- We can calculate the checksum for a given path
- For each file, we generate a SHA-1 hash
- Lastly, we combine and hash all of those
Both processes for collecting files and generating hashes are executed in parallel.
Start with help:
./compute_checksum --help
Usage: compute_checksum [OPTIONS] --path <PATH>
Options:
-p, --path <PATH>
-e, --exclude <EXCLUDE>
-h, --help Print help
-V, --version Print version
Example:
./compute_checksum --path ./target
./compute_checksum --path ./target --exclude "*/build" --exclude "*/deps"
cargo run
cargo build
cargo build --release
Let’s compare it with the equivalent in Bash by cloning [email protected]:rust-lang/rust.git to use as input:
1m 9.18s >> ./compute_checksum.sh ../rust/
2.67s >> ./compute_checksum --path ../rust/ --exclude "*/node_modules" (2.67s)