From d196662ac6789d8f483edb229fadec5d6b3daf20 Mon Sep 17 00:00:00 2001
From: James McDonald <james@jamesmcdonald.com>
Date: Mon, 27 Apr 2026 20:46:04 +0200
Subject: [PATCH] Replace HashSet with IndexSet to preserve order

Also clean up some match arms.
---
 Cargo.lock | 23 +++++++++++++++++++++++
 Cargo.toml |  1 +
 src/job.rs | 32 ++++++++++++++++----------------
 3 files changed, 40 insertions(+), 16 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 78a40b8..ca7dcea 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -154,12 +154,24 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5baebc0774151f905a1a2cc41989300b1e6fbb29aff0ceffa1064fdd3088d582"
 
+[[package]]
+name = "hashbrown"
+version = "0.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4f467dd6dccf739c208452f8014c75c18bb8301b050ad1cfb27153803edb0f51"
+
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -190,6 +202,16 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "indexmap"
+version = "2.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.2"
@@ -417,4 +439,5 @@ version = "0.2.3"
 dependencies = [
  "chrono",
  "clap",
+ "indexmap",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 2837cff..d55c05d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,4 @@ publish = false
 [dependencies]
 chrono = "0.4.44"
 clap = { version = "4.6.1", features = ["derive"] }
+indexmap = "2.14.0"
diff --git a/src/job.rs b/src/job.rs
index e1ce9ee..fc95126 100644
--- a/src/job.rs
+++ b/src/job.rs
@@ -2,12 +2,13 @@ use crate::command;
 use crate::progress::BackupEvent;
 use crate::progress::filter;
 use chrono::{Local, NaiveDateTime};
+use indexmap::set::IndexSet;
 use std::collections::HashSet;
 use std::fmt;
 use std::sync::mpsc::Sender;
 
 pub struct Job {
-    datasets: HashSet<String>,
+    datasets: IndexSet<String>,
     target: String,
     source_zfs_command: Vec<String>,
     target_zfs_command: Vec<String>,
@@ -284,24 +285,23 @@ fn parse_command(commandstr: &str) -> Vec<String> {
 
     for c in commandstr.chars() {
         match c {
+            '\'' if !in_double_quote => {
+                in_single_quote = !in_single_quote;
+            }
             '\'' => {
-                if !in_double_quote {
-                    in_single_quote = !in_single_quote;
-                } else {
-                    arg.push(c);
-                }
+                arg.push(c);
+            }
+            '"' if !in_single_quote => {
+                in_double_quote = !in_double_quote;
             }
             '"' => {
-                if !in_single_quote {
-                    in_double_quote = !in_double_quote;
-                } else {
-                    arg.push(c);
-                }
+                arg.push(c);
+            }
+            ' ' if in_single_quote || in_double_quote => {
+                arg.push(c);
             }
             ' ' => {
-                if in_single_quote || in_double_quote {
-                    arg.push(c);
-                } else if !arg.is_empty() {
+                if !arg.is_empty() {
                     command.push(arg.clone());
                     arg.clear();
                 }
@@ -362,7 +362,7 @@ impl JobBuilder {
     }
 
     pub fn build(self) -> Result<Job, String> {
-        let mut datasets: HashSet<String> = HashSet::new();
+        let mut datasets: IndexSet<String> = IndexSet::new();
         for source in &self.sources {
             let recurse = source.ends_with("/...");
             let source = source.trim_end_matches("/...");
@@ -382,7 +382,7 @@ impl JobBuilder {
             return Err(String::from("no matching source datasets found"));
         }
         Ok(Job {
-            datasets: datasets,
+            datasets,
             target: self.target,
             source_zfs_command: self.source_zfs_command,
             target_zfs_command: self.target_zfs_command,