cli: add jj op log --no-graph

Seems useful, and makes it consistent with the `jj log` and `jj
obslog`.

CHANGELOG.md

@@ -18,6 +18,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Support for the Watchman filesystem monitor is now bundled by default. Set
   `core.fsmonitor = "watchman"` in your repo to enable.
 
+* `jj op log` now supports `--no-graph`.
+
 ### Fixed bugs
 
 ## [0.9.0] - 2023-09-06

cli/src/commands/operation.rs

@@ -29,6 +29,9 @@ pub struct OperationLogArgs {
     /// Limit number of operations to show
     #[arg(long, short)]
     limit: Option<usize>,
+    /// Don't show the graph, show a flat list of operations
+    #[arg(long)]
+    no_graph: bool,
     /// Render each operation using the given template
     ///
     /// For the syntax, see https://github.com/martinvonz/jj/blob/main/docs/templates.md
@@ -120,34 +123,45 @@ fn cmd_op_log(
     ui.request_pager();
     let mut formatter = ui.stdout_formatter();
     let formatter = formatter.as_mut();
-    let mut graph = get_graphlog(command.settings(), formatter.raw());
-    let default_node_symbol = graph.default_node_symbol().to_owned();
-    for op in operation::walk_ancestors(&head_op).take(args.limit.unwrap_or(usize::MAX)) {
-        let mut edges = vec![];
-        for parent in op.parents() {
-            edges.push(Edge::direct(parent.id().clone()));
+    let iter = operation::walk_ancestors(&head_op).take(args.limit.unwrap_or(usize::MAX));
+    if !args.no_graph {
+        let mut graph = get_graphlog(command.settings(), formatter.raw());
+        let default_node_symbol = graph.default_node_symbol().to_owned();
+        for op in iter {
+            let mut edges = vec![];
+            for parent in op.parents() {
+                edges.push(Edge::direct(parent.id().clone()));
+            }
+            let is_head_op = op.id() == &head_op_id;
+            let mut buffer = vec![];
+            with_content_format.write_graph_text(
+                ui.new_formatter(&mut buffer).as_mut(),
+                |formatter| {
+                    formatter.with_label("op_log", |formatter| template.format(&op, formatter))
+                },
+                || graph.width(op.id(), &edges),
+            )?;
+            if !buffer.ends_with(b"\n") {
+                buffer.push(b'\n');
+            }
+            let node_symbol = if is_head_op {
+                "@"
+            } else {
+                &default_node_symbol
+            };
+            graph.add_node(
+                op.id(),
+                &edges,
+                node_symbol,
+                &String::from_utf8_lossy(&buffer),
+            )?;
         }
-        let is_head_op = op.id() == &head_op_id;
-        let mut buffer = vec![];
-        with_content_format.write_graph_text(
-            ui.new_formatter(&mut buffer).as_mut(),
-            |formatter| formatter.with_label("op_log", |formatter| template.format(&op, formatter)),
-            || graph.width(op.id(), &edges),
-        )?;
-        if !buffer.ends_with(b"\n") {
-            buffer.push(b'\n');
+    } else {
+        for op in iter {
+            with_content_format.write(formatter, |formatter| {
+                formatter.with_label("op_log", |formatter| template.format(&op, formatter))
+            })?;
         }
-        let node_symbol = if is_head_op {
-            "@"
-        } else {
-            &default_node_symbol
-        };
-        graph.add_node(
-            op.id(),
-            &edges,
-            node_symbol,
-            &String::from_utf8_lossy(&buffer),
-        )?;
     }
 
     Ok(())

cli/tests/test_operations.rs

@@ -130,6 +130,22 @@ fn test_op_log_limit() {
     "###);
 }
 
+#[test]
+fn test_op_log_no_graph() {
+    let test_env = TestEnvironment::default();
+    test_env.jj_cmd_success(test_env.env_root(), &["init", "repo", "--git"]);
+    let repo_path = test_env.env_root().join("repo");
+
+    let stdout =
+        test_env.jj_cmd_success(&repo_path, &["op", "log", "--no-graph", "--color=always"]);
+    insta::assert_snapshot!(stdout, @r###"
+    19b8089fc78b [38;5;[email protected] 2001-02-03 04:05:07.000 +07:00 - 2001-02-03 04:05:07.000 +07:00
+    add workspace 'default'
+    f1c462c494be [38;5;[email protected] 2001-02-03 04:05:07.000 +07:00 - 2001-02-03 04:05:07.000 +07:00
+    initialize repo
+    "###);
+}
+
 #[test]
 fn test_op_log_template() {
     let test_env = TestEnvironment::default();