git.delta.rocks / jrsonnet / refs/commits / fe52b32db444

1mod manifest;2mod stdlib;3mod tla;4mod trace;56use std::{env, marker::PhantomData, path::PathBuf};78use clap::Parser;9use jrsonnet_evaluator::{10	error::Result, stack::StackDepthLimitOverrideGuard, FileImportResolver, State,11};12use jrsonnet_gcmodule::with_thread_object_space;13pub use manifest::*;14pub use stdlib::*;15pub use tla::*;16pub use trace::*;1718pub trait ConfigureState {19	type Guards;2021	fn configure(&self, s: &State) -> Result<Self::Guards>;22}2324#[derive(Parser)]25#[clap(next_help_heading = "INPUT")]26pub struct InputOpts {27	/// Treat input as code, evaluate them instead of reading file28	#[clap(long, short = 'e')]29	pub exec: bool,3031	/// Path to the file to be compiled if `--evaluate` is unset, otherwise code itself32	pub input: String,33}3435#[derive(Parser)]36#[clap(next_help_heading = "OPTIONS")]37pub struct MiscOpts {38	/// Maximal allowed number of stack frames,39	/// stack overflow error will be raised if this number gets exceeded.40	#[clap(long, short = 's', default_value = "200")]41	max_stack: usize,4243	/// Library search dirs. (right-most wins)44	/// Any not found `imported` file will be searched in these.45	/// This can also be specified via `JSONNET_PATH` variable,46	/// which should contain a colon-separated (semicolon-separated on Windows) list of directories.47	#[clap(long, short = 'J')]48	jpath: Vec<PathBuf>,49}50impl ConfigureState for MiscOpts {51	type Guards = StackDepthLimitOverrideGuard;52	fn configure(&self, s: &State) -> Result<Self::Guards> {53		let mut library_paths = self.jpath.clone();54		library_paths.reverse();55		if let Some(path) = env::var_os("JSONNET_PATH") {56			library_paths.extend(env::split_paths(path.as_os_str()));57		}5859		s.set_import_resolver(Box::new(FileImportResolver::new(library_paths)));6061		let _depth_limit = jrsonnet_evaluator::stack::limit_stack_depth(self.max_stack);62		Ok(_depth_limit)63	}64}6566/// General configuration of jsonnet67#[derive(Parser)]68#[clap(name = "jrsonnet", version, author)]69pub struct GeneralOpts {70	#[clap(flatten)]71	misc: MiscOpts,7273	#[clap(flatten)]74	tla: TLAOpts,75	#[clap(flatten)]76	std: StdOpts,7778	#[clap(flatten)]79	trace: TraceOpts,8081	#[clap(flatten)]82	gc: GcOpts,83}8485impl ConfigureState for GeneralOpts {86	type Guards = (87		<MiscOpts as ConfigureState>::Guards,88		<GcOpts as ConfigureState>::Guards,89	);90	fn configure(&self, s: &State) -> Result<Self::Guards> {91		// Configure trace first, because tla-code/ext-code can throw92		self.trace.configure(s)?;93		let misc_guards = self.misc.configure(s)?;94		self.tla.configure(s)?;95		self.std.configure(s)?;96		let gc_guards = self.gc.configure(s)?;97		Ok((misc_guards, gc_guards))98	}99}100101#[derive(Parser)]102#[clap(next_help_heading = "GARBAGE COLLECTION")]103pub struct GcOpts {104	/// Do not skip gc on exit105	#[clap(long)]106	gc_collect_on_exit: bool,107	/// Print gc stats before exit108	#[clap(long)]109	gc_print_stats: bool,110	/// Force garbage collection before printing stats111	/// Useful for checking for memory leaks112	/// Does nothing useless --gc-print-stats is specified113	#[clap(long)]114	gc_collect_before_printing_stats: bool,115}116impl ConfigureState for GcOpts {117	type Guards = (Option<GcStatsPrinter>, Option<LeakSpace>);118119	fn configure(&self, _s: &State) -> Result<Self::Guards> {120		// Constructed structs have side-effects in Drop impl121		#[allow(clippy::unnecessary_lazy_evaluations)]122		Ok((123			self.gc_print_stats.then(|| GcStatsPrinter {124				collect_before_printing_stats: self.gc_collect_before_printing_stats,125			}),126			(!self.gc_collect_on_exit).then(|| LeakSpace(PhantomData)),127		))128	}129}130131pub struct LeakSpace(PhantomData<()>);132133impl Drop for LeakSpace {134	fn drop(&mut self) {135		with_thread_object_space(|s| s.leak())136	}137}138139pub struct GcStatsPrinter {140	collect_before_printing_stats: bool,141}142impl Drop for GcStatsPrinter {143	fn drop(&mut self) {144		eprintln!("=== GC STATS ===");145		if self.collect_before_printing_stats {146			let collected = jrsonnet_gcmodule::collect_thread_cycles();147			eprintln!("Collected: {}", collected);148		}149		eprintln!("Tracked: {}", jrsonnet_gcmodule::count_thread_tracked())150	}151}