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author | 2017-05-16 14:51:32 +0200 | |
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committer | 2017-05-16 16:20:45 +0200 | |
commit | 7595afa4d30097c1177b69257118d8ad89a539be (patch) | |
tree | 4bfeadc905c977e45e54a90c42330553b8942e4e /buildtools/relpath.sh | |
parent | ce3d555e43e3795b5d9507fcfc76b7a0a92fd0d6 (diff) |
Imported Upstream version 17.05
Change-Id: Id1e419c5a214e4a18739663b91f0f9a549f1fdc6
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Diffstat (limited to 'buildtools/relpath.sh')
-rwxr-xr-x | buildtools/relpath.sh | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/buildtools/relpath.sh b/buildtools/relpath.sh new file mode 100755 index 00000000..139b7813 --- /dev/null +++ b/buildtools/relpath.sh @@ -0,0 +1,105 @@ +#!/bin/sh + +# BSD LICENSE +# +# Copyright(c) 2010-2014 Intel Corporation. All rights reserved. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in +# the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Intel Corporation nor the names of its +# contributors may be used to endorse or promote products derived +# from this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +# +# print the relative path of $1 from $2 directory +# $1 and $2 MUST be absolute paths +# + +if [ $# -ne 2 ]; then + echo "Bad arguments" + echo "Usage:" + echo " $0 path1 path2" + exit 1 +fi + +# get the real absolute path, derefencing symlinks +ABS1="$(dirname $(readlink -f $1))/$(basename $1)" +ABS2=$(readlink -f $2) + +# remove leading slash +REL1=${ABS1#/} +REL2=${ABS2#/} + +left1=${REL1%%/*} +right1=${REL1#*/} +prev_right1=$REL1 +prev_left1= + +left2=${REL2%%/*} +right2=${REL2#*/} +prev_right2=$REL2 +prev_left2= + +prefix= + +while [ "${right1}" != "" -a "${right2}" != "" ]; do + + if [ "$left1" != "$left2" ]; then + break + fi + + prev_left1=$left1 + left1=$left1/${right1%%/*} + prev_right1=$right1 + right1=${prev_right1#*/} + if [ "$right1" = "$prev_right1" ]; then + right1="" + fi + + prev_left2=$left2 + left2=$left2/${right2%%/*} + prev_right2=$right2 + right2=${prev_right2#*/} + if [ "$right2" = "$prev_right2" ]; then + right2="" + fi +done + +if [ "${left1}" != "${left2}" ]; then + right2=${prev_right2} + right1=${prev_right1} +fi + +while [ "${right2}" != "" ]; do + prefix=${prefix}../ + prev_right2=$right2 + right2=${right2#*/} + if [ "$right2" = "$prev_right2" ]; then + right2="" + fi +done + +echo ${prefix}${right1} + +exit 0 |