I liked rust when I tried it last year around May. I also did some contributions to cargo which is the package manager for Rust.
I wanted to do something in rust, something small to do over in the weekend. I finally decided to mimic unix’s ls (List files). So the program will just print the details of the files and directories with the path, size and modified time. Also display the total block size.
Here is a list of all the external packages I’ve used.
To get the total file bock size, I had to get all the files first using
std::fs. Then iterate through them to get the block size of
each file and add them up to
In rust if you iterate through an iterator, then it cannot be reused. So I had to get the files again. Iterate through them and get the following
- File path
- File size
- File modified at datetime.
Getting file path and size are pretty straight forward.
file_path.display() gives the path name and
gives the size of the file.
With the file modified datetime we have to convert into the required display format. This is where we need to use
Local.timestamp(file_modified as i64, 0); to get the datetime in the local time zone and
format("%h %d %H:%M") for formatting the
colored package to add terminal colors.
So the output looks like this
total 128 1 ./.DS_Store 6148 Oct 29 21:46 2 ./.git 510 Oct 30 21:37 3 ./.gitignore 341 Oct 16 14:33 4 ./Cargo.lock 4608 Oct 17 00:43 5 ./Cargo.toml 133 Oct 17 00:43 6 ./LICENSE 35141 Oct 16 14:33 7 ./README.md 151 Oct 16 16:26 8 ./src 136 Oct 16 14:33 9 ./target 102 Oct 16 00:27
Source code can be found here. This is a very trivial code to get started with rust.