Remove jq dependency from sway_tree script

bin/sway_tree.rs

@@ -23,42 +23,35 @@
 //     └───> [Alacritty]
 
 use std::io::{self, BufRead, BufReader};
-use std::process::{Command, Stdio, ChildStdout};
+use std::process::{Command, Stdio};
+use std::cmp::min;
 
 fn main() {
-    let sway_tree = match get_tree() {
-        Ok(tree) => BufReader::new(tree).lines().map(|l| l.unwrap()),
-        Err(e) => panic!("Failed to get sway tree: {}", e),
-    };
+    let sway_tree = get_tree().expect("Failed to get sway tree");
 
-    for (i, line) in sway_tree.enumerate() {
+    for (i, line) in sway_tree.iter().enumerate() {
         println!("Workspace {} :: {}", i+1, line);
-        println!("{}", ParserTree::from(&line).format());
+        println!("{}", ParserTree::from(line).format());
     }
 }
 
-fn get_tree() -> io::Result<ChildStdout> {
+fn get_tree() -> io::Result<Vec<String>> {
     let swaymsg = Command::new("swaymsg")
         .arg("-t")
         .arg("get_tree")
         .stdout(Stdio::piped())
         .spawn()?;
 
-    let jq = Command::new("jq")
-        .arg(".nodes[1].nodes[].representation")
-        .stdin(swaymsg.stdout.unwrap())
-        .stdout(Stdio::piped())
-        .spawn()
-        .expect("`jq` binary is not available");
+    let swaymsg_out = swaymsg.stdout.expect("Swaymsg didn't return window tree");
 
-    let tr = Command::new("tr")
-        .arg("-d")
-        .arg("\"")
-        .stdin(jq.stdout.unwrap())
-        .stdout(Stdio::piped())
-        .spawn()?;
+    let repr: Vec<String> = BufReader::new(swaymsg_out)
+        .lines()
+        .map(|l| l.unwrap().trim().to_string())
+        .filter(|l| &l[..min(16, l.len())] == "\"representation\"")
+        .map(|l| l[19..l.len()-1].to_string())
+        .collect();
 
-    Ok(tr.stdout.unwrap())
+    Ok(repr)
 }
 
 

notes/shell/ssh_port_forwarding.md

@@ -13,14 +13,21 @@ Some key terms:
 
 The opens an ssh tunnel without obstructing the current terminal:
 ```bash
-    ssh -p10011 -NL 7000:localhost:8080 emiliko@localhost &
+    ssh -NL 8001:localhost:7000 emiliko@cs.ox.ac.uk &
     ssh -NL <client-port>:<url-from-host>:<host-port> <user>@<host-address> &
 ```
 
 # In config file
-The syntax in the config is quite similar
+The syntax in the `~/.ssh/config` is quite similar
 
 ```ssh
+Host mirrorside
+    User emiliko
+    Hostname cs.ox.ac.uk
     LocalForward 8001 localhost:7000
+```
+
+The general format looks like
+```ssh
     LocalForward <client-port> <host-address>:<host-port>
 ```

post_install.sh

@@ -36,6 +36,7 @@ configs_pointer_is_setup() {
 swayland_checks() {
   check_sway_wallpaper
   check_swaylock_wallpaper
+  check_swaytree_compilation
 }
 
 check_sway_wallpaper() {
@@ -71,6 +72,25 @@ check_swaylock_wallpaper() {
   return $return_code
 }
 
+check_swaytree_compilation() {
+  local src=~/.configs_pointer/bin/sway_tree.rs
+  local exe="${src%.*}"
+
+  if [[ -x "$exe" ]]; then
+    return 0
+  elif command -v rustc &>/dev/null; then
+    rustc -C opt-level=3 "$src" -o "$exe"
+  fi
+
+  if ! [[ -x "$exe" ]]; then
+    printf "ERR: Uncompiled sway_tree.rs script\n"
+    printf "\tInstall a rust compiler and rerun this script\n"
+    return 1
+  fi
+
+  return 0
+}
+
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