Re: [PATCH v3] rebase: remove the rebase.useBuiltin setting

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

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Hi Ævar,

On Fri, 15 Mar 2019, Ævar Arnfjörð Bjarmason wrote:

> Remove the rebase.useBuiltin setting, which was added as an escape
> hatch to disable the builtin version of rebase first released with Git
> 2.20.
> 
> See [1] for the initial implementation of rebase.useBuiltin, and [2]
> and [3] for the documentation and corresponding
> GIT_TEST_REBASE_USE_BUILTIN option.
> 
> Carrying the legacy version is a maintenance burden as seen in
> 7e097e27d3 ("legacy-rebase: backport -C<n> and --whitespace=<option>
> checks", 2018-11-20) and 9aea5e9286 ("rebase: fix regression in
> rebase.useBuiltin=false test mode", 2019-02-13). Since the built-in
> version has been shown to be stable enough let's remove the legacy
> version.
> 
> As noted in [3] having use_builtin_rebase() shell out to get its
> config doesn't make any sense anymore, that was done for the purposes
> of spawning the legacy rebase without having modified any global
> state. Let's instead handle this case in rebase_config().
> 
> There's still a bunch of references to git-legacy-rebase in po/*.po,
> but those will be dealt with in time by the i18n effort.
> 
> Even though this configuration variable only existed for one release
> let's not entirely delete the entry from the docs, but note its
> absence. Individual versions of git tend to be around for a while due
> to distro packaging timelines, so e.g. if we're "lucky" a given
> version like 2.21 might be installed on say OSX for half a decade.
> 
> That'll mean some people probably setting this in config, and then
> when they later wonder if it's needed they can Google search the
> config option name or check it in git-config. It also allows us to
> refer to the docs from the warning for details.
> 
> 1. 55071ea248 ("rebase: start implementing it as a builtin",
>    2018-08-07)
> 2. d8d0a546f0 ("rebase doc: document rebase.useBuiltin", 2018-11-14)
> 3. 62c23938fa ("tests: add a special setup where rebase.useBuiltin is
>    off", 2018-11-14)
> 3. https://public-inbox.org/git/nycvar.QRO.7.76.6.1903141544110.41@tvgsbejvaqbjf.bet/
> ---

With the obviously intended SOB line: ACK!

Ciao,
Dscho