just/src/run.rs

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Rust
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use crate::common::*;
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use crate::interrupt_handler::InterruptHandler;
use unicode_width::UnicodeWidthStr;
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fn edit<P: AsRef<OsStr>>(path: P) -> Result<(), i32> {
let editor = match env::var_os("EDITOR") {
None => {
eprintln!("Error getting EDITOR environment variable");
return Err(EXIT_FAILURE);
}
Some(editor) => editor,
};
let error = Command::new(editor).arg(path).status();
match error {
Ok(status) => {
if status.success() {
Ok(())
} else {
eprintln!("Editor failed: {}", status);
Err(status.code().unwrap_or(EXIT_FAILURE))
}
}
Err(error) => {
eprintln!("Failed to invoke editor: {}", error);
Err(EXIT_FAILURE)
}
}
}
pub fn run() -> Result<(), i32> {
#[cfg(windows)]
ansi_term::enable_ansi_support().ok();
env_logger::Builder::from_env(
env_logger::Env::new()
.filter("JUST_LOG")
.write_style("JUST_LOG_STYLE"),
)
.init();
let app = Config::app();
let matches = app.get_matches();
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let config = match Config::from_matches(&matches) {
Ok(config) => config,
Err(error) => {
eprintln!("error: {}", error);
return Err(EXIT_FAILURE);
}
};
let justfile = config.justfile;
let mut working_directory = config.working_directory.map(PathBuf::from);
if let (Some(justfile), None) = (justfile, working_directory.as_ref()) {
let mut justfile = justfile.to_path_buf();
if !justfile.is_absolute() {
match justfile.canonicalize() {
Ok(canonical) => justfile = canonical,
Err(err) => {
eprintln!(
"Could not canonicalize justfile path `{}`: {}",
justfile.display(),
err
);
return Err(EXIT_FAILURE);
}
}
}
justfile.pop();
working_directory = Some(justfile);
}
let text;
if let (Some(justfile), Some(directory)) = (justfile, working_directory) {
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if config.subcommand == Subcommand::Edit {
return edit(justfile);
}
text = fs::read_to_string(justfile)
.unwrap_or_else(|error| die!("Error reading justfile: {}", error));
if let Err(error) = env::set_current_dir(&directory) {
die!(
"Error changing directory to {}: {}",
directory.display(),
error
);
}
} else {
let current_dir = match env::current_dir() {
Ok(current_dir) => current_dir,
Err(io_error) => die!("Error getting current dir: {}", io_error),
};
match search::justfile(&current_dir) {
Ok(name) => {
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if config.subcommand == Subcommand::Edit {
return edit(name);
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}
text = match fs::read_to_string(&name) {
Err(error) => {
eprintln!("Error reading justfile: {}", error);
return Err(EXIT_FAILURE);
}
Ok(text) => text,
};
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let parent = name.parent().unwrap();
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if let Err(error) = env::set_current_dir(&parent) {
eprintln!(
"Error changing directory to {}: {}",
parent.display(),
error
);
return Err(EXIT_FAILURE);
}
}
Err(search_error) => {
eprintln!("{}", search_error);
return Err(EXIT_FAILURE);
}
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}
}
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let justfile = match Compiler::compile(&text) {
Err(error) => {
if config.color.stderr().active() {
eprintln!("{:#}", error);
} else {
eprintln!("{}", error);
}
return Err(EXIT_FAILURE);
}
Ok(justfile) => justfile,
};
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for warning in &justfile.warnings {
if config.color.stderr().active() {
eprintln!("{:#}", warning);
} else {
eprintln!("{}", warning);
}
}
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if config.subcommand == Subcommand::Summary {
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if justfile.count() == 0 {
eprintln!("Justfile contains no recipes.");
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} else {
let summary = justfile
.recipes
.iter()
.filter(|&(_, recipe)| !recipe.private)
.map(|(name, _)| name)
.cloned()
.collect::<Vec<_>>()
.join(" ");
println!("{}", summary);
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}
return Ok(());
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}
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if config.subcommand == Subcommand::Dump {
println!("{}", justfile);
return Ok(());
}
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if config.subcommand == Subcommand::List {
// Construct a target to alias map.
