087deb7643
This change adds an optiona dependsOn parameter to Resource constructors, to "force" a fake dependency between resources. We have an extremely strong desire to resort to using this only in unusual cases -- and instead rely on the natural dependency DAG based on properties -- but experience in other resource provisioning frameworks tells us that we're likely to need this in the general case. Indeed, we've already encountered the need in AWS's API Gateway resources... and I suspect we'll run into more especially as we tackle non-serverless resources like EC2 Instances, where "ambient" dependencies are far more commonplace. This also makes parallelism the default mode of operation, and we have a new --serialize flag that can be used to suppress this default behavior. Full disclosure: I expect this to become more Make-like, i.e. -j 8, where you can specify the precise width of parallelism, when we tackle pulumi/pulumi-fabric#106. I also think there's a good chance we will flip the default, so that serial execution is the default, so that developers who don't benefit from the parallelism don't need to worry about dependsOn in awkward ways. This tends to be the way most tools (like Make) operate. This fixes pulumi/pulumi-fabric#335.
30 lines
1.5 KiB
Go
30 lines
1.5 KiB
Go
// Copyright 2016-2017, Pulumi Corporation. All rights reserved.
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package plugin
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import (
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"io"
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"github.com/pulumi/pulumi-fabric/pkg/tokens"
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)
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// LanguageRuntime is a convenient interface for interacting with language runtime plugins. These tend to be
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// dynamically loaded as plugins, although this interface hides this fact from the calling code.
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type LanguageRuntime interface {
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// Closer closes any underlying OS resources associated with this plugin (like processes, RPC channels, etc).
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io.Closer
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// Run executes a program in the language runtime for planning or deployment purposes. If info.DryRun is true,
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// the code must not assume that side-effects or final values resulting from resource deployments are actually
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// available. If it is false, on the other hand, a real deployment is occurring and it may safely depend on these.
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Run(info RunInfo) (string, error)
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}
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// RunInfo contains all of the information required to perform a plan or deployment operation.
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type RunInfo struct {
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Pwd string // the program's working directory.
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Program string // the path to the program to execute.
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Args []string // any arguments to pass to the program.
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Config map[tokens.ModuleMember]string // the configuration variables to apply before running.
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DryRun bool // true if we are performing a dry-run (plan).
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Serialize bool // true to serialize resource operations (the default is false).
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}
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