This change gets enough of the Python SDK up and running that the
empty Python program will work. Mostly just scaffolding, but the
basic structure is now in place. The primary remaining work is to
wire up resource creation to the gRPC interfaces.
In summary:
* The basic structure is as follows:
- Everything goes into sdk/python/.
- sdk/python/cmd/pulumi-langhost-python is a Go language host
that simply knows how to spawn Python processes to run out
entrypoint in response to requests by the engine.
- sdk/python/cmd/pulumi-langhost-python-exec is a little Python
shim that is invoked by the language host to run Python programs,
and is responsible for setting up the minimal goo before we can
do so (RPC connections and the like).
- sdk/python/lib/ contains a Python Pip package suitable for PyPi.
- In there, we have two packages: the root pulumi package that
contains all of the basic Pulumi programming model abstractions,
and pulumi.runtime, which contains the implementation of
resource registration, RPC interfacing with the engine, and so on.
* Add logic in our test framework to conditionalize on the language
type and react accordingly. This will allow us to skip Yarn for
Python projects and eventually run Pip if there's a requirements.txt.
* Created the basic project structure, including all of the usual
Make targets for installing into the proper places.
* Building also runs Pylint and we are clean.
There are a few other minor things in here:
* Add an "empty" test for both Node.js and Python. These pass.
* Fix an existing bug in plugin shutdown logic. At some point, we
started waiting for stderr/stdout to flush before shutting down
the plugin; but if certain failures happen "early" during the
plugin launch process, these channels will never get initialized
and so waiting for them deadlocks.
* Recently we seem to have added logic to delete test temp
directories if a failure happened during initialization of said
temp directories. This is unfortunate, because you often need to
look at the temp directory to see what failed. We already clean
them up elsewhere after the full test completes successfully, so
I don't think we need to be doing this, and I've removed it.
Still many loose ends (config, resources, etc), but it's a start!
This change adds a basic Python langhost RPC server. It's fairly
barebones and merely acts as a jumping off point for the Pulumi engine
to spawn a Python program. The host is written in Go, in contrast to
implementing the host in Python, and more closely resembles how I
expect the Node.js language host to work once pulumi/pulumi#331 is done.
1. Various idiomatic Go and TypeScript fixes
2. Add an integration test that end-to-end roundtrips dependency
information for a simple Pulumi program
3. Add an additional test assert that tests that dependency information
comes from the language host as expected
This commit does two things:
1. All dependencies of a resource, both implicit and explicit, are
communicated directly to the engine when registering a resource. The
engine keeps track of these dependencies and ultimately serializes
them out to the checkpoint file upon successful deployment.
2. Once a successful deployment is done, the new `pulumi stack
graph` command reads the checkpoint file and outputs the dependency
information within in the DOT format.
Keeping track of dependency information within the checkpoint file is
desirable for a number of reasons, most notably delete-before-create,
where we want to delete resources before we have created their
replacement when performing an update.
This change refactors the way we do ${VERSION} substitution in both
the Node.js SDK's version.js and package.json, so that it can work on
Windows. This is required now that we are actually parsing semvers.
On Windows, when we launch the language host, it will end up with
a ".exe" file extension at the end of os.Args[0]. This leads us to
produce a garbage filename for the -exec script -- namely,
pulumi-language-nodejs.exe-exec -- which, of course fails. We simply
need to trim off the ".exe" bit before producing the script name.
We have had a long-standing bug in here where we waiting on a
stdout channel that never got populated, when the language plugin
fails to load entirely. This would lead to hung processes. The
fix is simple: only wait for stdout/stderr channels to drain that
have actually been wired up to enjoy the requisite signaling.
This adds support for two things:
* Installing all plugins that a project requires with a single command:
$ pulumi plugin install
* Listing the plugins that this project requires:
$ pulumi plugin ls --project
$ pulumi plugin ls -p
This brings back the Node.js language plugin's GetRequiredPlugins
function, reimplemented in Go now that the language host has been
rewritten from JavaScript. Fairly rote translation, along with
some random fixes required to get tests passing again.
This change implements the Node.js language host's GetRequiredPlugins
function. This merely scans all node_modules/*/package.json files in
the program directory, looking for those that have associated plugins.
It returns a list of any found along with their version numbers.
This change adds a GetRequiredPlugins RPC method to the language
host, enabling us to query it for its list of plugin requirements.
