mirror of
https://github.com/hanzoai/telemetry.git
synced 2026-10-30 20:01:49 +00:00
Damien MathieuandGitHub
d113af6e49
We are going to want to be able to initialize collectors with specific configurations (the `--from-config` option will allow building a new manifest out of an existing collector config). So this changes the manifest initialization, out of a template, and to using the actual `Config` struct. I had to setup manual omission of nil/empty values, as mapstructure's omitempty seems to only ignore structs, not maps or strings.
145 lines
3.5 KiB
Go
145 lines
3.5 KiB
Go
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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package internal // import "go.opentelemetry.io/collector/cmd/builder/internal"
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import (
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"bytes"
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"embed"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path"
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"path/filepath"
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"text/template"
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"github.com/spf13/cobra"
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"go.opentelemetry.io/collector/cmd/builder/internal/builder"
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)
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const defaultDescription = "Custom OpenTelemetry Collector"
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//go:embed init/templates/*.tmpl
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var templatesFS embed.FS
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type metadata struct {
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Name string
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Description string
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StableVersion string
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BetaVersion string
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}
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func initCommand() *cobra.Command {
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var outputPath string
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cmd := &cobra.Command{
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Use: "init",
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Short: "[EXPERIMENTAL] Initializes a new custom collector repository in the provided folder",
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Long: `ocb init initializes a new repository in the provided folder with a manifest to start building a custom Collector. This command is experimental and very likely to change.`,
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Args: cobra.NoArgs,
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RunE: func(_ *cobra.Command, _ []string) error {
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return run(outputPath)
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},
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}
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cmd.Flags().StringVar(&outputPath, "path", ".", "Output path where the collector repository will be initialized")
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return cmd
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}
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func run(path string) error {
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if path == "" {
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return errors.New("argument must be a folder")
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}
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path, err := filepath.Abs(path)
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if err != nil {
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return fmt.Errorf("failed to get absolute path for %v: %w", path, err)
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}
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err = os.MkdirAll(path, 0o750)
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if err != nil {
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return fmt.Errorf("failed creating folder %v: %w", path, err)
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}
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meta := metadata{
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Name: filepath.Base(path),
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Description: defaultDescription,
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StableVersion: builder.DefaultStableOtelColVersion,
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BetaVersion: builder.DefaultBetaOtelColVersion,
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}
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err = writeTemplate(path, "manifest.yaml", meta)
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if err != nil {
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return fmt.Errorf("failed writing manifest: %w", err)
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}
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err = writeTemplate(path, ".gitignore", meta)
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if err != nil {
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return fmt.Errorf("failed writing gitignore: %w", err)
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}
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err = writeTemplate(path, "README.md", meta)
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if err != nil {
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return fmt.Errorf("failed writing README: %w", err)
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}
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err = writeTemplate(path, "go.mod", meta)
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if err != nil {
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return fmt.Errorf("failed writing go.mod: %w", err)
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}
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err = writeTemplate(path, "Makefile", meta)
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if err != nil {
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return fmt.Errorf("failed writing Makefile: %w", err)
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}
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err = writeTemplate(path, "config.yaml", meta)
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if err != nil {
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return fmt.Errorf("failed writing config.yaml: %w", err)
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}
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err = os.MkdirAll(filepath.Join(path, "build"), 0o750)
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if err != nil {
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return fmt.Errorf("failed creating build folder: %w", err)
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}
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err = runTidy(path)
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if err != nil {
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return fmt.Errorf("failed running go mod tidy: %w", err)
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}
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return nil
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}
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func writeTemplate(path, fn string, m metadata) error {
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outputFile := filepath.Join(path, fn)
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content, err := executeTemplate(fn+".tmpl", m)
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if err != nil {
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return err
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}
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return os.WriteFile(outputFile, content, 0o600)
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}
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func executeTemplate(tmplFile string, m metadata) ([]byte, error) {
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tmplPath := path.Join("init/templates", tmplFile)
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tmpl := template.Must(template.New(tmplFile).ParseFS(templatesFS, tmplPath))
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buf := bytes.Buffer{}
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if err := tmpl.Execute(&buf, m); err != nil {
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return []byte{}, fmt.Errorf("failed executing template: %w", err)
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}
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return buf.Bytes(), nil
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}
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func runTidy(path string) error {
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cmd := exec.Command("go", "mod", "tidy")
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cmd.Dir = path
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output, err := cmd.CombinedOutput()
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if err != nil {
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return fmt.Errorf("%w (%s)", err, string(output))
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}
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return nil
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}
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