hg backout - reverse effect of earlier changeset

       Prepare  a  new changeset with the effect of REV undone in the current working directory. If no conflicts
       were encountered, it will be committed immediately.

       If REV is the parent of the working directory, then this new changeset is committed automatically (unless
       --no-commit is specified).

       Note   hgbackout cannot be used to fix either an unwanted or incorrect merge.

       Examples:

       • Reverse the effect of the parent of the working directory.  This backout will be committed immediately:

         hg backout -r .

       • Reverse the effect of previous bad revision 23:

         hg backout -r 23

       • Reverse the effect of previous bad revision 23 and leave changes uncommitted:

         hg backout -r 23 --no-commit
         hg commit -m "Backout revision 23"

         By default, the pending changeset will have one parent, maintaining a linear history. With --merge, the
         pending changeset will instead have two parents: the old parent of the  working  directory  and  a  new
         child of REV that simply undoes REV.

         Before  version  1.7,  the behavior without --merge was equivalent to specifying --merge followed by hgupdate--clean. to cancel the merge and leave the child of REV as a head to be merged separately.

         See hghelpdates for a list of formats valid for -d/--date.

         See hghelprevert for a way to restore files to the state of another revision.

         Returns 0 on success, 1 if nothing to backout or there are unresolved files.

       hg backout - reverse effect of earlier changeset

--merge
              merge with old dirstate parent after backout

       --commit
              commit if no conflicts were encountered (DEPRECATED)

       --no-commit
              do not commit

       --parent<REV>
              parent to choose when backing out merge (DEPRECATED)

       -r,--rev<REV>
              revision to backout

       -e,--edit
              invoke editor on commit messages

       -t,--tool<TOOL>
              specify merge tool

       -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

              [+] marked option can be specified multiple times

                                                                                                     HG(BACKOUT)

       hg backout [OPTION]... [-r] REV