NAME

       mu scm - bindings and shell for the GNU Guile programming language.

SYNOPSIS

       mu scm [COMMON-OPTIONS]

       starts the GNU Guile shell.

       mu scm [COMMON-OPTIONS] [[COMMAND] -- [COMMAND-OPTIONS]]

       runs a GNU Guile script.

DESCRIPTION

       mu  scm  is  the command to use the bindings to the GNU Guile programming language.  It can either open a
       shell ("REPL") or run scripts.

       Using mu scm, you can script mu.

SCM OPTIONS

   --listen
       With the --listen parameter, mu scm starts listening on a UNIX domain  socket.   This  can  be  used  for
       communicating  with  the  REPL  using  some  external  tool, such as Emacs with the "Geiser" package. For
       details, refer to the mu-scm Info manual.

       It blocks after printing the name of the socket (which is a randomized name), prefixed  by  UNIX_CONNECT:
       and ending with a newline. For instance:
              UNIX-CONNECT:/run/user/1000/mu-scm-socket-4eb5db40

   --muhome
       Use a non-default directory to store and read the database, write the logs, etc.  By default, mu uses the
       XDG  Base  Directory  Specification  (e.g.  on  GNU/Linux this defaults to ~/.cache/mu and ~/.config/mu).
       Earlier versions of mu defaulted to ~/.mu, which now requires --muhome=~/.mu.

       The environment variable MUHOME can be used as an alternative to --muhome. The latter has precedence.

COMMON OPTIONS

   -d, --debug
       Makes mu generate extra debug information, useful for debugging the  program  itself.  Debug  information
       goes to the standard logging location; see mu(1).

   -q, --quiet
       Causes  mu  not to output informational messages and progress information to standard output, but only to
       the log file. Error messages will still be sent to standard error. Note that mu index is much faster with
       --quiet, so it is recommended you use this option when using mu from scripts etc.

   --log-stderr
       Causes mu to not output log messages to standard error, in addition  to  sending  them  to  the  standard
       logging location.

   --nocolor
       Do not use ANSI colors. The environment variable NO_COLOR can be used as an alternative to --nocolor.

   -V, --version
       Prints mu version and copyright information.

   -h, --help
       Lists the various command line options.

EXIT CODE

       This command returns 0 upon successful completion, or a non-zero exit code otherwise.

       0.  success

       2.  no matches found. Try a different query

       11. database schema mismatch. You need to re-initialize mu, see mu-init(1)

       19. failed to acquire lock. Some other program has exclusive access to the mu database

       99. caught an exception

ENVIRONMENT

       By  default,  mu  scm  expects  its  internal  files  to  be  found in <prefix>/hare/mu/scm. However, for
       development/testing you can set the environment variable MU_SCM_DIR to some alternative directory.

SEE ALSO

       The full documentation for mu scm is maintained as a Texinfo manual. If the  info  and  mu  programs  are
       properly installed at your site, the command info mu-scm should give you access to the complete manual.

       http://www.schemers.org provides a general introduction to the Scheme language.

       emacs(1)

REPORTING BUGS

       Please report bugs at https://github.com/djcb/mu/issues.

AUTHOR

       Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>

COPYRIGHT

       This manpage is part of mu 1.12.13.

       Copyright   ©   2008-2025   Dirk-Jan   C.   Binnema.   License   GPLv3+:  GNU  GPL  version  3  or  later
       https://gnu.org/licenses/gpl.html. This is free software: you are free to  change  and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.

                                                                                                       MU SCM(1)