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tailscale/cmd/k8s-operator/generate/main.go

75 lines
1.7 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
//go:build !plan9
package main
import (
"bytes"
"fmt"
"io"
"log"
"os"
"os/exec"
"path/filepath"
"strings"
"gopkg.in/yaml.v3"
)
func main() {
repoRoot := "../../"
cmd := exec.Command("./tool/helm", "template", "operator", "./cmd/k8s-operator/deploy/chart",
"--namespace=tailscale")
cmd.Dir = repoRoot
var out bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
log.Fatalf("error templating helm manifests: %v", err)
}
var final bytes.Buffer
templatePath := filepath.Join(repoRoot, "cmd/k8s-operator/deploy/manifests/templates")
fileInfos, err := os.ReadDir(templatePath)
if err != nil {
log.Fatalf("error reading templates: %v", err)
}
for _, fi := range fileInfos {
templateBytes, err := os.ReadFile(filepath.Join(templatePath, fi.Name()))
if err != nil {
log.Fatalf("error reading template: %v", err)
}
final.Write(templateBytes)
}
decoder := yaml.NewDecoder(&out)
for {
var document any
err := decoder.Decode(&document)
if err == io.EOF {
break
}
if err != nil {
log.Fatalf("failed read from input data: %v", err)
}
bytes, err := yaml.Marshal(document)
if err != nil {
log.Fatalf("failed to marshal YAML document: %v", err)
}
if strings.TrimSpace(string(bytes)) == "null" {
continue
}
if _, err = final.Write(bytes); err != nil {
log.Fatalf("error marshaling yaml: %v", err)
}
fmt.Fprint(&final, "---\n")
}
finalString, _ := strings.CutSuffix(final.String(), "---\n")
if err := os.WriteFile(filepath.Join(repoRoot, "cmd/k8s-operator/deploy/manifests/operator.yaml"), []byte(finalString), 0664); err != nil {
log.Fatalf("error writing new file: %v", err)
}
}