cli `fix`: add `revsets.fix` config for default revset to be fixed

CHANGELOG.md

···
 
 * Show paths to config files when configuration errors occur
 
+* `jj fix` now supports configuring the default revset for `-s` using the
+  `revsets.fix` config.
+
 ### Fixed bugs
 
 ## [0.18.0] - 2024-06-05

cli/src/commands/fix.rs

···
 #[derive(clap::Args, Clone, Debug)]
 #[command(verbatim_doc_comment)]
 pub(crate) struct FixArgs {
-    /// Fix files in the specified revision(s) and their descendants
+    /// Fix files in the specified revision(s) and their descendants. If no
+    /// revisions are specified, this defaults to the `revsets.fix` setting, or
+    /// `@` if it is not set.
     #[arg(long, short)]
     source: Vec<RevisionArg>,
     /// Fix only these paths
···
     args: &FixArgs,
 ) -> Result<(), CommandError> {
     let mut workspace_command = command.workspace_helper(ui)?;
-    let root_commits: Vec<CommitId> = workspace_command
-        .parse_union_revsets(if args.source.is_empty() {
-            &[RevisionArg::AT]
-        } else {
-            &args.source
-        })?
-        .evaluate_to_commit_ids()?
-        .collect();
+    let root_commits: Vec<CommitId> = if args.source.is_empty() {
+        workspace_command.parse_revset(&RevisionArg::from(
+            command.settings().config().get_string("revsets.fix")?,
+        ))?
+    } else {
+        workspace_command.parse_union_revsets(&args.source)?
+    }
+    .evaluate_to_commit_ids()?
+    .collect();
     workspace_command.check_rewritable(root_commits.iter())?;
     let matcher = workspace_command
         .parse_file_patterns(&args.paths)?

cli/src/config-schema.json

···
             "type": "object",
             "description": "Revset expressions used by various commands",
             "properties": {
+                "fix": {
+                    "type": "string",
+                    "description": "Default set of revisions to fix when no explicit revset is given for jj fix",
+                    "default": "@"
+                },
                 "log": {
                     "type": "string",
                     "description": "Default set of revisions to show when no explicit revset is given for jj log and similar commands",

cli/src/config/revsets.toml

···
 # adding/updating any of these aliases
 
 [revsets]
+fix = "@"
 log = "@ | ancestors(immutable_heads().., 2) | trunk()"
 
 [revset-aliases]

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

···
 
 ###### **Options:**
 
-* `-s`, `--source <SOURCE>` — Fix files in the specified revision(s) and their descendants
+* `-s`, `--source <SOURCE>` — Fix files in the specified revision(s) and their descendants. If no revisions are specified, this defaults to the `revsets.fix` setting, or `@` if it is not set
 
 
 

cli/tests/test_fix_command.rs

···
 }
 
 #[test]
+fn test_default_revset() {
+    let (test_env, repo_path) = init_with_fake_formatter(&["--uppercase"]);
+    std::fs::write(repo_path.join("file"), "foo").unwrap();
+    test_env.jj_cmd_ok(&repo_path, &["branch", "create", "foo"]);
+    test_env.jj_cmd_ok(&repo_path, &["new"]);
+    std::fs::write(repo_path.join("file"), "bar").unwrap();
+    test_env.jj_cmd_ok(&repo_path, &["branch", "create", "bar"]);
+    test_env.jj_cmd_ok(&repo_path, &["new", "foo"]);
+    std::fs::write(repo_path.join("file"), "baz").unwrap();
+    test_env.jj_cmd_ok(&repo_path, &["branch", "create", "baz"]);
+
+    // With no args and no revset configuration, we fix `@`.
+    let (stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["fix"]);
+    insta::assert_snapshot!(stdout, @"");
+    insta::assert_snapshot!(stderr, @r###"
+    Fixed 1 commits of 1 checked.
+    Working copy now at: mzvwutvl 5205c5f1 baz | (no description set)
+    Parent commit      : qpvuntsm 34af74d0 foo | (no description set)
+    Added 0 files, modified 1 files, removed 0 files
+    "###);
+    let content = test_env.jj_cmd_success(&repo_path, &["print", "file", "-r", "foo"]);
+    insta::assert_snapshot!(content, @"foo");
+    let content = test_env.jj_cmd_success(&repo_path, &["print", "file", "-r", "bar"]);
+    insta::assert_snapshot!(content, @"bar");
+    let content = test_env.jj_cmd_success(&repo_path, &["print", "file", "-r", "baz"]);
+    insta::assert_snapshot!(content, @"BAZ");
+}
+
+#[test]
+fn test_custom_default_revset() {
+    let (test_env, repo_path) = init_with_fake_formatter(&["--uppercase"]);
+
+    std::fs::write(repo_path.join("file"), "foo").unwrap();
+    test_env.jj_cmd_ok(&repo_path, &["branch", "create", "foo"]);
+    test_env.jj_cmd_ok(&repo_path, &["new"]);
+    std::fs::write(repo_path.join("file"), "bar").unwrap();
+    test_env.jj_cmd_ok(&repo_path, &["branch", "create", "bar"]);
+
+    // Check out a different commit so that the schema default `@` would behave
+    // differently from our customized default.
+    test_env.jj_cmd_ok(&repo_path, &["new", "-r", "foo"]);
+    test_env.add_config(r#"revsets.fix = "bar""#);
+
+    let (stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["fix"]);
+    insta::assert_snapshot!(stdout, @"");
+    insta::assert_snapshot!(stderr, @r###"
+    Fixed 1 commits of 1 checked.
+    "###);
+    let content = test_env.jj_cmd_success(&repo_path, &["print", "file", "-r", "foo"]);
+    insta::assert_snapshot!(content, @"foo");
+    let content = test_env.jj_cmd_success(&repo_path, &["print", "file", "-r", "bar"]);
+    insta::assert_snapshot!(content, @"BAR");
+}
+
+#[test]
 fn test_fix_immutable_commit() {
     let (test_env, repo_path) = init_with_fake_formatter(&["--uppercase"]);
     std::fs::write(repo_path.join("file"), "immutable").unwrap();