Embed the res directory in the binary

...and extract to a temporary directory when needed (if
`PARROTD_RESOURCE_DIR` is not defined)

Cargo.lock

@@ -144,6 +144,15 @@ version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
 
+[[package]]
+name = "fastrand"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+dependencies = [
+ "instant",
+]
+
 [[package]]
 name = "field-offset"
 version = "0.3.4"
@@ -420,6 +429,34 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "include_dir"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18762faeff7122e89e0857b02f7ce6fcc0d101d5e9ad2ad7846cc01d61b7f19e"
+dependencies = [
+ "include_dir_macros",
+]
+
+[[package]]
+name = "include_dir_macros"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b139284b5cf57ecfa712bcc66950bb635b31aff41c188e8a4cfc758eca374a3f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+]
+
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "libappindicator"
 version = "0.7.1"
@@ -544,8 +581,10 @@ dependencies = [
  "alphanumeric-sort",
  "glib",
  "gtk",
+ "include_dir",
  "libappindicator",
  "sysinfo",
+ "tempfile",
 ]
 
 [[package]]
@@ -652,6 +691,24 @@ dependencies = [
  "num_cpus",
 ]
 
+[[package]]
+name = "redox_syscall"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "remove_dir_all"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "rustc_version"
 version = "0.3.3"
@@ -745,6 +802,20 @@ dependencies = [
  "version-compare",
 ]
 
+[[package]]
+name = "tempfile"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cdb1ef4eaeeaddc8fbd371e5017057064af0911902ef36b39801f67cc6d79e4"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "libc",
+ "redox_syscall",
+ "remove_dir_all",
+ "winapi",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.37"

Cargo.toml

@@ -11,3 +11,5 @@ gtk = "0.15"
 glib = "0.15"
 sysinfo = "0.26"
 alphanumeric-sort = "1.4"
+include_dir = "0.7"
+tempfile = "3"

src/main.rs

@@ -10,6 +10,9 @@ use pack::*;
 use std::cell::RefCell;
 use std::time::{Duration, Instant};
 use sysinfo::*;
+use include_dir::{include_dir, Dir};
+
+static EMBEDDED_RES: Dir<'_> = include_dir!("$CARGO_MANIFEST_DIR/res");
 
 thread_local! {
     static SYSTEM: RefCell<System> = RefCell::new(System::new_all());
@@ -45,7 +48,14 @@ fn init_indicator(icon_pack: &IconPack) -> AppIndicator {
 fn main() {
     gtk::init().unwrap();
 
-    let res_dir = std::env::var("PARROTD_RESOURCE_DIR").unwrap_or("./res".to_owned());
+    let tmp_dir = tempfile::tempdir();
+
+    let _tmp_dir = tmp_dir.as_ref();
+    let res_dir = std::env::var("PARROTD_RESOURCE_DIR").unwrap_or_else(|_| {
+        let tmp_dir = _tmp_dir.expect("Cannot create temporary directory");
+        EMBEDDED_RES.extract(tmp_dir.path()).unwrap();
+        tmp_dir.path().to_str().unwrap().to_string()
+    });
     let pack_name = std::env::var("PARROTD_ICON_PACK").unwrap_or("parrot".to_owned());
     let variant = PackVariant::parse(
         &std::env::var("PARROTD_VARIANT").unwrap_or("dark".to_owned())).expect("Invalid variant name");
@@ -75,4 +85,8 @@ fn main() {
     });
 
     gtk::main();
+
+    if let Ok(tmp_dir) = tmp_dir {
+        tmp_dir.close().unwrap();
+    }
 }