cli: simplify-parents: add default revsets.simplify-parents config

This adds a new `revsets.simplify-parents` configuration option (similar
to `revsets.fix`) which serves as the default revset for `jj
simplify-parents` if no `--source` or `--revisions` arguments are
provided.

CHANGELOG.md

@@ -71,6 +71,10 @@ to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
   "diff3" conflict style, meaning it is more likely to work with external tools,
   but it doesn't support conflicts with more than 2 sides.
 
+* `jj simplify-parents` now supports configuring the default revset when no
+   `--source` or `--revisions` arguments are provided with the
+   `revsets.simplify-parents` config.
+
 ### Fixed bugs
 
 * `jj config unset <TABLE-NAME>` no longer removes a table (such as `[ui]`.)

cli/src/commands/simplify_parents.rs

@@ -20,22 +20,17 @@ use crate::ui::Ui;
 /// ancestor of B, A will be rewritten to have only B as a parent instead of
 /// B+C.
 #[derive(clap::Args, Clone, Debug)]
-#[command(group = clap::ArgGroup::new("revision-args").multiple(true).required(true))]
 pub(crate) struct SimplifyParentsArgs {
     /// Simplify specified revision(s) together with their trees of descendants
     /// (can be repeated)
-    #[arg(
+    #[arg(long, short, add = ArgValueCandidates::new(complete::mutable_revisions))]
-        long, short,
-        group = "revision-args",
-        add = ArgValueCandidates::new(complete::mutable_revisions),
-    )]
     source: Vec<RevisionArg>,
     /// Simplify specified revision(s) (can be repeated)
-    #[arg(
+    ///
-        long, short,
+    /// If both `--source` and `--revisions` are not provided, this defaults to
-        group = "revision-args",
+    /// the `revsets.simplify-parents` setting, or `reachable(@, mutable())`
-        add = ArgValueCandidates::new(complete::mutable_revisions),
+    /// if it is not set.
-    )]
+    #[arg(long, short, add = ArgValueCandidates::new(complete::mutable_revisions))]
     revisions: Vec<RevisionArg>,
 }
 
@@ -45,16 +40,24 @@ pub(crate) fn cmd_simplify_parents(
     args: &SimplifyParentsArgs,
 ) -> Result<(), CommandError> {
     let mut workspace_command = command.workspace_helper(ui)?;
-    let revs = RevsetExpression::descendants(
+    let revs = if args.source.is_empty() && args.revisions.is_empty() {
+        let revs = command.settings().get_string("revsets.simplify-parents")?;
         workspace_command
-            .parse_union_revsets(ui, &args.source)?
+            .parse_revset(ui, &RevisionArg::from(revs))?
-            .expression(),
+            .expression()
-    )
+            .clone()
-    .union(
+    } else {
-        workspace_command
+        RevsetExpression::descendants(
-            .parse_union_revsets(ui, &args.revisions)?
+            workspace_command
-            .expression(),
+                .parse_union_revsets(ui, &args.source)?
-    );
+                .expression(),
+        )
+        .union(
+            workspace_command
+                .parse_union_revsets(ui, &args.revisions)?
+                .expression(),
+        )
+    };
     let commit_ids: Vec<_> = workspace_command
         .attach_revset_evaluator(revs)
         .evaluate_to_commit_ids()?

cli/src/config-schema.json

@@ -421,6 +421,11 @@
                     "type": "string",
                     "description": "Revisions to give shorter change and commit IDs to",
                     "default": "<revsets.log>"
+                },
+                "simplify-parents": {
+                    "type": "string",
+                    "description": "Default set of revisions to simplify when no explicit revset is given for jj simplify-parents",
+                    "default": "reachable(@, mutable())"
                 }
             },
             "additionalProperties": {

cli/src/config/revsets.toml

@@ -3,6 +3,7 @@
 
 [revsets]
 fix = "reachable(@, mutable())"
+simplify-parents = "reachable(@, mutable())"
 # log revset is also used as the default short-prefixes. If it failed to
 # evaluate, lengthy warning messages would be printed. Use present(expr) to
 # suppress symbol resolution error.
@@ -13,8 +14,8 @@ log = "present(@) | ancestors(immutable_heads().., 2) | present(trunk())"
 # symbol resolution error should be suppressed.
 'trunk()' = '''
 latest(
-  remote_bookmarks(exact:"main", exact:"origin") | 
+  remote_bookmarks(exact:"main", exact:"origin") |
-  remote_bookmarks(exact:"master", exact:"origin") | 
+  remote_bookmarks(exact:"master", exact:"origin") |
   remote_bookmarks(exact:"trunk", exact:"origin") |
   remote_bookmarks(exact:"main", exact:"upstream") |
   remote_bookmarks(exact:"master", exact:"upstream") |

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

@@ -1975,13 +1975,15 @@ Removes all parents of each of the specified revisions that are also indirect an
 
 In other words, for all (A, B, C) where A has (B, C) as parents and C is an ancestor of B, A will be rewritten to have only B as a parent instead of B+C.
 
