a360324f62
This commit cleans up the package structure, to make two new top-level packages `internal` (for internal-use packages) and `pkg` (for general shared utility code).
124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
package cmd
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import (
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"io/fs"
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"os"
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wisski_distillery "github.com/FAU-CDI/wisski-distillery"
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"github.com/FAU-CDI/wisski-distillery/internal/core"
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"github.com/FAU-CDI/wisski-distillery/internal/env"
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"github.com/FAU-CDI/wisski-distillery/pkg/logging"
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"github.com/FAU-CDI/wisski-distillery/pkg/targz"
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"github.com/tkw1536/goprogram/exit"
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)
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// Backup is the 'backup' command
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var Backup wisski_distillery.Command = backup{}
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type backup struct {
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NoPrune bool `short:"n" long:"no-prune" description:"Do not prune older backup archives"`
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StagingOnly bool `short:"s" long:"staging-only" description:"Do not package into a backup archive, but only create a staging directory"`
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Positionals struct {
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Dest string `positional-arg-name:"DEST" description:"Destination path to write backup archive to. Defaults to the snapshots/archives/ directory"`
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} `positional-args:"true"`
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}
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func (backup) Description() wisski_distillery.Description {
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return wisski_distillery.Description{
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Requirements: core.Requirements{
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NeedsDistillery: true,
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},
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Command: "backup",
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Description: "Makes a backup of the entire distillery",
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}
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}
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var errBackupFailed = exit.Error{
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Message: "Failed to make a backup",
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ExitCode: exit.ExitGeneric,
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}
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func (bk backup) Run(context wisski_distillery.Context) error {
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dis := context.Environment
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var err error
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if !bk.NoPrune {
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defer logging.LogOperation(func() error {
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return dis.PruneBackups(context.IOStream)
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}, context.IOStream, "Pruning old backups")
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}
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// determine the target path for the archive
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var sPath string
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if !bk.StagingOnly {
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// regular mode: create a temporary staging directory
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logging.LogMessage(context.IOStream, "Creating new snapshot staging directory")
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sPath, err = dis.NewSnapshotStagingDir("")
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if err != nil {
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return errSnapshotFailed.Wrap(err)
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}
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defer func() {
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logging.LogMessage(context.IOStream, "Removing snapshot staging directory")
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os.RemoveAll(sPath)
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}()
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} else {
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// staging mode: use dest as a destination
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sPath = bk.Positionals.Dest
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if sPath == "" {
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sPath, err = dis.NewSnapshotStagingDir("")
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if err != nil {
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return errSnapshotFailed.Wrap(err)
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}
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}
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// create the directory (if it doesn't already exist)
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logging.LogMessage(context.IOStream, "Creating staging directory")
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err = os.Mkdir(sPath, fs.ModePerm)
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if !os.IsExist(err) && err != nil {
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return errSnapshotFailed.WithMessageF(err)
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}
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err = nil
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}
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context.Println(sPath)
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logging.LogOperation(func() error {
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// take a snapshot into the staging area!
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backup := dis.Backup(context.IOStream, env.BackupDescription{
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Dest: sPath,
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})
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// write out the report, ignoring any errors!
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backup.WriteReport(context.IOStream)
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return nil
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}, context.IOStream, "Generating Backup")
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// if we requested to only have a staging area, then we are done
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if bk.StagingOnly {
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context.Printf("Wrote %s\n", sPath)
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return nil
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}
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// create the archive path
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archivePath := bk.Positionals.Dest
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if archivePath == "" {
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archivePath = dis.NewSnapshotArchivePath("")
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}
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// and write everything into it!
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// TODO: Should we move the open call to here?
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var count int64
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if err := logging.LogOperation(func() error {
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context.IOStream.Println(archivePath)
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count, err = targz.Package(archivePath, sPath, func(dst, src string) {
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context.Println(dst)
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})
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return err
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}, context.IOStream, "Writing backup archive"); err != nil {
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return errSnapshotFailed.Wrap(err)
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}
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context.Printf("Wrote %d byte(s) to %s\n", count, archivePath)
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return nil
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}
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