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#[macro_use] extern crate failure;
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extern crate xdg_desktop;
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use failure::Error;
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use xdg_desktop::{DesktopEntry, EntryType};
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use std::io::{Write};
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use std::process::{self,exit,Command,Stdio};
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use std::os::unix::process::CommandExt;
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fn ensure_dmenu() -> Result<(), Error> {
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let _ = Command::new("which")
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.args(&["dmenu"])
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.output()
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.map_err(|_| format_err!("could not find `dmenu'"))?;
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Ok(())
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}
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/// Given a list of strings, we provide them to dmenu and return back
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/// the one which the user chose (or an empty string, if the user
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/// chose nothing)
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fn dmenu_choose<'a, I>(choices: I) -> Result<String, Error>
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where I: Iterator<Item=&'a String>
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{
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let mut dmenu = Command::new("dmenu")
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.args(&["-i", "-l", "10"])
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.stdin(Stdio::piped())
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.stdout(Stdio::piped())
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.spawn()?;
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{
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let stdin = dmenu.stdin.as_mut().unwrap();
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for c in choices.into_iter() {
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stdin.write(c.as_bytes())?;
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stdin.write(b"\n")?;
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}
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}
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let output = dmenu.wait_with_output()?;
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Ok(String::from_utf8(output.stdout)?.trim().to_owned())
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}
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fn is_not_metavar(s: &&str) -> bool {
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!(s.starts_with("%") && s.len() == 2)
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}
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fn run_command(cmd: &Option<String>) -> Result<(), Error> {
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println!("runnin");
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if let &Some(ref cmd) = cmd {
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let mut iter = cmd.split_whitespace();
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process::Command::new(iter.next().unwrap())
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.args(iter.filter(is_not_metavar))
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.exec();
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} else {
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Err(format_err!("No command specified in file!"))?;
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}
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Ok(())
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}
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fn run() -> Result<(), Error> {
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ensure_dmenu()?;
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let mut entries = Vec::new();
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for f in std::fs::read_dir("/usr/share/applications")? {
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let f = f?;
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if f.file_type()?.is_file() && f.path().extension().map_or(false, |e| e == "desktop") {
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let mut f = std::fs::File::open(f.path())?;
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match xdg_desktop::DesktopEntry::from_file(&mut f) {
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Ok(e) => if e.is_application() {
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entries.push(e);
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},
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_ => (),
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}
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}
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}
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let choice = dmenu_choose(entries.iter()
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.map(|e| &e.info.name))?;
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println!("Choice is {}", choice);
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match entries.iter().find(|e| e.info.name == choice) {
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Some(&DesktopEntry {
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typ: EntryType::Application(ref app),
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info: _,
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}) => run_command(&app.exec)?,
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_ => (),
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}
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Ok(())
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}
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fn main() {
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if let Err(e) = run() {
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eprintln!("Error running dmesktop: {}", e);
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exit(99);
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}
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}
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