rpm/scripts/brp-compress

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#!/bin/sh
# If using normal root, avoid changing anything.
if [ -z "$RPM_BUILD_ROOT" ] || [ "$RPM_BUILD_ROOT" = "/" ]; then
exit 0
fi
PREFIX=${1:-/usr}
cd "$RPM_BUILD_ROOT"
# Compress man pages
COMPRESS=${COMPRESS:-gzip -9 -n}
COMPRESS_EXT=${COMPRESS_EXT:-.gz}
for d in .${PREFIX}/man/man* .${PREFIX}/man/*/man* .${PREFIX}/info \
.${PREFIX}/share/man/man* .${PREFIX}/share/man/*/man* \
.${PREFIX}/share/info .${PREFIX}/kerberos/man \
.${PREFIX}/X11R6/man/man* .${PREFIX}/lib/perl5/man/man* \
.${PREFIX}/share/doc/*/man/man* .${PREFIX}/lib/*/man/man* \
.${PREFIX}/share/fish/man/man*
do
[ -d $d ] || continue
find $d -type f ! -name dir -print0 |
while IFS= read -r -d '' f; do
[ -f "$f" ] || continue
case "$f" in
*.gz|*.Z) gunzip -f "$f"; b=`echo "$f" | sed -e 's/\.\(gz\|Z\)$//'`;;
*.bz2) bunzip2 -f "$f"; b=`echo "$f" | sed -e 's/\.bz2$//'`;;
*.xz|*.lzma) unxz -f "$f"; b=`echo "$f" | sed -e 's/\.\(xz\|lzma\)$//'`;;
*.zst|*.zstd) unzstd -f --rm $f; b=`echo "$f" | sed -e 's/\.\(zst\|zstd\)$//'`;;
*) b="$f";;
esac
$COMPRESS "$b" </dev/null 2>/dev/null || {
inode=`ls -i "$b" | awk '{ print $1 }'`
others="`find $d -type f -inum $inode`"
if [ -n "$others" ]; then
for afile in $others ; do
[ "$afile" != "$b" ] && rm -f $afile
done
$COMPRESS -f "$b"
for afile in $others ; do
[ "$afile" != "$b" ] && ln "$b$COMPRESS_EXT" "$afile$COMPRESS_EXT"
done
else
$COMPRESS -f "$b"
fi
}
done
find $d -type l -print0 |
while IFS= read -r -d '' f; do
l=`ls -l $f | sed -e 's/.* -> //' -e 's/\.\(gz\|Z\|bz2\|xz\|lzma\|zst\|zstd\)$//'`
rm -f $f
b=`echo $f | sed -e 's/\.\(gz\|Z\|bz2\|xz\|lzma\|zst\|zstd\)$//'`
ln -sf "$l$COMPRESS_EXT" "$b$COMPRESS_EXT"
done
done