I am trying to achieve a specific logic in PowerShell 1-liner that is similar to the following bash command:

{ $another_command_group ;} && { A ; { B && C ;} ;} && { $another_command_group ;}

{ A ; { B && C ;} ;}

The logic of this command is as follows:

1. A=False, B=False, C=False, then it will execute nothing.
2. A=False, B=False, C=True, then it will execute nothing.
3. A=False, B=True, C=False, then it will execute Command B only.
4. A=False, B=True, C=True, then it will execute Command B and Command C.
5. A=True, B=False, C=False, then it will execute Command A only.
6. A=True, B=False, C=True, then it will execute Command A only.
7. A=True, B=True, C=False, then it will execute Command A and Command B.
8. A=True, B=True, C=True, then it will execute All command A, B, C.

PowerShell version: 7.26

OS: Windows

What I already tried:

• ( A ; ( B && C ) )

  Not Working.

| Missing closing ')' in expression.

• A ; ( B && C )

  Worked though, but apparently this is not good enough, because I need the Parentheses () to make them a (group) to stick with other (group)s with and &&

I am having trouble finding a one-liner Command to replicate this logic in PowerShell. I would greatly appreciate any suggestions or solutions.

CodePudding user response：

• It is sufficient to use (...), the grouping operator, to enclose a single pipeline chain, i.e. two or more possibly pipeline-connected commands connected via && or ||, the pipeline-chain operators.

• To execute multiple statements (a pipeline chain being one example of a statement) as a group, enclose them in a script block, { ... } and also call that block with &, the call operator or, if needed, for PowerShell code, with ., the dot-sourcing operator.

  • That is, { ... } alone does not result in execution - it just defines a reusable piece of PowerShell code that must be called on demand.

  • Also, unlike in Bash, the last statement inside { ... } need not be ;-terminated; ; need only be placed between statements.

Therefore:

& { $another_command_group } && & { A ; (B && C) } && & { $another_command_group }