Add mockgen installation to the script (#6604)

* Add mockgen installation to the script

Signed-off-by: Parthvi Vala <pvala@redhat.com>

* Use go install -mod=readonly instead of installing the binary

Signed-off-by: Parthvi Vala <pvala@redhat.com>

* Add mockgen installation to goget-tools target incase the user wants to run the script individually

Signed-off-by: Parthvi Vala <pvala@redhat.com>

* Update Makefile

Co-authored-by: Armel Soro <armel@rm3l.org>

---------

Signed-off-by: Parthvi Vala <pvala@redhat.com>
Co-authored-by: Armel Soro <asoro@redhat.com>
Co-authored-by: Armel Soro <armel@rm3l.org>

scripts/mockgen.sh

@@ -1,92 +1,97 @@
 #!/usr/bin/env bash
 
-# Use this script to regererate generated mock files
+# Use this script to regenerate generated mock files
 # after changing signatures of interfaces in these packages
 
-mockgen -source=pkg/kclient/interface.go \
+gomockVersion=$(go list -mod=readonly -m -f '{{.Version}}' github.com/golang/mock)
+mockgen="go run -mod=readonly github.com/golang/mock/mockgen@$gomockVersion"
+
+echo Using mockgen "$($mockgen --version)"
+
+$mockgen -source=pkg/kclient/interface.go \
     -package kclient \
     -destination pkg/kclient/mock_Client.go
 
-mockgen -source=pkg/storage/storage.go \
+$mockgen -source=pkg/storage/storage.go \
     -package storage \
     -destination pkg/storage/mock_Client.go 
 
-mockgen -source=pkg/devfile/image/image.go \
+$mockgen -source=pkg/devfile/image/image.go \
     -package image \
     -destination pkg/devfile/image/mock_Backend.go
 
-mockgen -source=pkg/odo/cmdline/cmdline.go \
+$mockgen -source=pkg/odo/cmdline/cmdline.go \
     -package cmdline \
     -destination pkg/odo/cmdline/mock.go
 
-mockgen -source=pkg/project/project.go \
+$mockgen -source=pkg/project/project.go \
     -package project \
     -destination pkg/project/mock.go
 
-mockgen -source=pkg/preference/preference.go \
+$mockgen -source=pkg/preference/preference.go \
     -package preference \
     -destination pkg/preference/mock.go
 
-mockgen -source=pkg/auth/interface.go \
+$mockgen -source=pkg/auth/interface.go \
     -package auth \
     -destination pkg/auth/mock.go
 
-mockgen -source=pkg/init/backend/interface.go \
+$mockgen -source=pkg/init/backend/interface.go \
     -package backend \
     -destination pkg/init/backend/mock.go
 
-mockgen -source=pkg/init/asker/interface.go \
+$mockgen -source=pkg/init/asker/interface.go \
     -package asker \
     -destination pkg/init/asker/mock.go
 
-mockgen -source=pkg/init/interface.go \
+$mockgen -source=pkg/init/interface.go \
     -package init \
     -destination pkg/init/mock.go
 
-mockgen -source=pkg/registry/interface.go \
+$mockgen -source=pkg/registry/interface.go \
     -package registry \
     -destination pkg/registry/mock.go
 
-mockgen -source=pkg/deploy/interface.go \
+$mockgen -source=pkg/deploy/interface.go \
     -package deploy \
     -destination pkg/deploy/mock.go
 
-mockgen -source=pkg/libdevfile/libdevfile.go \
+$mockgen -source=pkg/libdevfile/libdevfile.go \
     -package libdevfile \
     -destination pkg/libdevfile/handler_mock.go
 
-mockgen -source=pkg/watch/interface.go \
+$mockgen -source=pkg/watch/interface.go \
     -package watch \
     -destination pkg/watch/mock.go
 
-mockgen -source=pkg/component/delete/interface.go \
+$mockgen -source=pkg/component/delete/interface.go \
     -package delete \
     -destination pkg/component/delete/mock.go
 
-mockgen -source=pkg/dev/interface.go \
+$mockgen -source=pkg/dev/interface.go \
     -package dev \
     -destination pkg/dev/mock.go
 
-mockgen -source=pkg/alizer/interface.go \
+$mockgen -source=pkg/alizer/interface.go \
     -package alizer \
     -destination pkg/alizer/mock.go
 
-mockgen -source=pkg/binding/interface.go \
+$mockgen -source=pkg/binding/interface.go \
     -package binding \
     -destination pkg/binding/mock.go
 
-mockgen -source=pkg/binding/backend/interface.go \
+$mockgen -source=pkg/binding/backend/interface.go \
     -package backend \
     -destination pkg/binding/backend/mock.go
 
-mockgen -source=pkg/sync/interface.go \
+$mockgen -source=pkg/sync/interface.go \
     -package sync \
     -destination pkg/sync/mock.go
 
-mockgen -source=pkg/exec/interface.go \
+$mockgen -source=pkg/exec/interface.go \
     -package exec \
     -destination pkg/exec/mock.go
 
-mockgen -source=pkg/podman/interface.go \
+$mockgen -source=pkg/podman/interface.go \
     -package podman \
     -destination pkg/podman/mock.go