This is language-specific because it requires looking at the set
of dependencies (e.g., package.json files).
It also adds a call up front during any update/preview operation
to compute the set of plugins and require that they are present.
These plugins are populated in the cache and will be used for all
subsequent plugin-related operations during the engine's activity.
We now cache the language plugins, so that we may load them
eagerly too, which we never did previously due to the fact that
we needed to pass the monitor address at load time. This was a
bit bizarre anyhow, since it's really the Run RPC function that
needs this information. So, to enable caching and eager loading
-- which we need in order to invoke GetRequiredPlugins -- the
"phone home" monitor RPC address is passed at Run time.
In a subsequent change, we will switch to faulting in the plugins
that are missing -- rather than erroring -- in addition to
supporting the `pulumi plugin install` CLI command.
This change introduces a workspace.GetPluginPath function that probes
the central workspace cache of plugins for a matching plugin binary that
matches the desired kind, name, and, optionally, version. It also permits
overriding this with $PATH for developer scenarios.
The analyzer, language, and resource plugin logic now uses this function
for deciding which binary path to load at runtime.
Fixes#356. Instead of downloading a node binary with our closure
serialization code linked-in, this PR instead publishes the
`nativeruntime.node` produced by the NodeJS SDK build as part of the SDK.
This has a number of advantages. First, it is vastly more easy to
develop closure.cc in this configuration. Second, we have the ability
to ship different `nativeruntime.node`s side-by-side, paving the way
for enabling future versions of Node. Third, we don't have to stay
in the business of shipping custom builds of Node, although we do still
need to ship a version of Node with minor modifications in order for
Windows to still work.
The windows build was still on the old plan from way back when where
we had binaries littered in the build tree and you had to add parts of
your build-tree to the `%PATH%` for the integration tests to work.
This cleans that up and moves all of our scripts that invoke
javascript to be on the same plan. They invoke our specially named
node with a relative path to the JS code we want to run.
We no longer have a node_modules folder in the SDK (since all
packages now come from NPM) so we need to adjust the shell script we
use to launch our runner to use a relative path.
This improves the failure messages in two circumstances:
1) If the resource monitor RPC connection is missing. This can happen
two ways: either you run a Pulumi program using vanilla Node.js, instead
of the CLI, or you've accidentally loaded the Pulumi SDK more than once.
2) Failure to load the custom Pulumi SDK Node.js extension. This is a new
addition and would happen if you tried running a Pulumi program using a
vanilla Node.js, rather than using the Pulumi CLI.
In order to begin publishing our core SDK package to NPM, we will
need it to be underneath the @pulumi scope so that it may remain
private. Eventually, we can alias pulumi back to it.
This is part of pulumi/pulumi#915.
* experimental: separate language host from node
* Remove langhost details from the NodeJS SDK runtime
* Cleanup
* Work around an issue where Node sometimes loads the same module twice in two different contexts, resulting in two distinct module objects. Some additional cleanup.
* Add some tests
* Fix up the Windows script
* Fix up the install scripts and Windows build
* Code review feedback
* Code review feedback: error capitalization
As it stands, we serialize more than is correct when registering
resources: in addition to serializing the RegisterResource RPC, we also
wait for input properties to resolve in the same context. Unfortunately,
this means that we can create cycles in the promise graph when a
resource A is constructed in an earlier turn than some resource B and
one of B's output properties is an input to resource A. These changes
fix this issue by allowing input properties to resolve *before*
serializing the RegisterResource RPC.
Some integration tests had taken a dependency on the ordering of resources in
either the output of the `pulumi` command or the checkpoint file. The
only test that took a dependency on command output was updated s.t. its
resources have exactly one legal topographical sort (and therefore their
ordering is deterministic). The other tests were updated s.t. their
validation did not depend on resource ordering.
Our scripts currently copy the package.json that does *not* have
the expanded semver, so its version is simply "${VERSION}", and NPM
is very much not happy with that. We can just stop copying the
package.json explicitly since it's inside of the bin/ directory.
It was possiblef for the finally for a stack to complete before all
other resources had been created. In this case, we would put these new
resources at top level, instead of having them as children of the
stack resource.
Since we do not use the langhost across stacks, we can simply set the
stack resource at top level and never remove it.
Fixes#818
