Merge pull request #2 from hashicorp/paddy_bootstrap

Rough out the basic types

Author: Paddy

.circleci/config.yml

@@ -0,0 +1,90 @@
+version: 2.1
+
+commands:
+  get_dependencies:
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - go-mod-v1-{{ checksum "go.sum" }}
+      - run: go get -v -d ./...
+      - save_cache:
+          key: go-mod-v1-{{ checksum "go.sum" }}
+          paths:
+            - "/go/pkg/mod"
+  get_golangci_lint:
+    steps:
+      - run:
+          command: |
+            curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s v1.31.0
+      - save_cache:
+          key: golangci-lint-v1-31-0-{{ checksum "bin/golangci-lint" }}
+          paths:
+            - "bin/"
+
+jobs:
+  "docker-go114 build":
+    docker:
+      - image: circleci/golang:1.14
+    steps:
+      - get_dependencies
+      - run: go build ./...
+  "docker-go114 test":
+    docker:
+      - image: circleci/golang:1.14
+        environment:
+          TF_ACC_TERRAFORM_VERSION: "0.12.26"
+    parameters:
+      test_results:
+        type: string
+        default: /tmp/test-results
+    steps:
+      - get_dependencies
+      - run: mkdir -p << parameters.test_results >>/report
+      - run:
+          command: |
+            gotestsum --junitfile << parameters.test_results >>/report/gotestsum-report.xml -- -coverprofile=cover.out ./...
+            go tool cover -html=cover.out -o coverage.html
+            mv coverage.html << parameters.test_results >>
+      - store_artifacts:
+          path: << parameters.test_results >>
+          destination: raw-test-output
+      - store_test_results:
+          path: << parameters.test_results >>
+  "docker-go114 vet":
+    docker:
+      - image: circleci/golang:1.14
+    steps:
+      - get_dependencies
+      - run: go vet ./...
+  "docker-go114 gofmt":
+    docker:
+      - image: circleci/golang:1.14
+    steps:
+      - get_dependencies
+      - run: ./scripts/gofmtcheck.sh
+  "docker-go114 golangci-lint":
+    docker:
+      - image: circleci/golang:1.14
+    steps:
+      - get_dependencies
+      - get_golangci_lint
+      - run: bin/golangci-lint run -v ./...
+
+workflows:
+  version: 2
+  pr:
+    jobs:
+      - "docker-go114 build"
+      - "docker-go114 test":
+          requires:
+            - "docker-go114 build"
+      - "docker-go114 vet":
+          requires:
+            - "docker-go114 build"
+      - "docker-go114 gofmt":
+          requires:
+            - "docker-go114 build"
+      - "docker-go114 golangci-lint":
+          requires:
+            - "docker-go114 build"

go.mod

@@ -0,0 +1,15 @@
+module github.com/hashicorp/terraform-plugin-go
+
+go 1.14
+
+require (
+	github.com/golang/protobuf v1.4.2
+	github.com/hashicorp/go-plugin v1.3.0
+	github.com/kr/pretty v0.1.0 // indirect
+	github.com/vmihailenco/msgpack v4.0.4+incompatible
+	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect
+	google.golang.org/appengine v1.6.5 // indirect
+	google.golang.org/grpc v1.32.0
+	google.golang.org/protobuf v1.23.0
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
+)

go.sum

@@ -0,0 +1,113 @@
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+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.23.0 h1:4MY060fB1DLGMB/7MBTLnwQUY6+F09GEiz6SsrNqyzM=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

scripts/gofmtcheck.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+set -e
+
+echo "==> Checking that code complies with gofmt requirements..."
+gofmt_files=$(gofmt -s -l `find . -name '*.go'`)
+if [[ -n ${gofmt_files} ]]; then
+    echo 'gofmt needs running on the following files:'
+    echo "${gofmt_files}"
+    echo "You can use the command: \`make fmt\` to reformat code."
+    exit 1
+fi
+
+exit 0

