chore: stop using deprecated ioutil package (#467)

This package was deprecated in Go 1.16. This chore breaks compatability
with Go 1.15 which is out of support.

gexec/build.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"go/build"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path"
@@ -222,11 +221,11 @@ func temporaryDirectory() (string, error) {
 	mu.Lock()
 	defer mu.Unlock()
 	if tmpDir == "" {
-		tmpDir, err = ioutil.TempDir("", "gexec_artifacts")
+		tmpDir, err = os.MkdirTemp("", "gexec_artifacts")
 		if err != nil {
 			return "", err
 		}
 	}
 
-	return ioutil.TempDir(tmpDir, "g")
+	return os.MkdirTemp(tmpDir, "g")
 }

gexec/build_test.go

@@ -2,7 +2,6 @@ package gexec_test
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -99,7 +98,7 @@ var _ = Describe(".BuildIn", func() {
 	BeforeEach(func() {
 		var err error
 		original = os.Getenv("GOPATH")
-		gopath, err = ioutil.TempDir("", "")
+		gopath, err = os.MkdirTemp("", "")
 		Expect(err).NotTo(HaveOccurred())
 		copyFile(filepath.Join("_fixture", "firefly", "main.go"), filepath.Join(gopath, "src", target), "main.go")
 		Expect(os.Setenv("GOPATH", filepath.Join(os.TempDir(), "emptyFakeGopath"))).To(Succeed())
@@ -235,7 +234,7 @@ var _ = Describe(".CompiledTestIn", func() {
 	BeforeEach(func() {
 		var err error
 		original = os.Getenv("GOPATH")
-		gopath, err = ioutil.TempDir("", "")
+		gopath, err = os.MkdirTemp("", "")
 		Expect(err).NotTo(HaveOccurred())
 		copyFile(filepath.Join("_fixture", "firefly", "main.go"), filepath.Join(gopath, "src", target), "main.go")
 		Expect(os.Setenv("GOPATH", filepath.Join(os.TempDir(), "emptyFakeGopath"))).To(Succeed())
@@ -278,7 +277,7 @@ var _ = Describe(".CompiledTestIn", func() {
 
 func copyFile(source, directory, basename string) {
 	Expect(os.MkdirAll(directory, 0755)).To(Succeed())
-	content, err := ioutil.ReadFile(source)
+	content, err := os.ReadFile(source)
 	Expect(err).NotTo(HaveOccurred())
-	Expect(ioutil.WriteFile(filepath.Join(directory, basename), content, 0644)).To(Succeed())
+	Expect(os.WriteFile(filepath.Join(directory, basename), content, 0644)).To(Succeed())
 }

gexec/session_test.go

@@ -4,7 +4,6 @@ package gexec_test
 
 import (
 	"io"
-	"io/ioutil"
 	"os/exec"
 	"syscall"
 	"time"
@@ -326,8 +325,8 @@ var _ = Describe("Session", func() {
 
 			When("discarding the output of the command", func() {
 				BeforeEach(func() {
-					outWriter = ioutil.Discard
-					errWriter = ioutil.Discard
+					outWriter = io.Discard
+					errWriter = io.Discard
 				})
 
 				It("executes succesfuly", func() {
@@ -387,8 +386,8 @@ var _ = Describe("Session", func() {
 
 			When("discarding the output of the command", func() {
 				BeforeEach(func() {
-					outWriter = ioutil.Discard
-					errWriter = ioutil.Discard
+					outWriter = io.Discard
+					errWriter = io.Discard
 				})
 
