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Explain why $root_dir needs a complicated calculation

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
This commit is contained in:
Gilles Peskine 2020-04-26 22:31:35 +02:00
parent fc09d27a92
commit 911081efd2
1 changed files with 5 additions and 0 deletions
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5
programs/demo_common.sh
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@ -18,6 +18,10 @@ set -e -u
## $root_dir is the root directory of the Mbed TLS source tree. ## $root_dir is the root directory of the Mbed TLS source tree.
root_dir="${0%/*}" root_dir="${0%/*}"
# Find a nice path to the root directory, avoiding unnecessary "../".
# The code supports demo scripts nested up to 4 levels deep.
# The code works no matter where the demo script is relative to the current
# directory, even if it is called with a relative path.
n=4 # limit the search depth n=4 # limit the search depth
while ! [ -d "$root_dir/programs" ] || ! [ -d "$root_dir/library" ]; do while ! [ -d "$root_dir/programs" ] || ! [ -d "$root_dir/library" ]; do
if [ $n -eq 0 ]; then if [ $n -eq 0 ]; then
@ -35,6 +39,7 @@ while ! [ -d "$root_dir/programs" ] || ! [ -d "$root_dir/library" ]; do
done done
## $programs_dir is the directory containing the sample programs. ## $programs_dir is the directory containing the sample programs.
# Assume an in-tree build.
programs_dir="$root_dir/programs" programs_dir="$root_dir/programs"
## msg LINE... ## msg LINE...