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[chore] bump dependencies (#4339)

Browse source 
- github.com/KimMachineGun/automemlimit v0.7.4
- github.com/miekg/dns v1.1.67
- github.com/minio/minio-go/v7 v7.0.95
- github.com/spf13/pflag v1.0.7
- github.com/tdewolff/minify/v2 v2.23.9
- github.com/uptrace/bun v1.2.15
- github.com/uptrace/bun/dialect/pgdialect v1.2.15
- github.com/uptrace/bun/dialect/sqlitedialect v1.2.15
- github.com/uptrace/bun/extra/bunotel v1.2.15
- golang.org/x/image v0.29.0
- golang.org/x/net v0.42.0

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4339
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>
This commit is contained in:
kim 2025-07-22 18:00:27 +02:00 • committed by kim
commit c00cad2ceb
76 changed files with 5544 additions and 886 deletions
Download patch file Download diff file Expand all files Collapse all files

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# If you prefer the allow list template instead of the deny list, see community template:
# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
#
# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Test binary, built with `go test -c`
*.test
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# Dependency directories (remove the comment below to include it)
# vendor/
# Go workspace file
go.work
go.work.sum
# env file
.env

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formatters:
enable:
- gci
- gofumpt
settings:
gci:
sections:
- standard
- default
- prefix(github.com/prometheus/otlptranslator)
gofumpt:
extra-rules: true
issues:
max-issues-per-linter: 0
max-same-issues: 0
linters:
# Keep this list sorted alphabetically
enable:
- depguard
- errorlint
- exptostd
- gocritic
- godot
- loggercheck
- misspell
- nilnesserr
# TODO: Enable once https://github.com/golangci/golangci-lint/issues/3228 is fixed.
# - nolintlint
- perfsprint
- predeclared
- revive
- sloglint
- testifylint
- unconvert
- unused
- usestdlibvars
- whitespace
settings:
depguard:
rules:
main:
deny:
- pkg: sync/atomic
desc: Use go.uber.org/atomic instead of sync/atomic
- pkg: github.com/stretchr/testify/assert
desc: Use github.com/stretchr/testify/require instead of github.com/stretchr/testify/assert
- pkg: io/ioutil
desc: Use corresponding 'os' or 'io' functions instead.
- pkg: regexp
desc: Use github.com/grafana/regexp instead of regexp
- pkg: github.com/pkg/errors
desc: Use 'errors' or 'fmt' instead of github.com/pkg/errors
- pkg: golang.org/x/exp/slices
desc: Use 'slices' instead.
perfsprint:
# Optimizes `fmt.Errorf`.
errorf: true
revive:
# By default, revive will enable only the linting rules that are named in the configuration file.
# So, it's needed to explicitly enable all required rules here.
rules:
# https://github.com/mgechev/revive/blob/master/RULES_DESCRIPTIONS.md
- name: blank-imports
- name: comment-spacings
- name: context-as-argument
arguments:
# Allow functions with test or bench signatures.
- allowTypesBefore: '*testing.T,testing.TB'
- name: context-keys-type
- name: dot-imports
- name: early-return
arguments:
- preserveScope
# A lot of false positives: incorrectly identifies channel draining as "empty code block".
# See https://github.com/mgechev/revive/issues/386
- name: empty-block
disabled: true
- name: error-naming
- name: error-return
- name: error-strings
- name: errorf
- name: exported
- name: increment-decrement
- name: indent-error-flow
arguments:
- preserveScope
- name: range
- name: receiver-naming
- name: redefines-builtin-id
- name: superfluous-else
arguments:
- preserveScope
- name: time-naming
- name: unexported-return
- name: unreachable-code
- name: unused-parameter
- name: var-declaration
- name: var-naming
testifylint:
disable:
- float-compare
- go-require
enable-all: true
run:
timeout: 15m
version: "2"

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# Prometheus Community Code of Conduct
Prometheus follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/main/code-of-conduct.md).

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* Arthur Silva Sens (arthursens2005@gmail.com / @ArthurSens)
* Arve Knudsen (arve.knudsen@gmail.com / @aknuds1)
* Jesús Vázquez (jesus.vazquez@grafana.com / @jesusvazquez)
* Owen Williams (owen.williams@grafana.com / @ywwg)

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# otlp-prometheus-translator
Library providing API to convert OTLP metric and attribute names to respectively Prometheus metric and label names.

