69f7f51375
This improves a few things about assets: * Compute and store hashes as input properties, so that changes on disk are recognized and trigger updates (pulumi/pulumi#153). * Issue explicit and prompt diagnostics when an asset is missing or of an unexpected kind, rather than failing late (pulumi/pulumi#156). * Permit raw directories to be passed as archives, in addition to archive formats like tar, zip, etc. (pulumi/pulumi#240). * Permit not only assets as elements of an archive's member list, but also other archives themselves (pulumi/pulumi#280).
142 lines
3.8 KiB
Go
142 lines
3.8 KiB
Go
// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
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package cmd
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/encoding"
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"github.com/pulumi/pulumi/pkg/resource/deploy"
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"github.com/pulumi/pulumi/pkg/resource/stack"
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"github.com/pulumi/pulumi/pkg/tokens"
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"github.com/pulumi/pulumi/pkg/util/contract"
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"github.com/pulumi/pulumi/pkg/workspace"
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)
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type localStackProvider struct{}
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func (p localStackProvider) GetTarget(name tokens.QName) (*deploy.Target, error) {
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contract.Require(name != "", "name")
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target, _, err := getStack(name)
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if err != nil {
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return nil, err
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}
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config, err := getConfiguration(name)
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if err != nil {
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return nil, err
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}
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target.Config = config
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return target, err
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}
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func (p localStackProvider) GetSnapshot(name tokens.QName) (*deploy.Snapshot, error) {
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contract.Require(name != "", "name")
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_, snapshot, err := getStack(name)
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return snapshot, err
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}
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func (p localStackProvider) SaveSnapshot(snapshot *deploy.Snapshot) error {
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target, _, err := getStack(snapshot.Namespace)
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if err != nil && !os.IsNotExist(err) {
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return err
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}
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if target == nil {
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target = &deploy.Target{Name: snapshot.Namespace}
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}
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return saveStack(target, snapshot)
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}
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func getStack(name tokens.QName) (*deploy.Target, *deploy.Snapshot, error) {
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contract.Require(name != "", "name")
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file := workspace.StackPath(name)
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// Detect the encoding of the file so we can do our initial unmarshaling.
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m, ext := encoding.Detect(file)
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if m == nil {
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return nil, nil, errors.Errorf("resource deserialization failed; illegal markup extension: '%v'", ext)
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}
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// Now read the whole file into a byte blob.
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b, err := ioutil.ReadFile(file)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, nil, err
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}
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return nil, nil, err
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}
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// Unmarshal the contents into a checkpoint structure.
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var checkpoint stack.Checkpoint
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if err = m.Unmarshal(b, &checkpoint); err != nil {
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return nil, nil, err
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}
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target, snapshot, err := stack.DeserializeCheckpoint(&checkpoint)
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if err != nil {
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return nil, nil, err
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}
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contract.Assert(target != nil)
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return target, snapshot, nil
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}
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func saveStack(target *deploy.Target, snap *deploy.Snapshot) error {
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contract.Require(target != nil, "target")
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file := workspace.StackPath(target.Name)
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// Make a serializable stack and then use the encoder to encode it.
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m, ext := encoding.Detect(file)
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if m == nil {
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return errors.Errorf("resource serialization failed; illegal markup extension: '%v'", ext)
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}
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if filepath.Ext(file) == "" {
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file = file + ext
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}
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dep := stack.SerializeCheckpoint(target, snap)
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b, err := m.Marshal(dep)
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if err != nil {
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return errors.Wrap(err, "An IO error occurred during the current operation")
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}
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// Back up the existing file if it already exists.
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backupTarget(file)
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// Ensure the directory exists.
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if err = os.MkdirAll(filepath.Dir(file), 0700); err != nil {
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return errors.Wrap(err, "An IO error occurred during the current operation")
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}
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// And now write out the new snapshot file, overwriting that location.
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if err = ioutil.WriteFile(file, b, 0600); err != nil {
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return errors.Wrap(err, "An IO error occurred during the current operation")
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}
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return nil
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}
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func removeStack(stack *deploy.Target) error {
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contract.Require(stack != nil, "stack")
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// Just make a backup of the file and don't write out anything new.
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file := workspace.StackPath(stack.Name)
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backupTarget(file)
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return nil
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}
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// backupTarget makes a backup of an existing file, in preparation for writing a new one. Instead of a copy, it
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// simply renames the file, which is simpler, more efficient, etc.
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func backupTarget(file string) {
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contract.Require(file != "", "file")
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err := os.Rename(file, file+".bak")
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contract.IgnoreError(err) // ignore errors.
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// IDEA: consider multiple backups (.bak.bak.bak...etc).
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}
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