cmd to bash???

build.cmd

@echo Off

PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '.\build.ps1'"

if not "%errorlevel%"=="0" goto failure

:success
ECHO successfully built project
REM exit 0
goto end

:failure
ECHO failed to build.
REM exit -1
goto end

:end

build.sh

#!/bin/sh
PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '.\build.ps1'"

if $errorlevel != "0" ; 
 then goto failure
fi

:success
echo successfully built project
# exit 0
goto end

:failure
echo failed to build.
# exit -1
goto end

:end

A good place to start with checking shell scripts is Shell check. They help you catch all sorts of nasty possibilities before hand.

Its also worthwhile giving this a read. Talks about how to setup "strict mode" when writing shell scripts.

Also this looks more like a "transliteration" than a "translation" from the PS script. Which is a great place to start but not really idiomatic. Here's how I'd approach writing this (might also not be the best way)

#!/bin/bash

set -eu

PowerShell -NoProfile -ExecutionPolicy Bypass -Command "& '.\build.ps1'"

if [ $# -ne 0 ]; then
  echo "Failed to build"
  exit 1
fi

echo "Successfully built project"
exit 0

Would be more than happy to help out more :)

Welcome to the beautiful (yet sometimes painful) world of shells scripts!

• http://redsymbol.net/articles/unofficial-bash-strict-mode/
• https://github.com/coryb/osht/blob/master/README.md