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Oystein Kristoffer Tveit 2024-02-11 19:44:45 +01:00
commit f6dac0b2fc
Signed by: oysteikt
GPG Key ID: 9F2F7D8250F35146
9 changed files with 872 additions and 0 deletions

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/target
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[package]
name = "polyglot-zipper"
version = "1.0.0"
edition = "2021"
[dependencies]
anyhow = "1.0.79"
clap = { version = "4.5.0", features = ["derive"] }
iconv = "0.1.1"
zip = "0.6.6"
[[bin]]
name = "polyzip"
path = "src/main.rs"

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MIT License
Copyright (c) 2024 h7x4
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# polyglot-zip
This is a small utility that uses [libiconv](https://www.gnu.org/software/libiconv/) to convert filenames within a zipfile.
It can be useful if a zip has been created on a system that did not use UTF-8 for its filenames.

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{
"nodes": {
"nixpkgs": {
"locked": {
"lastModified": 1707546158,
"narHash": "sha256-nYYJTpzfPMDxI8mzhQsYjIUX+grorqjKEU9Np6Xwy/0=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "d934204a0f8d9198e1e4515dd6fec76a139c87f0",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"root": {
"inputs": {
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

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{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
};
outputs = { self, nixpkgs }: let
supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
forAllSystems = f: nixpkgs.lib.genAttrs supportedSystems (system: f system nixpkgs.legacyPackages.${system});
in {
devShells = forAllSystems (system: pkgs: {
default = let
rustPlatform = pkgs.rust.packages.stable.rustPlatform;
in pkgs.mkShell {
packages = with pkgs; [
cargo
clippy
rust-analyzer
rustc
rustfmt
];
RUST_SRC_PATH = "${rustPlatform.rustLibSrc}";
};
});
packages = (forAllSystems (system: pkgs: {
default = pkgs.rustPlatform.buildRustPackage rec {
pname = "polyglot-zip";
version = (pkgs.lib.importTOML ./Cargo.toml).package.version;
src = ./.;
cargoSha256 = "sha256-3oHEH6DlooWg0sQ+oIvsYoU6FAs7gP9PRwv1xJjGDYA=";
meta = with pkgs.lib; {
description = "A tool to convert and extract zip files with non-UTF-8 contents";
homepage = "https://github.com/h7x4/polyglot-zip";
license = licenses.mit;
platforms = supportedSystems;
};
};
}));
};
}

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use anyhow::Context;
use clap::{Parser, Subcommand};
use iconv::decode;
use std::{fs::File, path::PathBuf};
use zip::{ZipArchive, ZipWriter};
/// A small utility to convert the file names in a zip file from one encoding to another.
///
/// The input encoding is specified as a string, which is passed to the iconv library.
/// The output encoding is always UTF-8.
#[derive(Parser)]
#[clap(name = "polyzip", version, about)]
struct Args {
/// The encoding of the file names in the zip file.
/// A list of supported encodings can be found at https://www.gnu.org/software/libiconv/
#[arg(index = 1)]
input_encoding: String,
#[command(subcommand)]
subcommand: Command,
}
#[derive(Subcommand)]
enum Command {
/// List the converted filenames in the zip file
List {
/// A path to a zip file
#[arg(index = 1)]
file: PathBuf,
},
/// Convert the filenames in the zip file and write the result to a new file
Convert {
/// A path to a zip file
#[arg(index = 1)]
file: PathBuf,
/// Where to put the new zip file
#[arg(short, long)]
output: PathBuf,
},
/// Convert the filenames in the zip file in place
ConvertInPlace {
/// A path to a zip file
#[arg(index = 1)]
file: PathBuf,
/// Whether to create a backup of the original file, with a .bak extension
#[arg(short, long, default_value = "true")]
create_backup: bool,
},
}
fn main() -> anyhow::Result<()> {
let args: Args = Args::parse();
match args.subcommand {
Command::List { file } => {
let zipfile = File::open(&file).context(format!("Failed to open {:?}", file))?;
list_zip_contents(zipfile, &args.input_encoding)?;
}
Command::Convert { file, output } => {
let zipfile = File::open(&file).context(format!("Failed to open {:?}", file))?;
let new_zipfile =
File::create(&output).context(format!("Failed to create {:?}", output))?;
unzip(zipfile, new_zipfile, &args.input_encoding)?;
}
Command::ConvertInPlace {
file,
create_backup,
} => {
let backup_path = &file.with_extension(
file.extension()
.and_then(|ext| ext.to_str())
.unwrap_or("")
.to_string()
+ ".bak",
);
std::fs::rename(&file, backup_path)?;
let zipfile = File::open(&file).context(format!("Failed to open {:?}", file))?;
let new_zipfile =
File::create(&file).context(format!("Failed to create {:?}", file))?;
if let Err(e) = unzip(zipfile, new_zipfile, &args.input_encoding) {
std::fs::rename(backup_path, file)?;
anyhow::bail!(e)
} else if !create_backup {
std::fs::remove_file(backup_path)?;
}
}
}
Ok(())
}
fn list_zip_contents(zipfile: File, input_encoding: &str) -> anyhow::Result<()> {
let mut zip = ZipArchive::new(zipfile)?;
for i in 0..zip.len() {
let file = zip.by_index(i)?;
let name = file.name_raw();
match decode(name, input_encoding) {
Ok(converted_name) => {
println!("{} -> {}", String::from_utf8_lossy(name), converted_name)
}
Err(e) => eprintln!("{}: {}", String::from_utf8_lossy(name), e),
}
}
Ok(())
}
fn unzip(zipfile: File, new_zipfile: File, input_encoding: &str) -> anyhow::Result<()> {
let mut zip = ZipArchive::new(zipfile)?;
let mut builder = ZipWriter::new(new_zipfile);
for i in 0..zip.len() {
let file = zip.by_index(i)?;
let name = file.name_raw().to_vec();
let converted_name = decode(&name, input_encoding)?;
builder.raw_copy_file_rename(file, converted_name)?;
}
builder.finish()?;
Ok(())
}