Commit graph

1488 commits

Author SHA1 Message Date
joeduffy
d2d24612e8 Fix test import issue 2018-09-05 07:32:42 -07:00
joeduffy
d28f0cb7b6 Alter the login prompt
This change alters the login prompt slightly, so that it is more
obvious that alternative methods exist.

Before this change, we would say:

    $ pulumi login
    We need your Pulumi account to identify you.
    Enter your access token from https://app.pulumi.com/account
        or hit <ENTER> to log in using your browser            :

After this change, we say this instead:

    $ pulumi login
    Manage your Pulumi stacks by logging in.
    Run `pulumi login --help` for alternative login options.
    Enter your access token from https://app.pulumi.com/account
        or hit <ENTER> to log in using your browser            :

Also updated the help text to advertise this a bit more prominently.
2018-09-05 07:32:42 -07:00
joeduffy
feaea31f7b Rename backend packages
This renames the backend packages to more closely align with the
new direction for them. Namely, pkg/backend/cloud becomes
pkg/backend/httpstate and pkg/backend/local becomes
pkg/backend/filestate. This also helps to clarify that these are meant
to be around state management and so the upcoming refactoring required
to split out (e.g.) the display logic (amongst other things) will make
more sense, and we'll need better package names for those too.
2018-09-05 07:32:42 -07:00
joeduffy
126d31c9c2 Simplify logging into the local backend
As part of making the local backend more prominent, this changes a few
aspects of how you use it:

* Simplify how you log into a specific cloud; rather than
  `pulumi login --cloud-url <url>`, just say `pulumi login <url>`.

* Use a proper URL scheme to denote local backend usage. We have chosen
  file://, since the REST API backend is of course always https://.
  This means that you can say `pulumi login file://~` to use the local
  backend, with state files stored in your home directory. Similarly,
  we support `pulumi login file://.` for the current directory.

* Add a --local flag to the login command, to make local logins a
  bit easier in the common case of using your home directory. Just say
  `pulumi login --local` and it is sugar for `pulumi login file://~`.

* Print the URL for the backend after logging in; for the cloud,
  this is just the user's stacks page, and for the local backend,
  this is the path to the user's stacks directory on disk.

* Tidy up the documentation for login a bit to be clearer about this.

This is part of pulumi/pulumi#1818.
2018-09-05 07:32:42 -07:00
CyrusNajmabadi
90ce5231ab
Disable colors if we're not in an interactive session. (#1878) 2018-09-05 00:31:15 -07:00
Matt Ellis
9ec695dda0 Reformat call to action when we fail to launch browser for login
The existing message put the URL to visit and some explanation text on
the same line, which makes it a little harder to copy only the URL
into a browser. If this extra text ends up being copied as well as the
URL it can lead to failures later, when we try to decode the query
string as part of the OAuth flow.

It's easy enough to fix by just putting the URL on its own line, split
off from the text itself.

Fixes #1832
2018-09-04 14:28:29 -07:00
Justin Van Patten
5586f4ecad
Improve the error message for pulumi new when the template doesn't exist (#1823)
And offer distance-based suggestions.
2018-09-04 08:40:59 -07:00
Joe Duffy
fd852754fd
Merge pull request #1848 from pulumi/joeduffy/1551_refresh_text_clarification
Clarify refresh text
2018-09-02 11:58:50 -07:00
joeduffy
4827c7fb29 Update some text/colors
This changes two things:

1) Per PR feedback, change the text to "N changes found during refresh."

2) Colorize the parenthetical "No resources will be modified" message;
   it looked a little odd being plain colored.
2018-09-02 11:26:39 -07:00
Alex Clemmer
dea68b8b37 Implement status sinks
This commit reverts most of #1853 and replaces it with functionally
identical logic, using the notion of status message-specific sinks.

In other words, where the original commit implemented ephemeral status
messages by adding an `isStatus` parameter to most of the logging
methdos in pulumi/pulumi, this implements ephemeral status messages as a
parallel logging sink, which emits _only_ ephemeral status messages.

