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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
// Package semconvkit is used to generate opentelemetry-go specific semantic
// convention code. It is expected to be used in with the semconvgen utility
// (go.opentelemetry.io/build-tools/semconvgen) to completely generate
// versioned sub-packages of go.opentelemetry.io/otel/semconv.
package main
import (
"embed"
"flag"
"log"
"os"
"path/filepath"
"strings"
"text/template"
)
var (
out = flag.String("output", "./", "output directory")
tag = flag.String("tag", "", "OpenTelemetry tagged version")
//go:embed templates/*.tmpl
rootFS embed.FS
)
// SemanticConventions are information about the semantic conventions being
// generated.
type SemanticConventions struct {
// TagVer is the tagged version (i.e. v1.7.0 and not 1.7.0).
TagVer string
}
func (sc SemanticConventions) SemVer() string {
return strings.TrimPrefix(*tag, "v")
}
// render renders all templates to the dest directory using the data.
func render(src, dest string, data *SemanticConventions) error {
tmpls, err := template.ParseFS(rootFS, src)
if err != nil {
return err
}
for _, tmpl := range tmpls.Templates() {
target := filepath.Join(dest, strings.TrimSuffix(tmpl.Name(), ".tmpl"))
wr, err := os.Create(target)
if err != nil {
return err
}
err = tmpl.Execute(wr, data)
if err != nil {
return err
}
}
return nil
}
func main() {
flag.Parse()
if *tag == "" {
log.Fatalf("invalid tag: %q", *tag)
}
sc := &SemanticConventions{TagVer: *tag}
if err := render("templates/*.tmpl", *out, sc); err != nil {
log.Fatal(err)
}
}
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