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# Reporting a security issue
The Prometheus security policy, including how to report vulnerabilities, can be
found here:
<https://prometheus.io/docs/operating/security/>

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// Copyright 2025 The Prometheus 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 otlptranslator
const (
// ExemplarTraceIDKey is the key used to store the trace ID in Prometheus
// exemplars:
// https://github.com/open-telemetry/opentelemetry-specification/blob/e6eccba97ebaffbbfad6d4358408a2cead0ec2df/specification/compatibility/prometheus_and_openmetrics.md#exemplars
ExemplarTraceIDKey = "trace_id"
// ExemplarSpanIDKey is the key used to store the Span ID in Prometheus
// exemplars:
// https://github.com/open-telemetry/opentelemetry-specification/blob/e6eccba97ebaffbbfad6d4358408a2cead0ec2df/specification/compatibility/prometheus_and_openmetrics.md#exemplars
ExemplarSpanIDKey = "span_id"
// ScopeNameLabelKey is the name of the label key used to identify the name
// of the OpenTelemetry scope which produced the metric:
// https://github.com/open-telemetry/opentelemetry-specification/blob/e6eccba97ebaffbbfad6d4358408a2cead0ec2df/specification/compatibility/prometheus_and_openmetrics.md#instrumentation-scope
ScopeNameLabelKey = "otel_scope_name"
// ScopeVersionLabelKey is the name of the label key used to identify the
// version of the OpenTelemetry scope which produced the metric:
// https://github.com/open-telemetry/opentelemetry-specification/blob/e6eccba97ebaffbbfad6d4358408a2cead0ec2df/specification/compatibility/prometheus_and_openmetrics.md#instrumentation-scope
ScopeVersionLabelKey = "otel_scope_version"
// TargetInfoMetricName is the name of the metric used to preserve resource
// attributes in Prometheus format:
// https://github.com/open-telemetry/opentelemetry-specification/blob/e6eccba97ebaffbbfad6d4358408a2cead0ec2df/specification/compatibility/prometheus_and_openmetrics.md#resource-attributes-1
// It originates from OpenMetrics:
// https://github.com/OpenObservability/OpenMetrics/blob/1386544931307dff279688f332890c31b6c5de36/specification/OpenMetrics.md#supporting-target-metadata-in-both-push-based-and-pull-based-systems
TargetInfoMetricName = "target_info"
)

