Re: fairywren is generating bogus BASE_BACKUP commands

Hi,

On 2022-01-24 16:47:28 -0500, Andrew Dunstan wrote:
> Give me what you can and I'll see what I can do. I have a couple of
> moderately high priority items on my plate, but I will probably be able
> to fit in some testing when those make my eyes completely glaze over.

Steps:

# install msys from https://www.msys2.org/
# install dependencies in msys shell
pacman -S git bison flex make ucrt64/mingw-w64-ucrt-x86_64-perl ucrt64/mingw-w64-ucrt-x86_64-gcc ucrt64/mingw-w64-ucrt-x86_64-zlib ucrt64/mingw-w64-ucrt-x86_64-ccache diffutils

# start mingw ucrt64 x64 shell
cpan install -T IPC::Run
perl -MIPC::Run -e 1 # verify ipc run is installed

cd /c/dev
# I added --reference postgres to accelerate the cloning
git clone https://git.postgresql.org/git/postgresql.git postgres-mingw
cd /c/dev/postgres-mingw

git revert ed52c3707bcf8858defb0d9de4b55f5c7f18fed7
git revert 6051857fc953a62db318329c4ceec5f9668fd42a

# apply attached patch

# see below why out-of-tree is easier or now
mkdir build
cd build
# path parameters probably not necessary, I thought I needed them earlier, not sure why
../configure --without-readline --cache cache --enable-tap-tests PROVE=/ucrt64/bin/core_perl/prove PERL=/ucrt64/bin/perl.exe CC="ccache gcc"
make -j8 -s world-bin && make -j8 -s -C src/interfaces/ecpg/test
make -j8 -s temp-install

# pg_regress' make_temp_socketdir() otherwise picks up the wrong TMPDIR
mkdir /c/dev/postgres-mingw/build/tmp

# the TAR= ensures that tests pick up a tar accessible with a windows path
# PG_TEST_USE_UNIX_SOCKETS=1 is required for test concurrency, otherwise there are port conflicts

(make -Otarget -j12 check-world NO_TEMP_INSTALL=1 PG_TEST_USE_UNIX_SOCKETS=1 TMPDIR=C:/dev/postgres-mingw/tmp TAR="C:\Windows\System32\tar.exe" 2>&1 && echo test-world-success || echo test-world-fail) 2>&1 |tee test-world.log

To make tests in "in-tree" builds work, a bit more hackery would be
needed. The problem is that windows chooses binaries from the current working
directory *before* PATH. That's a problem for things like initdb.exe or
pg_ctl.exe that want to find postgres.exe, as that only works with the program
in their proper location, rather than CWD.

Greetings,

Andres Freund