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pr-539/hanwen/reftable-v17

This adds the reftable library, and hooks it up as a ref backend. Based on
hn/refs-cleanup.

Includes testing support, to test: make -C t/ GIT_TEST_REFTABLE=1

Summary 20816 tests pass 1122 tests fail

Some issues:

 * many tests inspect .git/{logs,heads}/ directly.
 * worktrees broken.

v20

 * various reflog fixes; @{-1} now works
 * more debug output for GIT_DEBUG_REFS
 * reftable's slice class is now equivalent to strbuf
 * add test-tool dump-reftable.

Han-Wen Nienhuys (16):
  lib-t6000.sh: write tag using git-update-ref
  checkout: add '\n' to reflog message
  Write pseudorefs through ref backends.
  Make refs_ref_exists public
  Treat BISECT_HEAD as a pseudo ref
  Treat CHERRY_PICK_HEAD as a pseudo ref
  Treat REVERT_HEAD as a pseudo ref
  Move REF_LOG_ONLY to refs-internal.h
  Iterate over the "refs/" namespace in for_each_[raw]ref
  Add .gitattributes for the reftable/ directory
  Add reftable library
  Reftable support for git-core
  Hookup unittests for the reftable library.
  Add GIT_DEBUG_REFS debugging mechanism
  Add reftable testing infrastructure
  Add "test-tool dump-reftable" command.