The original commit message in that PR was:

> Allow log events to be marked "status" events
>
> This commit will introduce a field, IsStatus to LogRequest. A "status"
> logging event will be displayed in the Info column of the main
> display, but will not be printed out at the end, when resource
> operations complete.
>
> For example, for complex resource initialization, we'd like to display
> a series of intermediate results: [1/4] Service object created, for
> example. We'd like these to appear in the Info column, but not at the
> end, where they are not helpful to the user.
2018-08-31 15:56:53 -07:00
Alex Clemmer
9e58fd1aaa Revert "Plumb LogRequest.IsStatus through the logging subsystem"
This reverts commit 3066cbcbd7.
2018-08-31 15:56:53 -07:00
Luke Hoban
b9c64b1e70
Allow skipping refresh step in integration tests (#1852)
Allows working around bugs in refresh (such as https://github.com/pulumi/pulumi-terraform/issues/241).
2018-08-31 11:34:26 -05:00
Alex Clemmer
3066cbcbd7 Plumb LogRequest.IsStatus through the logging subsystem 2018-08-30 17:17:20 -07:00
Justin Van Patten
c29776e561
Support project config keys in templates and -c (#1841)
Previously, we only supported config keys that included a ':' delimiter
in config keys specified in the template manifest and in `-c` flags to
`new` and `up`. This prevented the use of project keys in the template
manifest and made it more difficult to pass such keys with `-c`,
effectively preventing the use of `new pulumi.Config()` in project code.

This change fixes this by allowing config keys that don't have a
delimiter in the template manifest and `-c` flags. In such cases, the
project name is automatically prepended behind the scenes, the same as
what `pulumi config set` does.
2018-08-30 14:56:13 -07:00
Luke Hoban
1ebd698a7a
Support for more ProgramTestOptions in With (#1844)
The pattern we are using here is generally prone to error, so I hope we find a way to move away from this more generally - but for now we need to be able to configure more of these in places we are using `With`.

Also remove some `+""` that are tripping up the linter for me locally.
2018-08-30 11:08:19 -05:00
Pat Gavlin
0634c1852a
Fix some potential bugs in the refresher. (#1845)
- Create all refresh steps before issuing any. This is important as the
  state update loop expects all steps to exist.
- Check for cancellation later in the refresher.

This also fixes races in the SnapshotManager and the test journal that
could cause panics during cancellation.
2018-08-29 21:00:05 -07:00
joeduffy
cd5707f483 Clarify refresh text
The wording for refresh doesn't accurately convey that the operations
aren't actually mutating your resources, but instead are simply changing
your checkpoint state. This change (hopefully) helps in two ways:

First, put text just before the prompt:

Do you want to perform this refresh?
No resources will be modified as part of this refresh; just your stack's state will be.

Second, alter the summary ever-so-slightly, from:

info: 2 changes performed:
    ~ 2 resources updated
      3 resources unchanged

to:

info: 2 changes refreshed:
    ~ 2 resources updated
      3 resources unchanged

This reads just slightly better, and removes any sense of panic I might
have otherwise had that my refresh just did something wrong.

As I was in here, since I had to pass UpdateKind information to new
places, I cleaned up the situation where we had three mostly-similar
enums (but which actually diverged) and several areas where we were
using untyped strings for this same information. Now there's just one.

This fixes pulumi/pulumi#1551.
2018-08-29 17:09:14 -07:00
Pat Gavlin
85db1e6ea9
Add a WriteString method to tools/GenWriter. (#1839)
This method writes a string to the underlying bufio.Writer without
formatting it first.
2018-08-29 14:43:20 -07:00
Alex Clemmer
2baf920c96 Remove unused print statements 2018-08-28 18:00:35 -07:00
Alex Clemmer
2fa98a8dad Generate empty update steps for partial failures
This commit will greatly improve the experience of dealing with partial
failures by simply re-trying to initialize the relevant resources on
every subsequent `pulumi up`, instead of printing a list of reasons the
resource had previously failed to initialize.

As motivation, consider our behavior in the following common, painful
scenario:

  * The user creates a `Service` and a `Deployment`.
  * The `Pod`s in the `Deployment` fail to become live. This causes the
    `Service` to fail, since it does not target any live `Pod`s.
  * The user fixes the `Deployment`. A run of `pulumi up` sees the
    `Pod`s successfully initialize.
  * Users will expect that the `Service` is now in a state of success,
    as the `Pod`s it targets are alive. But, because we don't update the
    `Service` by default, it perpetually exists in a state of error.
  * The user is now required to change some trivial feature of the
    `Service` just to trigger an update, so that we can see it succeed.

There are many situations like this. Another very common one is waiting
for test `Pod`s that are meant to successfully complete when some object
becomes live.

By triggering an empty update step for all resources that have any
initialization errors, we avoid all problems like this.

