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Add interfaces for Image Watcher #902
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load("@io_bazel_rules_go//go:def.bzl", "go_library") | ||
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go_library( | ||
name = "go_default_library", | ||
srcs = ["watcher.go"], | ||
importpath = "github.com/pipe-cd/pipe/pkg/app/piped/imagewatcher", | ||
visibility = ["//visibility:public"], | ||
deps = ["@org_uber_go_zap//:go_default_library"], | ||
) |
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Original file line number | Diff line number | Diff line change |
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// Copyright 2020 The PipeCD 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. | ||
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// Package imagewatcher provides a piped component | ||
// that periodically checks the image registry and updates | ||
// the image if there are differences with Git. | ||
package imagewatcher | ||
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import ( | ||
"context" | ||
"time" | ||
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"go.uber.org/zap" | ||
) | ||
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type Watcher interface { | ||
Run(context.Context) error | ||
} | ||
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type watcher struct { | ||
timer *time.Timer | ||
logger *zap.Logger | ||
} | ||
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type imageRepos map[string]imageRepo | ||
type imageRepo struct { | ||
} | ||
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func NewWatcher(interval time.Duration, logger *zap.Logger) Watcher { | ||
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return &watcher{ | ||
timer: time.NewTimer(interval), | ||
} | ||
} | ||
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func (w *watcher) Run(ctx context.Context) error { | ||
for { | ||
select { | ||
case <-ctx.Done(): | ||
return nil | ||
case <-w.timer.C: | ||
reposInReg := w.fetchFromRegistry() | ||
reposInGit := w.fetchFromGit() | ||
outdated := calculateChanges(reposInReg, reposInGit) | ||
if err := w.update(outdated); err != nil { | ||
w.logger.Error("failed to update image", zap.Error(err)) | ||
} | ||
} | ||
} | ||
return nil | ||
} | ||
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func (w *watcher) fetchFromRegistry() imageRepos { | ||
return nil | ||
} | ||
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func (w *watcher) fetchFromGit() imageRepos { | ||
return nil | ||
} | ||
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func (w *watcher) update(targets imageRepos) error { | ||
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return nil | ||
} | ||
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// calculateChanges compares between image repos in the image registry and | ||
// image repos in git. And then gives back image repos to be updated. | ||
func calculateChanges(x, y imageRepos) imageRepos { | ||
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return nil | ||
} |
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typo:
gcr
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Thanks, a big mistake.