use crate::common::*;
use std::process::{Command, ExitStatus, Stdio};
use crate::platform::{Platform, PlatformInterface};
fn error_from_signal(
recipe: &str,
line_number: Option<usize>,
exit_status: ExitStatus,
) -> RuntimeError {
match Platform::signal_from_exit_status(exit_status) {
Some(signal) => RuntimeError::Signal {
recipe,
line_number,
signal,
},
None => RuntimeError::Unknown {
recipe,
line_number,
},
}
}
#[derive(PartialEq, Debug)]
pub struct Recipe<'a> {
pub dependencies: Vec<&'a str>,
pub dependency_tokens: Vec<Token<'a>>,
pub doc: Option<&'a str>,
pub line_number: usize,
pub lines: Vec<Vec<Fragment<'a>>>,
pub name: &'a str,
pub parameters: Vec<Parameter<'a>>,
pub private: bool,
pub quiet: bool,
pub shebang: bool,
}
impl<'a> Recipe<'a> {
pub fn argument_range(&self) -> RangeInclusive<usize> {
self.min_arguments()..=self.max_arguments()
}
pub fn min_arguments(&self) -> usize {
self
.parameters
.iter()
.filter(|p| p.default.is_none())
.count()
}
pub fn max_arguments(&self) -> usize {
if self.parameters.iter().any(|p| p.variadic) {
usize::MAX - 1
} else {
self.parameters.len()
}
}
pub fn run(
&self,
context: &RecipeContext<'a>,
arguments: &[&'a str],
dotenv: &BTreeMap<String, String>,
exports: &BTreeSet<&'a str>,
) -> RunResult<'a, ()> {
let configuration = &context.configuration;
if configuration.verbosity.loquacious() {
let color = configuration.color.stderr().banner();
eprintln!(
"{}===> Running recipe `{}`...{}",
color.prefix(),
self.name,
color.suffix()
);
}
let mut argument_map = BTreeMap::new();
let mut evaluator = AssignmentEvaluator {
assignments: &empty(),
dry_run: configuration.dry_run,
evaluated: empty(),
invocation_directory: context.invocation_directory,
overrides: &empty(),
quiet: configuration.quiet,
scope: &context.scope,
shell: configuration.shell,
dotenv,
exports,
};
let mut rest = arguments;
for parameter in &self.parameters {
let value = if rest.is_empty() {
match parameter.default {
Some(ref default) => Cow::Owned(evaluator.evaluate_expression(default, &empty())?),
None => {
return Err(RuntimeError::Internal {
message: "missing parameter without default".to_string(),
});
}
}
} else if parameter.variadic {
let value = Cow::Owned(rest.to_vec().join(" "));
rest = &[];
value
} else {
let value = Cow::Borrowed(rest[0]);
rest = &rest[1..];
value
};
argument_map.insert(parameter.name, value);
}
if self.shebang {
let mut evaluated_lines = vec![];
for line in &self.lines {
evaluated_lines.push(evaluator.evaluate_line(line, &argument_map)?);
}
if configuration.dry_run || self.quiet {
for line in &evaluated_lines {
eprintln!("{}", line);
}
}
if configuration.dry_run {
return Ok(());
}
let tmp = TempDir::new("just").map_err(|error| RuntimeError::TmpdirIoError {
recipe: self.name,
io_error: error,
})?;
let mut path = tmp.path().to_path_buf();
path.push(self.name);
{
let mut f = fs::File::create(&path).map_err(|error| RuntimeError::TmpdirIoError {
recipe: self.name,
io_error: error,
})?;
let mut text = String::new();
text += &evaluated_lines[0];
text += "\n";
for _ in 1..(self.line_number + 2) {
text += "\n"
}
for line in &evaluated_lines[1..] {
text += line;
text += "\n";
}
if configuration.verbosity.grandiloquent() {
eprintln!("{}", configuration.color.doc().stderr().paint(&text));
}
f.write_all(text.as_bytes())
.map_err(|error| RuntimeError::TmpdirIoError {
recipe: self.name,
io_error: error,
})?;
}