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// Copyright 2025 The Prometheus 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.
// Provenance-includes-location: https://github.com/prometheus/prometheus/blob/93e991ef7ed19cc997a9360c8016cac3767b8057/storage/remote/otlptranslator/prometheus/metric_name_builder.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The Prometheus Authors
// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/normalize_name.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
package otlptranslator
import (
"slices"
"strings"
"unicode"
"github.com/grafana/regexp"
)
// The map to translate OTLP units to Prometheus units
// OTLP metrics use the c/s notation as specified at https://ucum.org/ucum.html
// (See also https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/semantic_conventions/README.md#instrument-units)
// Prometheus best practices for units: https://prometheus.io/docs/practices/naming/#base-units
// OpenMetrics specification for units: https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#units-and-base-units
var unitMap = map[string]string{
// Time
"d": "days",
"h": "hours",
"min": "minutes",
"s": "seconds",
"ms": "milliseconds",
"us": "microseconds",
"ns": "nanoseconds",
// Bytes
"By": "bytes",
"KiBy": "kibibytes",
"MiBy": "mebibytes",
"GiBy": "gibibytes",
"TiBy": "tibibytes",
"KBy": "kilobytes",
"MBy": "megabytes",
"GBy": "gigabytes",
"TBy": "terabytes",
// SI
"m": "meters",
"V": "volts",
"A": "amperes",
"J": "joules",
"W": "watts",
"g": "grams",
// Misc
"Cel": "celsius",
"Hz": "hertz",
"1": "",
"%": "percent",
}
// The map that translates the "per" unit.
// Example: s => per second (singular).
var perUnitMap = map[string]string{
"s": "second",
"m": "minute",
"h": "hour",
"d": "day",
"w": "week",
"mo": "month",
"y": "year",
}
// MetricNamer is a helper struct to build metric names.
type MetricNamer struct {
Namespace string
WithMetricSuffixes bool
UTF8Allowed bool
}
// Metric is a helper struct that holds information about a metric.
type Metric struct {
Name string
Unit string
Type MetricType
}
// Build builds a metric name for the specified metric.
//
// If UTF8Allowed is true, the metric name is returned as is, only with the addition of type/unit suffixes and namespace preffix if required.
// Otherwise the metric name is normalized to be Prometheus-compliant.
// See rules at https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels,
// https://prometheus.io/docs/practices/naming/#metric-and-label-naming
func (mn *MetricNamer) Build(metric Metric) string {
if mn.UTF8Allowed {
return mn.buildMetricName(metric.Name, metric.Unit, metric.Type)
}
return mn.buildCompliantMetricName(metric.Name, metric.Unit, metric.Type)
}
func (mn *MetricNamer) buildCompliantMetricName(name, unit string, metricType MetricType) string {
// Full normalization following standard Prometheus naming conventions
if mn.WithMetricSuffixes {
return normalizeName(name, unit, metricType, mn.Namespace)
}
// Simple case (no full normalization, no units, etc.).
metricName := strings.Join(strings.FieldsFunc(name, func(r rune) bool {
return invalidMetricCharRE.MatchString(string(r))
}), "_")
// Namespace?
if mn.Namespace != "" {
namespace := strings.Join(strings.FieldsFunc(mn.Namespace, func(r rune) bool {
return invalidMetricCharRE.MatchString(string(r))
}), "_")
return namespace + "_" + metricName
}
// Metric name starts with a digit? Prefix it with an underscore.
if metricName != "" && unicode.IsDigit(rune(metricName[0])) {
metricName = "_" + metricName
}
return metricName
}
var (
// Regexp for metric name characters that should be replaced with _.
invalidMetricCharRE = regexp.MustCompile(`[^a-zA-Z0-9:_]`)
multipleUnderscoresRE = regexp.MustCompile(`__+`)
)
// isValidCompliantMetricChar checks if a rune is a valid metric name character (a-z, A-Z, 0-9, :).
func isValidCompliantMetricChar(r rune) bool {
return (r >= 'a' && r <= 'z') ||
(r >= 'A' && r <= 'Z') ||
(r >= '0' && r <= '9') ||
r == ':'
}
// replaceInvalidMetricChar replaces invalid metric name characters with underscore.
func replaceInvalidMetricChar(r rune) rune {
if isValidCompliantMetricChar(r) {
return r
}
return '_'
}
// Build a normalized name for the specified metric.
func normalizeName(name, unit string, metricType MetricType, namespace string) string {
// Split metric name into "tokens" (of supported metric name runes).
// Note that this has the side effect of replacing multiple consecutive underscores with a single underscore.
// This is part of the OTel to Prometheus specification: https://github.com/open-telemetry/opentelemetry-specification/blob/v1.38.0/specification/compatibility/prometheus_and_openmetrics.md#otlp-metric-points-to-prometheus.
nameTokens := strings.FieldsFunc(
name,
func(r rune) bool { return !isValidCompliantMetricChar(r) },
)
mainUnitSuffix, perUnitSuffix := buildUnitSuffixes(unit)
nameTokens = addUnitTokens(nameTokens, cleanUpUnit(mainUnitSuffix), cleanUpUnit(perUnitSuffix))
// Append _total for Counters
if metricType == MetricTypeMonotonicCounter {
nameTokens = append(removeItem(nameTokens, "total"), "total")
}
// Append _ratio for metrics with unit "1"
// Some OTel receivers improperly use unit "1" for counters of objects
// See https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aissue+some+metric+units+don%27t+follow+otel+semantic+conventions
// Until these issues have been fixed, we're appending `_ratio` for gauges ONLY
// Theoretically, counters could be ratios as well, but it's absurd (for mathematical reasons)
if unit == "1" && metricType == MetricTypeGauge {
nameTokens = append(removeItem(nameTokens, "ratio"), "ratio")
}
// Namespace?
if namespace != "" {
nameTokens = append([]string{namespace}, nameTokens...)
}
// Build the string from the tokens, separated with underscores
normalizedName := strings.Join(nameTokens, "_")
// Metric name cannot start with a digit, so prefix it with "_" in this case
if normalizedName != "" && unicode.IsDigit(rune(normalizedName[0])) {
normalizedName = "_" + normalizedName
}
return normalizedName
}
// addUnitTokens will add the suffixes to the nameTokens if they are not already present.
// It will also remove trailing underscores from the main suffix to avoid double underscores
// when joining the tokens.
//
// If the 'per' unit ends with underscore, the underscore will be removed. If the per unit is just
// 'per_', it will be entirely removed.
func addUnitTokens(nameTokens []string, mainUnitSuffix, perUnitSuffix string) []string {
if slices.Contains(nameTokens, mainUnitSuffix) {
mainUnitSuffix = ""
}
if perUnitSuffix == "per_" {
perUnitSuffix = ""
} else {
perUnitSuffix = strings.TrimSuffix(perUnitSuffix, "_")
if slices.Contains(nameTokens, perUnitSuffix) {
perUnitSuffix = ""
}
}
if perUnitSuffix != "" {
mainUnitSuffix = strings.TrimSuffix(mainUnitSuffix, "_")
}
if mainUnitSuffix != "" {
nameTokens = append(nameTokens, mainUnitSuffix)
}
if perUnitSuffix != "" {
nameTokens = append(nameTokens, perUnitSuffix)
}
return nameTokens
}
// Remove the specified value from the slice.
func removeItem(slice []string, value string) []string {
newSlice := make([]string, 0, len(slice))
for _, sliceEntry := range slice {
if sliceEntry != value {
newSlice = append(newSlice, sliceEntry)
}
}
return newSlice
}
func (mn *MetricNamer) buildMetricName(name, unit string, metricType MetricType) string {
if mn.Namespace != "" {
name = mn.Namespace + "_" + name
}
if mn.WithMetricSuffixes {
mainUnitSuffix, perUnitSuffix := buildUnitSuffixes(unit)
if mainUnitSuffix != "" {
name = name + "_" + mainUnitSuffix
}
if perUnitSuffix != "" {
name = name + "_" + perUnitSuffix
}
// Append _total for Counters
if metricType == MetricTypeMonotonicCounter {
name += "_total"
}
// Append _ratio for metrics with unit "1"
// Some OTel receivers improperly use unit "1" for counters of objects
// See https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aissue+some+metric+units+don%27t+follow+otel+semantic+conventions
// Until these issues have been fixed, we're appending `_ratio` for gauges ONLY
// Theoretically, counters could be ratios as well, but it's absurd (for mathematical reasons)
if unit == "1" && metricType == MetricTypeGauge {
name += "_ratio"
}
}
return name
}

