Use Go version in go.mod (#396)

* Use Go version in go.mod

* Update int128/go-workflows

* Fix deprecated ioutil

---------

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/e2e-test.yaml

@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.21.6
+          go-version-file: go.mod
       - run: make -C e2e_test -j3
       - run: git config --global user.email ci@example.com
       - run: git config --global user.name ci

.github/workflows/go.yaml

@@ -18,9 +18,9 @@ on:
 
 jobs:
   check:
-    uses: int128/go-workflows/.github/workflows/check.yaml@v0.2.1
+    uses: int128/go-workflows/.github/workflows/check.yaml@v0.3.0
     with:
-      go-version: 1.21.6
+      go-version-file: go.mod
       golangci-lint-version: v1.55.2
 
   test:
@@ -30,5 +30,5 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.21.6
+          go-version-file: go.mod
       - run: go test -v -race ./...

.github/workflows/release.yaml

@@ -51,7 +51,7 @@ jobs:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4
       - uses: actions/setup-go@v5
         with:
-          go-version: 1.21.6
+          go-version-file: go.mod
       - run: go build -ldflags '-X main.version=${{ github.ref_name }}'
       - uses: int128/go-actions/release@v1
         with:

e2e_test/main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -109,7 +108,7 @@ func takeScreenshot(name string) chromedp.Action {
 		if err := chromedp.FullScreenshot(&b, 90).Do(ctx); err != nil {
 			return fmt.Errorf("could not capture a screenshot: %w", err)
 		}
-		if err := ioutil.WriteFile(name, b, 0644); err != nil {
+		if err := os.WriteFile(name, b, 0644); err != nil {
 			return fmt.Errorf("could not write: %w", err)
 		}
 		log.Printf("saved screenshot to %s", name)

go.mod

@@ -1,6 +1,6 @@
 module github.com/int128/kauthproxy
 
-go 1.12
+go 1.21.6
 
 require (
 	github.com/cenkalti/backoff/v4 v4.2.1
@@ -18,3 +18,61 @@ require (
 	k8s.io/client-go v0.28.4
 	k8s.io/klog/v2 v2.120.0
 )
+
+require (
+	github.com/chromedp/cdproto v0.0.0-20231011050154-1d073bb38998 // indirect
+	github.com/chromedp/sysutil v1.0.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful/v3 v3.9.0 // indirect
+	github.com/evanphx/json-patch v4.12.0+incompatible // indirect
+	github.com/go-errors/errors v1.4.2 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
+	github.com/go-openapi/jsonpointer v0.19.6 // indirect
+	github.com/go-openapi/jsonreference v0.20.2 // indirect
+	github.com/go-openapi/swag v0.22.3 // indirect
+	github.com/gobwas/httphead v0.1.0 // indirect
+	github.com/gobwas/pool v0.2.1 // indirect
+	github.com/gobwas/ws v1.3.0 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/btree v1.0.1 // indirect
+	github.com/google/gnostic-models v0.6.8 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/gregjones/httpcache v0.0.0-20180305231024-9cad4c3443a7 // indirect
+	github.com/imdario/mergo v0.3.6 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/moby/spdystream v0.2.0 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/monochromegane/go-gitignore v0.0.0-20200626010858-205db1a8cc00 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/xlab/treeprint v1.2.0 // indirect
+	go.starlark.net v0.0.0-20230525235612-a134d8f9ddca // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/oauth2 v0.8.0 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+	golang.org/x/term v0.13.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20230717233707-2695361300d9 // indirect
+	k8s.io/utils v0.0.0-20230406110748-d93618cff8a2 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/kustomize/api v0.13.5-0.20230601165947-6ce0bf390ce3 // indirect
+	sigs.k8s.io/kustomize/kyaml v0.14.3-0.20230601165947-6ce0bf390ce3 // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
+)