cli: move resolve_destination_revs to mod.rs

Summary: This is currently used by `new.rs`, `workspace.rs`, and `rebase.rs`,
so just move it into the parent module for cleanliness, but keep the
`pub(crate)` qualifier.

Signed-off-by: Austin Seipp <[email protected]>
Change-Id: I0ea12afd8107f95a37a91340820221a0

cli/src/commands/mod.rs

@@ -60,17 +60,19 @@ use std::io::Write;
 use std::{fmt, fs, io};
 
 use clap::{Command, CommandFactory, FromArgMatches, Subcommand};
+use indexmap::IndexSet;
 use itertools::Itertools;
 use jj_lib::commit::Commit;
 use jj_lib::matchers::EverythingMatcher;
 use jj_lib::merged_tree::MergedTree;
-use jj_lib::repo::ReadonlyRepo;
+use jj_lib::repo::{ReadonlyRepo, Repo};
 use jj_lib::rewrite::merge_commit_trees;
 use jj_lib::settings::UserSettings;
 use tracing::instrument;
 
 use crate::cli_util::{
-    run_ui_editor, user_error, Args, CommandError, CommandHelper, WorkspaceCommandHelper,
+    resolve_multiple_nonempty_revsets_default_single, run_ui_editor, user_error, Args,
+    CommandError, CommandHelper, RevisionArg, WorkspaceCommandHelper,
 };
 use crate::diff_util::{self, DiffFormat};
 use crate::formatter::PlainTextFormatter;
@@ -275,6 +277,23 @@ fn make_branch_term(branch_names: &[impl fmt::Display]) -> String {
     }
 }
 
+/// Resolves revsets into revisions to rebase onto. These revisions don't have
+/// to be rewriteable.
+pub(crate) fn resolve_destination_revs(
+    workspace_command: &WorkspaceCommandHelper,
+    ui: &mut Ui,
+    revisions: &[RevisionArg],
+) -> Result<IndexSet<Commit>, CommandError> {
+    let commits =
+        resolve_multiple_nonempty_revsets_default_single(workspace_command, ui, revisions)?;
+    let root_commit_id = workspace_command.repo().store().root_commit_id();
+    if commits.len() >= 2 && commits.iter().any(|c| c.id() == root_commit_id) {
+        Err(user_error("Cannot merge with root revision"))
+    } else {
+        Ok(commits)
+    }
+}
+
 pub fn default_app() -> Command {
     Commands::augment_subcommands(Args::command())
 }

cli/src/commands/new.rs

@@ -25,7 +25,6 @@ use tracing::instrument;
 use crate::cli_util::{
     self, short_commit_hash, user_error, CommandError, CommandHelper, RevisionArg,
 };
-use crate::commands::rebase::resolve_destination_revs;
 use crate::ui::Ui;
 
 /// Create a new, empty change and edit it in the working copy
@@ -76,7 +75,7 @@ Please use `jj new 'all:x|y'` instead of `jj new --allow-large-revsets x y`.",
         !args.revisions.is_empty(),
         "expected a non-empty list from clap"
     );
-    let target_commits = resolve_destination_revs(&workspace_command, ui, &args.revisions)?
+    let target_commits = super::resolve_destination_revs(&workspace_command, ui, &args.revisions)?
         .into_iter()
         .collect_vec();
     let target_ids = target_commits.iter().map(|c| c.id().clone()).collect_vec();

cli/src/commands/rebase.rs

@@ -161,7 +161,7 @@ Please use `jj rebase -d 'all:x|y'` instead of `jj rebase --allow-large-revsets
         ));
     }
     let mut workspace_command = command.workspace_helper(ui)?;
-    let new_parents = resolve_destination_revs(&workspace_command, ui, &args.destination)?
+    let new_parents = super::resolve_destination_revs(&workspace_command, ui, &args.destination)?
         .into_iter()
         .collect_vec();
     if let Some(rev_str) = &args.revision {
@@ -390,20 +390,3 @@ fn check_rebase_destinations(
     }
     Ok(())
 }
-
-/// Resolves revsets into revisions to rebase onto. These revisions don't have
-/// to be rewriteable.
-pub(crate) fn resolve_destination_revs(
-    workspace_command: &WorkspaceCommandHelper,
-    ui: &mut Ui,
-    revisions: &[RevisionArg],
-) -> Result<IndexSet<Commit>, CommandError> {
-    let commits =
-        resolve_multiple_nonempty_revsets_default_single(workspace_command, ui, revisions)?;
-    let root_commit_id = workspace_command.repo().store().root_commit_id();
-    if commits.len() >= 2 && commits.iter().any(|c| c.id() == root_commit_id) {
-        Err(user_error("Cannot merge with root revision"))
-    } else {
-        Ok(commits)
-    }
-}

cli/src/commands/workspace.rs

@@ -192,13 +192,9 @@ fn cmd_workspace_add(
             vec![tx.repo().store().root_commit()]
         }
     } else {
-        crate::commands::rebase::resolve_destination_revs(
-            &old_workspace_command,
-            ui,
-            &args.revision,
-        )?
-        .into_iter()
-        .collect_vec()
+        super::resolve_destination_revs(&old_workspace_command, ui, &args.revision)?
+            .into_iter()
+            .collect_vec()
     };
 
     let tree = merge_commit_trees(tx.repo(), &parents)?;