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use clap::{App, Arg, Error};
use error;
use std::{
ffi::OsString,
fs::canonicalize,
path::{PathBuf, MAIN_SEPARATOR},
process::Command,
};
#[derive(Clone, Debug)]
pub struct Args {
pub cmd: Vec<String>,
pub paths: Vec<PathBuf>,
pub filters: Vec<String>,
pub ignores: Vec<String>,
pub clear_screen: bool,
pub signal: Option<String>,
pub restart: bool,
pub debounce: u64,
pub debug: bool,
pub run_initially: bool,
pub no_shell: bool,
pub no_vcs_ignore: bool,
pub once: bool,
pub poll: bool,
pub poll_interval: u32,
}
#[cfg(target_family = "windows")]
pub fn clear_screen() {
let _ = Command::new("cmd")
.arg("/c")
.arg("tput reset || cls")
.status();
}
#[cfg(target_family = "unix")]
pub fn clear_screen() {
let _ = Command::new("tput").arg("reset").status();
}
pub fn get_args() -> error::Result<Args> {
get_args_impl(None::<&[&str]>)
}
pub fn get_args_from<I, T>(from: I) -> error::Result<Args>
where
I: IntoIterator<Item = T>,
T: Into<OsString> + Clone,
{
get_args_impl(Some(from))
}
fn get_args_impl<I, T>(from: Option<I>) -> error::Result<Args>
where
I: IntoIterator<Item = T>,
T: Into<OsString> + Clone,
{
let app = App::new("watchexec")
.version(crate_version!())
.about("Execute commands when watched files change")
.arg(Arg::with_name("command")
.help("Command to execute")
.multiple(true)
.required(true))
.arg(Arg::with_name("extensions")
.help("Comma-separated list of file extensions to watch (js,css,html)")
.short("e")
.long("exts")
.takes_value(true))
.arg(Arg::with_name("path")
.help("Watch a specific directory")
.short("w")
.long("watch")
.number_of_values(1)
.multiple(true)
.takes_value(true))
.arg(Arg::with_name("clear")
.help("Clear screen before executing command")
.short("c")
.long("clear"))
.arg(Arg::with_name("restart")
.help("Restart the process if it's still running")
.short("r")
.long("restart"))
.arg(Arg::with_name("signal")
.help("Send signal to process upon changes, e.g. SIGHUP")
.short("s")
.long("signal")
.takes_value(true)
.number_of_values(1)
.value_name("signal"))
.arg(Arg::with_name("kill")
.help("Send SIGKILL to child processes (deprecated, use -s SIGKILL instead)")
.short("k")
.long("kill"))
.arg(Arg::with_name("debounce")
.help("Set the timeout between detected change and command execution, defaults to 500ms")
.takes_value(true)
.value_name("milliseconds")
.short("d")
.long("debounce"))
.arg(Arg::with_name("verbose")
.help("Print debugging messages to stderr")
.short("v")
.long("verbose"))
.arg(Arg::with_name("filter")
.help("Ignore all modifications except those matching the pattern")
.short("f")
.long("filter")
.number_of_values(1)
.multiple(true)
.takes_value(true)
.value_name("pattern"))
.arg(Arg::with_name("ignore")
.help("Ignore modifications to paths matching the pattern")
.short("i")
.long("ignore")
.number_of_values(1)
.multiple(true)
.takes_value(true)
.value_name("pattern"))
.arg(Arg::with_name("no-vcs-ignore")
.help("Skip auto-loading of .gitignore files for filtering")
.long("no-vcs-ignore"))
.arg(Arg::with_name("no-default-ignore")
.help("Skip auto-ignoring of commonly ignored globs")
.long("no-default-ignore"))
.arg(Arg::with_name("postpone")
.help("Wait until first change to execute command")
.short("p")
.long("postpone"))
.arg(Arg::with_name("poll")
.help("Forces polling mode")
.long("force-poll")
.value_name("interval"))
.arg(Arg::with_name("no-shell")
.help("Do not wrap command in 'sh -c' resp. 'cmd.exe /C'")
.short("n")
.long("no-shell"))
.arg(Arg::with_name("once").short("1").hidden(true));
let args = match from {
None => app.get_matches(),
Some(i) => app.get_matches_from(i),
};
let cmd: Vec<String> = values_t!(args.values_of("command"), String)?;
let str_paths = values_t!(args.values_of("path"), String).unwrap_or(vec![".".into()]);
let mut paths = vec![];
for path in str_paths {
paths.push(canonicalize(&path).map_err(|e| error::Error::Canonicalization(path, e))?);
}
let signal = if args.is_present("kill") {
Some("SIGKILL".to_string())
} else {
args.value_of("signal").map(str::to_string)
};
let mut filters = values_t!(args.values_of("filter"), String).unwrap_or(Vec::new());
if let Some(extensions) = args.values_of("extensions") {
for exts in extensions {
filters.extend(
exts.split(',')
.filter(|ext| !ext.is_empty())
.map(|ext| format!("*.{}", ext.replace(".", ""))),
);
}
}
let mut ignores = vec![];
let default_ignores = vec![
format!("**{}.DS_Store", MAIN_SEPARATOR),
String::from("*.py[co]"),
String::from("#*#"),
String::from(".#*"),
String::from(".*.sw?"),
String::from(".*.sw?x"),
format!("**{}.git{}**", MAIN_SEPARATOR, MAIN_SEPARATOR),
format!("**{}.hg{}**", MAIN_SEPARATOR, MAIN_SEPARATOR),
format!("**{}.svn{}**", MAIN_SEPARATOR, MAIN_SEPARATOR),
];
if args.occurrences_of("no-default-ignore") == 0 {
ignores.extend(default_ignores)
};
ignores.extend(values_t!(args.values_of("ignore"), String).unwrap_or(Vec::new()));
let poll_interval = if args.occurrences_of("poll") > 0 {
value_t!(args.value_of("poll"), u32).unwrap_or_else(|e| e.exit())
} else {
1000
};
let debounce = if args.occurrences_of("debounce") > 0 {
value_t!(args.value_of("debounce"), u64).unwrap_or_else(|e| e.exit())
} else {
500
};
if signal.is_some() && args.is_present("postpone") {
Error::value_validation_auto("--postpone and --signal are mutually exclusive".to_string())
.exit();
}
if signal.is_some() && args.is_present("kill") {
Error::value_validation_auto("--kill and --signal is ambiguous.\n Hint: Use only '--signal SIGKILL' without --kill".to_string())
.exit();
}
Ok(Args {
cmd: cmd,
paths: paths,
filters: filters,
ignores: ignores,
signal: signal,
clear_screen: args.is_present("clear"),
restart: args.is_present("restart"),
debounce: debounce,
debug: args.is_present("verbose"),
run_initially: !args.is_present("postpone"),
no_shell: args.is_present("no-shell"),
no_vcs_ignore: args.is_present("no-vcs-ignore"),
once: args.is_present("once"),
poll: args.occurrences_of("poll") > 0,
poll_interval: poll_interval,
})
}