[PATCH 0/5] submodule: add 'reversive' traversal options to foreach

This series introduces robust post-order (dependency-ordered) traversal to `git submodule foreach` through three new flags: `--reverse-traversal`, `--append-superproject`, and the shorthand `--reversive`. These options allow users to process nested submodules before their parents and include the superproject in the operation, enabling reliable automation for dependency-ordered cleanup, builds, and deployment workflows.

Highlights:
- Implements all new traversal flags in both the C helper and shell script.
- Provides a comprehensive test suite (t7425) that validates the new behaviors.
- Updates documentation to describe the new options and their intended use.

These changes make submodule automation more powerful and flexible for advanced and dependency-sensitive use cases.

William Hatfield (5):
  t7425: add tests for reversive submodule traversal
  submodule: teach and plumb reverse-traversal behavior
  submodule: teach and plumb append-superproject behavior
  submodule: introduce reversive shorthand mode
  doc: document reversive traversal and related modes

 Documentation/git-submodule.adoc |  20 ++
 builtin/submodule--helper.c      |  98 ++++++++--
 git-submodule.sh                 |  13 ++
 t/meson.build                    |   1 +
 t/t7425-submodule-reversion.sh   | 314 +++++++++++++++++++++++++++++++
 5 files changed, 435 insertions(+), 11 deletions(-)
 create mode 100755 t/t7425-submodule-reversion.sh