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// Copyright 2025 The Prometheus 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
package otlptranslator
// MetricType is a representation of metric types from OpenTelemetry.
// Different types of Sums were introduced based on their metric temporalities.
// For more details, see:
// https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/metrics/data-model.md#sums
type MetricType int
const (
// MetricTypeUnknown represents an unknown metric type.
MetricTypeUnknown = iota
// MetricTypeNonMonotonicCounter represents a counter that is not monotonically increasing, also known as delta counter.
MetricTypeNonMonotonicCounter
// MetricTypeMonotonicCounter represents a counter that is monotonically increasing, also known as cumulative counter.
MetricTypeMonotonicCounter
// MetricTypeGauge represents a gauge metric.
MetricTypeGauge
// MetricTypeHistogram represents a histogram metric.
MetricTypeHistogram
// MetricTypeExponentialHistogram represents an exponential histogram metric.
MetricTypeExponentialHistogram
// MetricTypeSummary represents a summary metric.
MetricTypeSummary
)

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// Copyright 2025 The Prometheus 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.
// Provenance-includes-location: https://github.com/prometheus/prometheus/blob/93e991ef7ed19cc997a9360c8016cac3767b8057/storage/remote/otlptranslator/prometheus/normalize_label.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The Prometheus Authors
// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/normalize_label.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
package otlptranslator
import (
"strings"
"unicode"
)
// LabelNamer is a helper struct to build label names.
type LabelNamer struct {
UTF8Allowed bool
}
// Build normalizes the specified label to follow Prometheus label names standard.
//
// See rules at https://prometheus.io/docs/concepts/data_model/#metric-names-and-labels.
//
// Labels that start with non-letter rune will be prefixed with "key_".
// An exception is made for double-underscores which are allowed.
//
// If UTF8Allowed is true, the label is returned as is. This option is provided just to
// keep a consistent interface with the MetricNamer.
func (ln *LabelNamer) Build(label string) string {
// Trivial case.
if len(label) == 0 || ln.UTF8Allowed {
return label
}
label = sanitizeLabelName(label)
// If label starts with a number, prepend with "key_".
if unicode.IsDigit(rune(label[0])) {
label = "key_" + label
} else if strings.HasPrefix(label, "_") && !strings.HasPrefix(label, "__") {
label = "key" + label
}
return label
}

