357 lines
9.4 KiB
Rust
357 lines
9.4 KiB
Rust
use crate::common::*;
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use std::process::{ExitStatus, Stdio};
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/// Return a `RuntimeError::Signal` if the process was terminated by a signal,
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/// otherwise return an `RuntimeError::UnknownFailure`
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fn error_from_signal(
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recipe: &str,
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line_number: Option<usize>,
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exit_status: ExitStatus,
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) -> RuntimeError {
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match Platform::signal_from_exit_status(exit_status) {
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Some(signal) => RuntimeError::Signal {
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recipe,
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line_number,
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signal,
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},
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None => RuntimeError::Unknown {
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recipe,
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line_number,
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},
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}
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}
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/// A recipe, e.g. `foo: bar baz`
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#[derive(PartialEq, Debug, Clone)]
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pub(crate) struct Recipe<'src, D = Dependency<'src>> {
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pub(crate) dependencies: Vec<D>,
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pub(crate) doc: Option<&'src str>,
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pub(crate) body: Vec<Line<'src>>,
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pub(crate) name: Name<'src>,
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pub(crate) parameters: Vec<Parameter<'src>>,
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pub(crate) private: bool,
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pub(crate) quiet: bool,
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pub(crate) shebang: bool,
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}
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impl<'src, D> Recipe<'src, D> {
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pub(crate) fn argument_range(&self) -> RangeInclusive<usize> {
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self.min_arguments()..=self.max_arguments()
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}
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pub(crate) fn min_arguments(&self) -> usize {
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self
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.parameters
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.iter()
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.filter(|p| p.default.is_none() && p.kind != ParameterKind::Star)
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.count()
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}
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pub(crate) fn max_arguments(&self) -> usize {
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if self.parameters.iter().any(|p| p.kind.is_variadic()) {
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usize::max_value() - 1
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} else {
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self.parameters.len()
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}
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}
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pub(crate) fn name(&self) -> &'src str {
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self.name.lexeme()
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}
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pub(crate) fn line_number(&self) -> usize {
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self.name.line
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}
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pub(crate) fn public(&self) -> bool {
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!self.private
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}
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pub(crate) fn run<'run>(
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&self,
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context: &RecipeContext<'src, 'run>,
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dotenv: &BTreeMap<String, String>,
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scope: Scope<'src, 'run>,
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search: &'run Search,
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positional: &[String],
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) -> RunResult<'src, ()> {
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let config = &context.config;
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if config.verbosity.loquacious() {
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let color = config.color.stderr().banner();
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eprintln!(
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"{}===> Running recipe `{}`...{}",
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color.prefix(),
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self.name,
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color.suffix()
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);
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}
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let mut evaluator =
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Evaluator::recipe_evaluator(context.config, dotenv, &scope, context.settings, search);
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if self.shebang {
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let mut evaluated_lines = vec![];
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for line in &self.body {
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evaluated_lines.push(evaluator.evaluate_line(line, false)?);
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}
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if config.verbosity.loud() && (config.dry_run || self.quiet) {
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for line in &evaluated_lines {
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eprintln!("{}", line);
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}
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}
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if config.dry_run {
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return Ok(());
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}
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let shebang_line = evaluated_lines
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.first()
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.ok_or_else(|| RuntimeError::Internal {
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message: "evaluated_lines was empty".to_owned(),
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})?;
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let shebang = Shebang::new(shebang_line).ok_or_else(|| RuntimeError::Internal {
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message: format!("bad shebang line: {}", shebang_line),
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})?;
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let tmp = tempfile::Builder::new()
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.prefix("just")
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.tempdir()
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.map_err(|error| RuntimeError::TmpdirIoError {
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recipe: self.name(),
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io_error: error,
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})?;
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let mut path = tmp.path().to_path_buf();
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path.push(shebang.script_filename(self.name()));
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{
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let mut f = fs::File::create(&path).map_err(|error| RuntimeError::TmpdirIoError {
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recipe: self.name(),
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io_error: error,
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})?;
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let mut text = String::new();
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if shebang.include_shebang_line() {
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text += &evaluated_lines[0];
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} else {
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text += "\n";
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}
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text += "\n";
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// add blank lines so that lines in the generated script have the same line
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// number as the corresponding lines in the justfile
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for _ in 1..(self.line_number() + 2) {
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text += "\n";
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}
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for line in &evaluated_lines[1..] {
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text += line;
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text += "\n";
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}
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if config.verbosity.grandiloquent() {
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eprintln!("{}", config.color.doc().stderr().paint(&text));
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}
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f.write_all(text.as_bytes())
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.map_err(|error| RuntimeError::TmpdirIoError {
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recipe: self.name(),
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io_error: error,
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})?;
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}
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// make the script executable
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Platform::set_execute_permission(&path).map_err(|error| RuntimeError::TmpdirIoError {
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recipe: self.name(),
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io_error: error,
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})?;
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// create a command to run the script
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let mut command =
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Platform::make_shebang_command(&path, &context.search.working_directory, shebang).map_err(
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|output_error| RuntimeError::Cygpath {
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recipe: self.name(),
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output_error,
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},
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)?;
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if context.settings.positional_arguments {
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command.args(positional);
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}
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command.export(context.settings, dotenv, &scope);
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// run it!