 				It("executes succesfuly", func() {

ghttp/handlers.go

@@ -6,7 +6,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"reflect"
@@ -117,7 +117,7 @@ func (g GHTTPWithGomega) VerifyHeaderKV(key string, values ...string) http.Handl
 func (g GHTTPWithGomega) VerifyBody(expectedBody []byte) http.HandlerFunc {
 	return CombineHandlers(
 		func(w http.ResponseWriter, req *http.Request) {
-			body, err := ioutil.ReadAll(req.Body)
+			body, err := io.ReadAll(req.Body)
 			req.Body.Close()
 			g.gomega.Expect(err).ShouldNot(HaveOccurred())
 			g.gomega.Expect(body).Should(Equal(expectedBody), "Body Mismatch")
@@ -133,7 +133,7 @@ func (g GHTTPWithGomega) VerifyJSON(expectedJSON string) http.HandlerFunc {
 	return CombineHandlers(
 		g.VerifyMimeType("application/json"),
 		func(w http.ResponseWriter, req *http.Request) {
-			body, err := ioutil.ReadAll(req.Body)
+			body, err := io.ReadAll(req.Body)
 			req.Body.Close()
 			g.gomega.Expect(err).ShouldNot(HaveOccurred())
 			g.gomega.Expect(body).Should(MatchJSON(expectedJSON), "JSON Mismatch")
@@ -182,7 +182,7 @@ func (g GHTTPWithGomega) VerifyProtoRepresenting(expected proto.Message) http.Ha
 	return CombineHandlers(
 		g.VerifyContentType("application/x-protobuf"),
 		func(w http.ResponseWriter, req *http.Request) {
-			body, err := ioutil.ReadAll(req.Body)
+			body, err := io.ReadAll(req.Body)
 			g.gomega.Expect(err).ShouldNot(HaveOccurred())
 			req.Body.Close()
 

ghttp/test_server.go

@@ -111,7 +111,6 @@ package ghttp
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	"net/http/httputil"
@@ -269,7 +268,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	} else {
 		s.rwMutex.Unlock()
 		if s.GetAllowUnhandledRequests() {
-			ioutil.ReadAll(req.Body)
+			io.ReadAll(req.Body)
 			req.Body.Close()
 			w.WriteHeader(s.GetUnhandledRequestStatusCode())
 		} else {

ghttp/test_server_test.go

@@ -3,7 +3,6 @@ package ghttp_test
 import (
 	"bytes"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"regexp"
@@ -60,7 +59,7 @@ var _ = Describe("TestServer", func() {
 			Expect(err).ShouldNot(HaveOccurred())
 			Expect(resp.StatusCode).Should(Equal(200))
 
-			body, err := ioutil.ReadAll(resp.Body)
+			body, err := io.ReadAll(resp.Body)
 			resp.Body.Close()
 			Expect(err).ShouldNot(HaveOccurred())
 
@@ -70,7 +69,7 @@ var _ = Describe("TestServer", func() {
 			Expect(err).ShouldNot(HaveOccurred())
 			Expect(resp.StatusCode).Should(Equal(200))
 
-			body2, err := ioutil.ReadAll(resp.Body)
+			body2, err := io.ReadAll(resp.Body)
 			resp.Body.Close()
 			Expect(err).ShouldNot(HaveOccurred())
 
@@ -102,7 +101,7 @@ var _ = Describe("TestServer", func() {
 				Expect(err).ShouldNot(HaveOccurred())
 				Expect(resp.StatusCode).Should(Equal(http.StatusForbidden))
 
-				data, err := ioutil.ReadAll(resp.Body)
+				data, err := io.ReadAll(resp.Body)
 				Expect(err).ShouldNot(HaveOccurred())
 				Expect(data).Should(BeEmpty())
 			})
@@ -792,7 +791,7 @@ var _ = Describe("TestServer", func() {
 
 					Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
-					body, err := ioutil.ReadAll(resp.Body)
+					body, err := io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(body).Should(Equal([]byte("sweet")))
 
@@ -801,7 +800,7 @@ var _ = Describe("TestServer", func() {
 
 					Expect(resp.StatusCode).Should(Equal(http.StatusOK))
 
-					body, err = ioutil.ReadAll(resp.Body)
+					body, err = io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(body).Should(Equal([]byte("sour")))
 				})
@@ -820,7 +819,7 @@ var _ = Describe("TestServer", func() {
 					Expect(err).ShouldNot(HaveOccurred())
 
