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bridge/build.rs: make error messages helpful. resolves #98

This commit is contained in:
Maximilian Krüger 2018-01-25 09:51:22 +01:00
parent 7d9a875cab
commit 8a8380e7a8
1 changed files with 31 additions and 14 deletions
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45
bridge/build.rs
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@ -1,18 +1,35 @@
use std::process::Command;
fn main() {
// rerun build script if bridge contract has changed.
// without this cargo doesn't since the bridge contract
// is outside the crate directories
println!("cargo:rerun-if-changed=../contracts/bridge.sol");
let exit_status = Command::new("solc")
.arg("--abi")
.arg("--bin")
.arg("--optimize")
.arg("--output-dir").arg("../compiled_contracts")
.arg("--overwrite")
.arg("../contracts/bridge.sol")
.status()
.unwrap_or_else(|e| panic!("Error compiling solidity contracts: {}", e));
assert!(exit_status.success(), "There was an error while compiling contracts code.");
// rerun build script if bridge contract has changed.
// without this cargo doesn't since the bridge contract
// is outside the crate directories
println!("cargo:rerun-if-changed=../contracts/bridge.sol");
match Command::new("solc")
.arg("--abi")
.arg("--bin")
.arg("--optimize")
.arg("--output-dir").arg("../compiled_contracts")
.arg("--overwrite")
.arg("../contracts/bridge.sol")
.status()
{
Ok(exit_status) => {
if !exit_status.success() {
if let Some(code) = exit_status.code() {
panic!("`solc` exited with error exit status code `{}`", code);
} else {
panic!("`solc` exited because it was terminated by a signal");
}
}
},
Err(err) => {
if let std::io::ErrorKind::NotFound = err.kind() {
panic!("`solc` executable not found in `$PATH`. `solc` is required to compile the bridge contracts. please install it: https://solidity.readthedocs.io/en/develop/installing-solidity.html");
} else {
panic!("an error occurred when trying to spawn `solc`: {}", err);
}
}
}
}