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77 lines
2.3 KiB
Go
77 lines
2.3 KiB
Go
package configload
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import (
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"os"
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"path/filepath"
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"github.com/hashicorp/terraform/internal/modsdir"
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"github.com/hashicorp/terraform/registry"
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"github.com/hashicorp/terraform/svchost/disco"
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"github.com/spf13/afero"
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)
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type moduleMgr struct {
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FS afero.Afero
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// CanInstall is true for a module manager that can support installation.
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//
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// This must be set only if FS is an afero.OsFs, because the installer
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// (which uses go-getter) is not aware of the virtual filesystem
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// abstraction and will always write into the "real" filesystem.
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CanInstall bool
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// Dir is the path where descendent modules are (or will be) installed.
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Dir string
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// Services is a service discovery client that will be used to find
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// remote module registry endpoints. This object may be pre-loaded with
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// cached discovery information.
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Services *disco.Disco
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// Registry is a client for the module registry protocol, which is used
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// when a module is requested from a registry source.
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Registry *registry.Client
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// manifest tracks the currently-installed modules for this manager.
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//
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// The loader may read this. Only the installer may write to it, and
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// after a set of updates are completed the installer must call
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// writeModuleManifestSnapshot to persist a snapshot of the manifest
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// to disk for use on subsequent runs.
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manifest modsdir.Manifest
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}
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func (m *moduleMgr) manifestSnapshotPath() string {
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return filepath.Join(m.Dir, modsdir.ManifestSnapshotFilename)
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}
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// readModuleManifestSnapshot loads a manifest snapshot from the filesystem.
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func (m *moduleMgr) readModuleManifestSnapshot() error {
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r, err := m.FS.Open(m.manifestSnapshotPath())
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if err != nil {
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if os.IsNotExist(err) {
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// We'll treat a missing file as an empty manifest
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m.manifest = make(modsdir.Manifest)
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return nil
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}
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return err
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}
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m.manifest, err = modsdir.ReadManifestSnapshot(r)
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return err
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}
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// writeModuleManifestSnapshot writes a snapshot of the current manifest
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// to the filesystem.
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//
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// The caller must guarantee no concurrent modifications of the manifest for
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// the duration of a call to this function, or the behavior is undefined.
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func (m *moduleMgr) writeModuleManifestSnapshot() error {
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w, err := m.FS.Create(m.manifestSnapshotPath())
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if err != nil {
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return err
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}
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return m.manifest.WriteSnapshot(w)
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}
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