348 lines
9.4 KiB
Go
348 lines
9.4 KiB
Go
package commands
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"sort"
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"strings"
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"github.com/git-lfs/git-lfs/v3/errors"
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"github.com/git-lfs/git-lfs/v3/git/gitattr"
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"github.com/git-lfs/git-lfs/v3/git/githistory"
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"github.com/git-lfs/git-lfs/v3/lfs"
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"github.com/git-lfs/git-lfs/v3/tasklog"
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"github.com/git-lfs/git-lfs/v3/tools"
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"github.com/git-lfs/git-lfs/v3/tools/humanize"
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"github.com/git-lfs/git-lfs/v3/tr"
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"github.com/git-lfs/gitobj/v2"
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"github.com/spf13/cobra"
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)
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type migrateInfoPointersType int
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const (
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migrateInfoPointersFollow = migrateInfoPointersType(iota)
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migrateInfoPointersNoFollow = migrateInfoPointersType(iota)
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migrateInfoPointersIgnore = migrateInfoPointersType(iota)
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)
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var (
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// migrateInfoTopN is a flag given to the git-lfs-migrate(1) subcommand
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// 'info' which specifies how many info entries to show by default.
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migrateInfoTopN int
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// migrateInfoAboveFmt is a flag given to the git-lfs-migrate(1)
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// subcommand 'info' specifying a human-readable string threshold of
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// filesize before entries are counted.
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migrateInfoAboveFmt string
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// migrateInfoAbove is the number of bytes parsed from the above
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// migrateInfoAboveFmt flag.
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migrateInfoAbove uint64
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// migrateInfoUnitFmt is a flag given to the git-lfs-migrate(1)
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// subcommand 'info' specifying a human-readable string of units with
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// which to display the number of bytes.
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migrateInfoUnitFmt string
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// migrateInfoUnit is the number of bytes in the unit given as
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// migrateInfoUnitFmt.
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migrateInfoUnit uint64
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// migrateInfoPointers is an option given to the git-lfs-migrate(1)
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// subcommand 'info' specifying how to treat Git LFS pointers.
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migrateInfoPointers string
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// migrateInfoPointersMode is the Git LFS pointer treatment mode
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// parsed from migrateInfoPointers.
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migrateInfoPointersMode migrateInfoPointersType
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)
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func migrateInfoCommand(cmd *cobra.Command, args []string) {
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l := tasklog.NewLogger(os.Stderr,
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tasklog.ForceProgress(cfg.ForceProgress()),
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)
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db, err := getObjectDatabase()
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if err != nil {
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ExitWithError(err)
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}
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defer db.Close()
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rewriter := getHistoryRewriter(cmd, db, l)
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exts := make(map[string]*MigrateInfoEntry)
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above, err := humanize.ParseBytes(migrateInfoAboveFmt)
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if err != nil {
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ExitWithError(errors.Wrap(err, tr.Tr.Get("cannot parse --above=<n>")))
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}
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if u := cmd.Flag("unit"); u.Changed {
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unit, err := humanize.ParseByteUnit(u.Value.String())
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if err != nil {
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ExitWithError(errors.Wrap(err, tr.Tr.Get("cannot parse --unit=<unit>")))
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}
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migrateInfoUnit = unit
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}
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pointers := cmd.Flag("pointers")
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if pointers.Changed {
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switch pointers.Value.String() {
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case "follow":
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migrateInfoPointersMode = migrateInfoPointersFollow
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case "no-follow":
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migrateInfoPointersMode = migrateInfoPointersNoFollow
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case "ignore":
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migrateInfoPointersMode = migrateInfoPointersIgnore
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default:
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ExitWithError(errors.Errorf(tr.Tr.Get("Unsupported --pointers option value")))
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}
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}
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if migrateFixup {
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include, exclude := getIncludeExcludeArgs(cmd)
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if include != nil || exclude != nil {
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ExitWithError(errors.Errorf(tr.Tr.Get("Cannot use --fixup with --include, --exclude")))
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}
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if pointers.Changed && migrateInfoPointersMode != migrateInfoPointersIgnore {
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ExitWithError(errors.Errorf(tr.Tr.Get("Cannot use --fixup with --pointers=%s", pointers.Value.String())))
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}
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migrateInfoPointersMode = migrateInfoPointersIgnore
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}
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migrateInfoAbove = above
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pointersInfoEntry := &MigrateInfoEntry{Qualifier: "LFS Objects", Separate: true}
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var fixups *gitattr.Tree
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migrate(args, rewriter, l, &githistory.RewriteOptions{
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BlobFn: func(path string, b *gitobj.Blob) (*gitobj.Blob, error) {
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var entry *MigrateInfoEntry
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var size int64
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var p *lfs.Pointer
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var err error
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if migrateFixup {
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if filepath.Base(path) == ".gitattributes" {
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return b, nil
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}
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var ok bool
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attrs := fixups.Applied(path)
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for _, attr := range attrs {
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if attr.K == "filter" {
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ok = attr.V == "lfs"
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}
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}
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if !ok {
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return b, nil
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}
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}
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if migrateInfoPointersMode != migrateInfoPointersNoFollow {
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p, err = lfs.DecodePointerFromBlob(b)
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}
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if p != nil && err == nil {
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if migrateInfoPointersMode == migrateInfoPointersIgnore {
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return b, nil
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}
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entry = pointersInfoEntry
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size = p.Size
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} else {
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entry = findEntryByExtension(exts, path)
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size = b.Size
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}
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entry.Total++
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if size > int64(migrateInfoAbove) {
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entry.TotalAbove++
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entry.BytesAbove += size
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}
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return b, nil
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},
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TreePreCallbackFn: func(path string, t *gitobj.Tree) error {
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if migrateFixup && path == "/" {
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var err error
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fixups, err = gitattr.New(db, t)
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if err != nil {
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return err
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}
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return nil
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}
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return nil
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},
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})
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l.Close()
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entries := EntriesBySize(MapToEntries(exts))
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entries = removeEmptyEntries(entries)
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sort.Sort(sort.Reverse(entries))
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migrateInfoTopN = tools.ClampInt(migrateInfoTopN, 0, len(entries))
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entries = entries[:migrateInfoTopN]
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if pointersInfoEntry.Total > 0 {
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entries = append(entries, pointersInfoEntry)
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}
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entries.Print(os.Stdout)
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}
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// MigrateInfoEntry represents a tuple of filetype to bytes and entry count
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// above and below a threshold.
