[GSoC][PATCH v16 0/9] ref consistency check infra setup

Hi All, this version handles some minor changes:

1. Remove redundant newlines.
2. Fix typo in commit message.

At last, I wanna thank every reviewer. As we can see, this series starts from 5.27, it's a very long journey. I have learned a lot.

Thanks Jialuo

shejialuo (9):
  fsck: rename "skiplist" to "skip_oids"
  fsck: rename objects-related fsck error functions
  fsck: make "fsck_error" callback generic
  fsck: add a unified interface for reporting fsck messages
  fsck: add refs report function
  refs: set up ref consistency check infrastructure
  builtin/refs: add verify subcommand
  files-backend: add unified interface for refs scanning
  fsck: add ref name check for files backend

 Documentation/fsck-msgids.txt |   6 ++
 Documentation/git-refs.txt    |  13 ++++
 builtin/fsck.c                |  17 +++--
 builtin/mktag.c               |   3 +-
 builtin/refs.c                |  34 +++++++++
 fsck.c                        | 125 +++++++++++++++++++++++++++-------
 fsck.h                        |  76 ++++++++++++++++-----
 object-file.c                 |   9 ++-
 refs.c                        |   5 ++
 refs.h                        |   8 +++
 refs/debug.c                  |  11 +++
 refs/files-backend.c          | 115 ++++++++++++++++++++++++++++++-
 refs/packed-backend.c         |   8 +++
 refs/refs-internal.h          |   6 ++
 refs/reftable-backend.c       |   8 +++
 t/t0602-reffiles-fsck.sh      |  92 +++++++++++++++++++++++++
 16 files changed, 477 insertions(+), 59 deletions(-)
 create mode 100755 t/t0602-reffiles-fsck.sh

Range-diff against v15:
 1:  9aeaa3211c =  1:  9aeaa3211c fsck: rename "skiplist" to "skip_oids"
 2:  7511340a21 =  2:  7511340a21 fsck: rename objects-related fsck error functions
 3:  ee971d17f4 =  3:  ee971d17f4 fsck: make "fsck_error" callback generic
 4:  59ccdab54d !  4:  f80fa00538 fsck: add a unified interface for reporting fsck messages
    @@ Commit message
         "fsck_vreport". Instead of using "...", provide "va_list" to allow more
         flexibility.
     
    -    Instead of changing "report" prototype to be algin with the
    +    Instead of changing "report" prototype to be align with the
         "fsck_vreport" function, we leave the "report" prototype unchanged due
         to the reason that there are nearly 62 references about "report"
         function. Simply change "report" function to use "fsck_vreport" to
 5:  b5607ac61c !  5:  8c0376cfd5 fsck: add refs report function
    @@ fsck.c: int fsck_objects_error_function(struct fsck_options *o,
     +			     const char *message)
     +{
     +	struct fsck_ref_report *report = fsck_report;
    -+
     +	struct strbuf sb = STRBUF_INIT;
     +	int ret = 0;
     +
    @@ fsck.c: int fsck_objects_error_function(struct fsck_options *o,
     +
     +	strbuf_release(&sb);
     +	return ret;
    -+
     +}
     +
      static int fsck_blobs(struct oidset *blobs_found, struct oidset *blobs_done,
 6:  5819406b40 =  6:  552fe62ff4 refs: set up ref consistency check infrastructure
 7:  6a9c194a05 =  7:  3b357fa89e builtin/refs: add verify subcommand
 8:  76406b1303 !  8:  8d2c7b3aa5 files-backend: add unified interface for refs scanning
    @@ refs/files-backend.c: static int files_ref_store_remove_on_disk(struct ref_store
     +	if (o->verbose)
     +		fprintf_ln(stderr, _("Checking references consistency"));
     +	return files_fsck_refs_dir(ref_store, o,  "refs", fsck_refs_fn);
    -+
     +}
     +
      static int files_fsck(struct ref_store *ref_store,
 9:  ed02380516 =  9:  b39533ae56 fsck: add ref name check for files backend