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47e657c611
* internal/getproviders: decode and return any registry warnings The public registry may include a list of warnings in the "versions" response for any given provider. This PR adds support for warnings from the registry and an installer event to return those warnings to the user.
103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
package getproviders
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import (
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"sync"
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"github.com/hashicorp/terraform/addrs"
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)
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// MemoizeSource is a Source that wraps another Source and remembers its
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// results so that they can be returned more quickly on future calls to the
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// same object.
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//
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// Each MemoizeSource maintains a cache of response it has seen as part of its
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// body. All responses are retained for the remaining lifetime of the object.
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// Errors from the underlying source are also cached, and so subsequent calls
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// with the same arguments will always produce the same errors.
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//
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// A MemoizeSource can be called concurrently, with incoming requests processed
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// sequentially.
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type MemoizeSource struct {
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underlying Source
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availableVersions map[addrs.Provider]memoizeAvailableVersionsRet
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packageMetas map[memoizePackageMetaCall]memoizePackageMetaRet
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mu sync.Mutex
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}
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type memoizeAvailableVersionsRet struct {
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VersionList VersionList
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Warnings Warnings
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Err error
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}
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type memoizePackageMetaCall struct {
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Provider addrs.Provider
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Version Version
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Target Platform
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}
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type memoizePackageMetaRet struct {
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PackageMeta PackageMeta
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Err error
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}
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var _ Source = (*MemoizeSource)(nil)
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// NewMemoizeSource constructs and returns a new MemoizeSource that wraps
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// the given underlying source and memoizes its results.
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func NewMemoizeSource(underlying Source) *MemoizeSource {
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return &MemoizeSource{
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underlying: underlying,
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availableVersions: make(map[addrs.Provider]memoizeAvailableVersionsRet),
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packageMetas: make(map[memoizePackageMetaCall]memoizePackageMetaRet),
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}
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}
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// AvailableVersions requests the available versions from the underlying source
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// and caches them before returning them, or on subsequent calls returns the
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// result directly from the cache.
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func (s *MemoizeSource) AvailableVersions(provider addrs.Provider) (VersionList, Warnings, error) {
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s.mu.Lock()
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defer s.mu.Unlock()
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if existing, exists := s.availableVersions[provider]; exists {
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return existing.VersionList, nil, existing.Err
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}
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ret, warnings, err := s.underlying.AvailableVersions(provider)
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s.availableVersions[provider] = memoizeAvailableVersionsRet{
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VersionList: ret,
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Err: err,
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Warnings: warnings,
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}
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return ret, warnings, err
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}
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// PackageMeta requests package metadata from the underlying source and caches
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// the result before returning it, or on subsequent calls returns the result
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// directly from the cache.
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func (s *MemoizeSource) PackageMeta(provider addrs.Provider, version Version, target Platform) (PackageMeta, error) {
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s.mu.Lock()
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defer s.mu.Unlock()
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key := memoizePackageMetaCall{
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Provider: provider,
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Version: version,
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Target: target,
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}
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if existing, exists := s.packageMetas[key]; exists {
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return existing.PackageMeta, existing.Err
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}
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ret, err := s.underlying.PackageMeta(provider, version, target)
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s.packageMetas[key] = memoizePackageMetaRet{
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PackageMeta: ret,
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Err: err,
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}
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return ret, err
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}
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func (s *MemoizeSource) ForDisplay(provider addrs.Provider) string {
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return s.underlying.ForDisplay(provider)
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}
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