xxxd 0.1

What's this?

This is a project I prepared to try my hand at using git.

As of September 2023, I don't really understand git, GitHub or GitLab.

What happens if it is executed?

If you run xxxd 0.1 without any options, it will display a list of information (size and SHA256 checksum value) for the files in the current directory.

The results are similar to the following hash_list.txt.
https://gitlab.com/-/snippets/2416279

I will try to make the Ruby and Python editions output the same results as much as possible.

Shell script edition may not follow the functionalities of other editions.

Future plans

Additional fetures such as fine-grained control by specifying options and processing data from STDIN are planned.

But since it is basically a tool for my own use, and since I have created a repository to try out git, there is a possibility that there will be frequent and sudden changes in specifications.

There is also a possibility of abrupt and inconsistent feature additions.

Miscellaneous notes

about the option "--out=btcdh"

"btcdh" means "bitcoin double hash".

For example, in legacy transactions, a style that existed before SegWit appeared in 2017, applying this "btcdh" process to the raw data of a transaction results in a transaction ID (txid).

Let's actually check this.

1. Create a new directory to store raw bitcoin transaction data.

$ mkdir txid_test
$ cd txid_test
$ wget -q https://gitlab.com/cleemy-desu-wayo/xxxd0.1/-/raw/4865500e9c522214df373d27c3f65a626d154a2b/xxxd0.1.rb
$ wget -q https://blockstream.info/api/tx/8507fb93e06572f278284028c23826407ca1dbeed13a1b7f514d2738e0978227/raw -O tx_8507fb93e06572f278284028c23826407ca1dbeed13a1b7f514d2738e0978227.dat
$ wc -c *
 299 tx_8507fb93e06572f278284028c23826407ca1dbeed13a1b7f514d2738e0978227.dat
1891 xxxd0.1.rb
2190 total

2. If you run xxxd with --out=btcdh when there are only two files in the current directory, xxxd.0.1.rb and raw transaction data, you should get something like the following.

$ chmod 705 xxxd0.1.rb
$ ./xxxd0.1.rb --out=btcdh
#####################################################################
# hash list
# 
# 2023-09-28 19:31:06 UTC
# 
# format:
#   <byte size>,<btcdh>
# 
#####################################################################
299,8507fb93e06572f278284028c23826407ca1dbeed13a1b7f514d2738e0978227