templater: integrate copy tracking in commit.diff() template

cli/src/commit_templater.rs

@@ -1311,11 +1311,17 @@ impl TreeDiff {
         commit: &Commit,
         matcher: Rc<dyn Matcher>,
     ) -> BackendResult<Self> {
+        let mut copy_records = CopyRecords::default();
+        for parent in commit.parent_ids() {
+            let records =
+                diff_util::get_copy_records(repo.store(), parent, commit.id(), &*matcher)?;
+            copy_records.add_records(records)?;
+        }
         Ok(TreeDiff {
             from_tree: commit.parent_tree(repo)?,
             to_tree: commit.tree()?,
             matcher,
-            copy_records: Default::default(), // TODO: real copy tracking
+            copy_records,
         })
     }
 

cli/tests/test_commit_template.rs

@@ -951,9 +951,15 @@ fn test_log_diff_predefined_formats() {
 
     std::fs::write(repo_path.join("file1"), "a\nb\n").unwrap();
     std::fs::write(repo_path.join("file2"), "a\n").unwrap();
+    std::fs::write(repo_path.join("rename-source"), "rename").unwrap();
     test_env.jj_cmd_ok(&repo_path, &["new"]);
     std::fs::write(repo_path.join("file1"), "a\nb\nc\n").unwrap();
     std::fs::write(repo_path.join("file2"), "b\nc\n").unwrap();
+    std::fs::rename(
+        repo_path.join("rename-source"),
+        repo_path.join("rename-target"),
+    )
+    .unwrap();
 
     let template = r#"
     concat(
@@ -982,6 +988,7 @@ fn test_log_diff_predefined_formats() {
     Modified regular file file2:
        1    1: ab
             2: c
+    Modified regular file rename-target (rename-source => rename-target):
     === git ===
     diff --git a/file1 b/file1
     index 422c2b7ab3..de980441c3 100644
@@ -999,13 +1006,18 @@ fn test_log_diff_predefined_formats() {
     -a
     +b
     +c
+    diff --git a/rename-source b/rename-target
+    rename from rename-source
+    rename to rename-target
     === stat ===
-    file1 | 1 +
+    file1                            | 1 +
-    file2 | 3 ++-
+    file2                            | 3 ++-
-    2 files changed, 3 insertions(+), 1 deletion(-)
+    {rename-source => rename-target} | 0
+    3 files changed, 3 insertions(+), 1 deletion(-)
     === summary ===
     M file1
     M file2
+    R {rename-source => rename-target}
     "###);
 
     // color labels
@@ -1022,6 +1034,7 @@ fn test_log_diff_predefined_formats() {
     <<log diff color_words header::Modified regular file file2:>>
     <<log diff color_words removed line_number::   1>><<log diff color_words:: >><<log diff color_words added line_number::   1>><<log diff color_words::: >><<log diff color_words removed token::a>><<log diff color_words added token::b>><<log diff color_words::>>
     <<log diff color_words::     >><<log diff color_words added line_number::   2>><<log diff color_words::: >><<log diff color_words added token::c>>
+    <<log diff color_words header::Modified regular file rename-target (rename-source => rename-target):>>
     <<log::=== git ===>>
     <<log diff git file_header::diff --git a/file1 b/file1>>
     <<log diff git file_header::index 422c2b7ab3..de980441c3 100644>>
@@ -1039,13 +1052,18 @@ fn test_log_diff_predefined_formats() {
     <<log diff git removed::->><<log diff git removed token::a>><<log diff git removed::>>
     <<log diff git added::+>><<log diff git added token::b>><<log diff git added::>>
     <<log diff git added::+>><<log diff git added token::c>>
+    <<log diff git file_header::diff --git a/rename-source b/rename-target>>
+    <<log diff git file_header::rename from rename-source>>
+    <<log diff git file_header::rename to rename-target>>
     <<log::=== stat ===>>
-    <<log diff stat::file1 | 1 >><<log diff stat added::+>><<log diff stat removed::>>
+    <<log diff stat::file1                            | 1 >><<log diff stat added::+>><<log diff stat removed::>>
-    <<log diff stat::file2 | 3 >><<log diff stat added::++>><<log diff stat removed::->>
+    <<log diff stat::file2                            | 3 >><<log diff stat added::++>><<log diff stat removed::->>
-    <<log diff stat stat-summary::2 files changed, 3 insertions(+), 1 deletion(-)>>
+    <<log diff stat::{rename-source => rename-target} | 0>><<log diff stat removed::>>
+    <<log diff stat stat-summary::3 files changed, 3 insertions(+), 1 deletion(-)>>
     <<log::=== summary ===>>
     <<log diff summary modified::M file1>>
     <<log diff summary modified::M file2>>
+    <<log diff summary renamed::R {rename-source => rename-target}>>
     "###);
 
     // cwd != workspace root
@@ -1062,6 +1080,7 @@ fn test_log_diff_predefined_formats() {
     Modified regular file repo/file2:
        1    1: ab
             2: c
+    Modified regular file repo/rename-target (repo/rename-source => repo/rename-target):
     === git ===
     diff --git a/file1 b/file1
     index 422c2b7ab3..de980441c3 100644
@@ -1079,13 +1098,18 @@ fn test_log_diff_predefined_formats() {
     -a
     +b
     +c
+    diff --git a/rename-source b/rename-target
+    rename from rename-source
+    rename to rename-target
     === stat ===
-    repo/file1 | 1 +
+    repo/file1                            | 1 +
-    repo/file2 | 3 ++-
+    repo/file2                            | 3 ++-
-    2 files changed, 3 insertions(+), 1 deletion(-)
+    repo/{rename-source => rename-target} | 0
+    3 files changed, 3 insertions(+), 1 deletion(-)
     === summary ===
     M repo/file1
     M repo/file2
+    R repo/{rename-source => rename-target}
     "###);
 
     // color_words() with parameters