cli: move resolve_multiple_nonempty_revsets_default_single() to command helper

resolve_revset_default_single() will be inlined instead. Since "default_single"
evaluation can return multiple revisions, the CLI interface usually accepts
multiple arguments. This suggests that there would be no external callers of
the singular resolve_revset_default_single().

cli/src/cli_util.rs

@@ -753,6 +753,34 @@ impl WorkspaceCommandHelper {
         self.resolve_single_rev_with_hint_about_all_prefix(revision_str, false)
     }
 
+    /// Evaluates revset expressions to non-empty set of commits. The returned
+    /// set preserves the order of the input expressions.
+    ///
+    /// If an input expression is prefixed with `all:`, it may be evaluated to
+    /// any number of revisions (including 0.)
+    pub fn resolve_some_revsets_default_single(
+        &self,
+        revision_args: &[RevisionArg],
+    ) -> Result<IndexSet<Commit>, CommandError> {
+        let mut all_commits = IndexSet::new();
+        for revision_str in revision_args {
+            let commits = self.resolve_revset_default_single(revision_str)?;
+            for commit in commits {
+                let commit_hash = short_commit_hash(commit.id());
+                if !all_commits.insert(commit) {
+                    return Err(user_error(format!(
+                        r#"More than one revset resolved to revision {commit_hash}"#,
+                    )));
+                }
+            }
+        }
+        if all_commits.is_empty() {
+            Err(user_error("Empty revision set"))
+        } else {
+            Ok(all_commits)
+        }
+    }
+
     /// Resolve a revset any number of revisions (including 0).
     pub fn resolve_revset(&self, revision_str: &str) -> Result<Vec<Commit>, CommandError> {
         Ok(self
@@ -764,7 +792,7 @@ impl WorkspaceCommandHelper {
     /// Resolve a revset any number of revisions (including 0), but require the
     /// user to indicate if they allow multiple revisions by prefixing the
     /// expression with `all:`.
-    pub fn resolve_revset_default_single(
+    fn resolve_revset_default_single(
         &self,
         revision_str: &str,
     ) -> Result<Vec<Commit>, CommandError> {
@@ -1598,29 +1626,6 @@ pub fn print_trackable_remote_branches(ui: &Ui, view: &View) -> io::Result<()> {
     Ok(())
 }
 
-pub fn resolve_multiple_nonempty_revsets_default_single(
-    workspace_command: &WorkspaceCommandHelper,
-    revisions: &[RevisionArg],
-) -> Result<IndexSet<Commit>, CommandError> {
-    let mut all_commits = IndexSet::new();
-    for revision_str in revisions {
-        let commits = workspace_command.resolve_revset_default_single(revision_str)?;
-        for commit in commits {
-            let commit_hash = short_commit_hash(commit.id());
-            if !all_commits.insert(commit) {
-                return Err(user_error(format!(
-                    r#"More than one revset resolved to revision {commit_hash}"#,
-                )));
-            }
-        }
-    }
-    if all_commits.is_empty() {
-        Err(user_error("Empty revision set"))
-    } else {
-        Ok(all_commits)
-    }
-}
-
 pub fn update_working_copy(
     repo: &Arc<ReadonlyRepo>,
     workspace: &mut Workspace,

cli/src/commands/new.rs

@@ -22,9 +22,7 @@ use jj_lib::revset::{RevsetExpression, RevsetIteratorExt};
 use jj_lib::rewrite::{merge_commit_trees, rebase_commit};
 use tracing::instrument;
 
-use crate::cli_util::{
+use crate::cli_util::{short_commit_hash, CommandHelper, RevisionArg};
-    resolve_multiple_nonempty_revsets_default_single, short_commit_hash, CommandHelper, RevisionArg,
-};
 use crate::command_error::{user_error, CommandError};
 use crate::description_util::join_message_paragraphs;
 use crate::ui::Ui;
@@ -96,8 +94,8 @@ Please use `jj new 'all:x|y'` instead of `jj new --allow-large-revsets x y`.",
         ));
     }
     let mut workspace_command = command.workspace_helper(ui)?;
-    let target_commits =
+    let target_commits = workspace_command
-        resolve_multiple_nonempty_revsets_default_single(&workspace_command, &args.revisions)?
+        .resolve_some_revsets_default_single(&args.revisions)?
         .into_iter()
         .collect_vec();
     let target_ids = target_commits.iter().map(|c| c.id().clone()).collect_vec();

cli/src/commands/rebase.rs

@@ -30,8 +30,8 @@ use jj_lib::settings::UserSettings;
 use tracing::instrument;
 
 use crate::cli_util::{
-    resolve_multiple_nonempty_revsets_default_single, short_commit_hash, CommandHelper,
+    short_commit_hash, CommandHelper, RevisionArg, WorkspaceCommandHelper,
-    RevisionArg, WorkspaceCommandHelper, WorkspaceCommandTransaction,
+    WorkspaceCommandTransaction,
 };
 use crate::command_error::{user_error, CommandError};
 use crate::formatter::Formatter;
@@ -193,8 +193,8 @@ Please use `jj rebase -d 'all:x|y'` instead of `jj rebase --allow-large-revsets
         simplify_ancestor_merge: false,
     };
     let mut workspace_command = command.workspace_helper(ui)?;
-    let new_parents =
+    let new_parents = workspace_command
-        resolve_multiple_nonempty_revsets_default_single(&workspace_command, &args.destination)?
+        .resolve_some_revsets_default_single(&args.destination)?
         .into_iter()
         .collect_vec();
     if let Some(rev_str) = &args.revision {
@@ -221,8 +221,7 @@ Please use `jj rebase -d 'all:x|y'` instead of `jj rebase --allow-large-revsets
             rev_str,
         )?;
     } else if !args.source.is_empty() {
-        let source_commits =
+        let source_commits = workspace_command.resolve_some_revsets_default_single(&args.source)?;
-            resolve_multiple_nonempty_revsets_default_single(&workspace_command, &args.source)?;
         rebase_descendants_transaction(
             ui,
             command.settings(),
@@ -235,7 +234,7 @@ Please use `jj rebase -d 'all:x|y'` instead of `jj rebase --allow-large-revsets
         let branch_commits = if args.branch.is_empty() {
             IndexSet::from([workspace_command.resolve_single_rev("@")?])
         } else {
-            resolve_multiple_nonempty_revsets_default_single(&workspace_command, &args.branch)?
+            workspace_command.resolve_some_revsets_default_single(&args.branch)?
         };
         rebase_branch(
             ui,

cli/src/commands/workspace.rs

@@ -29,9 +29,8 @@ use jj_lib::workspace::Workspace;
 use tracing::instrument;
 
 use crate::cli_util::{
-    check_stale_working_copy, print_checkout_stats,
+    check_stale_working_copy, print_checkout_stats, short_commit_hash, CommandHelper, RevisionArg,
-    resolve_multiple_nonempty_revsets_default_single, short_commit_hash, CommandHelper,
+    WorkingCopyFreshness, WorkspaceCommandHelper,
-    RevisionArg, WorkingCopyFreshness, WorkspaceCommandHelper,
 };
 use crate::command_error::{internal_error_with_message, user_error, CommandError};
 use crate::ui::Ui;
@@ -203,7 +202,8 @@ fn cmd_workspace_add(
             vec![tx.repo().store().root_commit()]
         }
     } else {
-        resolve_multiple_nonempty_revsets_default_single(&old_workspace_command, &args.revision)?
+        old_workspace_command
+            .resolve_some_revsets_default_single(&args.revision)?
             .into_iter()
             .collect_vec()
     };