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match InterruptHandler::guard(|| command.status()) {
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Ok(exit_status) =>
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if let Some(code) = exit_status.code() {
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if code != 0 {
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return Err(RuntimeError::Code {
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recipe: self.name(),
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line_number: None,
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code,
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});
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}
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} else {
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return Err(error_from_signal(self.name(), None, exit_status));
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},
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Err(io_error) => {
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return Err(RuntimeError::Shebang {
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recipe: self.name(),
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command: shebang.interpreter.to_owned(),
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argument: shebang.argument.map(String::from),
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io_error,
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});
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},
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};
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} else {
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let mut lines = self.body.iter().peekable();
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let mut line_number = self.line_number() + 1;
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loop {
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if lines.peek().is_none() {
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break;
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}
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let mut evaluated = String::new();
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let mut continued = false;
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let quiet_command = lines.peek().map(|line| line.is_quiet()).unwrap_or(false);
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let infallable_command = lines
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.peek()
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.map(|line| line.is_infallable())
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.unwrap_or(false);
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loop {
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if lines.peek().is_none() {
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break;
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}
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let line = lines.next().unwrap();
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line_number += 1;
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evaluated += &evaluator.evaluate_line(line, continued)?;
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if line.is_continuation() {
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continued = true;
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evaluated.pop();
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} else {
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break;
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}
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}
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let mut command = evaluated.as_str();
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if quiet_command || infallable_command {
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command = &command[1..];
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}
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if command.is_empty() {
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continue;
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}
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if config.dry_run
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|| config.verbosity.loquacious()
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|| !((quiet_command ^ self.quiet) || config.verbosity.quiet())
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{
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let color = if config.highlight {
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config.color.command()
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} else {
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config.color
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};
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eprintln!("{}", color.stderr().paint(command));
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}
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if config.dry_run {
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continue;
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}
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let mut cmd = context.settings.shell_command(config);
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cmd.current_dir(&context.search.working_directory);
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cmd.arg(command);
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if context.settings.positional_arguments {
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cmd.arg(self.name.lexeme());
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cmd.args(positional);
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}
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if config.verbosity.quiet() {
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cmd.stderr(Stdio::null());
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cmd.stdout(Stdio::null());
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}
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cmd.export(context.settings, dotenv, &scope);
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match InterruptHandler::guard(|| cmd.status()) {
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Ok(exit_status) =>
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if let Some(code) = exit_status.code() {
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if code != 0 && !infallable_command {
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return Err(RuntimeError::Code {
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recipe: self.name(),
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line_number: Some(line_number),
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code,
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});
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}
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} else {
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return Err(error_from_signal(
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self.name(),
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Some(line_number),
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exit_status,
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));
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},
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Err(io_error) => {
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return Err(RuntimeError::IoError {
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recipe: self.name(),
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io_error,
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});
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},
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};
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}
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}
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Ok(())
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}
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}
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impl<'src, D> Keyed<'src> for Recipe<'src, D> {
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fn key(&self) -> &'src str {
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self.name.lexeme()
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}
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}
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impl<'src, D: Display> Display for Recipe<'src, D> {
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fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
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if let Some(doc) = self.doc {
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writeln!(f, "# {}", doc)?;
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}
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if self.quiet {
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write!(f, "@{}", self.name)?;
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} else {
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write!(f, "{}", self.name)?;
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}
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for parameter in &self.parameters {
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write!(f, " {}", parameter)?;
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}
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write!(f, ":")?;
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for dependency in &self.dependencies {
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write!(f, " {}", dependency)?;
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}
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for (i, line) in self.body.iter().enumerate() {
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if i == 0 {
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writeln!(f)?;
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}
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for (j, fragment) in line.fragments.iter().enumerate() {
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if j == 0 {
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write!(f, " ")?;
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}
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match fragment {
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Fragment::Text { token } => write!(f, "{}", token.lexeme())?,
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Fragment::Interpolation { expression, .. } => write!(f, "{{{{ {} }}}}", expression)?,
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}
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}
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if i + 1 < self.body.len() {
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writeln!(f)?;
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}
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}
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Ok(())
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}
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}
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