| # =========================================================================== |
| # https://www.gnu.org/software/autoconf-archive/ax_normalize_path.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_NORMALIZE_PATH(VARNAME, [REFERENCE_STRING]) |
| # |
| # DESCRIPTION |
| # |
| # Perform some cleanups on the value of $VARNAME (interpreted as a path): |
| # |
| # - empty paths are changed to '.' |
| # - trailing slashes are removed |
| # - repeated slashes are squeezed except a leading doubled slash '//' |
| # (which might indicate a networked disk on some OS). |
| # |
| # REFERENCE_STRING is used to turn '/' into '\' and vice-versa: if |
| # REFERENCE_STRING contains some backslashes, all slashes and backslashes |
| # are turned into backslashes, otherwise they are all turned into slashes. |
| # |
| # This makes processing of DOS filenames quite easier, because you can |
| # turn a filename to the Unix notation, make your processing, and turn it |
| # back to original notation. |
| # |
| # filename='A:\FOO\\BAR\' |
| # old_filename="$filename" |
| # # Switch to the unix notation |
| # AX_NORMALIZE_PATH([filename], ["/"]) |
| # # now we have $filename = 'A:/FOO/BAR' and we can process it as if |
| # # it was a Unix path. For instance let's say that you want |
| # # to append '/subpath': |
| # filename="$filename/subpath" |
| # # finally switch back to the original notation |
| # AX_NORMALIZE_PATH([filename], ["$old_filename"]) |
| # # now $filename equals to 'A:\FOO\BAR\subpath' |
| # |
| # One good reason to make all path processing with the unix convention is |
| # that backslashes have a special meaning in many cases. For instance |
| # |
| # expr 'A:\FOO' : 'A:\Foo' |
| # |
| # will return 0 because the second argument is a regex in which |
| # backslashes have to be backslashed. In other words, to have the two |
| # strings to match you should write this instead: |
| # |
| # expr 'A:\Foo' : 'A:\\Foo' |
| # |
| # Such behavior makes DOS filenames extremely unpleasant to work with. So |
| # temporary turn your paths to the Unix notation, and revert them to the |
| # original notation after the processing. See the macro |
| # AX_COMPUTE_RELATIVE_PATHS for a concrete example of this. |
| # |
| # REFERENCE_STRING defaults to $VARIABLE, this means that slashes will be |
| # converted to backslashes if $VARIABLE already contains some backslashes |
| # (see $thirddir below). |
| # |
| # firstdir='/usr/local//share' |
| # seconddir='C:\Program Files\\' |
| # thirddir='C:\home/usr/' |
| # AX_NORMALIZE_PATH([firstdir]) |
| # AX_NORMALIZE_PATH([seconddir]) |
| # AX_NORMALIZE_PATH([thirddir]) |
| # # $firstdir = '/usr/local/share' |
| # # $seconddir = 'C:\Program Files' |
| # # $thirddir = 'C:\home\usr' |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2008 Alexandre Duret-Lutz <adl@gnu.org> |
| # |
| # This program is free software; you can redistribute it and/or modify it |
| # under the terms of the GNU General Public License as published by the |
| # Free Software Foundation; either version 2 of the License, or (at your |
| # option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, but |
| # WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| # Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License along |
| # with this program. If not, see <https://www.gnu.org/licenses/>. |
| # |
| # As a special exception, the respective Autoconf Macro's copyright owner |
| # gives unlimited permission to copy, distribute and modify the configure |
| # scripts that are the output of Autoconf when processing the Macro. You |
| # need not follow the terms of the GNU General Public License when using |
| # or distributing such scripts, even though portions of the text of the |
| # Macro appear in them. The GNU General Public License (GPL) does govern |
| # all other use of the material that constitutes the Autoconf Macro. |
| # |
| # This special exception to the GPL applies to versions of the Autoconf |
| # Macro released by the Autoconf Archive. When you make and distribute a |
| # modified version of the Autoconf Macro, you may extend this special |
| # exception to the GPL to apply to your modified version as well. |
| |
| #serial 8 |
| |
| AU_ALIAS([ADL_NORMALIZE_PATH], [AX_NORMALIZE_PATH]) |
| AC_DEFUN([AX_NORMALIZE_PATH], |
| [case ":[$]$1:" in |
| # change empty paths to '.' |
| ::) $1='.' ;; |
| # strip trailing slashes |
| :*[[\\/]]:) $1=`echo "[$]$1" | sed 's,[[\\/]]*[$],,'` ;; |
| :*:) ;; |
| esac |
| # squeeze repeated slashes |
| case ifelse($2,,"[$]$1",$2) in |
| # if the path contains any backslashes, turn slashes into backslashes |
| *\\*) $1=`echo "[$]$1" | sed 's,\(.\)[[\\/]][[\\/]]*,\1\\\\,g'` ;; |
| # if the path contains slashes, also turn backslashes into slashes |
| *) $1=`echo "[$]$1" | sed 's,\(.\)[[\\/]][[\\/]]*,\1/,g'` ;; |
| esac]) |