let mut recipe_aliases: BTreeMap<&str, Vec<&str>> = BTreeMap::new();
for alias in justfile.aliases.values() {
if alias.is_private() {
continue;
}
if !recipe_aliases.contains_key(alias.target.lexeme()) {
recipe_aliases.insert(alias.target.lexeme(), vec![alias.name.lexeme()]);
} else {
let aliases = recipe_aliases.get_mut(alias.target.lexeme()).unwrap();
aliases.push(alias.name.lexeme());
}
}
let mut line_widths: BTreeMap<&str, usize> = BTreeMap::new();
for (name, recipe) in &justfile.recipes {
if recipe.private {
continue;
}
for name in iter::once(name).chain(recipe_aliases.get(name).unwrap_or(&Vec::new())) {
let mut line_width = UnicodeWidthStr::width(*name);
for parameter in &recipe.parameters {
line_width += UnicodeWidthStr::width(format!(" {}", parameter).as_str());
}
if line_width <= 30 {
line_widths.insert(name, line_width);
}
}
}
let max_line_width = cmp::min(line_widths.values().cloned().max().unwrap_or(0), 30);
let doc_color = config.color.stdout().doc();
println!("Available recipes:");
for (name, recipe) in &justfile.recipes {
if recipe.private {
continue;
}
let alias_doc = format!("alias for `{}`", recipe.name);
for (i, name) in iter::once(name)
.chain(recipe_aliases.get(name).unwrap_or(&Vec::new()))
.enumerate()
{
print!(" {}", name);
for parameter in &recipe.parameters {
if config.color.stdout().active() {
print!(" {:#}", parameter);
} else {
print!(" {}", parameter);
}
}
// Declaring this outside of the nested loops will probably be more efficient, but
// it creates all sorts of lifetime issues with variables inside the loops.
// If this is inlined like the docs say, it shouldn't make any difference.
let print_doc = |doc| {
print!(
" {:padding$}{} {}",
"",
doc_color.paint("#"),
doc_color.paint(doc),
padding = max_line_width
.saturating_sub(line_widths.get(name).cloned().unwrap_or(max_line_width))
);
};
match (i, recipe.doc) {
(0, Some(doc)) => print_doc(doc),
(0, None) => (),
_ => print_doc(&alias_doc),
}
println!();
}
}
return Ok(());
}
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if let Subcommand::Show { name } = config.subcommand {
if let Some(alias) = justfile.get_alias(name) {
let recipe = justfile.get_recipe(alias.target.lexeme()).unwrap();
println!("{}", alias);
println!("{}", recipe);
return Ok(());
}
if let Some(recipe) = justfile.get_recipe(name) {
println!("{}", recipe);
return Ok(());
} else {
eprintln!("Justfile does not contain recipe `{}`.", name);
if let Some(suggestion) = justfile.suggest(name) {
eprintln!("Did you mean `{}`?", suggestion);
}
return Err(EXIT_FAILURE);
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}
}
let arguments = if !config.arguments.is_empty() {
config.arguments.clone()
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} else if let Some(recipe) = justfile.first() {
let min_arguments = recipe.min_arguments();
if min_arguments > 0 {
die!(
"Recipe `{}` cannot be used as default recipe since it requires at least {} {}.",
recipe.name,
min_arguments,
Count("argument", min_arguments),
);
}
vec![recipe.name()]
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} else {
die!("Justfile contains no recipes.");
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};
if let Err(error) = InterruptHandler::install() {
warn!("Failed to set CTRL-C handler: {}", error)
}
if let Err(run_error) = justfile.run(&arguments, &config) {
if !config.quiet {
if config.color.stderr().active() {
eprintln!("{:#}", run_error);
} else {
eprintln!("{}", run_error);
}
}
return Err(run_error.code().unwrap_or(EXIT_FAILURE));
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}
Ok(())
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}