gosh man page

gosh — a Scheme script interpreter

Synopsis

gosh [-biqV] [-I path ] [-A path ] [-u module ] [-l file ] [-e expr ] [-E expr ] [-f flag ] [--] [ script argument ... ]

Description

Gosh is a stand-alone Scheme interpreter built on top of the Gauche Scheme script engine.

When script is given, gosh loads the script, evaluating Scheme code in it. Then, if the script defines a procedure named main, gosh calls it with a single argument which is a list of the script name and subsequent arguments. When main returns an integer value, gosh exits with it as an exit code. If main returns non-integer value, or an error is signaled during evaluation, gosh exits with exit code 70 (EX_SOFTWARE). See SRFI-22 (http://srfi.schemers.org/srfi-22/srfi-22.html) for details. If there's no main procedure defined in the script, gosh exits with code 0 after loading the script file.

If no script file is given, gosh goes into an interactive mode. By default, gosh prompts the user to enter a Scheme expression, read and evaluates it, then prints the result, until EOF is read. If the standard input is not a terminal, however, gosh doesn't print a prompt; it allows a user to use gosh as a filter program. This behavior can be controlled by -i or -b option; see below.

Options

Command line options are processed before loading the script file or entering the interactive mode.

The options -I, -A, -u, -l, -L, -e and -E are processed in the order of appearance.  For example, adding a load path by -I option affects the -l options after it, but not the ones before it.

-V

Prints gosh version and exits.

-b

Batch mode.  Doesn't print prompt even the standard input is a terminal.  Supersedes -i.

-i

Interactive mode.  Forces to print prompt, even the standard input is not a terminal.

-q

Prevents reading the default initialization file.

-Ipath

Adds path in front of the load path list.

-Apath

Appends path to the tail of the load path list.

-umodule

Loads and imports module, as if "(use module )" is specified in the code.

-lfile

Loads a Scheme file file.

-Lfile

Like -l, but doesn't complain if file doesn't exist.

-eexpr

Evaluates a Scheme expression expr.

-Eexpr

Same as -e, except that the expr is read as if it is surrounded by parenthesis.

-ptype

Turns on the profiler.  Currently type can only be 'time'.

-fflag

Sets various flags.
 case-fold       uses case-insensitive reader (as in R5RS)
 load-verbose    report while loading files
 no-inline       don't inline primitive procedures and constants
                 (combined no-inline-globals, no-inline-locals, and
                 no-inline-constants.)
 no-inline-globals don't inline global procedures.
 no-inline-locals  don't inline local procedures.
 no-inline-constants don't inline constants.
 no-post-inline-pass don't run post-inline optimization pass.

-Ffeature

Makes feature available in cond-expand forms.

--

Specifies that there are no more options.  If there are more arguments after this, they are taken as script file name and its arguments.

Environment

GAUCHE_LOAD_PATH
A colon separated list of the load paths.

The paths are appended before the system default load paths.

GAUCHE_DYNLOAD_PATH
A colon separated list of the load paths for dynamically loaded

objects. The paths are appended before the system default load paths.

Authors

Shiro Kawai (shiro @ acm . org)

See Also

gauche-config(1)

Gauche Scheme script engine:
http://practical-scheme.net/gauche/

For the information about Scheme language, see
http://www.schemers.org/

Referenced By

gauche-config(1).

Gauche 0.9.4 Gauche Commands