globmatch

Rust crate for resolving globs relative to a specified directory. Based on globset and walkdir.

Documentation

https://docs.rs/globmatch

For the documentation of the glob format please refer to

https://docs.rs/globset

Usage

Add this to your Cargo.toml:

[dependencies]
globmatch = "0.3"

Examples and concept

For CLI utilities it can be a common pattern to operate on a set of files. Such a set of files is either provided directly, as parameter to the tool - or via configuration files.

The use of a configuration file makes it easier to determine the location of a file since the path can be specified relative to the configuration. Consider, e.g., the following .json input:

{
  "globs": [
    "../../../some/text-files/**/*.txt",
    "other/inputs/*.md",
    "paths/from/dir[0-9]/*.*"
  ]
}

Specifying these paths in a dedicated configuration file allows to resolve the paths independent of the invocation of the script operating on these files, the location of the configuration file is used as base directory. This crate combines the features of the existing crates globset and walkdir to implement a relative glob matcher.

Example: A simple match.

The following example uses the files stored in the test-files/c-simple folder, we're trying to match all the .txt files using the glob test-files/c-simple/**/*.txt (where test-files/c-simple is the only relative path component).

/*
    Example files:
    globmatch/test-files/c-simple/.hidden
    globmatch/test-files/c-simple/.hidden/h_1.txt
    globmatch/test-files/c-simple/.hidden/h_0.txt
    globmatch/test-files/c-simple/a/a2/a2_0.txt
    globmatch/test-files/c-simple/a/a0/a0_0.txt
    globmatch/test-files/c-simple/a/a0/a0_1.txt
    globmatch/test-files/c-simple/a/a0/A0_3.txt
    globmatch/test-files/c-simple/a/a0/a0_2.md
    globmatch/test-files/c-simple/a/a1/a1_0.txt
    globmatch/test-files/c-simple/some_file.txt
    globmatch/test-files/c-simple/b/b_0.txt
 */

use globmatch;

fn example_a() -> Result<(), String> {
    let builder = globmatch::Builder::new("test-files/c-simple/**/*.txt")
        .build(env!("CARGO_MANIFEST_DIR"))?;

    let paths: Vec<_> = builder.into_iter()
        .flatten()
        .collect();

    println!(
        "paths:\n{}",
        paths
            .iter()
            .map(|p| format!("{}", p.to_string_lossy()))
            .collect::<Vec<_>>()
            .join("\n")
    );

    assert_eq!(6 + 2 + 1, paths.len());
    Ok(())
}

example_a().unwrap();

Example: Specifying options and using .filter_entry.

Similar to the builder pattern in globset when using globset::GlobBuilder, this crate allows to pass options (currently just case sensitivity) to the builder.

In addition, the filter_entry function from walkdir is accessible, but only as a single call (this crate does not implement a recursive iterator). This function allows filter files and folders before matching against the provided glob and therefore to efficiently exclude files and folders, e.g., hidden folders:

use globmatch;

fn example_b() -> Result<(), String> {
   let root = env!("CARGO_MANIFEST_DIR");
   let pattern = "test-files/c-simple/**/[ah]*.txt";

   let builder = globmatch::Builder::new(pattern)
       .case_sensitive(true)
       .build(root)?;

   let paths: Vec<_> = builder
       .into_iter()
       .filter_entry(|p| !globmatch::is_hidden_entry(p))
       .flatten()
       .collect();

   assert_eq!(4, paths.len());
   Ok(())
}

example_b().unwrap();