git.delta.rocks / jrsonnet / refs/commits / 1f5d87f33b16

1use std::{fs::read_to_string, str::FromStr};23use clap::Parser;4use jrsonnet_evaluator::{error::Result, tb, trace::PathResolver, State};56use crate::ConfigureState;78#[derive(Clone)]9pub struct ExtStr {10	pub name: String,11	pub value: String,12}1314impl FromStr for ExtStr {15	type Err = &'static str;16	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {17		let out: Vec<_> = s.split('=').collect();18		match out.len() {19			1 => Ok(ExtStr {20				name: out[0].to_owned(),21				value: std::env::var(out[0]).or(Err("missing env var"))?,22			}),23			2 => Ok(ExtStr {24				name: out[0].to_owned(),25				value: out[1].to_owned(),26			}),2728			_ => Err("bad ext-str syntax"),29		}30	}31}3233#[derive(Clone)]34pub struct ExtFile {35	pub name: String,36	pub value: String,37}3839impl FromStr for ExtFile {40	type Err = String;4142	fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {43		let out: Vec<&str> = s.split('=').collect();44		if out.len() != 2 {45			return Err("bad ext-file syntax".to_owned());46		}47		let file = read_to_string(out[1]);48		match file {49			Ok(content) => Ok(Self {50				name: out[0].into(),51				value: content,52			}),53			Err(e) => Err(format!("{}", e)),54		}55	}56}5758#[derive(Parser)]59#[clap(next_help_heading = "STANDARD LIBRARY")]60pub struct StdOpts {61	/// Disable standard library.62	/// By default standard library will be available via global `std` variable.63	#[clap(long)]64	no_stdlib: bool,65	/// Add string external variable.66	/// External variables are globally available so it is preferred67	/// to use top level arguments whenever it's possible.68	/// If [=data] is not set then it will be read from `name` env variable.69	/// Can be accessed from code via `std.extVar("name")`.70	#[clap(long, short = 'V', name = "name[=var data]", number_of_values = 1)]71	ext_str: Vec<ExtStr>,72	/// Read string external variable from file.73	/// See also `--ext-str`74	#[clap(long, name = "name=var path", number_of_values = 1)]75	ext_str_file: Vec<ExtFile>,76	/// Add external variable from code.77	/// See also `--ext-str`78	#[clap(long, name = "name[=var source]", number_of_values = 1)]79	ext_code: Vec<ExtStr>,80	/// Read string external variable from file.81	/// See also `--ext-str`82	#[clap(long, name = "name=var code path", number_of_values = 1)]83	ext_code_file: Vec<ExtFile>,84}85impl ConfigureState for StdOpts {86	type Guards = ();87	fn configure(&self, s: &State) -> Result<()> {88		if self.no_stdlib {89			return Ok(());90		}91		let ctx =92			jrsonnet_stdlib::ContextInitializer::new(s.clone(), PathResolver::new_cwd_fallback());93		for ext in self.ext_str.iter() {94			ctx.add_ext_str((&ext.name as &str).into(), (&ext.value as &str).into());95		}96		for ext in self.ext_str_file.iter() {97			ctx.add_ext_str((&ext.name as &str).into(), (&ext.value as &str).into());98		}99		for ext in self.ext_code.iter() {100			ctx.add_ext_code(&ext.name as &str, &ext.value as &str)?;101		}102		for ext in self.ext_code_file.iter() {103			ctx.add_ext_code(&ext.name as &str, &ext.value as &str)?;104		}105		s.settings_mut().context_initializer = tb!(ctx);106		Ok(())107	}108}