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terraform.go
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terraform.go
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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.
package terraform
import (
"context"
"fmt"
"io"
"time"
"go.uber.org/zap"
"github.com/pipe-cd/pipecd/pkg/app/piped/planner"
provider "github.com/pipe-cd/pipecd/pkg/app/piped/platformprovider/terraform"
"github.com/pipe-cd/pipecd/pkg/model"
)
// Planner plans the deployment pipeline for terraform application.
type Planner struct {
}
type registerer interface {
Register(k model.ApplicationKind, p planner.Planner) error
}
// Register registers this planner into the given registerer.
func Register(r registerer) {
r.Register(model.ApplicationKind_TERRAFORM, &Planner{})
}
// Plan decides which pipeline should be used for the given input.
func (p *Planner) Plan(ctx context.Context, in planner.Input) (out planner.Output, err error) {
ds, err := in.TargetDSP.Get(ctx, io.Discard)
if err != nil {
err = fmt.Errorf("error while preparing deploy source data (%v)", err)
return
}
cfg := ds.ApplicationConfig.TerraformApplicationSpec
if cfg == nil {
err = fmt.Errorf("missing TerraformApplicationSpec in application configuration")
return
}
// In case the strategy has been decided by trigger.
// For example: user triggered the deployment via web console.
switch in.Trigger.SyncStrategy {
case model.SyncStrategy_QUICK_SYNC:
out.SyncStrategy = model.SyncStrategy_QUICK_SYNC
out.Stages = buildQuickSyncPipeline(cfg.Input.AutoRollback, time.Now())
out.Summary = in.Trigger.StrategySummary
return
case model.SyncStrategy_PIPELINE:
if cfg.Pipeline == nil {
err = fmt.Errorf("unable to force sync with pipeline because no pipeline was specified")
return
}
out.SyncStrategy = model.SyncStrategy_PIPELINE
out.Stages = buildProgressivePipeline(cfg.Pipeline, cfg.Input.AutoRollback, time.Now())
out.Summary = in.Trigger.StrategySummary
return
}
now := time.Now()
out.Version = "N/A"
files, err := provider.LoadTerraformFiles(ds.AppDir)
if err != nil {
return
}
out.Versions, err = provider.FindArtifactVersions(files)
if err != nil {
in.Logger.Warn("unable to determine target versions", zap.Error(err))
out.Versions = []*model.ArtifactVersion{
{
Kind: model.ArtifactVersion_UNKNOWN,
Version: "unknown",
},
}
}
if cfg.Pipeline == nil || len(cfg.Pipeline.Stages) == 0 {
out.SyncStrategy = model.SyncStrategy_QUICK_SYNC
out.Stages = buildQuickSyncPipeline(cfg.Input.AutoRollback, now)
out.Summary = "Quick sync by automatically applying any detected changes because no pipeline was configured"
return
}
// Force to use pipeline when the alwaysUsePipeline field was configured.
if cfg.Planner.AlwaysUsePipeline {
out.SyncStrategy = model.SyncStrategy_PIPELINE
out.Stages = buildProgressivePipeline(cfg.Pipeline, cfg.Input.AutoRollback, time.Now())
out.Summary = "Sync with the specified pipeline (alwaysUsePipeline was set)"
return
}
out.SyncStrategy = model.SyncStrategy_PIPELINE
out.Stages = buildProgressivePipeline(cfg.Pipeline, cfg.Input.AutoRollback, now)
out.Summary = "Sync with the specified progressive pipeline"
return
}