cli: migrate "chmod" to matcher API, warn unmatched paths

cli/src/commands/chmod.rs

@@ -12,13 +12,12 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use itertools::Itertools;
 use jj_lib::backend::TreeValue;
 use jj_lib::merged_tree::MergedTreeBuilder;
 use jj_lib::object_id::ObjectId;
 use tracing::instrument;
 
-use crate::cli_util::{CommandHelper, RevisionArg};
+use crate::cli_util::{print_unmatched_explicit_paths, CommandHelper, RevisionArg};
 use crate::command_error::{user_error, CommandError};
 use crate::ui::Ui;
 
@@ -60,30 +59,25 @@ pub(crate) fn cmd_chmod(
     };
 
     let mut workspace_command = command.workspace_helper(ui)?;
-    // TODO: migrate to .parse_file_patterns()?.to_matcher()
-    let repo_paths: Vec<_> = args
-        .paths
-        .iter()
-        .map(|path| workspace_command.parse_file_path(path))
-        .try_collect()?;
     let commit = workspace_command.resolve_single_rev(&args.revision)?;
     workspace_command.check_rewritable([commit.id()])?;
+    let tree = commit.tree()?;
+    // TODO: No need to add special case for empty paths when switching to
+    // parse_union_filesets(). paths = [] should be "none()" if supported.
+    let fileset_expression = workspace_command.parse_file_patterns(&args.paths)?;
+    let matcher = fileset_expression.to_matcher();
+    print_unmatched_explicit_paths(ui, &workspace_command, &fileset_expression, [&tree])?;
 
     let mut tx = workspace_command.start_transaction();
-    let tree = commit.tree()?;
     let store = tree.store();
     let mut tree_builder = MergedTreeBuilder::new(commit.tree_id().clone());
-    for repo_path in repo_paths {
+    for (repo_path, tree_value) in tree.entries_matching(matcher.as_ref()) {
         let user_error_with_path = |msg: &str| {
             user_error(format!(
                 "{msg} at '{}'.",
                 tx.base_workspace_helper().format_file_path(&repo_path)
             ))
         };
-        let tree_value = tree.path_value(&repo_path);
-        if tree_value.is_absent() {
-            return Err(user_error_with_path("No such path"));
-        }
         let all_files = tree_value
             .adds()
             .flatten()

cli/tests/test_chmod_command.rs

@@ -116,27 +116,16 @@ fn test_chmod_regular_conflict() {
     >>>>>>>
     "###);
 
-    // An error prevents `chmod` from making any changes.
-    // In this case, the failure with `nonexistent` prevents any changes to `file`.
-    let stderr = test_env.jj_cmd_failure(&repo_path, &["chmod", "x", "nonexistent", "file"]);
+    // Unmatched paths should generate warnings
+    let (_stdout, stderr) = test_env.jj_cmd_ok(&repo_path, &["chmod", "x", "nonexistent", "file"]);
     insta::assert_snapshot!(stderr, @r###"
-    Error: No such path at 'nonexistent'.
-    "###);
-    let stdout = test_env.jj_cmd_success(&repo_path, &["debug", "tree"]);
-    insta::assert_snapshot!(stdout, 
-    @r###"
-    file: Conflicted([Some(File { id: FileId("587be6b4c3f93f93c489c0111bba5596147a26cb"), executable: false }), Some(File { id: FileId("df967b96a579e45a18b8251732d16804b2e56a55"), executable: false }), Some(File { id: FileId("8ba3a16384aacc37d01564b28401755ce8053f51"), executable: false })])
-    "###);
-    let stdout = test_env.jj_cmd_success(&repo_path, &["cat", "file"]);
-    insta::assert_snapshot!(stdout, 
-    @r###"
-    <<<<<<<
-    %%%%%%%
-    -base
-    +x
-    +++++++
-    n
-    >>>>>>>
+    Warning: No matching entries for paths: nonexistent
+    Working copy now at: yostqsxw cbc43289 conflict | (conflict) conflict
+    Parent commit      : royxmykx 427fbd2f x | x
+    Parent commit      : zsuskuln 3f83a26d n | n
+    Added 0 files, modified 1 files, removed 0 files
+    There are unresolved conflicts at these paths:
+    file    2-sided conflict including an executable
     "###);
 }