sparse: extract "set --reset" to subcommand

Since --reset conflicts with the other flags, "set --reset" seems odd.

CHANGELOG.md

@@ -16,7 +16,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * The `git_head` template keyword now returns an optional value instead of a
   list of 0 or 1 element.
 
-* The `jj sparse set --edit` was split up into `jj sparse edit`.
+* The `jj sparse set --edit`/`--reset` flags were split up into `jj sparse
+  edit`/`reset` subcommands respectively.
 
 * The `jj sparse` subcommands now parse and print patterns as workspace-relative
   paths.

cli/src/commands/sparse.rs

@@ -37,6 +37,7 @@ use crate::ui::Ui;
 pub(crate) enum SparseArgs {
     List(SparseListArgs),
     Set(SparseSetArgs),
+    Reset(SparseResetArgs),
     Edit(SparseEditArgs),
 }
 
@@ -73,11 +74,12 @@ pub(crate) struct SparseSetArgs {
     /// Include no files in the working copy (combine with --add)
     #[arg(long)]
     clear: bool,
-    /// Include all files in the working copy
-    #[arg(long, conflicts_with_all = &["add", "remove", "clear"])]
-    reset: bool,
 }
 
+/// Reset the patterns to include all files in the working copy
+#[derive(clap::Args, Clone, Debug)]
+pub(crate) struct SparseResetArgs {}
+
 /// Start an editor to update the patterns that are present in the working copy
 #[derive(clap::Args, Clone, Debug)]
 pub(crate) struct SparseEditArgs {}
@@ -91,6 +93,7 @@ pub(crate) fn cmd_sparse(
     match args {
         SparseArgs::List(sub_args) => cmd_sparse_list(ui, command, sub_args),
         SparseArgs::Set(sub_args) => cmd_sparse_set(ui, command, sub_args),
+        SparseArgs::Reset(sub_args) => cmd_sparse_reset(ui, command, sub_args),
         SparseArgs::Edit(sub_args) => cmd_sparse_edit(ui, command, sub_args),
     }
 }
@@ -117,23 +120,31 @@ fn cmd_sparse_set(
     let mut workspace_command = command.workspace_helper(ui)?;
     update_sparse_patterns_with(ui, &mut workspace_command, |_ui, old_patterns| {
         let mut new_patterns = HashSet::new();
-        if args.reset {
-            new_patterns.insert(RepoPathBuf::root());
-        } else {
-            if !args.clear {
-                new_patterns.extend(old_patterns.iter().cloned());
-                for path in &args.remove {
-                    new_patterns.remove(path);
-                }
-            }
-            for path in &args.add {
-                new_patterns.insert(path.to_owned());
+        if !args.clear {
+            new_patterns.extend(old_patterns.iter().cloned());
+            for path in &args.remove {
+                new_patterns.remove(path);
             }
         }
+        for path in &args.add {
+            new_patterns.insert(path.to_owned());
+        }
         Ok(new_patterns.into_iter().sorted_unstable().collect())
     })
 }
 
+#[instrument(skip_all)]
+fn cmd_sparse_reset(
+    ui: &mut Ui,
+    command: &CommandHelper,
+    _args: &SparseResetArgs,
+) -> Result<(), CommandError> {
+    let mut workspace_command = command.workspace_helper(ui)?;
+    update_sparse_patterns_with(ui, &mut workspace_command, |_ui, _old_patterns| {
+        Ok(vec![RepoPathBuf::root()])
+    })
+}
+
 #[instrument(skip_all)]
 fn cmd_sparse_edit(
     ui: &mut Ui,

cli/tests/cli-reference@.md.snap

@@ -70,6 +70,7 @@ This document contains the help content for the `jj` command-line program.
 * [`jj sparse`↴](#jj-sparse)
 * [`jj sparse list`↴](#jj-sparse-list)
 * [`jj sparse set`↴](#jj-sparse-set)
+* [`jj sparse reset`↴](#jj-sparse-reset)
 * [`jj sparse edit`↴](#jj-sparse-edit)
 * [`jj split`↴](#jj-split)
 * [`jj squash`↴](#jj-squash)
@@ -1615,6 +1616,7 @@ Manage which paths from the working-copy commit are present in the working copy
 
 * `list` — List the patterns that are currently present in the working copy
 * `set` — Update the patterns that are present in the working copy
+* `reset` — Reset the patterns to include all files in the working copy
 * `edit` — Start an editor to update the patterns that are present in the working copy
 
 
@@ -1645,11 +1647,15 @@ For example, if all you need is the `README.md` and the `lib/` directory, use `j
 
   Possible values: `true`, `false`
 
-* `--reset` — Include all files in the working copy
 
-  Possible values: `true`, `false`
 
 
+## `jj sparse reset`
+
+Reset the patterns to include all files in the working copy
+
+**Usage:** `jj sparse reset`
+
 
 
 ## `jj sparse edit`

cli/tests/test_sparse_command.rs

@@ -122,7 +122,7 @@ fn test_sparse_manage_patterns() {
     assert!(!repo_path.join("file3").exists());
 
     // Can reset back to all files
-    let (stdout, stderr) = test_env.jj_cmd_ok(&sub_dir, &["sparse", "set", "--reset"]);
+    let (stdout, stderr) = test_env.jj_cmd_ok(&sub_dir, &["sparse", "reset"]);
     insta::assert_snapshot!(stdout, @"");
     insta::assert_snapshot!(stderr, @r###"
     Added 2 files, modified 0 files, removed 0 files