81 lines
1.6 KiB
Org Mode
81 lines
1.6 KiB
Org Mode
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;;; Gash -- Guile As SHell
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;;; Copyright © 2016, 2017, 2018 R.E.W. van Beusekom <rutger.van.beusekom@gmail.com>
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;;; Copyright © 2018, 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
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;;;
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;;; This file is part of Gash.
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;;;
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;;; Gash 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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;;; Gash 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 Gash. If not, see <http://www.gnu.org/licenses/>.
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* variable-not-or
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:script:
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#+begin_src sh
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foo=baz
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echo ${foo-bar}
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#+end_src
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:stdout:
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#+begin_example
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baz
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#+end_example
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* variable-or-doublequote
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:script:
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#+begin_src sh
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CPPFLAGS=${CPPFLAGS-"
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-I ${srcdest}src
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"}
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echo $CPPFLAGS
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#+end_src
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:stdout:
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#+begin_example
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-I src
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#+end_example
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* variable-or-empty
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:script:
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#+begin_src sh
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echo ${bindir-}
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#+end_src
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:stdout:
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#+begin_example
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#+end_example
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* variable-or
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:script:
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#+begin_src sh
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echo ${foo-bar}
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#+end_src
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:stdout:
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#+begin_example
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bar
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#+end_example
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* variable-or-slash
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:script:
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#+begin_src sh
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echo ${foo-bar/}
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#+end_src
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* variable-or-variable
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:script:
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#+begin_src sh
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prefix=/usr
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echo ${bindir-$prefix/bin}
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#+end_src
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:stdout:
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#+begin_example
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/usr/bin
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#+end_example
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