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mirror of https://github.com/open-telemetry/opentelemetry-go.git synced 2024-12-14 10:13:10 +02:00
opentelemetry-go/schema/internal/parser_checks.go
Tigran Najaryan 1eae91b3b0
Introduce "split" metric schema transformation (#2999)
This is a new transformation type that allows to describe a change
where a metric is converted to several other metrics by eliminating
an attribute.

An example of such change that happened recently is this:
https://github.com/open-telemetry/opentelemetry-specification/pull/2617

This PR implements specification change https://github.com/open-telemetry/opentelemetry-specification/pull/2653

This PR creates package v1.1 for the new functionality. The old package v1.0
remains unchanged.
2022-07-25 08:30:23 -07:00

75 lines
2.4 KiB
Go

// Copyright The OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package internal // import "go.opentelemetry.io/otel/schema/internal"
import (
"errors"
"fmt"
"net/url"
"strconv"
"strings"
"github.com/Masterminds/semver/v3"
)
// CheckFileFormatField validates the file format field according to the rules here:
// https://github.com/open-telemetry/oteps/blob/main/text/0152-telemetry-schemas.md#schema-file-format-number
func CheckFileFormatField(fileFormat string, supportedFormatMajor, supportedFormatMinor int) error {
// Verify that the version number in the file is a semver.
fileFormatParsed, err := semver.StrictNewVersion(fileFormat)
if err != nil {
return fmt.Errorf(
"invalid schema file format version number %q (expected semver): %w",
fileFormat, err,
)
}
// Check that the major version number in the file is the same as what we expect.
if fileFormatParsed.Major() != uint64(supportedFormatMajor) {
return fmt.Errorf(
"this library cannot parse file formats with major version other than %v",
supportedFormatMajor,
)
}
// Check that the file minor version number is not greater than
// what is requested supports.
if fileFormatParsed.Minor() > uint64(supportedFormatMinor) {
supportedFormatMajorMinor := strconv.Itoa(supportedFormatMajor) + "." +
strconv.Itoa(supportedFormatMinor) // 1.0
return fmt.Errorf(
"unsupported schema file format minor version number, expected no newer than %v, got %v",
supportedFormatMajorMinor+".x", fileFormat,
)
}
// Patch, prerelease and metadata version number does not matter, so we don't check it.
return nil
}
// CheckSchemaURL verifies that schemaURL is valid.
func CheckSchemaURL(schemaURL string) error {
if strings.TrimSpace(schemaURL) == "" {
return errors.New("schema_url field is missing")
}
if _, err := url.Parse(schemaURL); err != nil {
return fmt.Errorf("invalid URL specified in schema_url field: %w", err)
}
return nil
}