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cli.go
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cli.go
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package ksync
import (
"fmt"
"os"
"path/filepath"
"runtime"
"strings"
"github.com/jenkins-x/jx/v2/pkg/packages"
"github.com/jenkins-x/jx/v2/pkg/util"
)
var commit string
var binary = "ksync"
// CLI implements the command ksync commands contained in KSyncer.
type CLI struct {
Runner util.Commander
}
// NewCLI creates a new KsyncCLI instance configured to use the provided ksync CLI in the given current working directory
func NewCLI() (*CLI, error) {
path, err := util.JXBinLocation()
if err != nil {
return nil, err
}
runner := &util.Command{
Name: fmt.Sprintf("%s/ksync", path),
}
cli := &CLI{
Runner: runner,
}
return cli, nil
}
// isInstalled checks if the binary is installed
func isInstalled(binary string) (bool, error) {
flag, err := packages.ShouldInstallBinary(binary)
return flag, err
}
// getTag returns the latest full tag from github given the owner and repo, and installs
func getTag(owner, repo string) (string, string, error) {
latestTag, err := util.GetLatestFullTagFromGithub(owner, repo)
if err != nil {
return "", "", err
}
latestVersion := *latestTag.Name
// This will return the shortsha, the first 7 characters associated with the git commit
latestSha := (*latestTag.Commit.SHA)[:7]
return latestSha, latestVersion, nil
}
// install downloads and installs the ksync package
func install(latestVersion, binDir, fileName string) error {
clientURL := fmt.Sprintf("https://github.com/ksync/ksync/releases/download/%s/ksync_%s_%s", latestVersion, runtime.GOOS, runtime.GOARCH)
if runtime.GOOS == "windows" {
clientURL += ".exe"
}
fullPath := filepath.Join(binDir, fileName)
tmpFile := fullPath + ".tmp"
err := packages.DownloadFile(clientURL, tmpFile)
if err != nil {
return err
}
err = util.RenameFile(tmpFile, fullPath)
if err != nil {
return err
}
err = os.Chmod(fullPath, 0755)
if err != nil {
return err
}
return nil
}
// Version prints out the version of the local component of ksync
func (kcli *CLI) Version() (string, error) {
args := []string{"version"}
kcli.Runner.SetArgs(args)
out, _ := kcli.Runner.RunWithoutRetry()
return out, nil
}
// Init installs the server side component of ksync - the daemonsets
func (kcli *CLI) Init(flags ...string) (string, error) {
args := []string{"init"}
args = append(args, flags...)
kcli.Runner.SetArgs(args)
out, err := kcli.Runner.RunWithoutRetry()
if err != nil {
return "", err
}
return out, nil
}
// Clean removes the ksync pods
func (kcli *CLI) Clean() (string, error) {
args := []string{"clean"}
kcli.Runner.SetArgs(args)
out, err := kcli.Runner.RunWithoutRetry()
if err != nil {
return "", err
}
return out, nil
}
// InstallKSync installs ksync, it returns the sha of the latest commit
func InstallKSync() (string, error) {
binDir, err := util.JXBinLocation()
if err != nil {
return "", err
}
download, err := isInstalled(binary)
if err != nil || !download {
// Exec `ksync` to find the version
kcli, err := NewCLI()
if err != nil {
return "", err
}
res, err := kcli.Version()
if err != nil {
return "", err
}
commit = getCommitShaFromVersion(res)
if commit != "" {
return commit, nil
}
return "", fmt.Errorf("unable to find version of ksync")
}
latestSha, latestVersion, err := getTag("ksync", "ksync")
if err != nil {
return "", err
}
err = install(latestVersion, binDir, packages.BinaryWithExtension(binary))
if err != nil {
return "", err
}
return latestSha, nil
}
func getCommitShaFromVersion(result string) string {
lines := strings.Split(result, "\n")
for _, line := range lines {
line = strings.TrimSpace(line)
if strings.HasPrefix(line, "Git Commit:") {
commit = strings.TrimSpace(strings.TrimPrefix(line, "Git Commit:"))
}
}
return commit
}