Update version

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lndups"
-version = "0.1.4"
+version = "0.1.5"
 edition = "2021"
 description = "Hardlink duplicate files"
 authors = ["George H <georgeh124v2@gmail.com>"]
@@ -10,8 +10,8 @@ license = "GPL-3.0-or-later"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "4.5", features = ["derive"] }
 shlex = "1.3"
-smallvec = "1.13"
-structopt = "0.3"
+smallvec = "1.14"
 
 unicode-width = "<0.1.14" # subdependency causing compilation failure

src/main.rs

@@ -1,14 +1,13 @@
 extern crate shlex;
 extern crate smallvec;
-extern crate structopt;
 use std::borrow::Borrow;
 use std::cell::RefCell;
 use std::collections::HashMap;
 use std::io::{Read, Write, BufReader, BufRead};
 use std::os::linux::fs::MetadataExt as MetadataExtLinux;
 use std::path::{Path, PathBuf};
-use crate::structopt::StructOpt;
-use crate::smallvec::*;
+use clap::Parser;
+use smallvec::*;
 
 
 
@@ -16,54 +15,57 @@ macro_rules! s_arg_target_file_name { () => { "target-file" } }
 macro_rules! s_default_target_separator { () => { ";" } }
 
 
-#[derive(StructOpt)]
-#[structopt(
-    about="Hardlink duplicate files recursively\nSymlinks are treated as normal files",
-    usage=concat!(env!("CARGO_PKG_NAME"), " [OPTION]... TARGET... ['", s_default_target_separator!(), "' TARGET...]")
+#[derive(Parser)]
+#[command(
+    about=concat!(
+        "Hardlink duplicate files recursively\n",
+        "Symlinks are treated as normal files",
+    ),
+    // usage=concat!(env!("CARGO_PKG_NAME"), " [OPTION]... TARGET... ['", s_default_target_separator!(), "' TARGET...]")
 )]
 struct CLIArguments {
-    #[structopt(short, long, parse(from_occurrences), help="Increase verbosity")]
+    #[arg(short, long, action=clap::ArgAction::Count, help="Increase verbosity")]
     verbose: i8,
 
-    #[structopt(short, long, parse(from_occurrences), help="Decrease verbosity")]
+    #[arg(short, long, action=clap::ArgAction::Count, help="Decrease verbosity")]
     quiet: i8,
 
-    #[structopt(long, help=concat!(
+    #[arg(long, help=concat!(
         "Disable brace notation for output\n",
         "  Ex: /home/user/{dir,backup}/file",
     ))]
     no_brace_output: bool,
 
-    #[structopt(long, help=concat!(
+    #[arg(long, help=concat!(
         "Perform no operations on the filesystem",
     ))]
     dry_run: bool,
 
-    #[structopt(short="i", help=concat!(
+    #[arg(short='i', help=concat!(
         "Prompt once before operating\n",
         "Doesn't occurs if no targets are provided",
     ))]
     prompt: bool,
 
-    #[structopt(short, long, value_name="VALUE", help=concat!(
+    #[arg(short, long, value_name="VALUE", help=concat!(
         "Minimum file size to be considered for hardlinking\n",
         "Never goes below 1 (the default)",
     ))]
     min_size: Option<u64>,
 
-    #[structopt(short, long, value_name="SEPARATOR", help=concat!(
+    #[arg(short, long, value_name="SEPARATOR", help=concat!(
         "Separator between sets of targets (default: ", s_default_target_separator!(), ")",
     ))]
     separator: Option<String>,
 
-    #[structopt(long=s_arg_target_file_name!(), value_name="FILE", help=concat!(
+    #[arg(long=s_arg_target_file_name!(), value_name="FILE", help=concat!(
         "File to source targets from (can be '-' for stdin)\n",
         "Same rules as CLI argument targets apply\n",
         "Mutually exclusive with CLI argument targets",
     ))]
     file_containing_targets: Option<String>,
 
-    #[structopt(value_name="TARGET", help=concat!(
+    #[arg(value_name="TARGET", help=concat!(
         "Target files and directories (recursive)\n",
         "Each SEPARATOR denotes a new set of targets\n",
         "  Each set of targets are separate from all other sets\n",
@@ -87,11 +89,11 @@ struct Config {
 
 
 fn main() -> Result<(), i32> {
-    let mut args = CLIArguments::from_args();
+    let mut args = CLIArguments::parse();
     let verbosity = args.verbose - args.quiet;
 
     let config = Config {
-        min_size: args.min_size.map(|v| if v > 1 { v } else { 1 }).unwrap_or(1),
+        min_size: args.min_size.map(|v| std::cmp::max(v, 1)).unwrap_or(1),
         no_brace_output: args.no_brace_output,
         dry_run: args.dry_run,
         verbosity
@@ -127,13 +129,13 @@ fn main() -> Result<(), i32> {
     }
 
     if args.prompt {
-        if !prompt_confirm(&run_targets) {
+        if !prompt_confirm(&run_targets).map_err(|_| { eprintln!("IO Error during confirmation prompt"); 1 })? {
             return Ok(());
         }
     }
 
     for paths in run_paths {
-        run(paths, &config);
+        run(paths, &config).map_err(|_| 1)?;
     }
 
     Ok(())
@@ -187,7 +189,8 @@ fn obtain_run_targets<'a>(
 
 
 /// result has no symlinks; may be empty; contents each nonempty
-fn obtain_run_paths<T, Y, U>(run_targets: T, verbosity: i8) -> Result<Vec<Vec<PathWithMetadata>>, i32>
+fn obtain_run_paths<T, Y, U>(run_targets: T, verbosity: i8)
+    -> Result<Vec<Vec<PathWithMetadata>>, i32>
 where
     T: Iterator<Item=Y> + ExactSizeIterator,
     Y: Iterator<Item=U> + ExactSizeIterator,
@@ -222,7 +225,7 @@ where
 