This commit will implement this empty-update semantics for partial
failures, as well as fix the display UX to correctly render the diff in
these cases.
2018-08-28 18:00:35 -07:00
Sean Gillespie
1624d4a1fe
Remove dead code (#1833)
Large parts of pkg/tokens are not used anymore and can be deleted.
2018-08-28 14:43:41 -07:00
Matt Ellis
8f5def8453 Do not delete failed stacks from integration tests
Often when the test fails, you'll want to use the web console to
investigate the stack, looking at detailed log messages, for
example. But since we always delete the stack today, you often can't.

Stop running `pulumi stack rm` when the test fails, however do run a
`pulumi destroy` so we at least clean up any resources the stack may
have allocated during testing.

Fixes #1722
2018-08-27 13:28:46 -07:00
Pat Gavlin
abfdf69a9c
Indent stack outputs by 1. (#1822)
* Indent stack outputs by 1.

Also:
- Show stack output diffs during preview
- Fix a bug where deletes in stack outputs were not displayed
2018-08-24 15:36:55 -07:00
Pat Gavlin
73f4f2c464
Reimplement refresh. (#1814)
Replace the Source-based implementation of refresh with a phase that
runs as the first part of plan execution and rewrites the snapshot in-memory.

In order to fit neatly within the existing framework for resource operations,
these changes introduce a new kind of step, RefreshStep, to represent
refreshes. RefreshSteps operate similar to ReadSteps but do not imply that
the resource being read is not managed by Pulumi.

In addition to the refresh reimplementation, these changes incorporate those
from #1394 to run refresh in the integration test framework.

Fixes #1598.
Fixes pulumi/pulumi-terraform#165.
Contributes to #1449.
2018-08-22 17:52:46 -07:00
Matt Ellis
ad2d51898c Don't use :config: token when sending values to the service
The fact that we include the `:config:` portion of a configuration
name when sending to the service is an artifact of history. It was
needed back when we needed to support deploying using a new CLI
against a PPC that had older packages embeded in it.

We don't have that sort of problem anymore, so we can stop sending
this data.
2018-08-22 16:41:46 -07:00
Sean Gillespie
3cba431ada
Show a better error message when decrypting fails (#1815)
* Show a better error message when decrypting fails

It is most often the case that failing to decrypt a secret implies that
the secret was transferred from one stack to another via copying the
configuration. This commit introduces a better error message for this
case and instructs users to explicitly re-encrypt their encrypted keys
in the context of the new stack.

* Spelling

* CR: Grammar fixes
2018-08-22 15:32:54 -07:00
Pat Gavlin
91e20289a8
Remove deploy.PlanSummary. (#1809)
Nothing actually uses this information.
2018-08-21 19:33:59 -07:00
Pat Gavlin
734f7beba7
Refactor plan execution in preparation for refresh. (#1801)
These changes simplify a couple aspects of plan execution in the hopes of
clarifying some responsibilities and preparing the code for changes to the
implementation of refresh.

1. All aspects of plan execution are now managed by the plan executor,
   which is no longer exported. Instead, it is abstracted behind
   `Plan.Execute`.
2. The plan executor's error-handling and reporting have been unified
   and simplified somewhat.
2018-08-21 14:05:00 -07:00
Sean Gillespie
d1524e1081
Log errors coming from the language host (#1780)
* Log errors coming from the language host

Similar to pulumi/pulumi#1762, fixes pulumi/pulumi#1775. The language
host can fail without issuing any diagnostics and it is very unclear
what happens if the engine does not log the error.

* CR feedback
2018-08-20 16:41:07 -07:00
Pat Gavlin
effff869a1
Elide unnecessary checkpoint writes. (#1798)
A checkpoint write is unnecessary if it does not change the semantics of
the data currently stored in the checkpoint. We currently perform
unnecessary checkpoint writes in two cases:
- Same steps where no aspect of the resource's state has changed
- Replace steps, which exist solely for display purposes

The former case is particularly bothersome, as it is rather common to
run updates--especially in CI--that consist largely/entirely of these
same steps.

These changes eliminate the checkpoint writes we perform in these two
cases. Some care is needed to ensure that we continue to write the
checkpoint in the case of same steps that do represent meaningful
changes (e.g. changes to a resource's output properties or
dependencies).

Fixes #1769.
2018-08-20 14:14:50 -07:00
Matt Ellis
acf0fb278a Fix wierd interactions due to Cobra and glog
The glog package force the use of golang's underyling flag package,
which Cobra does not use. To work around this, we had a complicated
dance around defining flags in multiple places, calling flag.Parse
explicitly and then stomping values in the flag package with values we
got from Cobra.

