Prelim changes to write_dir

Remove old code and fix match statement

Edit arg names and use PathBuf and Path

Fix path ordering

Fix enum names

Add clap as a dev dependency

Pin clap version

Cargo.toml

@@ -32,6 +32,7 @@ bencher = "0.1.5"
 getrandom = "0.2.5"
 walkdir = "2.3.2"
 time = { version = "0.3.7", features = ["formatting", "macros"] }
+clap = { version = "=4.4.18", features = ["derive"] }
 
 [features]
 aes-crypto = [ "aes", "constant_time_eq", "hmac", "pbkdf2", "sha1" ]

examples/write_dir.rs

@@ -1,3 +1,4 @@
+use clap::{Parser, ValueEnum};
 use std::io::prelude::*;
 use std::io::{Seek, Write};
 use std::iter::Iterator;
@@ -5,58 +6,90 @@ use zip::result::ZipError;
 use zip::write::FileOptions;
 
 use std::fs::File;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use walkdir::{DirEntry, WalkDir};
 
+#[derive(Parser)]
+#[command(about, long_about = None)]
+struct Args {
+    // Source directory
+    source: PathBuf,
+    // Destination zipfile 
+    destination: PathBuf,
+    // Compression method 
+    #[arg(value_enum)]
+    compression_method: CompressionMethod,
+}
+
+#[derive(Clone, ValueEnum)]
+enum CompressionMethod {
+    Stored,
+    Deflated,
+    DeflatedMiniz,
+    DeflatedZlib,
+    Bzip2,
+    Zstd,
+}
+
 fn main() {
     std::process::exit(real_main());
 }
 
-const METHOD_STORED: Option<zip::CompressionMethod> = Some(zip::CompressionMethod::Stored);
-
-#[cfg(any(
-    feature = "deflate",
-    feature = "deflate-miniz",
-    feature = "deflate-zlib"
-))]
-const METHOD_DEFLATED: Option<zip::CompressionMethod> = Some(zip::CompressionMethod::Deflated);
-#[cfg(not(any(
-    feature = "deflate",
-    feature = "deflate-miniz",
-    feature = "deflate-zlib"
-)))]
-const METHOD_DEFLATED: Option<zip::CompressionMethod> = None;
-
-#[cfg(feature = "bzip2")]
-const METHOD_BZIP2: Option<zip::CompressionMethod> = Some(zip::CompressionMethod::Bzip2);
-#[cfg(not(feature = "bzip2"))]
-const METHOD_BZIP2: Option<zip::CompressionMethod> = None;
-
-#[cfg(feature = "zstd")]
-const METHOD_ZSTD: Option<zip::CompressionMethod> = Some(zip::CompressionMethod::Zstd);
-#[cfg(not(feature = "zstd"))]
-const METHOD_ZSTD: Option<zip::CompressionMethod> = None;
-
 fn real_main() -> i32 {
-    let args: Vec<_> = std::env::args().collect();
-    if args.len() < 3 {
-        println!(
-            "Usage: {} <source_directory> <destination_zipfile>",
-            args[0]
-        );
-        return 1;
-    }
-
-    let src_dir = &*args[1];
-    let dst_file = &*args[2];
-    for &method in [METHOD_STORED, METHOD_DEFLATED, METHOD_BZIP2, METHOD_ZSTD].iter() {
-        if method.is_none() {
-            continue;
-        }
-        match doit(src_dir, dst_file, method.unwrap()) {
-            Ok(_) => println!("done: {src_dir} written to {dst_file}"),
-            Err(e) => println!("Error: {e:?}"),
+    let args = Args::parse();
+    let src_dir = &args.source;
+    let dst_file = &args.destination;
+    let method = match args.compression_method {
+        CompressionMethod::Stored => zip::CompressionMethod::Stored,
+        CompressionMethod::Deflated => {
+            #[cfg(not(feature = "deflate"))]
+            {
+                println!("The `deflate` feature is not enabled");
+                return 1;
+            }
+            #[cfg(feature = "deflate")]
+            zip::CompressionMethod::Deflated
+        },
+        CompressionMethod::DeflatedMiniz => {
+            #[cfg(not(feature = "deflate-miniz"))]
+            {
+                println!("The `deflate-miniz` feature is not enabled");
+                return 1;
+            }
+            #[cfg(feature = "deflate-miniz")]
+            zip::CompressionMethod::Deflated
+        },
+        CompressionMethod::DeflatedZlib => {
+            #[cfg(not(feature = "deflate-zlib"))]
+            {
+                println!("The `deflate-zlib` feature is not enabled");
+                return 1;
+            }
+            #[cfg(feature = "deflate-zlib")]
+            zip::CompressionMethod::Deflated
+        },
+        CompressionMethod::Bzip2 => {
+            #[cfg(not(feature = "bzip2"))]
+            {
+                println!("The `bzip2` feature is not enabled");
+                return 1;
+            }
+            #[cfg(feature = "bzip2")]
+            zip::CompressionMethod::Bzip2
+        },
+        CompressionMethod::Zstd => {
+            #[cfg(not(feature = "zstd"))]
+            {
+                println!("The `zstd` feature is not enabled");
+                return 1;
+            }
+            #[cfg(feature = "zstd")]
+            zip::CompressionMethod::Zstd
         }
+    };
+    match doit(src_dir, dst_file, method) {
+        Ok(_) => println!("done: {:?} written to {:?}", src_dir, dst_file),
+        Err(e) => println!("Error: {e:?}"),
     }
 
     0
@@ -64,7 +97,7 @@ fn real_main() -> i32 {
 
 fn zip_dir<T>(
     it: &mut dyn Iterator<Item = DirEntry>,
-    prefix: &str,
+    prefix: &Path,
     writer: T,
     method: zip::CompressionMethod,
 ) -> zip::result::ZipResult<()>
@@ -105,8 +138,8 @@ where
 }
 
 fn doit(
-    src_dir: &str,
-    dst_file: &str,
+    src_dir: &Path,
+    dst_file: &Path,
     method: zip::CompressionMethod,
 ) -> zip::result::ZipResult<()> {
     if !Path::new(src_dir).is_dir() {