addressed review comments.

Signed-off-by: Evan <[email protected]>

README.md

@@ -280,10 +280,9 @@ jobs:
 ```
 
 In above classic mode, Concourse will run periodic checks against the `semver` 
-resource `version`. Each check will do a `git clone` as the driver is `git`. On
-a large deployment that hosts thousands of pipelines, when there are a lot of
-`semver` resources, checks on `semver` resources may also bring burden to the
-git system as each check will invoke a `git clone`.
+resource `version`. Each check will do a `git clone` as the driver is `git`. 
+When there are a lot of `semver` resources, checks on `semver` resources may 
+also bring burden to the git system as each check will invoke a `git clone`.
 
 Given each `semver` resource requires a parameter `file` in `source`, `semver`
 resources are hard to enjoy [benefits of global resources](https://concourse-ci.org/global-resources.html#benefits-of-global-resources).
@@ -310,8 +309,8 @@ jobs:
 You may have noticed that, original `get: version` is changed to `put: version`.
 Now resource `version` is put-only, then Concourse will no longer run check on
 it. Param `get_latest: true` tells the `put` step to only fetch the latest version
-without bumping anything. Then the implied `get` will make a bump as the original
-`get: version`.
+without bumping anything. Then the implied `get` will fetch a version as a typical
+`get` step.
 
 If your Concourse or Git (e.g. Gitlab) systems are exhausted by `semver` resources' 
 checks, you may consider reforming pipelines to use this check-less usage.

driver/git.go

@@ -3,7 +3,6 @@ package driver
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/mail"
 	"os"
 	"os/exec"
@@ -225,7 +224,7 @@ func (driver *GitDriver) setUpKey() error {
 	if err != nil {
 		if os.IsNotExist(err) {
 			privateKey := strings.TrimSuffix(driver.PrivateKey, "\n")
-			err := ioutil.WriteFile(privateKeyPath, []byte(privateKey+"\n"), 0600)
+			err := os.WriteFile(privateKeyPath, []byte(privateKey+"\n"), 0600)
 			if err != nil {
 				return err
 			}
@@ -254,7 +253,7 @@ func (driver *GitDriver) setUpUsernamePassword() error {
 	if err != nil {
 		if os.IsNotExist(err) {
 			content := fmt.Sprintf("default login %s password %s", driver.Username, driver.Password)
-			err := ioutil.WriteFile(netRcPath, []byte(content), 0600)
+			err := os.WriteFile(netRcPath, []byte(content), 0600)
 			if err != nil {
 				return err
 			}
@@ -322,8 +321,6 @@ func (driver *GitDriver) readVersion() (semver.Version, bool, error) {
 
 const nothingToCommitString = "nothing to commit"
 const falsePushString = "Everything up-to-date"
-//const pushRejectedString = "[rejected]"
-//const pushRemoteRejectedString = "[remote rejected]"
 
 func (driver *GitDriver) writeVersion(newVersion semver.Version) (bool, error) {
 
@@ -335,7 +332,7 @@ func (driver *GitDriver) writeVersion(newVersion semver.Version) (bool, error) {
 		}
 	}
 
-	err := ioutil.WriteFile(filepath.Join(gitRepoDir, driver.File), []byte(newVersion.String()+"\n"), 0644)
+	err := os.WriteFile(filepath.Join(gitRepoDir, driver.File), []byte(newVersion.String()+"\n"), 0644)
 	if err != nil {
 		return false, err
 	}