setup: introduce the discover_git_directory() function

diff --git a/contrib/update-unicode/update_unicode.sh b/contrib/update-unicode/update_unicode.sh
index ff664ec953721e6d207b09e78e2eec7b3b30b2d5..e05db92d3fb255d09a1844ceb6428b6279e8eea9 100755 (executable)
--- a/contrib/update-unicode/update_unicode.sh
+++ b/contrib/update-unicode/update_unicode.sh
@@ -8,14 +8,11 @@
 cd "$(dirname "$0")"
 UNICODEWIDTH_H=$(git rev-parse --show-toplevel)/unicode_width.h
 
-if ! test -f UnicodeData.txt; then
-       wget http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt
-fi &&
-if ! test -f EastAsianWidth.txt; then
-       wget http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt
-fi &&
+wget -N http://www.unicode.org/Public/UCD/latest/ucd/UnicodeData.txt \
+       http://www.unicode.org/Public/UCD/latest/ucd/EastAsianWidth.txt &&
 if ! test -d uniset; then
-       git clone https://github.com/depp/uniset.git
+       git clone https://github.com/depp/uniset.git &&
+       ( cd uniset && git checkout 4b186196dd )
 fi &&
 (
        cd uniset &&
@@ -28,8 +25,7 @@ fi &&
 UNICODE_DIR=. && export UNICODE_DIR &&
 cat >$UNICODEWIDTH_H <<-EOF
 static const struct interval zero_width[] = {
-       $(uniset/uniset --32 cat:Me,Mn,Cf + U+1160..U+11FF - U+00AD |
-         grep -v plane)
+       $(uniset/uniset --32 cat:Me,Mn,Cf + U+1160..U+11FF - U+00AD)
 };
 static const struct interval double_width[] = {
        $(uniset/uniset --32 eaw:F,W)