eea786f4e8
- remove the old LGPL license headers from all files in Spack - add SPDX headers to all files - core and most packages are (Apache-2.0 OR MIT) - a very small number of remaining packages are LGPL-2.1-only
28 lines
1.2 KiB
Tcsh
28 lines
1.2 KiB
Tcsh
# Copyright 2013-2018 Lawrence Livermore National Security, LLC and other
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# Spack Project Developers. See the top-level COPYRIGHT file for details.
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#
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# SPDX-License-Identifier: (Apache-2.0 OR MIT)
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########################################################################
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# Prepends directories to path, if they exist.
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# pathadd /path/to/dir # add to PATH
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# or pathadd OTHERPATH /path/to/dir # add to OTHERPATH
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########################################################################
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# If no variable name is supplied, just append to PATH
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# otherwise append to that variable.
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set _pa_varname = PATH;
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set _pa_new_path = $_pa_args[1];
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[ $#_pa_args -gt 1 ] && set _pa_varname = $_pa_args[1] && set _pa_new_path = $_pa_args[2];
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# Check whether the variable is set yet.
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set _pa_old_value = ""
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eval set _pa_set = '$?'$_pa_varname
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[ $_pa_set -eq 1 ] && eval set _pa_old_value='$'$_pa_varname;
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# Do the actual prepending here, if it is a dir and not already in the path
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if ( -d $_pa_new_path && \:$_pa_old_value\: !~ *\:$_pa_new_path\:* ) then
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[ -n "$_pa_old_value" ] && setenv $_pa_varname $_pa_new_path\:$_pa_old_value
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[ -z "$_pa_old_value" ] && setenv $_pa_varname $_pa_new_path
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endif
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unset _pa_args _pa_new_path _pa_old_value _pa_set _pa_varname
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