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I want my PowerShell script to stop when any of the commands I run fail (like set -e in bash). I'm using both Powershell commands (New-Object System.Net.WebClient) and programs (.\setup.exe).
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If you use the break keyword with a label, PowerShell exits the labeled loop instead of exiting the current loop. The label is a colon followed by a name that you assign. The label must be the first token in a statement, and it must be followed by the looping keyword, such as while .
You can use Stop-Job to stop background jobs, such as those that were started by using the Start-Job cmdlet or the AsJob parameter of any cmdlet. When you stop a background job, PowerShell completes all tasks that are pending in that job queue and then ends the job.
$ErrorActionPreference = "Stop" will get you part of the way there (i.e. this works great for cmdlets).
However for EXEs you're going to need to check $LastExitCode yourself after every exe invocation and determine whether that failed or not. Unfortunately I don't think PowerShell can help here because on Windows, EXEs aren't terribly consistent on what constitutes a "success" or "failure" exit code. Most follow the UNIX standard of 0 indicating success but not all do. Check out the CheckLastExitCode function in this blog post. You might find it useful.
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You should be able to accomplish this by using the statement $ErrorActionPreference = "Stop" at the beginning of your scripts.
The default setting of $ErrorActionPreference is Continue, which is why you are seeing your scripts keep going after errors occur.
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