 					Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
-					Expect(ioutil.ReadAll(resp.Body)).Should(Equal([]byte("sweet")))
+					Expect(io.ReadAll(resp.Body)).Should(Equal([]byte("sweet")))
 					Expect(resp.Header.Get("X-Custom-Header")).Should(Equal("my header"))
 				})
 			})
@@ -854,7 +853,7 @@ var _ = Describe("TestServer", func() {
 
 				Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
-				body, err := ioutil.ReadAll(resp.Body)
+				body, err := io.ReadAll(resp.Body)
 				Expect(err).ShouldNot(HaveOccurred())
 				Expect(body).Should(Equal([]byte("tasty")))
 
@@ -863,7 +862,7 @@ var _ = Describe("TestServer", func() {
 
 				Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
-				body, err = ioutil.ReadAll(resp.Body)
+				body, err = io.ReadAll(resp.Body)
 				Expect(err).ShouldNot(HaveOccurred())
 				Expect(body).Should(Equal([]byte("treat")))
 			})
@@ -881,7 +880,7 @@ var _ = Describe("TestServer", func() {
 
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(resp.StatusCode).Should(Equal(http.StatusOK))
-					body, err := ioutil.ReadAll(resp.Body)
+					body, err := io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(body).Should(BeEmpty())
 
@@ -905,7 +904,7 @@ var _ = Describe("TestServer", func() {
 
 					Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
-					body, err := ioutil.ReadAll(resp.Body)
+					body, err := io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(body).Should(MatchJSON("[1,2,3]"))
 				})
@@ -990,7 +989,7 @@ var _ = Describe("TestServer", func() {
 
 					Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
-					body, err := ioutil.ReadAll(resp.Body)
+					body, err := io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					Expect(body).Should(MatchJSON(`{"Key": "Jim", "Value": "Codes"}`))
 				})
@@ -1071,7 +1070,7 @@ var _ = Describe("TestServer", func() {
 					Expect(resp.StatusCode).Should(Equal(http.StatusCreated))
 
 					var received protobuf.SimpleMessage
-					body, err := ioutil.ReadAll(resp.Body)
+					body, err := io.ReadAll(resp.Body)
 					Expect(err).ShouldNot(HaveOccurred())
 					err = proto.Unmarshal(body, &received)
 					Expect(err).ShouldNot(HaveOccurred())

gmeasure/cache.go

@@ -4,7 +4,6 @@ import (
 	"crypto/md5"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 )
@@ -66,16 +65,16 @@ func (cache ExperimentCache) readHeader(filename string) (CachedExperimentHeader
 List returns a list of all Cached Experiments found in the cache.
 */
 func (cache ExperimentCache) List() ([]CachedExperimentHeader, error) {
-	out := []CachedExperimentHeader{}
-	infos, err := ioutil.ReadDir(cache.Path)
+	var out []CachedExperimentHeader
+	entries, err := os.ReadDir(cache.Path)
 	if err != nil {
 		return out, err
 	}
-	for _, info := range infos {
-		if filepath.Ext(info.Name()) != CACHE_EXT {
+	for _, entry := range entries {
+		if filepath.Ext(entry.Name()) != CACHE_EXT {
 			continue
 		}
-		header, err := cache.readHeader(info.Name())
+		header, err := cache.readHeader(entry.Name())
 		if err != nil {
 			return out, err
 		}
@@ -88,15 +87,15 @@ func (cache ExperimentCache) List() ([]CachedExperimentHeader, error) {
 Clear empties out the cache - this will delete any and all detected cache files in the cache directory.  Use with caution!
 */
 func (cache ExperimentCache) Clear() error {
-	infos, err := ioutil.ReadDir(cache.Path)
+	entries, err := os.ReadDir(cache.Path)
 	if err != nil {
 		return err
 	}
-	for _, info := range infos {
-		if filepath.Ext(info.Name()) != CACHE_EXT {
+	for _, entry := range entries {
+		if filepath.Ext(entry.Name()) != CACHE_EXT {
 			continue
 		}
-		err := os.Remove(filepath.Join(cache.Path, info.Name()))
+		err := os.Remove(filepath.Join(cache.Path, entry.Name()))
 		if err != nil {
 			return err
 		}

matchers/be_a_directory_test.go

@@ -1,7 +1,6 @@
 package matchers_test
 
 import (
-	"io/ioutil"
 	"os"
 