Platform::set_execute_permission(&path).map_err(|error| RuntimeError::TmpdirIoError {
recipe: self.name,
io_error: error,
})?;
let shebang_line = evaluated_lines
.first()
.ok_or_else(|| RuntimeError::Internal {
message: "evaluated_lines was empty".to_string(),
})?;
let Shebang {
interpreter,
argument,
} = Shebang::new(shebang_line).ok_or_else(|| RuntimeError::Internal {
message: format!("bad shebang line: {}", shebang_line),
})?;
let mut command =
Platform::make_shebang_command(&path, interpreter, argument).map_err(|output_error| {
RuntimeError::Cygpath {
recipe: self.name,
output_error,
}
})?;
command.export_environment_variables(&context.scope, dotenv, exports)?;
match InterruptHandler::guard(|| command.status()) {
Ok(exit_status) => {
if let Some(code) = exit_status.code() {
if code != 0 {
return Err(RuntimeError::Code {
recipe: self.name,
line_number: None,
code,
});
}
} else {
return Err(error_from_signal(self.name, None, exit_status));
}
}
Err(io_error) => {
return Err(RuntimeError::Shebang {
recipe: self.name,
command: interpreter.to_string(),
argument: argument.map(String::from),
io_error,
});
}
};
} else {
let mut lines = self.lines.iter().peekable();
let mut line_number = self.line_number + 1;
loop {
if lines.peek().is_none() {
break;
}
let mut evaluated = String::new();
loop {
if lines.peek().is_none() {
break;
}
let line = lines.next().unwrap();
line_number += 1;
evaluated += &evaluator.evaluate_line(line, &argument_map)?;
if line.last().map(Fragment::continuation).unwrap_or(false) {
evaluated.pop();
} else {
break;
}
}
let mut command = evaluated.as_str();
let quiet_command = command.starts_with('@');
if quiet_command {
command = &command[1..];
}
if command == "" {
continue;
}
if configuration.dry_run
|| configuration.verbosity.loquacious()
|| !((quiet_command ^ self.quiet) || configuration.quiet)
{
let color = if configuration.highlight {
configuration.color.command()
} else {
configuration.color
};
eprintln!("{}", color.stderr().paint(command));
}
if configuration.dry_run {
continue;
}
let mut cmd = Command::new(configuration.shell);
cmd.arg("-cu").arg(command);
if configuration.quiet {
cmd.stderr(Stdio::null());
cmd.stdout(Stdio::null());
}
cmd.export_environment_variables(&context.scope, dotenv, exports)?;
match InterruptHandler::guard(|| cmd.status()) {
Ok(exit_status) => {
if let Some(code) = exit_status.code() {
if code != 0 {
return Err(RuntimeError::Code {
recipe: self.name,
line_number: Some(line_number),
code,
});
}
} else {
return Err(error_from_signal(self.name, Some(line_number), exit_status));
}
}
Err(io_error) => {
return Err(RuntimeError::IoError {
recipe: self.name,
io_error,
});
}
};
}
}
Ok(())
}
}
impl<'a> Display for Recipe<'a> {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
if let Some(doc) = self.doc {
writeln!(f, "# {}", doc)?;
}
if self.quiet {
write!(f, "@{}", self.name)?;
} else {
write!(f, "{}", self.name)?;
}
for parameter in &self.parameters {
write!(f, " {}", parameter)?;
}
write!(f, ":")?;
for dependency in &self.dependencies {
write!(f, " {}", dependency)?;
}
for (i, pieces) in self.lines.iter().enumerate() {
if i == 0 {
writeln!(f)?;
}
for (j, piece) in pieces.iter().enumerate() {
if j == 0 {
write!(f, " ")?;
}
match *piece {
Fragment::Text { ref text } => write!(f, "{}", text.lexeme())?,
Fragment::Expression { ref expression, .. } => write!(f, "{{{{{}}}}}", expression)?,
}
}
if i + 1 < self.lines.len() {
writeln!(f)?;
}
}
Ok(())
}
}