Jeff King <peff@xxxxxxxx> writes:
> Subject: [PATCH] mailmap: default mailmap.blob in bare repositories
>
> The motivation for mailmap.blob is to let users of bare
> repositories use the mailmap feature, as they would not have
> a checkout containing the .mailmap file. We can make it even
> easier for them by just looking in HEAD:.mailmap by default.
>
> We can't know for sure that this is where they would keep a
> mailmap, of course, but it is the best guess (and it matches
> the non-bare behavior, which reads from HEAD:.mailmap in the
> working tree). If it's missing, git will silently ignore the
> setting.
>
> We do not do the same magic in the non-bare case, because:
>
> 1. In the common case, HEAD:.mailmap will be the same as
> the .mailmap in the working tree, which is a no-op.
>
> 2. In the uncommon case, the user has modified .mailmap
> but not yet committed it, and would expect the working
> tree version to take precedence.
>
> Signed-off-by: Jeff King <peff@xxxxxxxx>
> ---
> I went with defaulting mailmap.blob, because it provides an easy path
> for turning off the feature (you just override mailmap.blob).
Very sensibly explained. I like it when people clearly explain the
thinking behind the change in the log message.
Thanks, will queue.
> Documentation/config.txt | 8 +++++---
> mailmap.c | 5 +++++
> t/t4203-mailmap.sh | 25 +++++++++++++++++++++++++
> 3 files changed, 35 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index 3760077..1a3c554 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -1519,9 +1519,11 @@ mailmap.blob::
>
> mailmap.blob::
> Like `mailmap.file`, but consider the value as a reference to a
> - blob in the repository (e.g., `HEAD:.mailmap`). If both
> - `mailmap.file` and `mailmap.blob` are given, both are parsed,
> - with entries from `mailmap.file` taking precedence.
> + blob in the repository. If both `mailmap.file` and
> + `mailmap.blob` are given, both are parsed, with entries from
> + `mailmap.file` taking precedence. In a bare repository, this
> + defaults to `HEAD:.mailmap`. In a non-bare repository, it
> + defaults to empty.
>
> man.viewer::
> Specify the programs that may be used to display help in the
> diff --git a/mailmap.c b/mailmap.c
> index 5ffe48a..b16542f 100644
> --- a/mailmap.c
> +++ b/mailmap.c
> @@ -233,7 +233,12 @@ int read_mailmap(struct string_list *map, char **repo_abbrev)
> int read_mailmap(struct string_list *map, char **repo_abbrev)
> {
> int err = 0;
> +
> map->strdup_strings = 1;
> +
> + if (!git_mailmap_blob && is_bare_repository())
> + git_mailmap_blob = "HEAD:.mailmap";
> +
> err |= read_mailmap_file(map, ".mailmap", repo_abbrev);
> err |= read_mailmap_blob(map, git_mailmap_blob, repo_abbrev);
> err |= read_mailmap_file(map, git_mailmap_file, repo_abbrev);
> diff --git a/t/t4203-mailmap.sh b/t/t4203-mailmap.sh
> index e7ea40c..aae30d9 100755
> --- a/t/t4203-mailmap.sh
> +++ b/t/t4203-mailmap.sh
> @@ -218,6 +218,31 @@ test_expect_success 'mailmap.blob can be missing' '
> test_cmp expect actual
> '
>
> +test_expect_success 'mailmap.blob defaults to off in non-bare repo' '
> + git init non-bare &&
> + (
> + cd non-bare &&
> + test_commit one .mailmap "Fake Name <author@xxxxxxxxxxx>" &&
> + echo " 1 Fake Name" >expect &&
> + git shortlog -ns HEAD >actual &&
> + test_cmp expect actual &&
> + rm .mailmap &&
> + echo " 1 A U Thor" >expect &&
> + git shortlog -ns HEAD >actual &&
> + test_cmp expect actual
> + )
> +'
> +
> +test_expect_success 'mailmap.blob defaults to HEAD:.mailmap in bare repo' '
> + git clone --bare non-bare bare &&
> + (
> + cd bare &&
> + echo " 1 Fake Name" >expect &&
> + git shortlog -ns HEAD >actual &&
> + test_cmp expect actual
> + )
> +'
> +
> test_expect_success 'cleanup after mailmap.blob tests' '
> rm -f .mailmap
> '
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