just/src/run.rs
2019-06-01 22:38:02 -07:00

499 lines
13 KiB
Rust

use crate::common::*;
use crate::configuration::DEFAULT_SHELL;
use crate::interrupt_handler::InterruptHandler;
use crate::misc::maybe_s;
use clap::{App, AppSettings, Arg, ArgGroup};
use std::{convert, ffi};
use unicode_width::UnicodeWidthStr;
#[cfg(windows)]
use ansi_term::enable_ansi_support;
fn edit<P: convert::AsRef<ffi::OsStr>>(path: P) -> ! {
let editor =
env::var_os("EDITOR").unwrap_or_else(|| die!("Error getting EDITOR environment variable"));
let error = Command::new(editor).arg(path).status();
match error {
Ok(status) => process::exit(status.code().unwrap_or(EXIT_FAILURE)),
Err(error) => die!("Failed to invoke editor: {}", error),
}
}
pub fn run() {
#[cfg(windows)]
enable_ansi_support().ok();
env_logger::Builder::from_env(
env_logger::Env::new()
.filter("JUST_LOG")
.write_style("JUST_LOG_STYLE"),
)
.init();
let invocation_directory =
env::current_dir().map_err(|e| format!("Error getting current directory: {}", e));
let matches = App::new(env!("CARGO_PKG_NAME"))
.version(concat!("v", env!("CARGO_PKG_VERSION")))
.author(env!("CARGO_PKG_AUTHORS"))
.about(concat!(
env!("CARGO_PKG_DESCRIPTION"),
" - ",
env!("CARGO_PKG_HOMEPAGE")
))
.help_message("Print help information")
.version_message("Print version information")
.setting(AppSettings::ColoredHelp)
.setting(AppSettings::TrailingVarArg)
.arg(
Arg::with_name("ARGUMENTS")
.multiple(true)
.help("The recipe(s) to run, defaults to the first recipe in the justfile"),
)
.arg(
Arg::with_name("COLOR")
.long("color")
.takes_value(true)
.possible_values(&["auto", "always", "never"])
.default_value("auto")
.help("Print colorful output"),
)
.arg(
Arg::with_name("DRY-RUN")
.long("dry-run")
.help("Print what just would do without doing it")
.conflicts_with("QUIET"),
)
.arg(
Arg::with_name("DUMP")
.long("dump")
.help("Print entire justfile"),
)
.arg(
Arg::with_name("EDIT")
.short("e")
.long("edit")
.help("Open justfile with $EDITOR"),
)
.arg(
Arg::with_name("EVALUATE")
.long("evaluate")
.help("Print evaluated variables"),
)
.arg(
Arg::with_name("HIGHLIGHT")
.long("highlight")
.help("Highlight echoed recipe lines in bold"),
)
.arg(
Arg::with_name("JUSTFILE")
.short("f")
.long("justfile")
.takes_value(true)
.help("Use <JUSTFILE> as justfile."),
)
.arg(
Arg::with_name("LIST")
.short("l")
.long("list")
.help("List available recipes and their arguments"),
)
.arg(
Arg::with_name("QUIET")
.short("q")
.long("quiet")
.help("Suppress all output")
.conflicts_with("DRY-RUN"),
)
.arg(
Arg::with_name("SET")
.long("set")
.takes_value(true)
.number_of_values(2)
.value_names(&["VARIABLE", "VALUE"])
.multiple(true)
.help("Set <VARIABLE> to <VALUE>"),
)
.arg(
Arg::with_name("SHELL")
.long("shell")
.takes_value(true)
.default_value(DEFAULT_SHELL)
.help("Invoke <SHELL> to run recipes"),
)
.arg(
Arg::with_name("SHOW")
.short("s")
.long("show")
.takes_value(true)
.value_name("RECIPE")
.help("Show information about <RECIPE>"),
)
.arg(
Arg::with_name("SUMMARY")
.long("summary")
.help("List names of available recipes"),
)
.arg(
Arg::with_name("VERBOSE")
.short("v")
.long("verbose")
.multiple(true)
.help("Use verbose output"),
)
.arg(
Arg::with_name("WORKING-DIRECTORY")
.short("d")
.long("working-directory")
.takes_value(true)
.help("Use <WORKING-DIRECTORY> as working directory. --justfile must also be set")
.requires("JUSTFILE"),
)
.group(ArgGroup::with_name("EARLY-EXIT").args(&[
"DUMP",
"EDIT",
"LIST",
"SHOW",
"SUMMARY",
"ARGUMENTS",
"EVALUATE",
]))
.get_matches();
let color = match matches.value_of("COLOR").expect("`--color` had no value") {
"auto" => Color::auto(),
"always" => Color::always(),
"never" => Color::never(),
other => die!(
"Invalid argument `{}` to --color. This is a bug in just.",
other
),
};
let set_count = matches.occurrences_of("SET");
let mut overrides = BTreeMap::new();
if set_count > 0 {
let mut values = matches.values_of("SET").unwrap();
for _ in 0..set_count {
overrides.insert(values.next().unwrap(), values.next().unwrap());
}
}
fn is_override(arg: &&str) -> bool {
arg.chars().skip(1).any(|c| c == '=')
}
let raw_arguments: Vec<&str> = matches
.values_of("ARGUMENTS")
.map(Iterator::collect)
.unwrap_or_default();
for argument in raw_arguments.iter().cloned().take_while(is_override) {
let i = argument
