Add a "Prepend" extension for the ProcessArgumentBuilder

[antwilliams]

It would be useful to add an Insert method for the ProcessArgumentBuilder to complement the Append method.

This would allow additional arguments to be specified for tools that use the final argument as the target.

An example (and my motivation) of this is the SignTool command, I need to add an additional flag that isn't supported by the current tool implementation. If I use the ArgumentCustomization property the new flag is added to the end of the arguments and then SignTool interprets this as a filename to try and sign.

The flag I require could be added to the SignTool implementation but that would only resolve this specific use case, I would imagine that there are many tools that use the final argument as the input filename and this modification would enable those scenarios as well.

I am willing to submit a PR for this if there is interest in the improvement.

[gep13]

In principal, I don't have a problem with this. The only suggestion would be the rather Insert which would suggest inserting at a particular location, the method might be called Prepend instead?

[gep13]

And yes, perhaps raise another issue for adding the Target property to the SignTool implementation.

[agc93]

As @gep13 mentioned, Prepend seems more appropriate since most Insert methods (even including StringBuilder for example) seem to be for inserting into a specified location.

[antwilliams]

Makes sense to me, I had been thinking about an Insert method that would allow a position to be specified but on further consideration this wouldn't make much sense.
The user couldn't guarantee what other arguments were being added by the tool implementation and wouldn't be able to guarantee the final position.

I'll start on a PR!

[gep13]

@antwilliams thanks again for your contribution!