[PATCH 0/1] repo: add filtering options to "repo structure"

["Mark C. Chu-Carroll" <markchucarroll@fastmail.com>]

    repo: add filtering options to "repo structure"

    "git repo structure" provides a collection of useful information
    about the information stored in a repo. In particular, it's
    valuable for diagnosing performance issues caused by large objects
    stored in a repo.

    The current implementation of "git repo stucture" provides summary
    information about everything in the repository - all of the
    branches, remotes, tags, stashes, and notes. But sometimes
    to properly diagnose a problem, it's useful to be able to exclude
    refs that are known to not be relevant to the issue at hand.

    Add a set of flags that allow a user to selective exclude
    reference types from the report generated by "git repo structure".
    When a ref type is excluded by the filter, it no longer appears
    in the report (ie, if "--no-tags" is passed, the report line
    for "Branches" will no longer appear under "* References").
    Following the pattern of flags that are only used to
    disable functionality (eg, "--no-verify" in "builtins/push.c"),
    only the "--no-<reftype>" syntax is listed in the updated
    documentation.

    Overview of the changes:
    - Add an enum to represent the structure flags.
    - Add structure flags to the options for the "repo structure" commands.
    - For each reference flag, add a conditional in "count_references"
      which decides whether or not to add a ref to the pending list.
      If an references is not added to the pending list, the things it
      transitively references will not be added to the stats.
    - Add a set of test cases to verify that reference counts
      in the repo structure report correctly omit the specified
      resource types.
    - Update the documentation for git-repo to include the new options.

Mark C. Chu-Carroll (1):
  repo: add filtering options to "repo structure"

 Documentation/git-repo.adoc |  35 ++++-
 builtin/repo.c              | 158 +++++++++++++++------
 t/t1901-repo-structure.sh   | 276 ++++++++++++++++++++++++++++++++++++
 3 files changed, 427 insertions(+), 42 deletions(-)

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2.53.0