Hi,

On Tue, 13 Nov 2018, Tanushree Tumane wrote:

> From: tanushree27 <tanushreetum...@gmail.com>
> 
> when we cherrypick an existing commit it doesn't change anything and
> therefore it fails prompting to reset (skip commit) or commit using
> --allow-empty attribute and then continue.

This is a nice paragraph, but it might make sense to connect it to the
commit's oneline somehow. I, for one, was surprised to see the oneline
talk about `git commit` and the commit message about `git cherry-pick`.

I could imagine that an introductory paragraph, talking about why one
might want to commit empty commits, might be the best lead into the
subject, and the paragraph about `cherry-pick` could follow (and be
introduced by saying something along the lines that this config setting
has more reach than just `git commit`; it also affects `git cherry-pick`)?

Ciao,
Johannes

> 
> Add commit.allowEmpty configuration variable as a convenience to skip
> this process.
> 
> Add tests to check the behavior introduced by this commit.
> 
> This closes https://github.com/git-for-windows/git/issues/1854
> 
> Signed-off-by: tanushree27 <tanushreetum...@gmail.com>
> Signed-off-by: Tanushree Tumane <tanushreetum...@gmail.com>
> ---
>  Documentation/config.txt     |  5 +++++
>  Documentation/git-commit.txt |  3 ++-
>  builtin/commit.c             |  8 ++++++++
>  t/t3500-cherry.sh            | 10 ++++++++++
>  4 files changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index c0727b7866..f3828518a5 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -1467,6 +1467,11 @@ commit.verbose::
>       A boolean or int to specify the level of verbose with `git commit`.
>       See linkgit:git-commit[1].
>  
> +commit.allowEmpty::
> +     A boolean to specify whether empty commits are allowed with `git
> +     commit`. See linkgit:git-commit[1]. 
> +     Defaults to false.
> +
>  credential.helper::
>       Specify an external helper to be called when a username or
>       password credential is needed; the helper may consult external
> diff --git a/Documentation/git-commit.txt b/Documentation/git-commit.txt
> index f970a43422..5d3bbf017a 100644
> --- a/Documentation/git-commit.txt
> +++ b/Documentation/git-commit.txt
> @@ -176,7 +176,8 @@ The `-m` option is mutually exclusive with `-c`, `-C`, 
> and `-F`.
>       Usually recording a commit that has the exact same tree as its
>       sole parent commit is a mistake, and the command prevents you
>       from making such a commit.  This option bypasses the safety, and
> -     is primarily for use by foreign SCM interface scripts.
> +     is primarily for use by foreign SCM interface scripts. See
> +     `commit.allowEmpty` in linkgit:git-config[1].
>  
>  --allow-empty-message::
>         Like --allow-empty this command is primarily for use by foreign
> diff --git a/builtin/commit.c b/builtin/commit.c
> index 67fa949204..4516309ac2 100644
> --- a/builtin/commit.c
> +++ b/builtin/commit.c
> @@ -101,6 +101,7 @@ static int all, also, interactive, patch_interactive, 
> only, amend, signoff;
>  static int edit_flag = -1; /* unspecified */
>  static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
>  static int config_commit_verbose = -1; /* unspecified */
> +static int config_commit_allow_empty = -1; /* unspecified */
>  static int no_post_rewrite, allow_empty_message;
>  static char *untracked_files_arg, *force_date, *ignore_submodule_arg, 
> *ignored_arg;
>  static char *sign_commit;
> @@ -1435,6 +1436,10 @@ static int git_commit_config(const char *k, const char 
> *v, void *cb)
>               config_commit_verbose = git_config_bool_or_int(k, v, &is_bool);
>               return 0;
>       }
> +     if (!strcmp(k, "commit.allowempty")) {
> +             config_commit_allow_empty = git_config_bool(k, v);
> +             return 0;
> +     }
>  
>       status = git_gpg_config(k, v, NULL);
>       if (status)
> @@ -1556,6 +1561,9 @@ int cmd_commit(int argc, const char **argv, const char 
> *prefix)
>       if (verbose == -1)
>               verbose = (config_commit_verbose < 0) ? 0 : 
> config_commit_verbose;
>  
> +     if (config_commit_allow_empty >= 0)  /* if allowEmpty is allowed in 
> config*/
> +             allow_empty = config_commit_allow_empty;
> +     
>       if (dry_run)
>               return dry_run_commit(argc, argv, prefix, current_head, &s);
>       index_file = prepare_index(argc, argv, prefix, current_head, 0);
> diff --git a/t/t3500-cherry.sh b/t/t3500-cherry.sh
> index f038f34b7c..11504e2d9f 100755
> --- a/t/t3500-cherry.sh
> +++ b/t/t3500-cherry.sh
> @@ -55,4 +55,14 @@ test_expect_success \
>       expr "$(echo $(git cherry master my-topic-branch) )" : "+ [^ ]* - .*"
>  '
>  
> +
> +# Tests for commit.allowEmpty config
> +
> +test_expect_success 'cherry-pick existing commit with commit.allowEmpty' '
> +    test_tick &&
> +     test_commit "first" &&
> +     test_commit "second" &&
> +     git -c commit.allowEmpty=true cherry-pick HEAD~1
> +'
> +
>  test_done
> -- 
> 2.19.1.windows.1.495.g7e9d1c442b.dirty
> 
> 

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