Set up a repo

  $ cat <<EOF >> $HGRCPATH

  > [ui]

  > interactive = true

  > [extensions]

  > record =

  > EOF

  $ hg init a

  $ cd a

Record help

  $ hg record -h

  hg record [OPTION]... [FILE]...

  interactively select changes to commit

      If a list of files is omitted, all changes reported by 'hg status' will be

      candidates for recording.

      See 'hg help dates' for a list of formats valid for -d/--date.

      You will be prompted for whether to record changes to each modified file,

      and for files with multiple changes, for each change to use. For each

      query, the following responses are possible:

        y - record this change

        n - skip this change

        e - edit this change manually

        s - skip remaining changes to this file

        f - record remaining changes to this file

        d - done, skip remaining changes and files

        a - record all changes to all remaining files

        q - quit, recording no changes

        ? - display help

      This command is not available when committing a merge.

  (use 'hg help -e record' to show help for the record extension)

  options ([+] can be repeated):

  (some details hidden, use --verbose to show complete help)

Select no files

  $ touch empty-rw

  $ hg add empty-rw

  $ hg record empty-rw<<EOF

  > n

  > EOF

  diff --git a/empty-rw b/empty-rw

  new file mode 100644

  examine changes to 'empty-rw'? [Ynesfdaq?] n

  no changes to record

  $ hg tip -p

  changeset:   -1:000000000000

  tag:         tip

  user:        

  date:        Thu Jan 01 00:00:00 1970 +0000