 	. "github.com/onsi/ginkgo"
@@ -14,12 +13,12 @@ var _ = Describe("BeADirectoryMatcher", func() {
 		It("should do the right thing", func() {
 			Expect("/dne/test").ShouldNot(BeADirectory())
 
-			tmpFile, err := ioutil.TempFile("", "gomega-test-tempfile")
+			tmpFile, err := os.CreateTemp("", "gomega-test-tempfile")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpFile.Name())
 			Expect(tmpFile.Name()).ShouldNot(BeADirectory())
 
-			tmpDir, err := ioutil.TempDir("", "gomega-test-tempdir")
+			tmpDir, err := os.MkdirTemp("", "gomega-test-tempdir")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpDir)
 			Expect(tmpDir).Should(BeADirectory())

matchers/be_a_regular_file_test.go

@@ -1,7 +1,6 @@
 package matchers_test
 
 import (
-	"io/ioutil"
 	"os"
 
 	. "github.com/onsi/ginkgo"
@@ -14,12 +13,12 @@ var _ = Describe("BeARegularFileMatcher", func() {
 		It("should do the right thing", func() {
 			Expect("/dne/test").ShouldNot(BeARegularFile())
 
-			tmpFile, err := ioutil.TempFile("", "gomega-test-tempfile")
+			tmpFile, err := os.CreateTemp("", "gomega-test-tempfile")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpFile.Name())
 			Expect(tmpFile.Name()).Should(BeARegularFile())
 
-			tmpDir, err := ioutil.TempDir("", "gomega-test-tempdir")
+			tmpDir, err := os.MkdirTemp("", "gomega-test-tempdir")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpDir)
 			Expect(tmpDir).ShouldNot(BeARegularFile())

matchers/be_an_existing_file_test.go

@@ -1,7 +1,6 @@
 package matchers_test
 
 import (
-	"io/ioutil"
 	"os"
 
 	. "github.com/onsi/ginkgo"
@@ -14,12 +13,12 @@ var _ = Describe("BeAnExistingFileMatcher", func() {
 		It("should do the right thing", func() {
 			Expect("/dne/test").ShouldNot(BeAnExistingFile())
 
-			tmpFile, err := ioutil.TempFile("", "gomega-test-tempfile")
+			tmpFile, err := os.CreateTemp("", "gomega-test-tempfile")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpFile.Name())
 			Expect(tmpFile.Name()).Should(BeAnExistingFile())
 
-			tmpDir, err := ioutil.TempDir("", "gomega-test-tempdir")
+			tmpDir, err := os.MkdirTemp("", "gomega-test-tempdir")
 			Expect(err).ShouldNot(HaveOccurred())
 			defer os.Remove(tmpDir)
 			Expect(tmpDir).Should(BeAnExistingFile())

matchers/have_http_body_matcher.go

@@ -2,7 +2,7 @@ package matchers
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/http/httptest"
 
@@ -81,7 +81,7 @@ func (matcher *HaveHTTPBodyMatcher) body(actual interface{}) ([]byte, error) {
 		if a.Body != nil {
 			defer a.Body.Close()
 			var err error
-			matcher.cachedBody, err = ioutil.ReadAll(a.Body)
+			matcher.cachedBody, err = io.ReadAll(a.Body)
 			if err != nil {
 				return nil, fmt.Errorf("error reading response body: %w", err)
 			}