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project_command_runner.go
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/
project_command_runner.go
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// Copyright 2017 HootSuite Media Inc.
//
// 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.
// Modified hereafter by contributors to runatlantis/atlantis.
//
package events
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
"github.com/runatlantis/atlantis/server/events/models"
"github.com/runatlantis/atlantis/server/events/runtime"
"github.com/runatlantis/atlantis/server/events/webhooks"
"github.com/runatlantis/atlantis/server/events/yaml/raw"
"github.com/runatlantis/atlantis/server/events/yaml/valid"
"github.com/runatlantis/atlantis/server/logging"
)
//go:generate pegomock generate -m --use-experimental-model-gen --package mocks -o mocks/mock_lock_url_generator.go LockURLGenerator
type LockURLGenerator interface {
GenerateLockURL(lockID string) string
}
//go:generate pegomock generate -m --use-experimental-model-gen --package mocks -o mocks/mock_step_runner.go StepRunner
type StepRunner interface {
Run(ctx models.ProjectCommandContext, extraArgs []string, path string) (string, error)
}
//go:generate pegomock generate -m --use-experimental-model-gen --package mocks -o mocks/mock_webhooks_sender.go WebhooksSender
type WebhooksSender interface {
Send(log *logging.SimpleLogger, res webhooks.ApplyResult) error
}
// PlanSuccess is the result of a successful plan.
type PlanSuccess struct {
TerraformOutput string
LockURL string
}
//go:generate pegomock generate -m --use-experimental-model-gen --package mocks -o mocks/mock_project_command_runner.go ProjectCommandRunner
type ProjectCommandRunner interface {
Plan(ctx models.ProjectCommandContext) ProjectCommandResult
Apply(ctx models.ProjectCommandContext) ProjectCommandResult
}
type DefaultProjectCommandRunner struct {
Locker ProjectLocker
LockURLGenerator LockURLGenerator
InitStepRunner StepRunner
PlanStepRunner StepRunner
ApplyStepRunner StepRunner
RunStepRunner StepRunner
PullApprovedChecker runtime.PullApprovedChecker
WorkingDir WorkingDir
Webhooks WebhooksSender
WorkingDirLocker WorkingDirLocker
RequireApprovalOverride bool
}
func (p *DefaultProjectCommandRunner) Plan(ctx models.ProjectCommandContext) ProjectCommandResult {
// Acquire Atlantis lock for this repo/dir/workspace.
lockAttempt, err := p.Locker.TryLock(ctx.Log, ctx.Pull, ctx.User, ctx.Workspace, models.NewProject(ctx.BaseRepo.FullName, ctx.RepoRelDir))
if err != nil {
return ProjectCommandResult{
Error: errors.Wrap(err, "acquiring lock"),
}
}
if !lockAttempt.LockAcquired {
return ProjectCommandResult{Failure: lockAttempt.LockFailureReason}
}
ctx.Log.Debug("acquired lock for project")
// Acquire internal lock for the directory we're going to operate in.
unlockFn, err := p.WorkingDirLocker.TryLock(ctx.BaseRepo.FullName, ctx.Workspace, ctx.Pull.Num)
if err != nil {
return ProjectCommandResult{Error: err}
}
defer unlockFn()
// Clone is idempotent so okay to run even if the repo was already cloned.
