131 lines
4.1 KiB
Go
131 lines
4.1 KiB
Go
package getproviders
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import (
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"fmt"
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svchost "github.com/hashicorp/terraform-svchost"
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disco "github.com/hashicorp/terraform-svchost/disco"
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"github.com/hashicorp/terraform/addrs"
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)
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// RegistrySource is a Source that knows how to find and install providers from
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// their originating provider registries.
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type RegistrySource struct {
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services *disco.Disco
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}
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// NewRegistrySource creates and returns a new source that will install
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// providers from their originating provider registries.
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func NewRegistrySource(services *disco.Disco) *RegistrySource {
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return &RegistrySource{
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services: services,
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}
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}
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// AvailableVersions returns all of the versions available for the provider
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// with the given address, or an error if that result cannot be determined.
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//
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// If the request fails, the returned error might be an value of
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// ErrHostNoProviders, ErrHostUnreachable, ErrUnauthenticated,
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// ErrProviderNotKnown, or ErrQueryFailed. Callers must be defensive and
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// expect errors of other types too, to allow for future expansion.
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func (s *RegistrySource) AvailableVersions(provider addrs.Provider) (VersionList, error) {
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client, err := s.registryClient(provider.Hostname)
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if err != nil {
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return nil, err
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}
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versionStrs, err := client.ProviderVersions(provider)
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if err != nil {
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return nil, err
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}
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if len(versionStrs) == 0 {
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return nil, nil
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}
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ret := make(VersionList, len(versionStrs))
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for i, str := range versionStrs {
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v, err := ParseVersion(str)
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if err != nil {
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return nil, ErrQueryFailed{
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Provider: provider,
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Wrapped: fmt.Errorf("registry response includes invalid version string %q: %s", str, err),
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}
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}
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ret[i] = v
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}
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ret.Sort() // lowest precedence first, preserving order when equal precedence
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return ret, nil
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}
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// DownloadLocation returns metadata about the location and capabilities of
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// a distribution package for a particular provider at a particular version
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// targeting a particular platform.
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//
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// Callers of DownloadLocation should first call AvailableVersions and pass
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// one of the resulting versions to this function. This function cannot
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// distinguish between a version that is not available and an unsupported
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// target platform, so if it encounters either case it will return an error
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// suggesting that the target platform isn't supported under the assumption
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// that the caller already checked that the version is available at all.
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//
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// To find a package suitable for the platform where the provider installation
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// process is running, set the "target" argument to
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// findproviders.CurrentPlatform.
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//
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// If the request fails, the returned error might be an value of
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// ErrHostNoProviders, ErrHostUnreachable, ErrUnauthenticated,
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// ErrPlatformNotSupported, or ErrQueryFailed. Callers must be defensive and
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// expect errors of other types too, to allow for future expansion.
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func (s *RegistrySource) DownloadLocation(provider addrs.Provider, version Version, target Platform) (PackageMeta, error) {
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client, err := s.registryClient(provider.Hostname)
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if err != nil {
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return PackageMeta{}, err
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}
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return client.PackageMeta(provider, version, target)
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}
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func (s *RegistrySource) registryClient(hostname svchost.Hostname) (*registryClient, error) {
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host, err := s.services.Discover(hostname)
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if err != nil {
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return nil, ErrHostUnreachable{
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Hostname: hostname,
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Wrapped: err,
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}
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}
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url, err := host.ServiceURL("providers.v1")
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switch err := err.(type) {
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case nil:
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// okay! We'll fall through and return below.
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case *disco.ErrServiceNotProvided:
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return nil, ErrHostNoProviders{
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Hostname: hostname,
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}
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case *disco.ErrVersionNotSupported:
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return nil, ErrHostNoProviders{
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Hostname: hostname,
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HasOtherVersion: true,
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}
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default:
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return nil, ErrHostUnreachable{
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Hostname: hostname,
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Wrapped: err,
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}
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}
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// Check if we have credentials configured for this hostname.
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creds, err := s.services.CredentialsForHost(hostname)
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if err != nil {
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// This indicates that a credentials helper failed, which means we
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// can't do anything better than just pass through the helper's
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// own error message.
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return nil, fmt.Errorf("failed to retrieve credentials for %s: %s", hostname, err)
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}
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return newRegistryClient(url, creds), nil
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}
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