/ 
BATsh-0.01
/ BATsh

NAME

BATsh - Bilingual Shell: cmd.exe and bash in one script (self-contained)

VERSION

Version 0.01

SYNOPSIS

use BATsh;

BATsh->run('myscript.batsh');
BATsh->run_string('echo hello from sh');
BATsh->repl();

DESCRIPTION

BATsh is a self-contained bilingual shell interpreter written in pure Perl. It implements both the cmd.exe command set and the sh/bash command set entirely in Perl -- no external cmd.exe, bash, or sh is required.

Scripts are divided into CMD sections (uppercase first token) and SH sections (lowercase first token). Both sections share a common variable store via BATsh::Env, so variables set in a CMD section are immediately visible in the next SH section and vice versa.

CMD MODE

Any line whose first token is all uppercase (A-Z, 0-9, path chars) is a CMD line. CMD sections are executed by BATsh::CMD, which implements:

ECHO, @ECHO OFF/ON
SET VAR=value, SET /A expr
IF "A"=="B" ... ELSE ..., IF EXIST, IF DEFINED, IF ERRORLEVEL
FOR %%V IN (list) DO ..., FOR /L %%V IN (s,step,e) DO ...
GOTO :label, :label
CALL :label [args], CALL file.batsh
SETLOCAL, ENDLOCAL
CD, DIR, COPY, DEL, MOVE, MKDIR, RMDIR, REN, TYPE
PAUSE, EXIT, CLS, TITLE, VER, PUSHD, POPD

SH MODE

Any line whose first token contains a lowercase letter is a SH line. SH sections are executed by BATsh::SH, which implements:

VAR=value, export VAR=value, unset VAR
echo, printf
if/then/elif/else/fi
for VAR in list; do ... done
while condition; do ... done
until condition; do ... done
case $var in pattern) ... ;; esac
test / [ ... ]  (file tests, string, integer comparisons)
cd, pwd, exit, true, false, :, read, shift
$(( arithmetic )), $( command substitution )
${VAR}, ${VAR:-default}, ${VAR:=default}
source / . file

REQUIREMENTS

Perl 5.005_03 or later. Core modules only. No external shell required.

BUGS AND LIMITATIONS

The built-in CMD interpreter does not support all cmd.exe extensions (e.g. FOR /F with complex token options, delayed expansion with !VAR!).

The built-in SH interpreter does not support pipelines (|), redirection (> >> <), background execution (&), or here-documents (<<).

Section boundary detection is token-based (uppercase vs. lowercase first token). Mixed-case first tokens are treated as SH.

Please report bugs via the issue tracker: https://github.com/ina-cpan/BATsh/issues

SEE ALSO

BATsh::CMD, BATsh::SH, BATsh::Env

AUTHOR

INABA Hitoshi <ina@cpan.org>

LICENSE

This software is free software; you can redistribute it and/or modify it under the same terms as Perl itself.