.char_indices()
.skip(1)
.find(|&(_, c)| c == '=')
.unwrap()
.0;
let name = &argument[..i];
let value = &argument[i + 1..];
overrides.insert(name, value);
}
let rest = raw_arguments
.into_iter()
.skip_while(is_override)
.enumerate()
.flat_map(|(i, argument)| {
if i == 0 {
if let Some(i) = argument.rfind('/') {
if matches.is_present("WORKING-DIRECTORY") {
die!("--working-directory and a path prefixed recipe may not be used together.");
}
let (dir, recipe) = argument.split_at(i + 1);
if let Err(error) = env::set_current_dir(dir) {
die!("Error changing directory: {}", error);
}
if recipe.is_empty() {
return None;
} else {
return Some(recipe);
}
}
}
Some(argument)
})
.collect::<Vec<&str>>();
let justfile = matches.value_of("JUSTFILE").map(Path::new);
let mut working_directory = matches.value_of("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) => die!(
"Could not canonicalize justfile path `{}`: {}",
justfile.display(),
err
),
}
}
justfile.pop();
working_directory = Some(justfile);
}
let text;
if let (Some(justfile), Some(directory)) = (justfile, working_directory) {
if matches.is_present("EDIT") {
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) => {
if matches.is_present("EDIT") {
edit(name);
}
text = fs::read_to_string(&name)
.unwrap_or_else(|error| die!("Error reading justfile: {}", error));
let parent = name.parent().unwrap();
if let Err(error) = env::set_current_dir(&parent) {
die!(
"Error changing directory to {}: {}",
parent.display(),
error
);
}
}
Err(search_error) => die!("{}", search_error),
}
}
let justfile = Parser::parse(&text).unwrap_or_else(|error| {
if color.stderr().active() {
die!("{:#}", error);
} else {
die!("{}", error);
}
});
if justfile.deprecated_equals {
let warning = color.warning().stderr();
let message = color.message().stderr();
eprintln!(
"{}",
warning.paint(
"warning: `=` in assignments, exports, and aliases is being phased out on favor of `:=`"
)
);
eprintln!(
"{}",
message
.paint("Please see this issue for more details: https://github.com/casey/just/issues/379")
);
}
if matches.is_present("SUMMARY") {
if justfile.count() == 0 {
eprintln!("Justfile contains no recipes.");
} else {
let summary = justfile
.recipes
.iter()
.filter(|&(_, recipe)| !recipe.private)
.map(|(name, _)| name)
.cloned()
.collect::<Vec<_>>()
.join(" ");
println!("{}", summary);
}
process::exit(EXIT_SUCCESS);
}
if matches.is_present("DUMP") {
println!("{}", justfile);
process::exit(EXIT_SUCCESS);
}
if matches.is_present("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.private {
continue;
}
if !recipe_aliases.contains_key(alias.target) {
recipe_aliases.insert(alias.target, vec![alias.name]);
} else {
let aliases = recipe_aliases.get_mut(alias.target).unwrap();
aliases.push(alias.name);
}
}
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 = 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 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!();
}
}
process::exit(EXIT_SUCCESS);
}
if let Some(name) = matches.value_of("SHOW") {
match justfile.get_recipe(name) {
Some(recipe) => {
println!("{}", recipe);
process::exit(EXIT_SUCCESS);
}
None => {
eprintln!("Justfile does not contain recipe `{}`.", name);
if let Some(suggestion) = justfile.suggest(name) {
eprintln!("Did you mean `{}`?", suggestion);
}
process::exit(EXIT_FAILURE)
}
}
}
let arguments = if !rest.is_empty() {
rest
} 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 {} argument{}.",
recipe.name,
min_arguments,
maybe_s(min_arguments)
);
}
vec![recipe.name]
} else {
die!("Justfile contains no recipes.");
};
let verbosity = Verbosity::from_flag_occurrences(matches.occurrences_of("VERBOSE"));
let configuration = Configuration {
dry_run: matches.is_present("DRY-RUN"),
evaluate: matches.is_present("EVALUATE"),
highlight: matches.is_present("HIGHLIGHT"),
quiet: matches.is_present("QUIET"),
shell: matches.value_of("SHELL").unwrap(),
verbosity,
color,
overrides,
};
if let Err(error) = InterruptHandler::install() {
warn!("Failed to set CTRL-C handler: {}", error)
}
if let Err(run_error) = justfile.run(&invocation_directory, &arguments, &configuration) {
if !configuration.quiet {
if color.stderr().active() {
eprintln!("{:#}", run_error);
} else {
eprintln!("{}", run_error);
}
}
process::exit(run_error.code().unwrap_or(EXIT_FAILURE));
}
}