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|
;;; Gash -- Guile As SHell
;;; Copyright © 2016, 2017, 2018 R.E.W. van Beusekom <rutger.van.beusekom@gmail.com>
;;; Copyright © 2018, 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2019 Timothy Sample <samplet@ngyro.com>
;;;
;;; This file is part of Gash.
;;;
;;; Gash is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation, either version 3 of the License, or
;;; (at your option) any later version.
;;;
;;; Gash is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Gash. If not, see <http://www.gnu.org/licenses/>.
* variable-not-or
:script:
#+begin_src sh
foo=baz
echo ${foo-bar}
#+end_src
:stdout:
#+begin_example
baz
#+end_example
* variable-or-doublequote
:script:
#+begin_src sh
unset CPPFLAGS
CPPFLAGS=${CPPFLAGS-"
-I ${srcdest}src
"}
echo $CPPFLAGS
#+end_src
:stdout:
#+begin_example
-I src
#+end_example
* variable-or-empty
:script:
#+begin_src sh
echo ${bindir-}
#+end_src
:stdout:
#+begin_example
#+end_example
* variable-or
:script:
#+begin_src sh
echo ${foo-bar}
#+end_src
:stdout:
#+begin_example
bar
#+end_example
* variable-or-slash
:script:
#+begin_src sh
echo ${foo-bar/}
#+end_src
* variable-or-variable
:script:
#+begin_src sh
prefix=/usr
echo ${bindir-$prefix/bin}
#+end_src
:stdout:
#+begin_example
/usr/bin
#+end_example
|
