diff_util: add copy records tracking to DiffRenderer::show_patch

This allow `jj show --summary` and other commands to include copy
tracking information.

cli/src/diff_util.rs

@@ -349,13 +349,21 @@ impl<'a> DiffRenderer<'a> {
     ) -> Result<(), DiffRenderError> {
         let from_tree = commit.parent_tree(self.repo)?;
         let to_tree = commit.tree()?;
+        let mut copy_records = CopyRecords::default();
+        for parent_id in commit.parent_ids() {
+            copy_records.add_records(self.repo.store().get_copy_records(
+                None,
+                parent_id,
+                commit.id(),
+            )?)?;
+        }
         self.show_diff(
             ui,
             formatter,
             &from_tree,
             &to_tree,
             matcher,
-            &Default::default(),
+            &copy_records,
             width,
         )
     }

cli/tests/test_show_command.rs

@@ -62,8 +62,7 @@ fn test_show_basic() {
        1    1: foo
             2: bar
        2    3: baz quxquux
-    Added regular file file3:
-            1: foo
+    Modified regular file file3 (file1 => file3):
     "###);
 
     let stdout = test_env.jj_cmd_success(&repo_path, &["show", "--context=0"]);
@@ -81,8 +80,7 @@ fn test_show_basic() {
        1    1: foo
             2: bar
        2    3: baz quxquux
-    Added regular file file3:
-            1: foo
+    Modified regular file file3 (file1 => file3):
     "###);
 
     let stdout = test_env.jj_cmd_success(&repo_path, &["show", "--color=debug"]);
@@ -100,8 +98,7 @@ fn test_show_basic() {
     <<diff removed line_number::   1>><<diff:: >><<diff added line_number::   1>><<diff::: foo>>
     <<diff::     >><<diff added line_number::   2>><<diff::: >><<diff added token::bar>>
     <<diff removed line_number::   2>><<diff:: >><<diff added line_number::   3>><<diff::: baz >><<diff removed token::qux>><<diff added token::quux>><<diff::>>
-    <<diff header::Added regular file file3:>>
-    <<diff::     >><<diff added line_number::   1>><<diff::: >><<diff added token::foo>>
+    <<diff header::Modified regular file file3 (file1 => file3):>>
     "###);
 
     let stdout = test_env.jj_cmd_success(&repo_path, &["show", "-s"]);
@@ -113,9 +110,8 @@ fn test_show_basic() {
 
         (no description set)
 
-    D file1
     M file2
-    A file3
+    R {file1 => file3}
     "###);
 
     let stdout = test_env.jj_cmd_success(&repo_path, &["show", "--types"]);
@@ -242,9 +238,8 @@ fn test_show_basic() {
 
         (no description set)
 
-    D file1
     M file2
-    A file3
+    R {file1 => file3}
     diff --git a/file1 b/file1
     deleted file mode 100644
     index 257cc5642c..0000000000
@@ -279,10 +274,9 @@ fn test_show_basic() {
 
         (no description set)
 
-    file1 | 1 -
-    file2 | 3 ++-
-    file3 | 1 +
-    3 files changed, 3 insertions(+), 2 deletions(-)
+    file2            | 3 ++-
+    {file1 => file3} | 0
+    2 files changed, 2 insertions(+), 1 deletion(-)
     "###);
 }