Because we ended up parsing parts of the command line twice, each with
a different set of semantics, we ended up with bad UX in some
cases. For example:

`$ pulumi -v=10 --logflow update`

Would fail with an error message that looked nothing like normal CLI
errors, where as:

`$ pulumi -v=10 update --logflow`

Would behave as you expect. To address this, we now do two things:

- We never call flag.Parse() anymore. Wacking the flags with values we
  got from Cobra is sufficent for what we care about.

- We use a forked copy of glog which does not complain when
  flag.Parse() is not called before logging.

Fixes #301
Fixes #710
Fixes #968
2018-08-20 14:08:40 -07:00
Sean Gillespie
347148c374
Don't try to convert a checkpoint's Latest field if nil (#1800)
Not all checkpoints have a Latest field and it is not guaranteed to be
non-nil. Fixes pulumi/pulumi#1788.
2018-08-20 13:47:49 -07:00
CyrusNajmabadi
89d5dd004e
Do not add the same file multiple times to a zip or tar file. (#1783) 2018-08-15 22:44:55 -07:00
Sean Gillespie
3a26ec382a
Add test for pulumi/pulumi#1770 (#1773)
* Add test for pulumi/pulumi#1770

* CR: Add parallel test, do an update before refresh
2018-08-14 15:32:23 -07:00
Sean Gillespie
d83774ca96
Fix two issues that can cause hangs during refresh (#1770)
1. 'readID' was never assigned to and was always the default value,
leading the refresh source to believe a resource was deleted
2. The refresh source could hang when a resource is deleted.
2018-08-13 21:43:10 -07:00
Pat Gavlin
0caba6b990
Elide resource pre events for default providers in preview. (#1767)
Just what it says on the tin.
2018-08-13 15:45:08 -07:00
Sean Gillespie
d9c56eab23
Emit diagnostics for errors coming from step generation (#1766)
The plan executor assumed that the step generator was responsible for
logging its own diagnostics, which it sort-of is but also doesn't log a
majority of the diagnositcs that come out of it. This commit logs all
errors coming out of step generation so that we don't unintentionally
drop errors.
2018-08-13 13:41:01 -07:00
Matt Ellis
e51e159d18 Warn when pulumi is out of date
Before running commands, ask the service for version information about
the CLI and warn the user to upgrade in some cases.

Fixes #1686
2018-08-13 13:18:02 -07:00
CyrusNajmabadi
da616eccca
Print out an archive diff even in the event of resource replacement. (#1760) 2018-08-11 18:33:27 -07:00
Sean Gillespie
491bcdc602
Add a list of in-flight operations to the deployment (#1759)
* Add a list of in-flight operations to the deployment

This commit augments 'DeploymentV2' with a list of operations that are
currently in flight. This information is used by the engine to keep
track of whether or not a particular deployment is in a valid state.

The SnapshotManager is responsible for inserting and removing operations
from the in-flight operation list. When the engine registers an intent
to perform an operation, SnapshotManager inserts an Operation into this
list and saves it to the snapshot. When an operation completes, the
SnapshotManager removes it from the snapshot. From this, the engine can
infer that if it ever sees a deployment with pending operations, the
Pulumi CLI must have crashed or otherwise abnormally terminated before
seeing whether or not an operation completed successfully.

To remedy this state, this commit also adds code to 'pulumi stack
import' that clears all pending operations from a deployment, as well as
code to plan generation that will reject any deployments that have
pending operations present.

At the CLI level, if we see that we are in a state where pending
operations were in-flight when the engine died, we'll issue a
human-friendly error message that indicates which resources are in a bad
state and how to recover their stack.

* CR: Multi-line string literals, renaming in-flight -> pending

* CR: Add enum to apitype for operation type, also name status -> type for clarity

* Fix the yaml type

* Fix missed renames

* Add implementation for lifecycle_test.go

* Rebase against master
2018-08-10 21:39:59 -07:00
Justin Van Patten
9d84f2e249
Initial support for passing URLs to new and up (#1727)
* Initial support for passing URLs to `new` and `up`

This PR adds initial support for `pulumi new` using Git under the covers
to manage Pulumi templates, providing the same experience as before.

You can now also optionally pass a URL to a Git repository, e.g.
`pulumi new [<url>]`, including subdirectories within the repository,
and arbitrary branches, tags, or commits.

