Re: [PATCH v2 0/2] add-p P fixups

["Rubén Justo" <rjusto@gmail.com>]

On Tue, Jul 23, 2024 at 10:15:03AM +0100, Phillip Wood wrote:
> Hi Rubén
> 
> These changes themselves look sensible.

Glad to hear that.

> As rj/add-p-pager is only in seen I
> assume you'll re-roll with these squashed in once everyone is happy?

Junio has already integrated these changes into the branch he has in his
tree, including a small change to the message to adjust it to his
comments, which I think is good. 

I hope that what we already have in Junio's tree is the final iteration
of this long series and that we can let it settle before making further
changes. 

> 
> Best Wishes
> 
> Phillip
> 
> On 23/07/2024 01:39, Rubén Justo wrote:
> > Rubén Justo (1):
> >    t3701: avoid one-shot export for shell functions
> >    pager: make wait_for_pager a no-op for "cat"
> > 
> >   pager.c                    | 3 +++
> >   t/t3701-add-interactive.sh | 6 +++++-
> >   2 files changed, 8 insertions(+), 1 deletion(-)
> > 
> > Range-diff against v1:
> > 1:  c3b8ebbae7 ! 1:  15fbf82fff t3701: avoid one-shot export for shell functions
> >      @@ Commit message
> >               VAR=VAL command args
> >      -    it's a common way to define one-shot variables within the scope of
> >      +    is a common way to set and export one-shot variables within the scope of
> >           executing a "command".
> >           However, when "command" is a function which in turn executes the
> >      @@ Commit message
> >               $ A=1 f
> >               A=
> >      +    Note that POSIX is not specific about this behavior:
> >      +
> >      +    http://www.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_09_01
> >      +
> >           One of our CI jobs on GitHub Actions uses Ubuntu 20.04 running dash
> >           0.5.10.2-6, so we failed the test t3701:51;  the "git add -p" being
> >           tested did not get our custom GIT_PAGER, which broke the test.
> > 2:  f45455f1ff ! 2:  b87c3d96e4 pager: make wait_for_pager a no-op for "cat"
> >      @@ Commit message
> >           "cat" [*2*], then we return from `setup_pager()` silently without doing
> >           anything, allowing the output to go directly to the normal stdout.
> >      -    Let's make the call to `wait_for_pager()` for these cases, or any other
> >      -    future optimizations that may occur, also exit silently without doing
> >      -    anything.
> >      +    If `setup_pager()` avoids forking a pager, then when the client calls
> >      +    the corresponding `wait_for_pager()`, we might fail trying to terminate
> >      +    a process that wasn't started.
> >      +
> >      +    One solution to avoid this problem could be to make the caller aware
> >      +    that `setup_pager()` did nothing, so it could avoid calling
> >      +    `wait_for_pager()`.
> >      +
> >      +    However, let's avoid shifting that responsibility to the caller and
> >      +    instead treat the call to `wait_for_pager()` as a no-op when we know we
> >      +    haven't forked a pager.
> >              1.- 402461aab1 (pager: do not fork a pager if PAGER is set to empty.,
> >                              2006-04-16)