feat: prompts, dir structure, etc.

pkgr/src/util/mod.rs

@@ -0,0 +1,19 @@
+use std::fs::DirEntry;
+use std::path::Path;
+
+pub mod prompts;
+
+pub fn visit_dirs(dir: &Path, cb: &dyn Fn(&DirEntry)) -> std::io::Result<()> {
+    if dir.is_dir() {
+        for entry in std::fs::read_dir(dir)? {
+            let entry = entry?;
+            let path = entry.path();
+            if path.is_dir() {
+                visit_dirs(&path, cb)?;
+            } else {
+                cb(&entry);
+            }
+        }
+    }
+    Ok(())
+}

pkgr/src/util/prompts.rs

@@ -0,0 +1,32 @@
+use std::io::Write;
+use log::trace;
+
+pub fn is_noninteractive() -> bool {
+    if let Ok(v) = std::env::var("PKGR_NON_INTERACTIVE") {
+        trace!("PKGR_NON_INTERACTIVE={}", v);
+        match v.as_str() {
+            "1" => true,
+            "true" => true,
+            _ => false
+        }
+    } else { false }
+}
+
+pub fn prompt_bool<S: Into<String>>(prompt: S, default: bool) -> bool {
+    if is_noninteractive() { return default; }
+    print!("{} [{}]: ", prompt.into(), if default { "Y/n" } else { "y/N" });
+    match std::io::stdout().flush() {
+        Ok(_) => (),
+        _ => println!()
+    };
+
+    let mut input = String::new();
+    std::io::stdin().read_line(&mut input).expect("Failed to read input.");
+    let answer = input.trim().to_lowercase();
+
+    if answer.is_empty() {
+        default
+    } else {
+        answer == "y" || answer == "yes"
+    }
+}