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hg update [-C|-c|-m] [-d DATE] [[-r] REV]

aliases: up, checkout, co

update working directory (or switch revisions)

    Update the repository's working directory to the specified
    changeset. If no changeset is specified, update to the tip of the
    current named branch and move the active bookmark (see :hg:`help
    bookmarks`).

    Update sets the working directory's parent revision to the specified
    changeset (see :hg:`help parents`).

    If the changeset is not a descendant or ancestor of the working
    directory's parent and there are uncommitted changes, the update is
    aborted. With the -c/--check option, the working directory is checked
    for uncommitted changes; if none are found, the working directory is
    updated to the specified changeset.

    .. container:: verbose

      The -C/--clean, -c/--check, and -m/--merge options control what
      happens if the working directory contains uncommitted changes.
      At most of one of them can be specified.

      1. If no option is specified, and if
         the requested changeset is an ancestor or descendant of
         the working directory's parent, the uncommitted changes
         are merged into the requested changeset and the merged
         result is left uncommitted. If the requested changeset is
         not an ancestor or descendant (that is, it is on another
         branch), the update is aborted and the uncommitted changes
         are preserved.

      2. With the -m/--merge option, the update is allowed even if the
         requested changeset is not an ancestor or descendant of
         the working directory's parent.

      3. With the -c/--check option, the update is aborted and the
         uncommitted changes are preserved.

      4. With the -C/--clean option, uncommitted changes are discarded and
         the working directory is updated to the requested changeset.

    To cancel an uncommitted merge (and lose your changes), use
    :hg:`merge --abort`.

    Use null as the changeset to remove the working directory (like
    :hg:`clone -U`).

    If you want to revert just one file to an older revision, use
    :hg:`revert [-r REV] NAME`.

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

    Returns 0 on success, 1 if there are unresolved files.
    

options:

 == =========== =======================================
 -C --clean     discard uncommitted changes (no backup)
 -c --check     require clean working directory        
 -m --merge     merge uncommitted changes              
 -d --date DATE tipmost revision matching date         
 -r --rev REV   revision                               
 -t --tool TOOL specify merge tool                     
 == =========== =======================================

global options ([+] can be repeated):

 == =================== ==================================================================
 -R --repository REPO   repository root directory or name of overlay bundle file          
    --cwd DIR           change working directory                                          
 -y --noninteractive    do not prompt, automatically pick the first choice for all prompts
 -q --quiet             suppress output                                                   
 -v --verbose           enable additional output                                          
    --color TYPE        when to colorize (boolean, always, auto, never, or debug)         
    --config CONFIG [+] set/override config option (use 'section.name=value')             
    --debug             enable debugging output                                           
    --debugger          start debugger                                                    
    --encoding ENCODE   set the charset encoding (default: ascii)                         
    --encodingmode MODE set the charset encoding mode (default: strict)                   
    --traceback         always print a traceback on exception                             
    --time              time how long the command takes                                   
    --profile           print command execution profile                                   
    --version           output version information and exit                               
 -h --help              display help and exit                                             
    --hidden            consider hidden changesets                                        
    --pager TYPE        when to paginate (boolean, always, auto, or never) (default: auto)
 == =================== ==================================================================