added autopsy option

src/args.rs

@@ -2,6 +2,11 @@ use clap::Parser;
 
 #[derive(Parser)]
 pub struct Args {
+    /// open, print, and remove the log file
+    /// (if it exists)
+    #[arg(short, long)]
+    pub autopsy: bool,
+
     /// root of the new filesystem
     #[arg(
         default_value_t = String::from(".")

src/main.rs

@@ -14,9 +14,9 @@ use terminal::Terminal;
 use pane::prelude::*;
 
 use std::fs::{remove_file, OpenOptions};
-use std::io::{Error, ErrorKind};
+use std::io::{read_to_string, Error, ErrorKind};
 
-use anyhow::{Result as AnyResult, Error as AnyError};
+use anyhow::{Context, Error as AnyError, Result as AnyResult};
 use clap::Parser;
 use crossterm::event::{read, Event, KeyEvent};
 use gag::Redirect;
@@ -27,6 +27,19 @@ const LOG_EXISTS_MSG: &str = "the log file exists, implying dirbuider didn't exi
 fn main() -> AnyResult<()> {
     let args = Args::parse();
 
+    if args.autopsy {
+        let f = OpenOptions::new()
+            .read(true)
+            .open(LOG_FILE)
+            .map_err(Into::<AnyError>::into)
+            .context(LOG_FILE)?;
+        let s = read_to_string(f)?;
+        eprint!("{s}");
+        remove_file(LOG_FILE)?;
+
+        return Ok(());
+    }
+    
     let target = OpenOptions::new()
         .write(true)
         .create_new(true)