1 unstable release
0.1.0 | Sep 10, 2024 |
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#3 in #rustyline
22 downloads per month
11KB
118 lines
FileHelper for Rustyline
A Rust library that extends rustyline
, a readline-like library in Rust, by providing a FileHelper
for filename completion, file extension validation, and path-based validation with optional highlighting.
Features
- Filename Completion: Automatically complete file and directory names in the current context using
FilenameCompleter
fromrustyline
. - Allowed Extensions: You can specify a list of allowed file extensions. If no extensions are provided, all files are considered valid.
- Highlighting: Provides custom highlighting of file paths, directories, and invalid paths.
- Directories: Highlighted in blue.
- Valid Files: Highlighted in green.
- Invalid Files: Highlighted in red.
- Path Validation: Expands tilde (
~
) for the home directory and checks for valid files and directories. - Command Support: Built-in validation for basic shell commands such as
cd
,pwd
,ls
, etc.
Usage
Installation
Add the following to your Cargo.toml
:
[dependencies]
rustyline = "9.0"
anyhow = "1.0"
Example
Here is an example of how to use FileHelper
with rustyline
:
use anyhow::Result;
use rustyline::{Editor};
use my_file_helper::setup_editor;
fn main() -> Result<()> {
// Specify allowed file extensions (optional)
let allowed_extensions = Some(vec!["txt".to_string(), "rs".to_string()]);
// Setup editor with file completion and validation
let mut rl = setup_editor(allowed_extensions)?;
loop {
let readline = rl.readline("> ");
match readline {
Ok(line) => {
if line == "exit" {
break;
}
println!("Line: {}", line);
},
Err(err) => {
eprintln!("Error: {:?}", err);
break;
}
}
}
Ok(())
}
Features Breakdown
Filename Completion
FileHelper
uses rustyline::completion::FilenameCompleter
to provide filename autocompletion based on the user's input. This helps in command-line applications where users need to select files.
Allowed Extensions
FileHelper
supports an optional vector of allowed file extensions. You can define specific extensions or use wildcards (*
). If an extension is not listed, the file will be considered invalid during validation.
Highlighting
Custom highlighting of input lines is applied to directories, valid files, and invalid files:
- Directories are shown in blue.
- Valid Files (according to allowed extensions) are shown in green.
- Invalid Files (with disallowed extensions) are shown in red.
Command Support
Several common shell commands such as cd
, ls
, pwd
, and clear
are recognized by the validator. Paths entered after these commands are validated.
Path Validation
The validator expands ~
to the user's home directory and checks whether the input corresponds to an existing file or directory. If a file does not exist or does not match allowed extensions, a helpful error message is shown.
Error Handling
The library uses anyhow::Result
to simplify error handling for setting up the readline editor.
License
This project is licensed under the MIT License. See the LICENSE file for details.
Dependencies
~4–12MB
~131K SLoC