diff --git a/rust/rhg/src/main.rs b/rust/rhg/src/main.rs --- a/rust/rhg/src/main.rs +++ b/rust/rhg/src/main.rs @@ -1,6 +1,6 @@ extern crate log; use crate::error::CommandError; -use crate::ui::Ui; +use crate::ui::{local_to_utf8, Ui}; use clap::App; use clap::AppSettings; use clap::Arg; @@ -364,7 +364,7 @@ ) -> ! { if let ( OnUnsupported::Fallback { executable }, - Err(CommandError::UnsupportedFeature { .. }), + Err(CommandError::UnsupportedFeature { message }), ) = (&on_unsupported, &result) { let mut args = std::env::args_os(); @@ -394,6 +394,8 @@ )); on_unsupported = OnUnsupported::Abort } else { + log::debug!("falling back (see trace-level log)"); + log::trace!("{}", local_to_utf8(message)); // `args` is now `argv[1..]` since we’ve already consumed // `argv[0]` let mut command = Command::new(executable_path); diff --git a/rust/rhg/src/ui.rs b/rust/rhg/src/ui.rs --- a/rust/rhg/src/ui.rs +++ b/rust/rhg/src/ui.rs @@ -130,3 +130,9 @@ let bytes = s.as_bytes(); Cow::Borrowed(bytes) } + +/// Decode user system bytes to Rust string. +pub fn local_to_utf8(s: &[u8]) -> Cow { + // TODO decode from the user's system // + String::from_utf8_lossy(s) +}