The following commands result in the same behavior from the user's
perspective:
 - `pulumi new javascript`
 - `pulumi new https://github.com/pulumi/templates/templates/javascript`
 - `pulumi new https://github.com/pulumi/templates/tree/master/templates/javascript`
 - `pulumi new https://github.com/pulumi/templates/tree/HEAD/templates/javascript`

To specify an arbitrary branch, tag, or commit:
 - `pulumi new https://github.com/pulumi/templates/tree/<branch>/templates/javascript`
 - `pulumi new https://github.com/pulumi/templates/tree/<tag>/templates/javascript`
 - `pulumi new https://github.com/pulumi/templates/tree/<commit>/templates/javascript`

Branches and tags can include '/' separators, and `pulumi` will still
find the right subdirectory.

URLs to Gists are also supported, e.g.:
`pulumi new https://gist.github.com/justinvp/6673959ceb9d2ac5a14c6d536cb871a6`

If the specified subdirectory in the repository does not contain a
`Pulumi.yaml`, it will look for subdirectories within containing
`Pulumi.yaml` files, and prompt the user to choose a template, along the
lines of how `pulumi new` behaves when no template is specified.

The following commands result in the CLI prompting to choose a template:
 - `pulumi new`
 - `pulumi new https://github.com/pulumi/templates/templates`
 - `pulumi new https://github.com/pulumi/templates/tree/master/templates`
 - `pulumi new https://github.com/pulumi/templates/tree/HEAD/templates`

Of course, arbitrary branches, tags, or commits can be specified as well:
 - `pulumi new https://github.com/pulumi/templates/tree/<branch>/templates`
 - `pulumi new https://github.com/pulumi/templates/tree/<tag>/templates`
 - `pulumi new https://github.com/pulumi/templates/tree/<commit>/templates`

This PR also includes initial support for passing URLs to `pulumi up`,
providing a streamlined way to deploy installable cloud applications
with Pulumi, without having to manage source code locally before doing
a deployment.

For example, `pulumi up https://github.com/justinvp/aws` can be used to
deploy a sample AWS app. The stack can be updated with different
versions, e.g.
`pulumi up https://github.com/justinvp/aws/tree/v2 -s <stack-to-update>`

Config values can optionally be passed via command line flags, e.g.
`pulumi up https://github.com/justinvp/aws -c aws:region=us-west-2 -c foo:bar=blah`

Gists can also be used, e.g.
`pulumi up https://gist.github.com/justinvp/62fde0463f243fcb49f5a7222e51bc76`

* Fix panic when hitting ^C from "choose template" prompt

* Add description to templates

When running `pulumi new` without specifying a template, include the template description along with the name in the "choose template" display.

```
$ pulumi new
Please choose a template:
  aws-go                  A minimal AWS Go program
  aws-javascript          A minimal AWS JavaScript program
  aws-python              A minimal AWS Python program
  aws-typescript          A minimal AWS TypeScript program
> go                      A minimal Go program
  hello-aws-javascript    A simple AWS serverless JavaScript program
  javascript              A minimal JavaScript program
  python                  A minimal Python program
  typescript              A minimal TypeScript program
```

* React to changes to the pulumi/templates repo.

We restructured the `pulumi/templates` repo to have all the templates in the root instead of in a `templates` subdirectory, so make the change here to no longer look for templates in `templates`.

This also fixes an issue around using `Depth: 1` that I found while testing this. When a named template is used, we attempt to clone or pull from the `pulumi/templates` repo to `~/.pulumi/templates`. Having it go in this well-known directory allows us to maintain previous behavior around allowing offline use of templates. If we use `Depth: 1` for the initial clone, it will fail when attempting to pull when there are updates to the remote repository. Unfortunately, there's no built-in `--unshallow` support in `go-git` and setting a larger `Depth` doesn't appear to help. There may be a workaround, but for now, if we're cloning the pulumi templates directory to `~/.pulumi/templates`, we won't use `Depth: 1`. For template URLs, we will continue to use `Depth: 1` as we clone those to a temp directory (which gets deleted) that we'll never try to update.

* List available templates in help text

* Address PR Feedback

* Don't show "Installing dependencies" message for `up`

* Fix secrets handling

When prompting for config, if the existing stack value is a secret, keep it a secret and mask the prompt. If the template says it should be secret, make it a secret.

* Fix ${PROJECT} and ${DESCRIPTION} handling for `up`

Templates used with `up` should already have a filled-in project name and description, but if it's a `new`-style template, that has `${PROJECT}` and/or `${DESCRIPTION}`, be helpful and just replace these with better values.

