问为什么terraform要从Hashicorp中提取一个提供者？

EN

christianb@unifi terraform-provider-artifactory % rm -fR .terraform                                                               
christianb@unifi terraform-provider-artifactory % go build && mkdir -p .terraform/plugins/registry.terraform.io/jfrog/artifactory/2.2.6-alpha/darwin_amd64 && mv terraform-provider-artifactory .terraform/plugins/registry.terraform.io/jfrog/artifactory/2.2.6-alpha/darwin_amd64

christianb@unifi terraform-provider-artifactory % TF_LOG=trace terraform init
2021/02/25 13:12:56 [INFO] Terraform version: 0.13.5  
2021/02/25 13:12:56 [INFO] Go runtime version: go1.14.10
2021/02/25 13:12:56 [INFO] CLI args: []string{"/usr/local/bin/terraform", "init"}
2021/02/25 13:12:56 [DEBUG] Attempting to open CLI config file: /Users/christianb/.terraformrc
2021/02/25 13:12:56 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2021/02/25 13:12:56 [DEBUG] ignoring non-existing provider search directory terraform.d/plugins
2021/02/25 13:12:56 [DEBUG] ignoring non-existing provider search directory /Users/christianb/.terraform.d/plugins
2021/02/25 13:12:56 [DEBUG] ignoring non-existing provider search directory /Users/christianb/Library/Application Support/io.terraform/plugins
2021/02/25 13:12:56 [DEBUG] ignoring non-existing provider search directory /Library/Application Support/io.terraform/plugins
2021/02/25 13:12:56 [INFO] CLI command args: []string{"init"}

Initializing the backend...
2021/02/25 13:12:56 [TRACE] Meta.Backend: no config given or present on disk, so returning nil config
2021/02/25 13:12:56 [TRACE] Meta.Backend: backend has not previously been initialized in this working directory
2021/02/25 13:12:56 [DEBUG] New state was assigned lineage "b7f7e5b9-b88c-6195-aaaf-e38b3008b8e5"
2021/02/25 13:12:56 [TRACE] Meta.Backend: using default local state only (no backend configuration, and no existing initialized backend)
2021/02/25 13:12:56 [TRACE] Meta.Backend: instantiated backend of type <nil>
2021/02/25 13:12:56 [DEBUG] checking for provisioner in "."
2021/02/25 13:12:56 [DEBUG] checking for provisioner in "/usr/local/bin"
2021/02/25 13:12:56 [INFO] Failed to read plugin lock file .terraform/plugins/darwin_amd64/lock.json: open .terraform/plugins/darwin_amd64/lock.json: no such file or directory
2021/02/25 13:12:56 [TRACE] Meta.Backend: backend <nil> does not support operations, so wrapping it in a local backend
2021/02/25 13:12:56 [TRACE] backend/local: state manager for workspace "default" will:
 - read initial snapshot from terraform.tfstate
 - write new snapshots to terraform.tfstate
 - create any backup at terraform.tfstate.backup
2021/02/25 13:12:56 [TRACE] statemgr.Filesystem: reading initial snapshot from terraform.tfstate
2021/02/25 13:12:56 [TRACE] statemgr.Filesystem: snapshot file has nil snapshot, but that's okay
2021/02/25 13:12:56 [TRACE] statemgr.Filesystem: read nil snapshot

2021/02/25 13:12:56 [TRACE] providercache.fillMetaCache: scanning directory .terraform/plugins
2021/02/25 13:12:56 [TRACE] getproviders.SearchLocalDirectory: .terraform/plugins is a symlink to .terraform/plugins
Initializing provider plugins...
2021/02/25 13:12:56 [TRACE] getproviders.SearchLocalDirectory: found registry.terraform.io/jfrog/artifactory v2.2.6-alpha for darwin_amd64 at .terraform/plugins/registry.terraform.io/jfrog/artifactory/2.2.6-alpha/darwin_amd64
2021/02/25 13:12:56 [TRACE] providercache.fillMetaCache: including .terraform/plugins/registry.terraform.io/jfrog/artifactory/2.2.6-alpha/darwin_amd64 as a candidate package for registry.terraform.io/jfrog/artifactory 2.2.6-alpha
2021/02/25 13:12:56 [DEBUG] Service discovery for registry.terraform.io at https://registry.terraform.io/.well-known/terraform.json
2021/02/25 13:12:56 [TRACE] HTTP client GET request to https://registry.terraform.io/.well-known/terraform.json
- Using previously-installed jfrog/artifactory v2.2.6-alpha
- Finding latest version of hashicorp/xray...
2021/02/25 13:12:56 [DEBUG] GET https://registry.terraform.io/v1/providers/hashicorp/xray/versions
2021/02/25 13:12:56 [TRACE] HTTP client GET request to https://registry.terraform.io/v1/providers/hashicorp/xray/versions
2021/02/25 13:12:57 [TRACE] providercache.fillMetaCache: using cached result from previous scan of .terraform/plugins
2021/02/25 13:12:57 [DEBUG] GET https://registry.terraform.io/v1/providers/-/xray/versions
2021/02/25 13:12:57 [TRACE] HTTP client GET request to https://registry.terraform.io/v1/providers/-/xray/versions

Error: Failed to install provider

Error while installing hashicorp/xray: provider registry registry.terraform.io
does not have a provider named registry.terraform.io/hashicorp/xray

# Required for Terraform 0.13 and up (https://www.terraform.io/upgrade-guides/0-13.html)
terraform {
  required_providers {
    artifactory = {
      source  = "registry.terraform.io/jfrog/artifactory"
      version = "2.2.6-alpha"
    }
  }
}
provider "artifactory" {
  url = "http://localhost:8082/artifactory"
  username = "admin"
  password = "password"
}

resource "xray_policy" "test" {
  name  = "test-policy-name"
  description = "test policy description"
  type = "security"

  rules {
    name = "rule-name"
    priority = 1
    criteria {
      min_severity = "High"
    }
    actions {
      block_download {
        unscanned = true
        active = true
      }
    }
  }
}

resource "xray_watch" "test" {
  name = "test-watch-name"
  description = "test watch description"
  resources {
    type = "all-repos"
    name = "All Repositories"
  }
  assigned_policies {
    name = xray_policy.test.name
    type = "security"
  }
  watch_recipients = ["test@example.com"]
}