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storage_fs.go
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/
storage_fs.go
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package main
import (
"encoding/json"
"fmt"
"os"
"path/filepath"
"strings"
"golang.org/x/mod/sumdb/dirhash"
)
// for filesystem mirroring we use the Terraform mirror index and the individual JSON files as the catalog
func (s FSProviderStorageConfiguration) LoadCatalog() ([]ProviderSpecificInstanceBinary, error) {
indexFullPath := filepath.Join(s.downloadRoot, s.provider.String(), MIRROR_INDEX_FILE)
indexContents, err := os.ReadFile(indexFullPath)
if err != nil {
s.sugar.Errorf("unable to read index file %s: %w", indexFullPath, err)
return nil, fmt.Errorf("error loading catalog: %w", err)
}
var index MirrorIndex
err = json.Unmarshal(indexContents, &index)
if err != nil {
return nil, err
}
sugar.Debugf("unmarshalled index: %v", index)
var psibs []ProviderSpecificInstanceBinary
// per Hashicorp docs at https://www.terraform.io/internals/provider-network-mirror-protocol#sample-response
// the value for each key is currently an empty object
for versionNumber := range index.Versions {
sugar.Debugf("examining version %s", versionNumber)
versionJsonFullPath := filepath.Join(s.downloadRoot, s.provider.String(), fmt.Sprintf("%s.json", versionNumber))
versionJsonContents, err := os.ReadFile(versionJsonFullPath)
if err != nil {
s.sugar.Errorf("unable to read version JSON file %s: %w", versionJsonFullPath, err)
continue
}
var archives MirrorArchives
err = json.Unmarshal(versionJsonContents, &archives)
if err != nil {
s.sugar.Errorf("unable to unmarshal version JSON file %s: %w")
}
for osAndArch, hashesAndUrl := range archives.Archives {
if len(hashesAndUrl.Hashes) != 1 {
s.sugar.Errorf("provider version %s (%s) has multiple available hashes", versionNumber, osAndArch)
continue
}
os, arch, found := strings.Cut(osAndArch, "_")
if !found {
s.sugar.Errorf("provider version %s (%s) did not have expected split delimiter _", versionNumber, osAndArch)
continue
}
psib := ProviderSpecificInstanceBinary{
FullPath: filepath.Join(s.downloadRoot, s.provider.String(), hashesAndUrl.URL),
H1Checksum: hashesAndUrl.Hashes[0], // right now there's only the h1 hash so we just pick the first one
ProviderSpecificInstance: ProviderSpecificInstance{
Provider: s.provider,
Version: versionNumber,
OS: os,
Arch: arch,
},
}
sugar.Debugf("generated PSIB %#v", psib)
psibs = append(psibs, psib)
}
}
return psibs, nil
}
func (s FSProviderStorageConfiguration) VerifyCatalogAgainstStorage(
catalog []ProviderSpecificInstanceBinary,
) (
validLocalBinaries []ProviderSpecificInstanceBinary,
invalidLocalBinaries []ProviderSpecificInstanceBinary,
err error,
) {
sugar.Debugf("verifying catalog data: %v", catalog)
for _, pib := range catalog {
hash, err := dirhash.HashZip(pib.FullPath, dirhash.Hash1)
if err != nil {
sugar.Debugf("err: %w", err)
invalidLocalBinaries = append(invalidLocalBinaries, pib)
continue
}
if hash != pib.H1Checksum {
sugar.Errorf("checksum %s did not match expected %s", hash, pib.H1Checksum)
invalidLocalBinaries = append(invalidLocalBinaries, pib)
continue
}
validLocalBinaries = append(validLocalBinaries, pib)
}
sugar.Debugf("valid local binaries: %v", validLocalBinaries)
sugar.Debugf("invalid local binaries: %v", invalidLocalBinaries)
return validLocalBinaries, invalidLocalBinaries, nil
}
func (s FSProviderStorageConfiguration) ReconcileWantedProviderInstances(
validPSIBs []ProviderSpecificInstanceBinary,
invalidPSIBs []ProviderSpecificInstanceBinary,
wantedProviderInstances []ProviderSpecificInstance,
) (reconciledPIs []ProviderSpecificInstance) {
return commonReconcileWantedProviderInstances(validPSIBs, invalidPSIBs, wantedProviderInstances)
}
func (s FSProviderStorageConfiguration) WriteProviderBinaryDataToStorage(
binaryData []byte,
pi ProviderSpecificInstance,
) (psib *ProviderSpecificInstanceBinary, err error) {
dirPath := filepath.Join(s.downloadRoot, pi.GetDownloadBase())
err = os.MkdirAll(dirPath, os.FileMode(0755))
if err != nil {
return nil, err
}
fullPath := filepath.Join(dirPath, pi.GetDownloadedFileName())
err = os.WriteFile(fullPath, binaryData, os.FileMode(0644))
if err != nil {
return nil, err
}
hash, err := dirhash.HashZip(fullPath, dirhash.Hash1)
if err != nil {
return nil, err
}
return &ProviderSpecificInstanceBinary{
ProviderSpecificInstance: pi,
H1Checksum: hash,
FullPath: fullPath,
}, nil
}
func (s FSProviderStorageConfiguration) StoreCatalog(psibs []ProviderSpecificInstanceBinary) error {
versionMap := make(map[string][]ProviderSpecificInstanceBinary)
mirrorIndex := MirrorIndex{
Versions: make(map[string]map[string]any),
}
for _, psib := range psibs {
if _, ok := versionMap[psib.Version]; !ok {
versionMap[psib.Version] = []ProviderSpecificInstanceBinary{}
}
versionMap[psib.Version] = append(versionMap[psib.Version], psib)
}
for version, binaries := range versionMap {
mirrorArchives := MirrorArchives{
Archives: make(map[string]MirrorProviderPlatformArch),
}
for _, binary := range binaries {
osArch := fmt.Sprintf("%s_%s", binary.OS, binary.Arch)
mirrorArchives.Archives[osArch] = MirrorProviderPlatformArch{
Hashes: []string{binary.H1Checksum},
URL: binary.GetDownloadedFileName(),
}
}
versionJson, err := json.MarshalIndent(mirrorArchives, "", " ")
if err != nil {
return fmt.Errorf("error marshalling version JSON: %w", err)
}
versionJsonPath := filepath.Join(s.downloadRoot, s.provider.GetDownloadBase(), fmt.Sprintf("%s.json", version))
err = os.WriteFile(versionJsonPath, versionJson, os.FileMode(0644))
if err != nil {
return fmt.Errorf("error writing version JSON: %w", err)
}
mirrorIndex.Versions[version] = make(map[string]any)
}
mirrorIndexJson, err := json.MarshalIndent(mirrorIndex, "", " ")
if err != nil {
return fmt.Errorf("error marshalling mirror index JSON: %w", err)
}
mirrorIndexJsonPath := filepath.Join(s.downloadRoot, s.provider.GetDownloadBase(), MIRROR_INDEX_FILE)
err = os.WriteFile(mirrorIndexJsonPath, mirrorIndexJson, os.FileMode(0644))
if err != nil {
return fmt.Errorf("error writing index JSON: %w", err)
}
return nil
}