summarize: print subject when summarizing.

src/bin/fingerprint.rs

@@ -16,9 +16,9 @@ use walkdir::WalkDir;
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
 struct Args {
-    /// Number years to search through
-    #[arg(short, long, default_value_t = 1)]
-    years: usize,
+    /// Number days to search through
+    #[arg(short, long, default_value_t = 365)]
+    days: i64,
 
     /// Enable verbose logging
     #[arg(short, long, default_value_t = false)]
@@ -38,9 +38,8 @@ struct Args {
 
 fn main() -> anyhow::Result<()> {
     let args = Args::parse();
-    let n = 1;
-    // Just check messages from the last N years.
-    let max_age = 60 * 60 * 24 * 365 * n;
+    // Just check messages from the last N days.
+    let max_age = 60 * 60 * 24 * args.days;
     let start = std::time::Instant::now();
     let unix_secs = SystemTime::now()
         .duration_since(UNIX_EPOCH)

src/bin/summarize.rs

@@ -2,7 +2,7 @@ use std::fs::File;
 
 use clap::Parser;
 use email::fingerprint;
-use mailparse::parse_mail;
+use mailparse::{parse_mail, MailHeaderMap};
 use memmap::MmapOptions;
 
 /// Use library to summarize information about given mail files
@@ -19,7 +19,11 @@ fn main() -> anyhow::Result<()> {
         let file = File::open(&path)?;
         let mmap = unsafe { MmapOptions::new().map(&file)? };
         let m = parse_mail(&mmap)?;
-        println!("{path}\n{}", fingerprint(&m).join("\n"));
+        let subject = m
+            .headers
+            .get_first_value("subject")
+            .unwrap_or("(NO SUBJECT)".to_owned());
+        println!("{subject}: {path}\n{}", fingerprint(&m).join("\n"));
     }
     Ok(())
 }