Ava Affine
6d2925984f
* split into multi member workspace in preparation for a no_std core * env and posix stuff neatly crammed into a seperate shell project * some pokes at interactive-devel.f * updated ci * removed 'l' shortcut for 'load' and update docs * remove out of date readme content * updated tests * more sensible cond implementation and extra tests * substr stdlib function with tests Signed-off-by: Ava Affine <ava@sunnypup.io>
57 lines
2.4 KiB
Forth
57 lines
2.4 KiB
Forth
#!/bin/flesh
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;; Flesh: Flexible Shell
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;; Copyright (C) 2021 Ava Affine
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;;
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;; This program is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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;; GENBIND
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(def gen-binding
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"Takes two arguments: a symbol (use quote) and a string token
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The symbol should coorespond to a binary on the path (else command will fail)
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The string token is taken to be an argument to that command
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A lambda is then made which accepts a list of additional arguments.
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When called, the resulting function will construct and execute a call to load
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The point is to be able to autogenerate bindings for shell commands.
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Example: (eval ((gen-binding (q ls) '-l') ('-a')))
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Or: (def gcommit 'use: (gcommit my-message)'
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(lambda (arg) (eval ((gen-binding 'git' 'commit') ('-s' '-m' arg)))))
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Or, a more advanced use:
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(def -git-opts 'all subcommands for guix'
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('add' 'push' 'stash'))
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;; define global functions for each subcommand
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(let ((gx-iter (pop -git-opts)))
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(while (gt? (len gx-iter) 1)
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(let ((subc (car gx-iter))
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(rest (cdr gx-iter)))
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(def (concat 'g-' subc)
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'subcommand binding for git. takes a list of args'
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(lambda (args) (eval ((gen-binding 'git' subc) args))))
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(set (q gx-iter) (pop rest)))))"
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(sym subcommand)
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(let ((lam ((q lambda)
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(cons (q args))
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(cons let (((q func-call) (cons cons (q l) (cons q sym) subcommand))
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((q arg-iter) (cons pop (q args))))
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(cons while (cons gt? (cons len (q arg-iter)) 1)
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(cons set (cons q (q func-call)) (cons cons (q func-call) (cons car (q arg-iter))))
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(cons set (cons q (q arg-iter)) (cons pop (cons cdr (q arg-iter)))))
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(cons echo "+ " (cons cdr (cons pop (q func-call))))
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(cons eval (q func-call))))))
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(eval lam)))
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