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

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)