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.

  options ([+] can be repeated):

   -A --addremove           mark new/missing files as added/removed before

                            committing

      --close-branch        mark a branch as closed, hiding it from the branch

                            list

   -s --secret              use the secret phase for committing

   -e --edit                invoke editor on commit messages

   -I --include PATTERN [+] include names matching the given patterns

   -X --exclude PATTERN [+] exclude names matching the given patterns

   -m --message TEXT        use text as commit message

   -l --logfile FILE        read commit message from file

   -d --date DATE           record the specified date as commit date

   -u --user USER           record the specified user as committer

   -S --subrepos            recurse into subrepositories

   -w --ignore-all-space    ignore white space when comparing lines

   -b --ignore-space-change ignore changes in the amount of white space

   -B --ignore-blank-lines  ignore changes whose lines are all blank

  (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