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main.go
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main.go
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package main
import (
"context"
"fmt"
"os"
"os/signal"
"strconv"
"strings"
"time"
"github.com/google/go-github/v43/github"
"golang.org/x/oauth2"
)
func handleInterrupt(ctx context.Context, client *github.Client, apprv *approvalEnvironment) {
newState := "closed"
closeComment := "Workflow cancelled, closing issue."
fmt.Println(closeComment)
_, _, err := client.Issues.CreateComment(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueComment{
Body: &closeComment,
})
if err != nil {
fmt.Printf("error commenting on issue: %v\n", err)
return
}
_, _, err = client.Issues.Edit(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueRequest{State: &newState})
if err != nil {
fmt.Printf("error closing issue: %v\n", err)
return
}
}
func newCommentLoopChannel(ctx context.Context, apprv *approvalEnvironment, client *github.Client) chan int {
channel := make(chan int)
go func() {
for {
comments, _, err := client.Issues.ListComments(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueListCommentsOptions{})
if err != nil {
fmt.Printf("error getting comments: %v\n", err)
channel <- 1
close(channel)
}
approved, err := approvalFromComments(comments, apprv.issueApprovers, apprv.minimumApprovals)
if err != nil {
fmt.Printf("error getting approval from comments: %v\n", err)
channel <- 1
close(channel)
}
fmt.Printf("Workflow status: %s\n", approved)
switch approved {
case approvalStatusApproved:
newState := "closed"
closeComment := "All approvers have approved, continuing workflow and closing this issue."
_, _, err := client.Issues.CreateComment(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueComment{
Body: &closeComment,
})
if err != nil {
fmt.Printf("error commenting on issue: %v\n", err)
channel <- 1
close(channel)
}
_, _, err = client.Issues.Edit(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueRequest{State: &newState})
if err != nil {
fmt.Printf("error closing issue: %v\n", err)
channel <- 1
close(channel)
}
channel <- 0
fmt.Println("Workflow manual approval completed")
close(channel)
case approvalStatusDenied:
newState := "closed"
closeComment := "Request denied. Closing issue and failing workflow."
_, _, err := client.Issues.CreateComment(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueComment{
Body: &closeComment,
})
if err != nil {
fmt.Printf("error commenting on issue: %v\n", err)
channel <- 1
close(channel)
}
_, _, err = client.Issues.Edit(ctx, apprv.targetRepoOwner, apprv.targetRepoName, apprv.approvalIssueNumber, &github.IssueRequest{State: &newState})
if err != nil {
fmt.Printf("error closing issue: %v\n", err)
channel <- 1
close(channel)
}
channel <- 1
close(channel)
}
time.Sleep(pollingInterval)
}
}()
return channel
}
func newGithubClient(ctx context.Context) (*github.Client, error) {
token := os.Getenv(envVarToken)
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
)
tc := oauth2.NewClient(ctx, ts)
serverUrl, serverUrlPresent := os.LookupEnv("GITHUB_SERVER_URL")
apiUrl, apiUrlPresent := os.LookupEnv("GITHUB_API_URL")
if serverUrlPresent {
if !apiUrlPresent {
apiUrl = serverUrl
}
return github.NewEnterpriseClient(apiUrl, serverUrl, tc)
}
return github.NewClient(tc), nil
}
func validateInput() error {
missingEnvVars := []string{}
if os.Getenv(envVarRepoFullName) == "" {
missingEnvVars = append(missingEnvVars, envVarRepoFullName)
}
if os.Getenv(envVarRunID) == "" {
missingEnvVars = append(missingEnvVars, envVarRunID)
}
if os.Getenv(envVarRepoOwner) == "" {
missingEnvVars = append(missingEnvVars, envVarRepoOwner)
}
if os.Getenv(envVarToken) == "" {
missingEnvVars = append(missingEnvVars, envVarToken)
}
if os.Getenv(envVarApprovers) == "" {
missingEnvVars = append(missingEnvVars, envVarApprovers)
}
if len(missingEnvVars) > 0 {
return fmt.Errorf("missing env vars: %v", missingEnvVars)
}
return nil
}
func main() {
if err := validateInput(); err != nil {
fmt.Printf("%v\n", err)
os.Exit(1)
}
targetRepoOwner := os.Getenv("target-repository-owner")
targetRepoName := os.Getenv("target-repository")
repoFullName := os.Getenv(envVarRepoFullName)
runID, err := strconv.Atoi(os.Getenv(envVarRunID))
if err != nil {
fmt.Printf("error getting runID: %v\n", err)
os.Exit(1)
}
repoOwner := os.Getenv(envVarRepoOwner)
if targetRepoName == "" || targetRepoOwner == "" {
parts := strings.SplitN(repoFullName, "/", 2)
targetRepoOwner = parts[0]
targetRepoName = parts[1]
}
ctx := context.Background()
client, err := newGithubClient(ctx)
if err != nil {
fmt.Printf("error connecting to server: %v\n", err)
os.Exit(1)
}
approvers, err := retrieveApprovers(client, repoOwner)
if err != nil {
fmt.Printf("error retrieving approvers: %v\n", err)
os.Exit(1)
}
issueTitle := os.Getenv(envVarIssueTitle)
issueBody := os.Getenv(envVarIssueBody)
minimumApprovalsRaw := os.Getenv(envVarMinimumApprovals)
minimumApprovals := 0
if minimumApprovalsRaw != "" {
minimumApprovals, err = strconv.Atoi(minimumApprovalsRaw)
if err != nil {
fmt.Printf("error parsing minimum approvals: %v\n", err)
os.Exit(1)
}
}
apprv, err := newApprovalEnvironment(client, repoFullName, repoOwner, runID, approvers, minimumApprovals, issueTitle, issueBody, targetRepoOwner, targetRepoName)
if err != nil {
fmt.Printf("error creating approval environment: %v\n", err)
os.Exit(1)
}
err = apprv.createApprovalIssue(ctx)
if err != nil {
fmt.Printf("error creating issue: %v", err)
os.Exit(1)
}
killSignalChannel := make(chan os.Signal, 1)
signal.Notify(killSignalChannel, os.Interrupt)
commentLoopChannel := newCommentLoopChannel(ctx, apprv, client)
select {
case exitCode := <-commentLoopChannel:
os.Exit(exitCode)
case <-killSignalChannel:
handleInterrupt(ctx, client, apprv)
os.Exit(1)
}
}