[pull] master from git:master

.gitignore

@@ -87,6 +87,7 @@
 /git-init-db
 /git-interpret-trailers
 /git-instaweb
+/git-last-modified
 /git-log
 /git-ls-files
 /git-ls-remote

Documentation/RelNotes/2.52.0.adoc

@@ -14,6 +14,9 @@ UI, Workflows & Features
  * A new subcommand "git repo" gives users a way to grab various
    repository characteristics.
 
+ * A new command "git last-modified" has been added to show the closest
+   ancestor commit that touched each path.
+
 
 Performance, Internal Implementation, Development Support etc.
 --------------------------------------------------------------
@@ -40,6 +43,10 @@ Performance, Internal Implementation, Development Support etc.
  * Discord has been added to the first contribution documentation as
    another way to ask for help.
 
+ * Inspired by Ezekiel's recent effort to showcase Rust interface, the
+   hash function implementation used to hash lines have been updated
+   to the one used for ELF symbol lookup by Glibc.
+
 
 Fixes since v2.51
 -----------------
@@ -130,6 +137,20 @@ including security updates, are included in this release.
    instead of `gitgitgadget/git`.
    (merge 37001cdbc4 ds/doc-ggg-pr-fork-clarify later to maint).
 
+ * Makefile tried to run multiple "cargo build" which would not work
+   very well; serialize their execution to work it around.
+   (merge 0eeacde50e da/cargo-serialize later to maint).
+
+ * "git repack --path-walk" lost objects in some corner cases, which
+   has been corrected.
+   (merge 93afe9b060 ds/path-walk-repack-fix later to maint).
+
+ * "git ls-files <pathspec>..." should not necessarily have to expand
+   the index fully if a sparsified directory is excluded by the
+   pathspec; the code is taught to expand the index on demand to avoid
+   this.
+   (merge 681f26bccc ds/ls-files-lazy-unsparse later to maint).
+
  * Other code cleanup, docfix, build fix, etc.
    (merge 823d537fa7 kh/doc-git-log-markup-fix later to maint).
    (merge cf7efa4f33 rj/t6137-cygwin-fix later to maint).

Documentation/git-last-modified.adoc

@@ -0,0 +1,54 @@
+git-last-modified(1)
+====================
+
+NAME
+----
+git-last-modified - EXPERIMENTAL: Show when files were last modified
+
+
+SYNOPSIS
+--------
+[synopsis]
+git last-modified [--recursive] [--show-trees] [<revision-range>] [[--] <path>...]
+
+DESCRIPTION
+-----------
+
+Shows which commit last modified each of the relevant files and subdirectories.
+A commit renaming a path, or changing it's mode is also taken into account.
+
+THIS COMMAND IS EXPERIMENTAL. THE BEHAVIOR MAY CHANGE.
+
+OPTIONS
+-------
+
+`-r`::
+`--recursive`::
+	Instead of showing tree entries, step into subtrees and show all entries
+	inside them recursively.
+
+`-t`::
+`--show-trees`::
+	Show tree entries even when recursing into them. It has no effect
+	without `--recursive`.
+
+`<revision-range>`::
+	Only traverse commits in the specified revision range. When no
+	`<revision-range>` is specified, it defaults to `HEAD` (i.e. the whole
+	history leading to the current commit). For a complete list of ways to
+	spell `<revision-range>`, see the 'Specifying Ranges' section of
+	linkgit:gitrevisions[7].
+
+`[--] <path>...`::
+	For each _<path>_ given, the commit which last modified it is returned.
+	Without an optional path parameter, all files and subdirectories
+	in path traversal the are included in the output.
+
+SEE ALSO
+--------
+linkgit:git-blame[1],
+linkgit:git-log[1].
+
+GIT
+---
+Part of the linkgit:git[1] suite

Documentation/meson.build

@@ -74,6 +74,7 @@ manpages = {
   'git-init.adoc' : 1,
   'git-instaweb.adoc' : 1,
   'git-interpret-trailers.adoc' : 1,
+  'git-last-modified.adoc' : 1,
   'git-log.adoc' : 1,
   'git-ls-files.adoc' : 1,
   'git-ls-remote.adoc' : 1,

Makefile

@@ -1265,6 +1265,7 @@ BUILTIN_OBJS += builtin/hook.o
 BUILTIN_OBJS += builtin/index-pack.o
 BUILTIN_OBJS += builtin/init-db.o
 BUILTIN_OBJS += builtin/interpret-trailers.o
+BUILTIN_OBJS += builtin/last-modified.o
 BUILTIN_OBJS += builtin/log.o
 BUILTIN_OBJS += builtin/ls-files.o
 BUILTIN_OBJS += builtin/ls-remote.o
@@ -3945,13 +3946,12 @@ unit-tests: $(UNIT_TEST_PROGS) $(CLAR_TEST_PROG) t/helper/test-tool$X
 	$(MAKE) -C t/ unit-tests
 
 .PHONY: libgit-sys libgit-rs
-libgit-sys libgit-rs:
-	$(QUIET)(\
-		cd contrib/$@ && \
-		cargo build \
-	)
+libgit-sys:
+	$(QUIET)cargo build --manifest-path contrib/libgit-sys/Cargo.toml
+libgit-rs: libgit-sys
+	$(QUIET)cargo build --manifest-path contrib/libgit-rs/Cargo.toml
 ifdef INCLUDE_LIBGIT_RS
-all:: libgit-sys libgit-rs
+all:: libgit-rs
 endif
 
 LIBGIT_PUB_OBJS += contrib/libgit-sys/public_symbol_export.o

builtin.h

@@ -176,6 +176,7 @@ int cmd_hook(int argc, const char **argv, const char *prefix, struct repository
 int cmd_index_pack(int argc, const char **argv, const char *prefix, struct repository *repo);
 int cmd_init_db(int argc, const char **argv, const char *prefix, struct repository *repo);
 int cmd_interpret_trailers(int argc, const char **argv, const char *prefix, struct repository *repo);
+int cmd_last_modified(int argc, const char **argv, const char *prefix, struct repository *repo);
 int cmd_log_reflog(int argc, const char **argv, const char *prefix, struct repository *repo);
 int cmd_log(int argc, const char **argv, const char *prefix, struct repository *repo);
 int cmd_ls_files(int argc, const char **argv, const char *prefix, struct repository *repo);