Refactor tips (#575)

* refactor: Move all get_random_tip functionality to its own function

* fix: Only depend on rand when building the tips feature

tui/Cargo.toml

@@ -7,17 +7,12 @@ edition = "2021"
 license.workspace = true
 repository = "https://github.com/ChrisTitusTech/linutil/tree/main/tui"
 version.workspace = true
-include = [
-    "src/*.rs",
-    "Cargo.toml",
-    "build.rs",
-    "cool_tips.txt",
-]
+include = ["src/*.rs", "Cargo.toml", "build.rs", "cool_tips.txt"]
 build = "build.rs"
 
 [features]
 default = ["tips"]
-tips = []
+tips = ["rand"]
 
 [dependencies]
 clap = { version = "4.5.16", features = ["derive"] }
@@ -28,7 +23,7 @@ portable-pty = "0.8.1"
 ratatui = "0.28.1"
 tui-term = "0.1.12"
 unicode-width = "0.1.13"
-rand =  "0.8.5"
+rand = { version = "0.8.5", optional = true }
 linutil_core = { path = "../core", version = "24.9.19" }
 
 [build-dependencies]

tui/src/state.rs

@@ -74,7 +74,7 @@ impl AppState {
             selected_commands: Vec::new(),
             drawable: false,
             #[cfg(feature = "tips")]
-            tip: get_random_line(include_str!("../cool_tips.txt").lines().collect()),
+            tip: get_random_tip(),
         };
         state.update_items();
         state
@@ -543,12 +543,16 @@ impl AppState {
 }
 
 #[cfg(feature = "tips")]
-fn get_random_line(lines: Vec<&str>) -> &str {
-    if lines.is_empty() {
+const TIPS: &str = include_str!("../cool_tips.txt");
+
+#[cfg(feature = "tips")]
+fn get_random_tip() -> &'static str {
+    let tips: Vec<&str> = TIPS.lines().collect();
+    if tips.is_empty() {
         return "";
     }
 
     let mut rng = rand::thread_rng();
-    let random_index = rng.gen_range(0..lines.len());
-    lines[random_index]
+    let random_index = rng.gen_range(0..tips.len());
+    tips[random_index]
 }