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zcashd-wallet-tool: improve the error message for an invalid logging filter directive. 

Signed-off-by: Daira Hopwood <daira@jacaranda.org>
This commit is contained in:
Daira Hopwood 2022-04-18 17:27:30 +01:00
parent 195bb75502
commit fbc191a2e1
1 changed files with 8 additions and 3 deletions
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11
src/rust/bin/wallet_tool.rs
View File

@ -133,11 +133,16 @@ enum WalletToolError {
pub fn main() {
// Log to stderr, configured by the RUST_LOG environment variable.
let directive = env::var("RUST_LOG").unwrap_or_else(|_| "".to_string());
fmt()
.with_writer(io::stderr)
.with_env_filter(
EnvFilter::try_from_default_env().unwrap_or_else(|err| EnvFilter::new("error")),
)
.with_env_filter(EnvFilter::try_new(&directive).unwrap_or_else(|_| {
eprintln!(
"Warning: could not parse filter directive '{}'\nfrom the RUST_LOG environment variable; using 'error' instead.\n",
&directive
);
EnvFilter::new("error")
}))
.init();
// Allow either Bitcoin-style or GNU-style arguments.