Add support for running commands on key press (#566)

Based on option `command` in key binding section in config, e.g.

    - { key: N,        mods: Control|Shift,    command: alacritty }
    # or
    - {
        key: N,
        mods: Control|Shift,
        command: {
          program: "alacritty",
          args: ["-e", "vttest"],
    }}

specified command will be run in the background on key press. Alacritty
doesn't wait for its result nor block IO.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/input.rs b/src/input.rs
index a1bd5c9a..47374e47 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -20,6 +20,7 @@
 //! determine what to do when a non-modifier key is pressed.
 use std::borrow::Cow;
 use std::mem;
+use std::process::Command;
 use std::time::Instant;
 
 use copypasta::{Clipboard, Load, Buffer};
@@ -144,6 +145,9 @@ pub enum Action {
     /// Paste contents of selection buffer
     PasteSelection,
 
+    /// Run given command
+    Command(String, Vec<String>),
+
     /// Quits Alacritty.
     Quit,
 }
@@ -174,6 +178,17 @@ impl Action {
                         warn!("Error loading data from clipboard. {}", Red(err));
                     });
             },
+            Action::Command(ref program, ref args) => {
+                trace!("running command: {} {:?}", program, args);
+                match Command::new(program).args(args).spawn() {
+                    Ok(child) => {
+                        debug!("spawned new proc with pid: {}", child.id());
+                    },
+                    Err(err) => {
+                        warn!("couldn't run command: {}", err);
+                    },
+                }
+            },
             Action::Quit => {
                 // FIXME should do a more graceful shutdown
                 ::std::process::exit(0);