mirror of
https://github.com/coreos/prometheus-operator.git
synced 2026-02-06 00:47:16 +01:00
24ea585631
* Refactor the common implementation code (not including tests) between Prometheus's modes
76 lines
2.4 KiB
Go
76 lines
2.4 KiB
Go
// Copyright 2020 The prometheus-operator Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package operator
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import (
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"fmt"
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"strings"
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ref "github.com/distribution/reference"
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)
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// BuildImagePath builds a container image path based on
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// the given parameters.
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// Return specImage if not empty.
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// If image contains a tag or digest then image will be returned.
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// Otherwise, return image suffixed by either SHA, tag or version(in that order).
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// Inspired by kubernetes code handling of image building.
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func BuildImagePath(specImage, baseImage, version, tag, sha string) (string, error) {
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if strings.TrimSpace(specImage) != "" {
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return specImage, nil
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}
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named, err := ref.ParseNormalizedNamed(baseImage)
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if err != nil {
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return "", fmt.Errorf("couldn't parse image reference %q: %v", baseImage, err)
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}
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_, isTagged := named.(ref.Tagged)
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_, isDigested := named.(ref.Digested)
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if isTagged || isDigested {
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return baseImage, nil
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}
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if sha != "" {
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return fmt.Sprintf("%s@sha256:%s", baseImage, sha), nil
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} else if tag != "" {
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imageTag, err := ref.WithTag(named, tag)
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if err != nil {
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return "", err
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}
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return imageTag.String(), nil
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}
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if version == "" {
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return "", fmt.Errorf("couldn't generate an image reference since version is empty")
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}
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return baseImage + ":" + version, nil
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}
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// BuildImagePathForAgent builds a container image path based on
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// the given parameters for Prometheus Agent.
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// Return specImage if not empty.
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// Otherwise a combination of baseImage and version.
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func BuildImagePathForAgent(specImage, baseImage, version string) (string, error) {
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return BuildImagePath(specImage, baseImage, version, "", "")
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}
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// StringValOrDefault returns the default val if the
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// given string is empty/whitespace.
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// Otherwise returns the value of the string..
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func StringValOrDefault(val, defaultVal string) string {
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if strings.TrimSpace(val) == "" {
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return defaultVal
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}
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return val
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}
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