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type MigrateInfoEntry struct {
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// Qualifier is the filepath's extension.
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Qualifier string
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// Separate indicates if the entry should be printed separately.
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Separate bool
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// BytesAbove is total size of all files above a given threshold.
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BytesAbove int64
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// TotalAbove is the count of all files above a given size threshold.
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TotalAbove int64
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// Total is the count of all files.
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Total int64
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}
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// findEntryByExtension finds or creates an entry from the given map that
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// corresponds with the given path's file extension (or the path's file name
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// if there is no file extension).
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func findEntryByExtension(exts map[string]*MigrateInfoEntry, path string) *MigrateInfoEntry {
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ext := fmt.Sprintf("*%s", filepath.Ext(path))
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// If extension exists, group all items under extension,
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// else just use the file name.
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var groupName string
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if len(ext) > 1 {
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groupName = ext
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} else {
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groupName = filepath.Base(path)
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}
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entry := exts[groupName]
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if entry == nil {
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entry = &MigrateInfoEntry{Qualifier: groupName}
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exts[groupName] = entry
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}
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return entry
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}
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// MapToEntries creates a set of `*MigrateInfoEntry`'s for a given map of
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// filepath extensions to file size in bytes.
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func MapToEntries(exts map[string]*MigrateInfoEntry) []*MigrateInfoEntry {
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entries := make([]*MigrateInfoEntry, 0, len(exts))
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for _, entry := range exts {
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entries = append(entries, entry)
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}
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return entries
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}
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// removeEmptyEntries removes `*MigrateInfoEntry`'s for which no matching file
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// is above the given threshold "--above".
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func removeEmptyEntries(entries []*MigrateInfoEntry) []*MigrateInfoEntry {
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nz := make([]*MigrateInfoEntry, 0, len(entries))
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for _, e := range entries {
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if e.TotalAbove > 0 {
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nz = append(nz, e)
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}
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}
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return nz
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}
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// EntriesBySize is an implementation of sort.Interface that sorts a set of
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// `*MigrateInfoEntry`'s
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type EntriesBySize []*MigrateInfoEntry
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// Len returns the total length of the set of `*MigrateInfoEntry`'s.
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func (e EntriesBySize) Len() int { return len(e) }
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// Less returns the whether or not the MigrateInfoEntry given at `i` takes up
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// less total size than the MigrateInfoEntry given at `j`.
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func (e EntriesBySize) Less(i, j int) bool {
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if e[i].BytesAbove == e[j].BytesAbove {
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return e[i].Qualifier > e[j].Qualifier
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} else {
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return e[i].BytesAbove < e[j].BytesAbove
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}
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}
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// Swap swaps the entries given at i, j.
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func (e EntriesBySize) Swap(i, j int) { e[i], e[j] = e[j], e[i] }
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// Print formats the `*MigrateInfoEntry`'s in the set and prints them to the
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// given io.Writer, "to", returning "n" the number of bytes written, and any
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// error, if one occurred.
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func (e EntriesBySize) Print(to io.Writer) (int, error) {
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if len(e) == 0 {
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return 0, nil
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}
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extensions := make([]string, 0, len(e))
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separateFlags := make([]bool, 0, len(e))
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sizes := make([]string, 0, len(e))
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stats := make([]string, 0, len(e))
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percentages := make([]string, 0, len(e))
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for _, entry := range e {
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bytesAbove := uint64(entry.BytesAbove)
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above := entry.TotalAbove
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total := entry.Total
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percentAbove := 100 * (float64(above) / float64(total))
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var size string
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if migrateInfoUnit > 0 {
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size = humanize.FormatBytesUnit(bytesAbove, migrateInfoUnit)
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} else {
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size = humanize.FormatBytes(bytesAbove)
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}
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// TRANSLATORS: The strings here are intended to have the same
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// display width including spaces, so please insert trailing
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// spaces as necessary for your language.
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stat := fmt.Sprintf(tr.Tr.GetN(
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"%d/%d file ",
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"%d/%d files",
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int(total),
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above,
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total,
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))
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percentage := fmt.Sprintf("%.0f%%", percentAbove)
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extensions = append(extensions, entry.Qualifier)
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separateFlags = append(separateFlags, entry.Separate)
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sizes = append(sizes, size)
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stats = append(stats, stat)
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percentages = append(percentages, percentage)
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}
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extensions = tools.Ljust(extensions)
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sizes = tools.Ljust(sizes)
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stats = tools.Rjust(stats)
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percentages = tools.Rjust(percentages)
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output := make([]string, 0, len(e))
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for i := 0; i < len(e); i++ {
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extension := extensions[i]
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size := sizes[i]
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stat := stats[i]
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percentage := percentages[i]
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line := strings.Join([]string{extension, size, stat, percentage}, "\t")
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if i > 0 && separateFlags[i] {
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output = append(output, "")
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}
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output = append(output, line)
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}
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return fmt.Fprintln(to, strings.Join(output, "\n"))
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}
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