Add exclude-regex or similar mechanism to ignore certain types

[kbolino]

Description

Currently, to define which types (not packages) to generate mocks for using the new configuration syntax, there seem to be three options: specify each type, set all: true, or set include-regex to a regular expression. However, negating a regular expression is not possible in general, and so there is no way to configure mockery to generate mocks for all types except certain ones.

In my particular case, I have a type like the following:

type Option func(*privateStructType)

I configure mockery to generate mocks in another package, and so it is impossible to have a mock for this type. However, without enumerating all of the other interface types instead, I see no way to disable mock generation for this type. What I'd like to see is something like an exclude-regex option (the inverse of include-regex), an ignore type-specific option, or some similar mechanism to prevent this type from being mocked.

A temporary solution might have been to specify a never-used build tag on that type only, but when trying that, I ran into #691 instead.

Mockery Version

% mockery --version
08 Oct 23 17:06 EDT INF couldn't read any config file version=v2.34.2
08 Oct 23 17:06 EDT INF Starting mockery dry-run=false version=v2.34.2
08 Oct 23 17:06 EDT INF Using config:  dry-run=false version=v2.34.2
v2.34.2

Golang Version

% go version
go version go1.21.2 darwin/arm64

Installation Method

• Binary Distribution
• Docker
• brew
• go install
• Other: [specify]

Steps to Reproduce

Not a bug, but here's my mockery config for illustration (exact package name is redacted):

all: true
dir: "{{ .InterfaceDir }}/mocks"
filename: "{{ .InterfaceName }}.go"
mockname: "{{ .InterfaceName }}"
outpkg: mocks
with-expecter: true
packages:
  example.com/package:
    config:
      exclude: [mocks]
      recursive: true

[LandonTClipp]

I was waiting for someone to send in a request for this :D I have no concerns with it. When an interface matches both the include and exclude regex, we should exclude the interface. I think this will be very easy to do, PRs are welcome!