support 'legacy' buildscripts (job -safe)

[mwallner]

We've got a bunch of pretty legacy scripts what utilize the (job Something -safe) syntax for task dependencies.
Those scripts can only be run with IB <= 4.2.
It would be great to have some way of "re-enabling" the old syntax, but I'm currently struggling to come up with a piece of code that could be used to achieve this without having to change IB source directly.

Thinking of something like this:

ib-legacy-hack.psm1

function job {
  param(
    [string]$name,
    [switch]$safe
  )
  ?$name
}

And then use it like this:

Import-Module ib-legacy-hack.psm1
Invoke-Build -File legacy.build.ps1 -Task Something

[nightroman]

I am glad to know that safe jobs/tasks are used not just by me.
I think you are thinking correctly. Your idea with a few tweaks:

legacy.build.ps1

task IWork {
    'I am working.'
}

task IFail {
    throw 'I failed.'
}

task Something (job IWork), (job IFail -Safe), {
    'Something is working.'
}

ib-legacy-hack.psm1

function job {
    param(
        [string]$name,
        [switch]$safe
    )
    if ($safe) {
        "?$name"
    }
    else {
        $name
    }
}

Test-1.ps1

Import-Module $PSScriptRoot\ib-legacy-hack.psm1
Invoke-Build -File $PSScriptRoot\legacy.build.ps1 -Task Something

Output:

Build Something C:\tmp\_220629_qs-ib-203\legacy.build.ps1
Task /Something/IWork
I am working.
Done /Something/IWork 00:00:00.0156228
Task /Something/?IFail
ERROR: I failed.
At C:\tmp\_220629_qs-ib-203\legacy.build.ps1:7 char:2
+     throw 'I failed.'
+     ~~~~~~~~~~~~~~~~~
At C:\tmp\_220629_qs-ib-203\legacy.build.ps1:6 char:1
+ task IFail {
+ ~~~~~~~~~~~~
Task /Something
Something is working.
Done /Something 00:00:00.0624976
Build completed with errors. 3 tasks, 1 errors, 0 warnings 00:00:00.2812490