f848090479
As documented in issue #616, the inputs/defaults/outputs model we have today has fundamental problems. The crux of the issue is that our current design requires that defaults present in the old state of a resource are applied to the new inputs for that resource. Unfortunately, it is not possible for the engine to decide which defaults remain applicable and which do not; only the provider has that knowledge. These changes take a more tactical approach to resolving this issue than that originally proposed in #616 that avoids breaking compatibility with existing checkpoints. Rather than treating the Pulumi inputs as the provider input properties for a resource, these inputs are first translated by `Check`. In order to accommodate provider defaults that were chosen for the old resource but should not change for the new, `Check` now takes the old provider inputs as well as the new Pulumi inputs. Rather than the Pulumi inputs and provider defaults, the provider inputs returned by `Check` are recorded in the checkpoint file. Put simply, these changes remove defaults as a first-class concept (except inasmuch as is required to retain the ability to read old checkpoint files) and move the responsibilty for manging and merging defaults into the provider that supplies them. Fixes #616. |
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Pulumi Fabric Node.js SDK
The Pulumi Fabric Node.js SDK lets you write cloud programs in JavaScript.
Installing
For now, we only support developers building from source. Eventually we will have a nice installer.
Prerequisites
To build and install the SDK, you will first need a few things.
First, install Node.js 6.10.2. We recommend nvm, since it makes it easier
to switch between versions of Node.js. Afterwards, run nvm install 6.10.2.
Next, we suggest using Yarn for package management. NPM works too, but Yarn is faster and therefore preferred. Please follow the directions on Yarn's website.
Building and Testing
The first time you build, you must make configure to install and prepare native plugins for V8:
$ make configure
Make sure to run this after installing the right version of Node.js above, otherwise it may bind to the wrong version.
To build the SDK, simply run make from the root directory (sdk/nodejs/). This will build the code, run tests, and
then "install" the package (by yarn linking the resulting bin/ directory).
We recommend putting bin/ on your $PATH, since the pulumi-langhost-nodejs executable will be loaded dynamically
by the pulumi tool whenever it encounters a Node.js program.
The tests will verify that everything works, but feel free to try running pulumi preview and/or pulumi update from
the examples/minimal/ directory. Remember to run tsc first, since pulumi expects JavaScript, not TypeScript.