MSYS2 is basically Cygwin, except it has more easy installation (but
with tools which are not used) and it has some more control of path
conversion via MSYS2_ARG_CONV_EXCL and MSYS2_ENV_CONV_EXCL. So it
should be more Windows-friendly than Cygwin.
Installation
Similar to Cygwin, except installing patch requires additional command
run from shell:
pacman -S patch
MSYS2 still doesn't work as it returns wierd "Bad address" when
exec-ing forked process from create_process(). Same exec from
standalone perl -e runs just fine... :(
Cygwin is more Unix-oriented. It does not treat \n as \r\n in regexps
(fixed by \R), it supplies Unix-style paths (fixed by
mixed_path()). It does some cleanup on paths when running exe, so it
will be different in exe output (like with $exe_mysqld, comparing
basename() is enough).
Cygwin installation
1. Just install latest perl version (only base package) and
patchutils from cygwin-setup;
2. Don't forget to add c:\cygwin64\bin into system path
before any other perl flavors;
3. There is path-style conflict (see below), you must replace
c:\cygwin64\bin\sh.exe with the wrapper. Run MTR with
--cygwin-subshell-fix=do for that. Make sure you are running Cygwin
perl for the option to work.
4. Restart buildbot via net stop buildbot; net start buildbot
Path-style conflict of Cygwin-ish Perl
Some exe paths are passed to mysqltest which are executed by a native
call. This requires native-style paths (\-style). These exe paths also
executed by Perl itself. Either by MTR itself which is not so
critical, but also by tests' --perl blocks which is impossible to
change. And if Perl detects shell-expansion or uses pipe command it
passess this exe path to /bin/sh which is Cygwin-compiled bash that
cannot work with \-style (or at least in -c processing). Thus we require
\-style on some parts of MTR execution and /-style on another parts.
The examples of tests which cover these different parts are:
main.mysqlbinlog_row_compressed \
main.sp_trans_log
That could be great to force Perl to use something different from
/bin/sh, but unfortunately /bin/sh is compiled-in into binary. So the
only solution left is to overwrite /bin/sh with some wrapper script
which passes the command to cmd.exe instead of bash.
See "Path-style conflict" in "MDEV-30836 MTR Cygwin fix" for explanation.
To install subshell fix use --cygwin-subshell-fix=do
To uninstall use --cygwin-subshell-fix=remove
This works only from Cygwin environment. As long as perl on PATH is
from Cygwin you are on Cygwin environment. Check it with
perl --version
This is perl 5, version 36, subversion 1 (v5.36.1) built for
x86_64-cygwin-threads-multi
Bug in Perl
Scrap attempt to do this smartly on AIX, just drop the test and assume it's OK
This commit undoes the previous push and adds a line to ignore on AIX
- Additional patch with improved protection by putting it all inside an "eval"
- Calling 'hostpath' on a truncated socket may also croak.
- Remove the need to create any directory parts of "path" inside the function.
Don't allow unix socket path to be truncated
mysql-test/lib/My/Platform.pm:
Add check for unix socket path truncation
mysql-test/mysql-test-run.pl:
Don't allow socket path to be truncated. Fail and ask user to correct the problem by
using a shorter path with --tmpdir
Put all path conversions in one file
Convert the --tmpdir passed to "mysqld --verbose --help"
mysql-test/lib/My/Find.pm:
Use My::Platform
mysql-test/lib/My/SafeProcess.pm:
use My::Platform
mysql-test/lib/mtr_cases.pm:
Use My::Platform
mysql-test/lib/mtr_misc.pl:
Move 'mtr_native_path' to My::Platform
mysql-test/lib/My/Platform.pm:
New BitKeeper file ``mysql-test/lib/My/Platform.pm''
mysql-test/lib/t/Platform.t:
New BitKeeper file ``mysql-test/lib/t/Platform.t''
