feat(providers): pulumi project/stack set via env var (#342)

Signed-off-by: Andrew Gershman <andrew@cndr.io>

README.md

@@ -717,14 +717,16 @@ Obtain value in state pulled from Pulumi Cloud REST API:
 * `RESOURCE_LOGICAL_NAME` is the [logical name](https://www.pulumi.com/docs/concepts/resources/names/#logicalname) of the resource in the Pulumi program.
 * `ATTRIBUTE_TYPE` is either `outputs` or `inputs`.
 * `ATTRIBUTE_KEY_PATH` is a [GJSON](https://github.com/tidwall/gjson/blob/master/SYNTAX.md) expression that selects the desired attribute from the resource's inputs or outputs per the chosen `ATTRIBUTE_TYPE` value. You must encode any characters that would otherwise not comply with URI syntax, for example `#` becomes `%23`.
-* `project` is the Pulumi project name.
-* `stack` is the Pulumi stack name.
+* `project` is the Pulumi project name. May also be provided via the `PULUMI_PROJECT` environment variable.
+* `stack` is the Pulumi stack name. May also be provided via the `PULUMI_STACK` environment variable.
 
 Environment variables:
 
 - `PULUMI_API_ENDPOINT_URL` is the Pulumi API endpoint URL. Defaults to `https://api.pulumi.com`. You may also provide this as the `pulumi_api_endpoint_url` query parameter.
 - `PULUMI_ACCESS_TOKEN` is the Pulumi access token to use for authentication.
 - `PULUMI_ORGANIZATION` is the Pulumi organization to use for authentication. You may also provide this as an `organization` query parameter.
+- `PULUMI_PROJECT` is the Pulumi project. You may also provide this as a `project` query parameter.
+- `PULUMI_STACK` is the Pulumi stack. You may also provide this as a `stack` query parameter.
 
 Examples:
 

pkg/providers/pulumi/pulumi.go

@@ -88,8 +88,17 @@ func New(l *log.Logger, cfg api.StaticConfig, backend string) *provider {
 		p.organization = os.Getenv("PULUMI_ORGANIZATION")
 	}
 
-	p.project = cfg.String("project")
-	p.stack = cfg.String("stack")
+	if cfg.Exists("project") {
+		p.project = cfg.String("project")
+	} else {
+		p.project = os.Getenv("PULUMI_PROJECT")
+	}
+
+	if cfg.Exists("stack") {
+		p.stack = cfg.String("stack")
+	} else {
+		p.stack = os.Getenv("PULUMI_STACK")
+	}
 
 	p.log.Debugf("pulumi: backend=%q, api_endpoint=%q, organization=%q, project=%q, stack=%q",
 		p.backend, p.pulumiAPIEndpointURL, p.organization, p.project, p.stack)