1031f79aca
## Issue Addressed
NA
## Proposed Changes
This PR adds some more fancy macro magic to make it easier to add a new built-in (aka "baked-in") testnet config to the `lighthouse` binary.
Previously, a user needed to modify several files and repeat themselves several times. Now, they only need to add a single definition in the `eth2_config` crate. No repetition 🎉
56 lines
2.0 KiB
Rust
56 lines
2.0 KiB
Rust
//! Extracts zipped genesis states on first run.
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use eth2_config::{Eth2NetArchiveAndDirectory, ETH2_NET_DIRS, GENESIS_FILE_NAME};
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use std::fs::File;
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use std::io;
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use zip::ZipArchive;
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fn main() {
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for network in ETH2_NET_DIRS {
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match uncompress_state(network) {
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Ok(()) => (),
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Err(e) => panic!(
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"Failed to uncompress {} genesis state zip file: {}",
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network.name, e
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),
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}
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}
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}
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/// Uncompress the network configs archive into a network configs folder.
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fn uncompress_state(network: &Eth2NetArchiveAndDirectory<'static>) -> Result<(), String> {
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let genesis_ssz_path = network.dir().join(GENESIS_FILE_NAME);
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// Take care to not overwrite the genesis.ssz if it already exists, as that causes
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// spurious rebuilds.
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if genesis_ssz_path.exists() {
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return Ok(());
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}
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if network.genesis_is_known {
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// Extract genesis state from genesis.ssz.zip
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let archive_path = network.genesis_state_archive();
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let archive_file = File::open(&archive_path)
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.map_err(|e| format!("Failed to open archive file {:?}: {:?}", archive_path, e))?;
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let mut archive =
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ZipArchive::new(archive_file).map_err(|e| format!("Error with zip file: {}", e))?;
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let mut file = archive.by_name(GENESIS_FILE_NAME).map_err(|e| {
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format!(
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"Error retrieving file {} inside zip: {}",
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GENESIS_FILE_NAME, e
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)
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})?;
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let mut outfile = File::create(&genesis_ssz_path)
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.map_err(|e| format!("Error while creating file {:?}: {}", genesis_ssz_path, e))?;
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io::copy(&mut file, &mut outfile)
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.map_err(|e| format!("Error writing file {:?}: {}", genesis_ssz_path, e))?;
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} else {
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// Create empty genesis.ssz if genesis is unknown
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File::create(genesis_ssz_path)
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.map_err(|e| format!("Failed to create {}: {}", GENESIS_FILE_NAME, e))?;
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}
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Ok(())
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}
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