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lsjson: add --no-mimetype flag, speed up lsf

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Before this changed we unconditionally fetched the MimeType. On Some
backends like s3 and swift this takes an extra transaction which meant
that `lsf` on those backends was needlessly slow.

This adds an internal option so `lsf` can declare whether it wants
MimeTypes or not depending on whether the user asked for them and an
external flag `--no-mimetype` for `lsjson`.

See: https://forum.rclone.org/t/reliably-setup-incremental-updates/14006/8
This commit is contained in:
Nick Craig-Wood
2020-01-26 16:38:00 +00:00
parent 9c9cdf1712
commit bfd9f32188
3 changed files with 17 additions and 9 deletions
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5
cmd/lsjson/lsjson.go
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@@ -24,6 +24,7 @@ func init() {
flags.BoolVarP(cmdFlags, &opt.Recurse, "recursive", "R", false, "Recurse into the listing.")
flags.BoolVarP(cmdFlags, &opt.ShowHash, "hash", "", false, "Include hashes in the output (may take longer).")
flags.BoolVarP(cmdFlags, &opt.NoModTime, "no-modtime", "", false, "Don't read the modification time (can speed things up).")
flags.BoolVarP(cmdFlags, &opt.NoMimeType, "no-mimetype", "", false, "Don't read the mime type (can speed things up).")
flags.BoolVarP(cmdFlags, &opt.ShowEncrypted, "encrypted", "M", false, "Show the encrypted names.")
flags.BoolVarP(cmdFlags, &opt.ShowOrigIDs, "original", "", false, "Show the ID of the underlying Object.")
flags.BoolVarP(cmdFlags, &opt.FilesOnly, "files-only", "", false, "Show only files in the listing.")
@@ -59,7 +60,9 @@ The output is an array of Items, where each Item looks like this
If --hash is not specified the Hashes property won't be emitted.
If --no-modtime is specified then ModTime will be blank.
If --no-modtime is specified then ModTime will be blank. This can speed things up on remotes where reading the ModTime takes an extra request (eg s3, swift).
If --no-mimetype is specified then MimeType will be blank. This can speed things up on remotes where reading the MimeType takes an extra request (eg s3, swift).
If --encrypted is not specified the Encrypted won't be emitted.