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3.1 Decompress a tarball while removing a prefix from the paths with E0107 #666

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marc47marc47 opened this issue May 30, 2022 · 1 comment · May be fixed by #669
Open

3.1 Decompress a tarball while removing a prefix from the paths with E0107 #666

marc47marc47 opened this issue May 30, 2022 · 1 comment · May be fixed by #669

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@marc47marc47
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Compiling tar03 v0.1.0 (/Users/marc47/rust/tar03)
error[E0107]: this enum takes 2 generic arguments but 1 generic argument was supplied
--> src/main.rs:8:14
|
8 | fn main() -> Result<()> {
| ^^^^^^ -- supplied 1 generic argument
| |
| expected 2 generic arguments
|
note: enum defined here, with 2 generic parameters: T, E
--> /Users/marc47/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/result.rs:503:10
|
503 | pub enum Result<T, E> {
| ^^^^^^ - -
help: add missing generic argument
|
8 | fn main() -> Result<(), E> {
| +++

For more information about this error, try rustc --explain E0107.
error: could not compile tar03 due to previous error
@marc47marc47
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marc47marc47 commented May 30, 2022 •
edited
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use flate2::read::GzDecoder;
use std::fs::File;
use std::path::PathBuf;
use tar::Archive;

type Result = std::result::Result<T, std::io::Error>; // i add this line to solve this issue

fn main() -> Result<()> {
let file = File::open("archive.tar.gz")?;
let mut archive = Archive::new(GzDecoder::new(file));
let prefix = "bundle/logs";

println!("Extracted the following files:");
archive
    .entries()?
    .filter_map(|e| e.ok())
    .map(|mut entry| -> Result<PathBuf> {
        let path = entry.path()?.strip_prefix(prefix).unwrap().to_owned();
        entry.unpack(&path)?;
        Ok(path)
    })
    .filter_map(|e| e.ok())
    .for_each(|x| println!("> {}", x.display()));

Ok(())

}

@v-i-s-h v-i-s-h linked a pull request Jul 4, 2022 that will close this issue
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Fix 3.1 with correct Result v-i-s-h/rust-cookbook
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@marc47marc47