add zip directory example

Cargo.toml

@@ -18,5 +18,8 @@ podio = "0.1"
 msdos_time = "0.1"
 bzip2 = { version = "0.3", optional = true }
 
+[dev-dependencies]
+walkdir = "1.0"
+
 [features]
 default = ["bzip2"]

examples/write_dir.rs

@@ -0,0 +1,72 @@
+use std::io::prelude::*;
+use zip::write::FileOptions;
+
+use walkdir::WalkDir;
+use std::path::Path;
+use std::fs::File;
+
+extern crate zip;
+extern crate walkdir;
+
+fn main() {
+    std::process::exit(real_main());
+}
+
+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];
+    match doit(src_dir, dst_file) {
+        Ok(_) => println!("done: {} written to {}", src_dir, dst_file),
+        Err(e) => println!("Error: {:?}", e),
+    }
+
+    return 0;
+}
+
+fn doit(src_dir: &str, dst_file: &str) -> zip::result::ZipResult<()> {
+    if !Path::new(src_dir).is_dir() {
+        return Ok(());
+    }
+
+    let path = Path::new(dst_file);
+    let file = File::create(&path).unwrap();
+
+    let mut zip = zip::ZipWriter::new(file);
+
+    let options = FileOptions::default()
+        .compression_method(zip::CompressionMethod::Deflated)
+        .unix_permissions(0o755);
+
+    let walkdir = WalkDir::new(src_dir.to_string());
+
+    let it = walkdir.into_iter();
+
+    for dent in it.filter_map(|e| e.ok()) {
+        let path = dent.path();
+        let name = path.strip_prefix(Path::new(src_dir))
+            .unwrap()
+            .to_str()
+            .unwrap();
+
+
+        if path.is_file() {
+            println!("adding {:?} as {:?} ...", path, name);
+            try!(zip.start_file(name, options));
+            let mut f = File::open(path)?;
+            let mut buffer = Vec::new();
+            f.read_to_end(&mut buffer)?;
+            try!(zip.write_all(&*buffer));
+        }
+    }
+
+    try!(zip.finish());
+
+    Ok(())
+}