chore(scripts): simplify mock.gen.sh to use go generate commands

- Add missing license headers
- Localized mockgen commands in the package where they are needed
- Less shell scripting needed
- Remove unneeded `source` commands for constants.sh and versions.sh

license_header

@@ -0,0 +1,25 @@
+(c) 2024, Ava Labs, Inc.
+
+This file is a derived work, based on the go-ethereum library whose original
+notices appear below.
+
+It is distributed under a license compatible with the licensing terms of the
+original code from which it is derived.
+
+Much love to the original authors for their work.
+**********
+Copyright 2014 The go-ethereum Authors
+This file is part of the go-ethereum library.
+
+The go-ethereum library is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+The go-ethereum library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

plugin/evm/validators/state/interfaces/mocks_generate_test.go

@@ -0,0 +1,3 @@
+package interfaces
+
+//go:generate mockgen -package=$GOPACKAGE -copyright_file=../../../../../license_header -destination=mock_listener.go . StateCallbackListener

precompile/contract/mocks_generate_test.go

@@ -0,0 +1,3 @@
+package contract
+
+//go:generate mockgen -package=$GOPACKAGE -copyright_file=../../license_header -destination=mocks.go . BlockContext,AccessibleState,StateDB

precompile/precompileconfig/mocks_generate_test.go

@@ -0,0 +1,3 @@
+package precompileconfig
+
+//go:generate mockgen -package=$GOPACKAGE -copyright_file=../../license_header -destination=mocks.go . Predicater,Config,ChainConfig,Accepter

scripts/mock.gen.sh

@@ -2,40 +2,7 @@
 
 set -euo pipefail
 
-# Root directory
-SUBNET_EVM_PATH=$(
-  cd "$(dirname "${BASH_SOURCE[0]}")"
-  cd .. && pwd
-)
-
-if ! [[ "$0" =~ scripts/mock.gen.sh ]]; then
-  echo "must be run from repository root"
-  exit 255
-fi
-
 # https://github.com/uber-go/mock
 go install -v go.uber.org/mock/mockgen@v0.4.0
 
-if ! command -v go-license &>/dev/null; then
-  echo "go-license not found, installing..."
-  # https://github.com/palantir/go-license
-  go install -v github.com/palantir/go-license@v1.25.0
-fi
-
-# Load the constants
-source "$SUBNET_EVM_PATH"/scripts/constants.sh
-
-# tuples of (source interface import path, comma-separated interface names, output file path)
-input="scripts/mocks.mockgen.txt"
-while IFS= read -r line; do
-  IFS='=' read -r src_import_path interface_name output_path <<<"${line}"
-  package_name=$(basename "$(dirname "$output_path")")
-  echo "Generating ${output_path}..."
-  mockgen -package="${package_name}" -destination="${output_path}" "${src_import_path}" "${interface_name}"
-
-  go-license \
-    --config=./header.yml \
-    "${output_path}"
-done <"$input"
-
-echo "SUCCESS"
+go generate -run "mockgen.+license_header" ./...