Use Go 1.20; set golangci-lint from GitHub env

Author: alexandear

.github/workflows/lint.yml

@@ -4,18 +4,20 @@ on:
     branches:
       - main
   pull_request:
+env:
+  GOLANGCI_LINT_VERSION: v1.51.2
 jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
     - uses: actions/setup-go@v3
       with:
-        go-version: 1.19.x
+        go-version: 1.20.x
     - run: go version
     - run: diff -u <(echo -n) <(gofmt -d .)
     - name: Run golangci-lint
       uses: golangci/golangci-lint-action@v3
       with:
-        version: v1.51.2
+        version: ${{ env.GOLANGCI_LINT_VERSION }}
         args: --verbose

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.20.x]
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:

Makefile

@@ -5,6 +5,8 @@ export GOBIN := $(MAKEFILE_PATH)/bin
 
 PATH := $(GOBIN):$(PATH)
 
+GOLANGCI_LINT_VERSION=$(shell awk '/GOLANGCI_LINT_VERSION:/ { print $$2 }' .github/workflows/lint.yml)
+
 .PHONY: all
 all: clean format build lint test
 
@@ -26,7 +28,7 @@ test:
 .PHONY: lint
 lint:
 	@echo lint
-	@go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.51.2
+	@go install github.com/golangci/golangci-lint/cmd/golangci-lint@$(GOLANGCI_LINT_VERSION)
 	@$(GOBIN)/golangci-lint run
 
 .PHONY: format

README.md

@@ -4,7 +4,7 @@ The tool to import commits from private GitLab to separate repo. Can be used to
 
 # Getting Started
 
-1. Download and install [Go 1.19](https://go.dev/dl/).
+1. Download and install [Go 1.20](https://go.dev/dl/).
 2. Install the program by running the command in a shell:
 ```shell
 go install github.com/alexandear/import-gitlab-commits@latest

go.mod

@@ -1,6 +1,6 @@
 module github.com/alexandear/import-gitlab-commits
 
-go 1.19
+go 1.20
 
 require (
 	github.com/go-git/go-git/v5 v5.2.0