e361098941
Previously, config information was stored per stack. With this change,
we now allow config values which apply to every stack a program may
target.
When passed without the `-s <stack>` argument, `pulumi config`
operates on the "global" configuration. Stack specific information can
be modified by passing an explicit stack.
Stack specific configuration overwrites global configuration.
Conside the following Pulumi.yaml:
```
name: hello-world
runtime: nodejs
description: a hello world program
config:
hello-world:config:message Hello, from Pulumi
stacks:
production:
config:
hello-world:config:message Hello, from Production
```
This program contains a single configuration value,
"hello-world:config:message" which has the value "Hello, from Pulumi"
when the program is activated into any stack except for "production"
where the value is "Hello, from Production".
139 lines
3.7 KiB
Go
139 lines
3.7 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 := stack.DeserializeCheckpoint(&checkpoint)
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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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