Johannes Schindelin (1):
  vcxproj: adjust for the reftable changes

 .../technical/repository-version.txt          |    7 +
 Makefile                                      |   47 +-
 builtin/bisect--helper.c                      |    3 +-
 builtin/checkout.c                            |    5 +-
 builtin/clone.c                               |    3 +-
 builtin/commit.c                              |   34 +-
 builtin/init-db.c                             |   56 +-
 builtin/merge.c                               |    2 +-
 cache.h                                       |    6 +-
 config.mak.uname                              |    2 +-
 contrib/buildsystems/Generators/Vcxproj.pm    |   11 +-
 git-bisect.sh                                 |    4 +-
 path.c                                        |    2 -
 path.h                                        |    9 +-
 refs.c                                        |  157 +-
 refs.h                                        |   16 +
 refs/debug.c                                  |  358 +++++
 refs/files-backend.c                          |  121 +-
 refs/packed-backend.c                         |   21 +-
 refs/refs-internal.h                          |   32 +
 refs/reftable-backend.c                       | 1327 +++++++++++++++++
 reftable/.gitattributes                       |    1 +
 reftable/LICENSE                              |   31 +
 reftable/README.md                            |   11 +
 reftable/VERSION                              |    1 +
 reftable/basics.c                             |  215 +++
 reftable/basics.h                             |   53 +
 reftable/block.c                              |  437 ++++++
 reftable/block.h                              |  129 ++
 reftable/block_test.c                         |  157 ++
 reftable/compat.c                             |   97 ++
 reftable/compat.h                             |   48 +
 reftable/constants.h                          |   21 +
 reftable/dump.c                               |  212 +++
 reftable/file.c                               |   95 ++
 reftable/iter.c                               |  242 +++
 reftable/iter.h                               |   72 +
 reftable/merged.c                             |  320 ++++
 reftable/merged.h                             |   39 +
 reftable/merged_test.c                        |  273 ++++
 reftable/pq.c                                 |  113 ++
 reftable/pq.h                                 |   34 +
 reftable/reader.c                             |  742 +++++++++
 reftable/reader.h                             |   65 +
 reftable/record.c                             | 1118 ++++++++++++++
 reftable/record.h                             |  128 ++
 reftable/record_test.c                        |  403 +++++
 reftable/refname.c                            |  211 +++
 reftable/refname.h                            |   38 +
 reftable/refname_test.c                       |   99 ++
 reftable/reftable-tests.h                     |   22 +
 reftable/reftable.c                           |   90 ++
 reftable/reftable.h                           |  571 +++++++
 reftable/reftable_test.c                      |  631 ++++++++
 reftable/slice.c                              |  217 +++
 reftable/slice.h                              |   85 ++
 reftable/slice_test.c                         |   39 +
 reftable/stack.c                              | 1214 +++++++++++++++
 reftable/stack.h                              |   48 +
 reftable/stack_test.c                         |  787 ++++++++++
 reftable/system.h                             |   55 +
 reftable/test_framework.c                     |   69 +
 reftable/test_framework.h                     |   64 +
 reftable/tree.c                               |   63 +
 reftable/tree.h                               |   34 +
 reftable/tree_test.c                          |   62 +
 reftable/update.sh                            |   22 +
 reftable/writer.c                             |  661 ++++++++
 reftable/writer.h                             |   60 +
 reftable/zlib-compat.c                        |   92 ++
 repository.c                                  |    2 +
 repository.h                                  |    3 +
 sequencer.c                                   |   56 +-
 setup.c                                       |   12 +-
 t/helper/test-reftable.c                      |   20 +
 t/helper/test-tool.c                          |    2 +
 t/helper/test-tool.h                          |    2 +
 t/lib-t6000.sh                                |    5 +-
 t/t0031-reftable.sh                           |  160 ++
 t/t0033-debug-refs.sh                         |   18 +
 t/t1409-avoid-packing-refs.sh                 |    6 +
 t/t1450-fsck.sh                               |    6 +
 t/t3210-pack-refs.sh                          |    6 +
 t/t9903-bash-prompt.sh                        |    6 +
 t/test-lib.sh                                 |    5 +
 wt-status.c                                   |    6 +-
 86 files changed, 12629 insertions(+), 200 deletions(-)
 create mode 100644 refs/debug.c
 create mode 100644 refs/reftable-backend.c
 create mode 100644 reftable/.gitattributes
 create mode 100644 reftable/LICENSE
 create mode 100644 reftable/README.md
 create mode 100644 reftable/VERSION
 create mode 100644 reftable/basics.c
 create mode 100644 reftable/basics.h
 create mode 100644 reftable/block.c
 create mode 100644 reftable/block.h
 create mode 100644 reftable/block_test.c
 create mode 100644 reftable/compat.c
 create mode 100644 reftable/compat.h
 create mode 100644 reftable/constants.h
 create mode 100644 reftable/dump.c
 create mode 100644 reftable/file.c
 create mode 100644 reftable/iter.c
 create mode 100644 reftable/iter.h
 create mode 100644 reftable/merged.c
 create mode 100644 reftable/merged.h
 create mode 100644 reftable/merged_test.c
 create mode 100644 reftable/pq.c
 create mode 100644 reftable/pq.h
 create mode 100644 reftable/reader.c
 create mode 100644 reftable/reader.h
 create mode 100644 reftable/record.c
 create mode 100644 reftable/record.h
 create mode 100644 reftable/record_test.c
 create mode 100644 reftable/refname.c
 create mode 100644 reftable/refname.h
 create mode 100644 reftable/refname_test.c
 create mode 100644 reftable/reftable-tests.h
 create mode 100644 reftable/reftable.c
 create mode 100644 reftable/reftable.h
 create mode 100644 reftable/reftable_test.c
 create mode 100644 reftable/slice.c
 create mode 100644 reftable/slice.h
 create mode 100644 reftable/slice_test.c
 create mode 100644 reftable/stack.c
 create mode 100644 reftable/stack.h
 create mode 100644 reftable/stack_test.c
 create mode 100644 reftable/system.h
 create mode 100644 reftable/test_framework.c
 create mode 100644 reftable/test_framework.h
 create mode 100644 reftable/tree.c
 create mode 100644 reftable/tree.h
 create mode 100644 reftable/tree_test.c
 create mode 100755 reftable/update.sh
 create mode 100644 reftable/writer.c
 create mode 100644 reftable/writer.h
 create mode 100644 reftable/zlib-compat.c
 create mode 100644 t/helper/test-reftable.c
 create mode 100755 t/t0031-reftable.sh
 create mode 100755 t/t0033-debug-refs.sh

base-commit: bcb73516bf1f7fd16f882782d42250dd19f39b85

Submitted-As: https://lore.kernel.org/git/pull.539.v17.git.1592335242.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.git.1579808479.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v2.git.1580134944.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v3.git.1580848060.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v4.git.1581029756.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v5.git.1581344060.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v6.git.1582015420.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v7.git.1582706986.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v8.git.1585740538.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v9.git.1587417295.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v10.git.1588018418.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v11.git.1588619028.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v12.git.1588845585.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v13.git.1589226388.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v14.git.1589833884.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v15.git.1590695209.gitgitgadget@gmail.com
In-Reply-To: https://lore.kernel.org/git/pull.539.v16.git.1591380199.gitgitgadget@gmail.com
Assets 2