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// Copyright 2025 The Prometheus 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.
// Provenance-includes-location: https://github.com/prometheus/prometheus/blob/93e991ef7ed19cc997a9360c8016cac3767b8057/storage/remote/otlptranslator/prometheus/strconv.go.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The Prometheus Authors
// Provenance-includes-location: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/95e8f8fdc2a9dc87230406c9a3cf02be4fd68bea/pkg/translator/prometheus/normalize_name_test.go
// Provenance-includes-license: Apache-2.0
// Provenance-includes-copyright: Copyright The OpenTelemetry Authors.
package otlptranslator
import (
"strings"
)
// sanitizeLabelName replaces any characters not valid according to the
// classical Prometheus label naming scheme with an underscore.
// Note: this does not handle all Prometheus label name restrictions (such as
// not starting with a digit 0-9), and hence should only be used if the label
// name is prefixed with a known valid string.
func sanitizeLabelName(name string) string {
var b strings.Builder
b.Grow(len(name))
for _, r := range name {
if (r >= 'a' && r <= 'z') || (r >= 'A' && r <= 'Z') || (r >= '0' && r <= '9') {
b.WriteRune(r)
} else {
b.WriteRune('_')
}
}
return b.String()
}

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// Copyright 2025 The Prometheus 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
package otlptranslator
import "strings"
// UnitNamer is a helper for building compliant unit names.
type UnitNamer struct {
UTF8Allowed bool
}
// Build builds a unit name for the specified unit string.
// It processes the unit by splitting it into main and per components,
// applying appropriate unit mappings, and cleaning up invalid characters
// when the whole UTF-8 character set is not allowed.
func (un *UnitNamer) Build(unit string) string {
mainUnit, perUnit := buildUnitSuffixes(unit)
if !un.UTF8Allowed {
mainUnit, perUnit = cleanUpUnit(mainUnit), cleanUpUnit(perUnit)
}
var u string
switch {
case mainUnit != "" && perUnit != "":
u = mainUnit + "_" + perUnit
case mainUnit != "":
u = mainUnit
default:
u = perUnit
}
// Clean up leading and trailing underscores
if len(u) > 0 && u[0:1] == "_" {
u = u[1:]
}
if len(u) > 0 && u[len(u)-1:] == "_" {
u = u[:len(u)-1]
}
return u
}
// Retrieve the Prometheus "basic" unit corresponding to the specified "basic" unit.
// Returns the specified unit if not found in unitMap.
func unitMapGetOrDefault(unit string) string {
if promUnit, ok := unitMap[unit]; ok {
return promUnit
}
return unit
}
// Retrieve the Prometheus "per" unit corresponding to the specified "per" unit.
// Returns the specified unit if not found in perUnitMap.
func perUnitMapGetOrDefault(perUnit string) string {
if promPerUnit, ok := perUnitMap[perUnit]; ok {
return promPerUnit
}
return perUnit
}
// buildUnitSuffixes builds the main and per unit suffixes for the specified unit
// but doesn't do any special character transformation to accommodate Prometheus naming conventions.
// Removing trailing underscores or appending suffixes is done in the caller.
func buildUnitSuffixes(unit string) (mainUnitSuffix, perUnitSuffix string) {
// Split unit at the '/' if any
unitTokens := strings.SplitN(unit, "/", 2)
if len(unitTokens) > 0 {
// Main unit
// Update if not blank and doesn't contain '{}'
mainUnitOTel := strings.TrimSpace(unitTokens[0])
if mainUnitOTel != "" && !strings.ContainsAny(mainUnitOTel, "{}") {
mainUnitSuffix = unitMapGetOrDefault(mainUnitOTel)
}
// Per unit
// Update if not blank and doesn't contain '{}'
if len(unitTokens) > 1 && unitTokens[1] != "" {
perUnitOTel := strings.TrimSpace(unitTokens[1])
if perUnitOTel != "" && !strings.ContainsAny(perUnitOTel, "{}") {
perUnitSuffix = perUnitMapGetOrDefault(perUnitOTel)
}
if perUnitSuffix != "" {
perUnitSuffix = "per_" + perUnitSuffix
}
}
}
return mainUnitSuffix, perUnitSuffix
}
// cleanUpUnit cleans up unit so it matches model.LabelNameRE.
func cleanUpUnit(unit string) string {
// Multiple consecutive underscores are replaced with a single underscore.
// This is part of the OTel to Prometheus specification: https://github.com/open-telemetry/opentelemetry-specification/blob/v1.38.0/specification/compatibility/prometheus_and_openmetrics.md#otlp-metric-points-to-prometheus.
return strings.TrimPrefix(multipleUnderscoresRE.ReplaceAllString(
strings.Map(replaceInvalidMetricChar, unit),
"_",
), "_")
}