Provide a script to lint the whole working copy, and update make lint to use it

The script expects a golangci-lint binary in .bin; this makes it possible to
install the exact same version that also runs on CI.

Author: stefanhaller

Makefile

@@ -40,7 +40,7 @@ format:
 
 .PHONY: lint
 lint:
-	golangci-lint run
+	./scripts/lint.sh
 
 # For more details about integration test, see https://github.com/jesseduffield/lazygit/blob/master/pkg/integration/README.md.
 .PHONY: integration-test-tui

scripts/lint.sh

@@ -0,0 +1,12 @@
+#!/bin/sh
+
+set -e
+
+if [ ! -x ./.bin/golangci-lint ]; then
+  echo 'You need to install golangci-lint into .bin'
+  echo 'One way to do this is to run'
+  echo '  GOBIN=$(pwd)/.bin go install github.com/golangci/golangci-lint/v2/cmd/[email protected]'
+  exit 1
+fi
+
+./.bin/golangci-lint run