 
 /// perform a full run
-fn run(pwmds: Vec<PathWithMetadata>, cfg: &Config) {
+fn run(pwmds: Vec<PathWithMetadata>, cfg: &Config) -> std::io::Result<()> {
     let mut registry: HashMap<u64, Vec<PathWithMetadata>> = HashMap::new();
     for pwmd in pwmds {
         register(pwmd, &mut registry, cfg);
@@ -233,25 +236,31 @@ fn run(pwmds: Vec<PathWithMetadata>, cfg: &Config) {
 
     if let Some(stdout_buffer) = &mut stdout_buffer {
         if cfg.verbosity >= 0 {
-            writeln!(stdout_buffer, "Considering {} total files for duplicates", registry.iter().map(|(_,files)| files.len()).sum::<usize>()).unwrap();
+            writeln!(stdout_buffer,
+                "Considering {} total files for duplicates",
+                registry.iter().map(|(_,files)| files.len()).sum::<usize>()
+            )?;
         }
     }
 
     for (fsize, pwmds) in registry {
-        run_one_size(fsize, &pwmds, cfg, stdout_buffer.as_mut());
-    }
+        run_one_size(fsize, &pwmds, cfg, stdout_buffer.as_mut())?;
     }
 
-fn run_one_size<W: Write>(fsize: u64, pwmds: &[PathWithMetadata], cfg: &Config, mut stdout_buffer: Option<&mut W>) {
+    Ok(())
+}
+
+fn run_one_size<W: Write>(fsize: u64, pwmds: &[PathWithMetadata], cfg: &Config, mut stdout_buffer: Option<&mut W>) -> std::io::Result<()> {
     if let Some(stdout_buffer) = stdout_buffer.as_mut() {
         if cfg.verbosity >= 1 {
-            writeln!(stdout_buffer, "Considering {} files of size {} for duplicates", pwmds.len(), fsize).unwrap();
+            writeln!(stdout_buffer, "Considering {} files of size {} for duplicates", pwmds.len(), fsize)?;
         }
     }
     // if cfg.verbosity >= 0 {
     //     pwmds.sort_by_key(|pwmd| pwmd.path.file_name().unwrap_or_default().to_string_lossy().to_string());
     // }
-    let mut by_inode: Vec<SmallVec<[&PathWithMetadata; 1]>> = Vec::with_capacity((pwmds.len() as f64 * 0.8) as usize); // each nonempty
+    let mut by_inode: Vec<SmallVec<[&PathWithMetadata; 1]>>
+        = Vec::with_capacity((pwmds.len() as f64 * 0.8) as usize); // each nonempty
     let mut inodes: Vec<u64> = Vec::with_capacity(by_inode.len());
     for pwmd in pwmds {
         let inode: u64 = pwmd.md().st_ino();
@@ -282,6 +291,8 @@ fn run_one_size<W: Write>(fsize: u64, pwmds: &[PathWithMetadata], cfg: &Config,
         }
         i += 1;
     }
+
+    Ok(())
 }
 
 
@@ -334,7 +345,7 @@ impl PathWithMetadata {
         Ok(PathWithMetadata{ path, md })
     }
     #[inline(always)]
-    pub fn md(&self) -> std::cell::Ref<std::fs::Metadata> {
+    pub fn md<'a>(&'a self) -> std::cell::Ref<'a, std::fs::Metadata> {
         self.md.borrow()
     }
     pub fn reset_md(&self) -> Result<(), String> {
@@ -360,23 +371,21 @@ impl AsRef<Path> for PathWithMetadata {
 
 
 /// return whether or not user gave confirmation
-fn prompt_confirm<'a, T: Borrow<[Y]>, Y: AsRef<str>>(run_targets: &[T]) -> bool {
-    println!("Are you sure you want to link all duplicates in each of these sets of targets?");
+fn prompt_confirm<'a, T: Borrow<[Y]>, Y: AsRef<str>>(run_targets: &[T]) -> std::io::Result<bool> {
+    {
+        let mut stdout_buffer = std::io::BufWriter::new(std::io::stdout().lock());
+        writeln!(&mut stdout_buffer, "Are you sure you want to link all duplicates in each of these sets of targets?")?;
         for spaths in run_targets {
-        println!("  {}", shlex::try_join(spaths.borrow().iter().map(|s| s.as_ref())).unwrap());
+            writeln!(&mut stdout_buffer, "  {}", shlex::try_join(spaths.borrow().iter().map(|s| s.as_ref())).unwrap())?;
+        }
+        write!(&mut stdout_buffer, "> ")?;
+        stdout_buffer.flush().unwrap_or_else(|_| ());
     }
-    print!("> ");
-    std::io::stdout().flush().unwrap_or_else(|_| ());
 
     let mut response = String::new();
-    std::io::stdin().read_line(&mut response).unwrap_or_else(
-        |_| {
-            eprintln!("Problem reading input");
-            std::process::exit(1);
-        }
-    );
+    std::io::stdin().read_line(&mut response)?;
 
-    response.to_lowercase().starts_with("y")
+    Ok(response.to_lowercase().starts_with("y"))
 }
 
 fn read_lines(reader: impl BufRead, dest: &mut Vec<String>) -> Result<(), String> {
@@ -464,7 +473,6 @@ where T: smallvec::Array<Item=&'b PathWithMetadata>,
                 writeln!(stdout_buffer, "hardlinked {}", format_pair(&keep.path.to_string_lossy(), &replace.path.to_string_lossy(), cfg)).unwrap();
             }
         }
-        drop(keep);
         keeps.push(replace);
     }
     true