some semblance of an event loop

src/lib.rs

@@ -13,8 +13,8 @@ pub(crate) mod prelude {
     pub use std::{
         error::Error as StdError,
         ffi::{OsStr, OsString},
-        fmt::{Display, Formatter, Result as FmtResult},
-        io::{Error as IoError, Read, Seek, SeekFrom, Write},
+        fmt::{Debug, Display, Formatter, Result as FmtResult},
+        io::{Error as IoError, ErrorKind as IoErrorKind, Read, Seek, SeekFrom, Write},
         path::{Path, PathBuf},
         process::{Command, ExitCode},
         str::FromStr,
@@ -33,6 +33,8 @@ pub(crate) mod prelude {
     #[cfg(unix)]
     pub use fs_err::os::unix::fs::{FileExt, OpenOptionsExt};
 
+    pub use bstr::ByteSlice;
+
     pub use tap::{Pipe, Tap, TapFallible};
 
     pub use tracing::{Level, debug, error, info, trace, warn};
@@ -44,11 +46,13 @@ pub mod args;
 pub use args::{AppendCmd, Args};
 mod color;
 pub use color::{_CLI_ENABLE_COLOR, SHOULD_COLOR};
+mod daemon;
+pub use daemon::Daemon;
 mod daemon_io;
 pub use daemon_io::OwnedFdWithFlags;
 pub mod line;
-mod nixcmd;
 pub use line::Line;
+mod nixcmd;
 pub mod source;
 pub use source::{SourceFile, SourceLine};
 
@@ -67,6 +71,8 @@ use _regex::Regex;
 use itertools::Itertools;
 use serde::{Deserialize, Serialize};
 
+use crate::args::DaemonCmd;
+
 pub const ASCII_WHITESPACE: &[char] = &['\t', '\n', '\x0C', '\r', ' '];
 
 /// Regex pattern to extract the priority in a `lib.mkOverride` call.
@@ -118,6 +124,13 @@ pub fn do_append(args: Arc<Args>, append_args: AppendCmd) -> Result<(), BoxDynEr
     Ok(())
 }
 
+//#[tracing::instrument(level = "debug")]
+pub fn do_daemon(args: Arc<Args>, daemon_args: DaemonCmd) -> Result<(), BoxDynError> {
+    let mut daemon = Daemon::from_stdin();
+    daemon.enter_loop().unwrap();
+    todo!();
+}
+
 #[derive(Debug, Clone, PartialEq, Hash, Serialize, Deserialize)]
 pub struct DefinitionWithLocation {
     pub file: Box<Path>,