tfprotov5/attribute_path.go

@@ -0,0 +1,115 @@
+package tfprotov5
+
+import (
+	"errors"
+)
+
+var (
+	ErrNotAttributePathStepper = errors.New("doesn't fill tfprotov5.AttributePathStepper interface")
+	ErrInvalidStep             = errors.New("step cannot be applied to this value")
+)
+
+type AttributePath struct {
+	Steps []AttributePathStep
+}
+
+type AttributePathStep interface {
+	unfulfillable() // make this interface fillable only by this package
+}
+
+var (
+	_ AttributePathStep = AttributeName("")
+	_ AttributePathStep = ElementKeyString("")
+	_ AttributePathStep = ElementKeyInt(0)
+)
+
+type AttributeName string
+
+func (a AttributeName) unfulfillable() {}
+
+type ElementKeyString string
+
+func (e ElementKeyString) unfulfillable() {}
+
+type ElementKeyInt int64
+
+func (e ElementKeyInt) unfulfillable() {}
+
+type AttributePathStepper interface {
+	// Return the attribute or element the AttributePathStep is referring
+	// to, or an error if the AttributePathStep is referring to an
+	// attribute or element that doesn't exist.
+	ApplyTerraform5AttributePathStep(AttributePathStep) (interface{}, error)
+}
+
+func WalkAttributePath(in interface{}, path AttributePath) (interface{}, AttributePath, error) {
+	if len(path.Steps) < 1 {
+		return in, path, nil
+	}
+	stepper, ok := in.(AttributePathStepper)
+	if !ok {
+		stepper, ok = builtinAttributePathStepper(in)
+		if !ok {
+			return in, path, ErrNotAttributePathStepper
+		}
+	}
+	next, err := stepper.ApplyTerraform5AttributePathStep(path.Steps[0])
+	if err != nil {
+		return in, path, err
+	}
+	path.Steps = path.Steps[1:]
+	return WalkAttributePath(next, path)
+}
+
+func builtinAttributePathStepper(in interface{}) (AttributePathStepper, bool) {
+	switch v := in.(type) {
+	case map[string]interface{}:
+		return mapStringInterfaceAttributePathStepper(v), true
+	case []interface{}:
+		return interfaceSliceAttributePathStepper(v), true
+	default:
+		return nil, false
+	}
+}
+
+type mapStringInterfaceAttributePathStepper map[string]interface{}
+
+func (m mapStringInterfaceAttributePathStepper) ApplyTerraform5AttributePathStep(step AttributePathStep) (interface{}, error) {
+	_, isAttributeName := step.(AttributeName)
+	_, isElementKeyString := step.(ElementKeyString)
+	if !isAttributeName && !isElementKeyString {
+		return nil, ErrInvalidStep
+	}
+	var stepValue string
+	if isAttributeName {
+		stepValue = string(step.(AttributeName))
+	}
+	if isElementKeyString {
+		stepValue = string(step.(ElementKeyString))
+	}
+	v, ok := m[stepValue]
+	if !ok {
+		return nil, ErrInvalidStep
+	}
+	return v, nil
+}
+
+type interfaceSliceAttributePathStepper []interface{}
+
+func (i interfaceSliceAttributePathStepper) ApplyTerraform5AttributePathStep(step AttributePathStep) (interface{}, error) {
+	eki, isElementKeyInt := step.(ElementKeyInt)
+	if !isElementKeyInt {
+		return nil, ErrInvalidStep
+	}
+	// slices can only have items up to the max value of int
+	// but we get ElementKeyInt as an int64
+	// we keep ElementKeyInt as an int64 and cast the length of the slice
+	// to int64 here because if ElementKeyInt is greater than the max value
+	// of int, we will always (correctly) error out here. This lets us
+	// confidently cast ElementKeyInt to an int below, knowing we're not
+	// truncating data
+	if int64(eki) >= int64(len(i)) {
+		return nil, ErrInvalidStep
+	}
+	return i[int(eki)], nil
+}

tfprotov5/data_source.go

@@ -0,0 +1,30 @@
+package tfprotov5
+
+import (
+	"context"
+)
+
+type DataSourceServer interface {
+	ValidateDataSourceConfig(context.Context, *ValidateDataSourceConfigRequest) (*ValidateDataSourceConfigResponse, error)
+	ReadDataSource(context.Context, *ReadDataSourceRequest) (*ReadDataSourceResponse, error)
+}
+
+type ValidateDataSourceConfigRequest struct {
+	TypeName string
+	Config   *DynamicValue
+}
+
+type ValidateDataSourceConfigResponse struct {
+	Diagnostics []*Diagnostic
+}
+
+type ReadDataSourceRequest struct {
+	TypeName     string
+	Config       *DynamicValue
+	ProviderMeta *DynamicValue
+}
+
+type ReadDataSourceResponse struct {
+	State       *DynamicValue
+	Diagnostics []*Diagnostic
+}