-**Usage:** `jj simplify-parents <--source <SOURCE>|--revisions <REVISIONS>>`
+**Usage:** `jj simplify-parents [OPTIONS]`
 
 ###### **Options:**
 
 * `-s`, `--source <SOURCE>` — Simplify specified revision(s) together with their trees of descendants (can be repeated)
 * `-r`, `--revisions <REVISIONS>` — Simplify specified revision(s) (can be repeated)
 
+   If both `--source` and `--revisions` are not provided, this defaults to the `revsets.simplify-parents` setting, or `reachable(@, mutable())` if it is not set.
+
 
 
 ## `jj sparse`

cli/tests/test_simplify_parents_command.rs

@@ -36,21 +36,6 @@ fn create_commit(test_env: &TestEnvironment, repo_path: &Path, name: &str, paren
     test_env.jj_cmd_ok(repo_path, &["bookmark", "create", name]);
 }
 
-#[test]
-fn test_simplify_parents_no_args() {
-    let (test_env, repo_path) = create_repo();
-
-    let stderr = test_env.jj_cmd_cli_error(&repo_path, &["simplify-parents"]);
-    insta::assert_snapshot!(stderr, @r###"
-    error: the following required arguments were not provided:
-      <--source <SOURCE>|--revisions <REVISIONS>>
-
-    Usage: jj simplify-parents <--source <SOURCE>|--revisions <REVISIONS>>
-
-    For more information, try '--help'.
-    "###);
-}
-
 #[test]
 fn test_simplify_parents_no_commits() {
     let (test_env, repo_path) = create_repo();
@@ -248,3 +233,74 @@ fn test_simplify_parents_multiple_redundant_parents() {
     ◆
     "#);
 }
+
+#[test]
+fn test_simplify_parents_no_args() {
+    let (test_env, repo_path) = create_repo();
+
+    create_commit(&test_env, &repo_path, "a", &["root()"]);
+    create_commit(&test_env, &repo_path, "b", &["a"]);
+    create_commit(&test_env, &repo_path, "c", &["a", "b"]);
+    create_commit(&test_env, &repo_path, "d", &["c"]);
+    create_commit(&test_env, &repo_path, "e", &["d"]);
+    create_commit(&test_env, &repo_path, "f", &["d", "e"]);
+    let stdout = test_env.jj_cmd_success(&repo_path, &["log", "-r", "all()", "-T", "description"]);
+    insta::assert_snapshot!(stdout, @r#"
+    @    f
+    ├─╮
+    │ ○  e
+    ├─╯
+    ○  d
+    ○    c
+    ├─╮
+    │ ○  b
+    ├─╯
+    ○  a
+    ◆
+    "#);
+    let setup_opid = test_env.current_operation_id(&repo_path);
+
+    let (stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["simplify-parents"]);
+    insta::assert_snapshot!(stdout, @"");
+    insta::assert_snapshot!(stderr, @r#"
+    Removed 2 edges from 2 out of 6 commits.
+    Rebased 2 descendant commits
+    Working copy now at: kmkuslsw 8cc01e1b f | f
+    Parent commit      : znkkpsqq 040ae3a6 e | e
+    "#);
+
+    let stdout = test_env.jj_cmd_success(&repo_path, &["log", "-r", "all()", "-T", "description"]);
+    insta::assert_snapshot!(stdout, @r#"
+    @  f
+    ○  e
+    ○  d
+    ○  c
+    ○  b
+    ○  a
+    ◆
+    "#);
+
+    // Test with custom `revsets.simplify-parents`.
+    test_env.jj_cmd_ok(&repo_path, &["op", "restore", &setup_opid]);
+    test_env.add_config(r#"revsets.simplify-parents = "d::""#);
+    let (stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["simplify-parents"]);
+    insta::assert_snapshot!(stdout, @"");
+    insta::assert_snapshot!(stderr, @r#"
+    Removed 1 edges from 1 out of 3 commits.
+    Working copy now at: kmkuslsw 0c6b4c43 f | f
+    Parent commit      : znkkpsqq 6a679611 e | e
+    "#);
+
+    let stdout = test_env.jj_cmd_success(&repo_path, &["log", "-r", "all()", "-T", "description"]);
+    insta::assert_snapshot!(stdout, @r#"
+    @  f
+    ○  e
+    ○  d
+    ○    c
+    ├─╮
+    │ ○  b
+    ├─╯
+    ○  a
+    ◆
+    "#);
+}