4800c5e988
We add a --fixup option to the "git lfs migrate info" command which has similar properties as the --fixup option to the "git lfs migrate import" command, namely that it looks for files in the repository which should be Git LFS pointers (according to the filter settings in .gitattributes) but which are not. In the case of the "migrate info" command this new option only reports the sum totals for any such files, and does not make any changes to the repository. When the --fixup option is supplied, the "migrate info" command will not output a summary of any other files, including .gitattributes files, which are otherwise normally included in the command's final output. The new --fixup option is taken to imply the --pointers=ignore option, and is incompatible with any other settings of that option.
339 lines
9.1 KiB
Go
339 lines
9.1 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/errors"
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"github.com/git-lfs/git-lfs/git/gitattr"
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"github.com/git-lfs/git-lfs/git/githistory"
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"github.com/git-lfs/git-lfs/lfs"
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"github.com/git-lfs/git-lfs/tasklog"
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"github.com/git-lfs/git-lfs/tools"
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"github.com/git-lfs/git-lfs/tools/humanize"
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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, "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, "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("fatal: 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("fatal: 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("fatal: 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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stat := fmt.Sprintf("%d/%d files(s)",
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above, total)
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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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