok(Self {46				name: out[0].into(),47				value: content,48			}),49			Err(e) => Err(format!("{e}")),50		}51	}52}5354#[derive(Parser)]55#[clap(next_help_heading = "STANDARD LIBRARY")]56pub struct StdOpts {57	/// Disable standard library.58	/// By default standard library will be available via global `std` variable.59	#[clap(long)]60	no_stdlib: bool,61	/// Add string external variable.62	/// External variables are globally available so it is preferred63	/// to use top level arguments whenever it's possible.64	/// If [=data] is not set then it will be read from `name` env variable.65	/// Can be accessed from code via `std.extVar("name")`.66	#[clap(long, short = 'V', name = "name[=var data]", number_of_values = 1)]67	ext_str: Vec<ExtStr>,68	/// Read string external variable from file.69	/// See also `--ext-str`70	#[clap(long, name = "name=var path", number_of_values = 1)]71	ext_str_file: Vec<ExtFile>,72	/// Add external variable from code.73	/// See also `--ext-str`74	#[clap(long, name = "name[=var source]", number_of_values = 1)]75	ext_code: Vec<ExtStr>,76	/// Read string external variable from file.77	/// See also `--ext-str`78	#[clap(long, name = "name=var code path", number_of_values = 1)]79	ext_code_file: Vec<ExtFile>,80}81impl StdOpts {82	pub fn context_initializer(&self, s: &State) -> Result<Option<ContextInitializer>> {83		if self.no_stdlib {84			return Ok(None);85		}86		let ctx = ContextInitializer::new(s.clone(), PathResolver::new_cwd_fallback());87		for ext in self.ext_str.iter() {88			ctx.add_ext_str((&ext.name as &str).into(), (&ext.value as &str).into());89		}90		for ext in self.ext_str_file.iter() {91			ctx.add_ext_str((&ext.name as &str).into(), (&ext.value as &str).into());92		}93		for ext in self.ext_code.iter() {94			ctx.add_ext_code(&ext.name as &str, &ext.value as &str)?;95		}96		for ext in self.ext_code_file.iter() {97			ctx.add_ext_code(&ext.name as &str, &ext.value as &str)?;98		}99		Ok(Some(ctx))100	}101}