repoDir, cloneErr := p.WorkingDir.Clone(ctx.Log, ctx.BaseRepo, ctx.HeadRepo, ctx.Pull, ctx.Workspace)
if cloneErr != nil {
if unlockErr := lockAttempt.UnlockFn(); unlockErr != nil {
ctx.Log.Err("error unlocking state after plan error: %v", unlockErr)
}
return ProjectCommandResult{Error: cloneErr}
}
projAbsPath := filepath.Join(repoDir, ctx.RepoRelDir)
// Use default stage unless another workflow is defined in config
stage := p.defaultPlanStage()
if ctx.ProjectConfig != nil && ctx.ProjectConfig.Workflow != nil {
ctx.Log.Debug("project configured to use workflow %q", *ctx.ProjectConfig.Workflow)
configuredStage := ctx.GlobalConfig.GetPlanStage(*ctx.ProjectConfig.Workflow)
if configuredStage != nil {
ctx.Log.Debug("project will use the configured stage for that workflow")
stage = *configuredStage
}
}
outputs, err := p.runSteps(stage.Steps, ctx, projAbsPath)
if err != nil {
if unlockErr := lockAttempt.UnlockFn(); unlockErr != nil {
ctx.Log.Err("error unlocking state after plan error: %v", unlockErr)
}
return ProjectCommandResult{Error: fmt.Errorf("%s\n%s", err, strings.Join(outputs, "\n"))}
}
return ProjectCommandResult{
PlanSuccess: &PlanSuccess{
LockURL: p.LockURLGenerator.GenerateLockURL(lockAttempt.LockKey),
TerraformOutput: strings.Join(outputs, "\n"),
},
}
}
func (p *DefaultProjectCommandRunner) runSteps(steps []valid.Step, ctx models.ProjectCommandContext, absPath string) ([]string, error) {
var outputs []string
for _, step := range steps {
var out string
var err error
switch step.StepName {
case "init":
out, err = p.InitStepRunner.Run(ctx, step.ExtraArgs, absPath)
case "plan":
out, err = p.PlanStepRunner.Run(ctx, step.ExtraArgs, absPath)
case "apply":
out, err = p.ApplyStepRunner.Run(ctx, step.ExtraArgs, absPath)
case "run":
out, err = p.RunStepRunner.Run(ctx, step.RunCommand, absPath)
}
if out != "" {
outputs = append(outputs, out)
}
if err != nil {
return outputs, err
}
}
return outputs, nil
}
func (p *DefaultProjectCommandRunner) Apply(ctx models.ProjectCommandContext) ProjectCommandResult {
repoDir, err := p.WorkingDir.GetWorkingDir(ctx.BaseRepo, ctx.Pull, ctx.Workspace)
if err != nil {
if os.IsNotExist(err) {
return ProjectCommandResult{Error: errors.New("project has not been cloned–did you run plan?")}
}
return ProjectCommandResult{Error: err}
}
absPath := filepath.Join(repoDir, ctx.RepoRelDir)
var applyRequirements []string
if ctx.ProjectConfig != nil {
applyRequirements = ctx.ProjectConfig.ApplyRequirements
}
if p.RequireApprovalOverride {
applyRequirements = []string{raw.ApprovedApplyRequirement}
}
for _, req := range applyRequirements {
switch req {
case raw.ApprovedApplyRequirement:
approved, err := p.PullApprovedChecker.PullIsApproved(ctx.BaseRepo, ctx.Pull) // nolint: vetshadow
if err != nil {
return ProjectCommandResult{Error: errors.Wrap(err, "checking if pull request was approved")}
}
if !approved {
return ProjectCommandResult{Failure: "Pull request must be approved before running apply."}
}
}
}
// Acquire internal lock for the directory we're going to operate in.
unlockFn, err := p.WorkingDirLocker.TryLock(ctx.BaseRepo.FullName, ctx.Workspace, ctx.Pull.Num)
if err != nil {
return ProjectCommandResult{Error: err}
}
defer unlockFn()
// Use default stage unless another workflow is defined in config
stage := p.defaultApplyStage()
if ctx.ProjectConfig != nil && ctx.ProjectConfig.Workflow != nil {
configuredStage := ctx.GlobalConfig.GetApplyStage(*ctx.ProjectConfig.Workflow)
if configuredStage != nil {
stage = *configuredStage
}
}
outputs, err := p.runSteps(stage.Steps, ctx, absPath)
p.Webhooks.Send(ctx.Log, webhooks.ApplyResult{ // nolint: errcheck
Workspace: ctx.Workspace,
User: ctx.User,
Repo: ctx.BaseRepo,
Pull: ctx.Pull,
Success: err == nil,
})
if err != nil {
return ProjectCommandResult{Error: fmt.Errorf("%s\n%s", err, strings.Join(outputs, "\n"))}
}
return ProjectCommandResult{
ApplySuccess: strings.Join(outputs, "\n"),
}
}
func (p DefaultProjectCommandRunner) defaultPlanStage() valid.Stage {
return valid.Stage{
Steps: []valid.Step{
{
StepName: "init",
},
{
StepName: "plan",
},
},
}
}
func (p DefaultProjectCommandRunner) defaultApplyStage() valid.Stage {
return valid.Stage{
Steps: []valid.Step{
{
StepName: "apply",
},
},
}
}