nixpkgs/pkgs/build-support/setup-hooks/compress-man-pages.sh

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fixupOutputHooks+=('if [ -z "$dontGzipMan" ]; then compressManPages "$prefix"; fi')
compressManPages() {
local dir="$1"
echo "gzipping man pages in $dir"
GLOBIGNORE=.:..:*.gz:*.bz2
for f in "$dir"/share/man/*/* "$dir"/share/man/*/*/*; do
if [ -f "$f" -a ! -L "$f" ]; then
if gzip -c -n "$f" > "$f".gz; then
rm "$f"
else
rm "$f".gz
fi
fi
done
for f in "$dir"/share/man/*/* "$dir"/share/man/*/*/*; do
if [ -L "$f" -a -f `readlink -f "$f"`.gz ]; then
ln -sf `readlink "$f"`.gz "$f".gz && rm "$f"
fi
done
unset GLOBIGNORE
}