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/
upgrade.go
127 lines (101 loc) · 2 KB
/
upgrade.go
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package checker
import (
"encoding/json"
"os/exec"
"sync"
"time"
. "github.com/onsi/ginkgo"
)
type Upgrade struct {
PollInterval time.Duration
upgradeName string
stopChan chan bool
upgradeDone bool
waitGroup sync.WaitGroup
mutex sync.Mutex
}
type kappResponse struct {
Tables []struct {
Rows []struct {
Name string `json:"name"`
FinishedAt string `json:"finished_at"`
}
}
}
func (u *Upgrade) Start() {
u.stopChan = make(chan bool)
u.waitGroup.Add(1)
go func() {
for {
select {
case <-u.stopChan:
u.waitGroup.Done()
return
case <-time.After(u.PollInterval):
u.checkUpgrade()
}
}
}()
}
func (u *Upgrade) Stop() {
close(u.stopChan)
u.waitGroup.Wait()
}
func (u *Upgrade) HasFoundUpgrade() bool {
u.mutex.Lock()
defer u.mutex.Unlock()
return u.upgradeName != ""
}
func (u *Upgrade) IsUpgradeFinished() bool {
u.mutex.Lock()
defer u.mutex.Unlock()
return u.upgradeDone
}
func (u *Upgrade) checkUpgrade() {
u.mutex.Lock()
defer u.mutex.Unlock()
if u.upgradeName == "" {
u.upgradeName = u.discoverUpgradeName()
} else {
if u.checkIfUpgradeHasFinished(u.upgradeName) {
u.upgradeDone = true
}
}
}
func (u *Upgrade) checkIfUpgradeHasFinished(upgradeName string) bool {
resp := u.kappAppChangeLS()
for _, table := range resp.Tables {
for _, row := range table.Rows {
if row.Name == upgradeName {
return row.FinishedAt != ""
}
}
}
return false
}
func (u *Upgrade) discoverUpgradeName() string {
resp := u.kappAppChangeLS()
for _, table := range resp.Tables {
for _, row := range table.Rows {
if row.FinishedAt == "" {
return row.Name
}
}
}
return ""
}
func (u *Upgrade) kappAppChangeLS() kappResponse {
args := []string{"app-change", "ls", "-a", "cf", "--json"}
cmd := exec.Command("kapp", args...)
cmd.Stderr = GinkgoWriter
output, err := cmd.Output()
if err != nil {
panic(err)
}
resp := &kappResponse{}
err = json.Unmarshal(output, resp)
if err != nil {
panic(err)
}
return *resp
}