Subject: [PATCH v3 0/6] Send help text from "git cmd -h" to stdout

From: Junio C Hamano <[email-masked]>
Date: Wed, 15 Jan 2025 17:25:17 -0800

Jonas Konrad noticed[*] that "git branch -h" started showing the help
text to the standard error stream.  It turns out that we are fairly
inconsistent in our implementation of "git cmd -h".  The users of
parse-options API will get "If -h is the only option on the command
line, give the help text to the standard output" for free, but some
commands manually check for the condition and then call the
usage_with_options() function, which gives the identical help text
to the standard error stream.  And "git branch -h" Jonas noticed was
one of them.

Older commands written before parse-options API became dominant show
the help text by calling the usage() function, which is meant to be
used when they fail to parse their command line arguments, which has
the same problem.  An explicit request for help text "git cmd -h"
should be fulfilled by showing the help on the standard output.

This series teachs "git $cmd -h" to send its help text to the
standard output stream consistently for built-in commands.

[Reference]

https://lore.kernel.org/git/[email-masked]/

Jeff King (1):
  t0012: optionally check that "-h" output goes to stdout

Junio C Hamano (5):
  parse-options: add show_usage_help_and_exit_if_asked()
  builtins: send usage_with_options() help text to standard output
  usage: add show_usage_and_exit_if_asked()
  builtin: send usage() help text to standard output
  builtin: send usage() help text to standard output

 builtin/am.c                |  3 +--
 builtin/branch.c            |  4 ++--
 builtin/check-ref-format.c  |  4 ++--
 builtin/checkout--worker.c  |  6 +++---
 builtin/checkout-index.c    |  6 +++---
 builtin/commit-tree.c       |  4 ++--
 builtin/commit.c            |  8 ++++----
 builtin/credential.c        |  3 ++-
 builtin/diff-files.c        |  3 +--
 builtin/diff-index.c        |  3 +--
 builtin/diff-tree.c         |  3 +--
 builtin/fast-import.c       |  3 +--
 builtin/fetch-pack.c        |  3 +++
 builtin/fsmonitor--daemon.c |  4 ++--
 builtin/gc.c                |  4 ++--
 builtin/get-tar-commit-id.c |  4 +++-
 builtin/index-pack.c        |  3 +--
 builtin/ls-files.c          |  4 ++--
 builtin/mailsplit.c         |  4 ++--
 builtin/merge-index.c       |  7 ++++++-
 builtin/merge-ours.c        |  3 +--
 builtin/merge-recursive.c   |  6 ++++++
 builtin/merge.c             |  4 ++--
 builtin/pack-redundant.c    |  3 +--
 builtin/rebase.c            |  6 +++---
 builtin/remote-ext.c        |  2 ++
 builtin/remote-fd.c         |  1 +
 builtin/rev-list.c          |  3 +--
 builtin/rev-parse.c         |  2 ++
 builtin/unpack-file.c       |  8 ++++++--
 builtin/unpack-objects.c    |  2 ++
 builtin/update-index.c      |  4 ++--
 builtin/upload-archive.c    |  6 +++---
 builtin/var.c               |  1 +
 git-compat-util.h           |  2 ++
 parse-options.c             | 10 ++++++++++
 parse-options.h             |  4 ++++
 t/helper/test-simple-ipc.c  |  4 ++--
 t/t0012-help.sh             |  3 ++-
 t/t7600-merge.sh            |  2 +-
 usage.c                     | 28 +++++++++++++++++++++++++---
 41 files changed, 123 insertions(+), 64 deletions(-)

-- 
2.48.1-191-gafe818080f