* Fix stack handling

Add a bool `setCurrent` param to `requireStack` to control whether the current stack should be saved in workspace settings. For the `up <url>` case, we don't want to save. Also, split the `up` code into two separate functions: one for the `up <url>` case and another for the normal `up` case where you have workspace in your current directory. While we may be able to combine them back into a single function, right now it's a bit cleaner being separate, even with some small amount of duplication.

* Fix panic due to nil crypter

Lazily get the crypter only if needed inside `promptForConfig`.

* Embellish comment

* Harden isPreconfiguredEmptyStack check

Fix the code to check to make sure the URL specified on the command line matches the URL stored in the `pulumi:template` config value, and that the rest of the config from the stack satisfies the config requirements of the template.
2018-08-10 18:08:16 -07:00
Chris Smith
d640da493e
Don't link to update if operation failed (#1757)
* Don't link to update if operation failed

* Move link printing to lower in the function
2018-08-10 15:57:40 -07:00
Alex Clemmer
a172f1a048 Implement partial Read
Some time ago, we introduced the concept of the initialization error to
Pulumi (i.e., an error where the resource was successfully created but
failed to fully initialize). This was originally implemented in `Create`
and `Update`  methods of the resource provider interface; when we
detected an initialization failure, we'd pack the live version of the
object into the error, and return that to the engine.

Omitted from this initial implementation was a similar semantics for
`Read`. There are many implications of this, but one of them is that a
`pulumi refresh` will erase any initialization errors that had
previously been observed, even if the initialization errors still exist
in the resource.

This commit will introduce the initialization error semantics to `Read`,
fixing this issue.
2018-08-10 15:10:14 -07:00
Pat Gavlin
e8697d872a
Elide events that refer to default providers. (#1739)
The belief is that this hides some complexity that we shouldn't be
exposing in the default case.

In order to filter these events from both the diff/progress display
and the resource change summary, we perform this filtering in
`pkg/engine`.

Fixes #1733.
2018-08-09 14:45:39 -07:00
Sean Gillespie
623e5f1be2
Emit reads for external resources when refreshing (#1749)
* Emit reads for external resources when refreshing

Fixes pulumi/pulumi#1744. This commit educates the refresh source about
external resources. If a refresh source encounters a resource with the
External bit set, it'll send a Read event to the engine and the engine
will process it accordingly.

* CR: save last event channel instead of last event, style fixes
2018-08-09 12:45:39 -07:00
Matt Ellis
80569fb5f8 Rework CI detection logic
Our existing logic was ported from an existing NPM package. However,
our port was incorrect, which is unsurprising given the style of the
source code.

I have rewritten the logic to be more idomatic golang, while keeping
the overall detection logic intact.

Our detection is still based on the presence of environment
variables.

Fixes: #1646
2018-08-08 20:51:25 -07:00
Chris Smith
2d93bb8693
Remove PPC-specific codepaths (#1741) 2018-08-08 19:26:51 -07:00
Thomas Schersach
e998c7554d Added a way to override the template directory used with pulumi new (#1737)
* Added a way to override the template directory used with pulumi new

* Fix typos
2018-08-08 14:25:35 -07:00
Chris Smith
83bdc60f81
Add a few more CI env vars (#1738) 2018-08-08 14:12:47 -07:00
Sean Gillespie
9a5f4044fa
Serialize SourceEvents coming from the refresh source (#1725)
* Serialize SourceEvents coming from the refresh source

The engine requires that a source event coming from a source be "ready
to execute" at the moment that it is sent to the engine. Since the
refresh source sent all goal states eagerly through its source iterator,
the engine assumed that it was legal to execute them all in parallel and
did so. This is a problem for the snapshot, since the snapshot expects
to be in an order that is a legal topological ordering of the dependency
DAG.

This PR fixes the issue by sending refresh source events one-at-a-time
through the refresh source iterator, only unblocking to send the next
step as soon as the previous step completes.

* Fix deadlock in refresh test

* Fix an issue where the engine "completed" steps too early

By signalling that a step is done before committing the step's results
to the snapshot, the engine was left with a race where dependent
resources could find themselves completely executed and committed before
a resource that they depend on has been committed.

Fixes pulumi/pulumi#1726

* Fix an issue with Replace steps at the end of a plan

If the last step that was executed successfully was a Replace, we could
end up in a situation where we unintentionally left the snapshot
invalid.

* Add a test

* CR: pass context.Context as first parameter to Iterate

* CR: null->nil
2018-08-08 13:45:48 -07:00