NAME

gosh - a Scheme script interpreter

SYNOPSIS

gosh [-bhiqV] [-I path ] [-A path ] [-u module ] [-l file ] [-L file ] [-e expr ] [-E expr ] [-m module ] [-f flag ] [-F feature ] [-p type ] [-r standard ] [--] [ 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.
-h: Print help message to stdout and exit with 0.
-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.
-mmodule: When the script file is given, this option specifies the name of the module in which the "main" procedure is defined. The default is "user".
-ptype: Turns on the profiler. Type can be either 'time' or 'load'.
-rstandard: Starts gosh with the default environment defined in RnRS, where n is determined by standard. Currently, only 7 is the valid value of standard.
-vversion: If version is not the running Gauche's version, but the specified verision is installed in the system, execute taht version's gosh instead. This is useful when you want to invoke a specific version of Gauche. The version must be 0.9.6 or later.
-fflag: Sets various flags. case-fold use case-insensitive reader (as in R5RS) load-verbose report while loading files include-verbose report while including files no-inline don't inline primitive procedures and constants (combined no-inline-globals, no-inline-locals, no-inline-constants and no-inline-setters.) no-inline-globals don't inline global procedures. no-inline-locals don't inline local procedures. no-inline-constants don't inline constants. no-inline-setters don't inline setters. no-post-inline-pass don't run post-inline optimization pass. no-lambda-lifting-pass don't run lambda lifting optimization pass. no-post-inline-pass don't run post-inline optimization pass. no-source-info don't retain source information. read-edit enable input editing mode, if terminal supports it. no-read-edit disable input editing mode. safe-string-cursors performs extra validation for use of string cursors. warn-legacy-syntax print warning when legacy Gauche syntax is encountered. test assume being run in the build tree; tries to load files from the current build instead of installation directories. Useful to test the build without installation.
-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