msys / mingw command line requires or rejects exe extension based on whether stdout is redirected with ConEmu console - console

Question

The underlying cause of this problem is described elsewhere, with partial workarounds provided.
For example: stdout is not a tty and stdin is not a tty
An example of a command line I'm having problems with in MSYS2 or MINGW64 environments is this:
# psql -c '\d' | grep public
stdout is not a tty
Here's the output, if issued without piping to grep:
# psql -c '\d'
List of relations
Schema | Name | Type | Owner
--------+----------------+----------+----------
public | tagname | table | postgres
public | tagname_id_seq | sequence | postgres
(2 rows)
In order to redirect stdout, it's apparently necessary to edit the command line, changing psql to psql.exe. This modification does the trick:
# psql.exe -c '\d' | grep public
public | tagname | table | postgres
public | tagname_id_seq | sequence | postgres
This version works, whether or not stdout is redirected:
# psql.exe -c '\d'
List of relations
Schema | Name | Type | Owner
--------+----------------+----------+----------
public | tagname | table | postgres
public | tagname_id_seq | sequence | postgres
(2 rows)
Note that the problem only exists for some programs. For example, /usr/bin/find is indifferent to whether the .exe extension is specified. Also, the cygwin version of psql.exe does not suffer from this limitation.
The workaround of appending .exe could be hidden with an alias if you could always call psql as psql.exe, but there are problems with interactive sessions when called with the extension. (in ConEmu terminal under MSYS_NT-10.0-19042, for example)
So my question is this: is it possible to create a wrapper program (for example, in golang or C, or a shell script) to hide this problem? The goal would be to support optionally redirectable command lines without requiring the .exe extension.
Assuming the wrapper is named "fixtty", it would spawn a command line that could be redirected or not. In other words, neither of these command lines would fail with an error message:
# fixtty psql -c '\d'
# fixtty psql -c '\d' | grep public

Answer 1

A wrapper script (call it fixtty) that hides the problem:
#!/bin/bash
if [ -t 1 ]; then
# stdout is a terminal
"$#"
else
# stdout is a file or pipe
PROG=$1 ; shift
set -- "$PROG.exe" "$#" # append .exe suffix
"$#"
fi
Usage:
$ fixtty psql -c '\d' # unfiltered `stdout`
$ fixtty psql -c '\d' | grep public # filtered
$ fixtty psql # launch interactive session