* geesh/environment.scm (<environment>): Add an 'arguments' field.
(make-environment): Add an optional 'arguments' parameter.
(with-environment-arguments): New public function.
.dir-locals.el: Indent it nicely.
* geesh/environment.scm (<environment>): Add a 'functions' field.
(make-environment): Initialize it to the empty list.
(environment-function-ref): New public function.
(define-environment-function!): New public function.
Instead of using an environment variable named '?', we will use a
special environment field called 'status'. This lets us get rid of a
lot of number-string conversions (since an environment variable has to
have a string value).
* geesh/environment.scm (<environment>): Add a 'status' field.
(make-environment): Set it to 0 by default.
* geesh/repl.scm (run-repl): Use new field in place of '?' variable.
* geesh/shell.scm (exec-utility, sh:and, sh:exec-let, sh:for, sh:not,
sh:or, sh:pipeline, sh:subshell, sh:substitute-command): Ditto.
* geesh/word.scm (parameter-ref): New function that handles both
special parameters (e.g., '?') and variables.
(parameter-ref*): Like 'var-ref*', but for 'parameter-ref'.
(word->qword): Replace 'var-ref' and 'var-ref*' with 'parameter-ref'
and 'parameter-ref*' respectively.
* geesh/shell.scm (swap-and-shift-pairs): New function.
(make-pipes): New function.
(plumb): New function.
(sh:pipeline): New public function.
* tests/shell.scm: Test it.
Before, we were using raw file descriptors. This worked okay, but
there was interference caused by port buffering. Doing everything at
the port level avoids this problem, and has the added benefit of
allowing one to use the 'current-*-port' parameters with the shell
module (in a limited way, but there is room for improvement).
* geesh/shell.scm (*fd-count*): New variable.
(fd->current-port): New function.
(install-current-ports!): New function.
(exec-utility): Use it to set up file descriptors.
(save-and-install-redirect!): Rename this...
(save-and-set-redirect): ...to this and modify the current port
parameters instead of raw file descriptors.
(restore-saved-fdes!): Rename this...
(restore-saved-port): ...to this.
(sh:with-redirects): Adjust to use the renamed functions.
(sh:substitute-command): Parameterize the current ports directly
instead of using redirects.
* tests/shell.scm: Add tests to check if port buffers cause problems.
* geesh/shell.scm (%subshell): New function factored out from 'subshell'.
(subshell): Use it.
(substitute-command): New public function.
* tests/shell.scm: Test it.
* .dir-locals.el: Indent it nicely.
* gash/commands/tr.scm: New file.
* gash/bournish-commands.scm: Use it.
* build-aux/build-guile.sh: Compile it.
* configure: Wrap it.
* .gitignore: Ignore it.
* gash/commands/mv.scm: New file.
* gash/bournish-commands.scm: Use it.
* build-aux/build-guile.sh: Compile it.
* configure: Wrap it.
* .gitignore: Ignore it.
* geesh/shell.scm (save-and-install-redirect!): New function.
(restore-saved-fdes!): New function.
(with-redirects): New public function.
* tests/shell.scm: Test it.
* .dir-locals.el: Indent it nicely.
Timothy Sample
Jan Nieuwenhuizen