--- /dev/null
+count_chunks() {
+ elements="${1//[^\/]}"
+ echo $(( "${#elements}" ))
+}
+
+oldout=$out
+prefix_chunks=$(count_chunks $NIX_STORE)
+
+: ${storepath_length=${#NIX_STORE}}
+: ${storepath_chunks=$prefix_chunks}
+
+if [ "$storepath_chunks" -lt $prefix_chunks ]; then
+ echo "Need to have at least as much path elements as the initial prefix"
+ exit 1
+fi
+
+min_length=$(( ${#NIX_STORE} + 2 * $storepath_chunks - 2 * $prefix_chunks ))
+if [ "$storepath_length" -lt "$min_length" ]; then
+ echo "The storepath length needs to be at least the length of the prefix"
+ exit 1
+fi
+
+if [ "$storepath_chunks" -eq "$prefix_chunks" -a "$storepath_length" -gt "$min_length" ]; then
+ echo "You need at least one more chunk for a non-standard path length"
+ exit 1
+fi
+
+appendOut() {
+ chunk_prefix=$(for (( c=$prefix_chunks ; c < $storepath_chunks ; c++ )); do echo -n "/x"; done)
+ length_prefix=$(for (( c=$(( ${#NIX_STORE} + ${#chunk_prefix} )) ; c < $storepath_length ; c++ )); do echo -n "x"; done)
+ out="$out$chunk_prefix$length_prefix"
+ if [ -n $chunk_prefix -o -n $length_prefix ]; then
+ mkdir -p $(dirname $out)
+ fi
+
+ : ${libc_path=}
+ : ${configureFlags=}
+ configureFlags="${configureFlags//$oldout/$out}"
+ if [ -n "$libc_path" ]; then
+ libc_oldpath=$libc_path/lib
+ libc_newpath=$(cat $libc_path/nix-support/new-out)/lib
+ configureFlags="${configureFlags//$libc_oldpath/$libc_newpath}"
+ fi
+}
+
+addNixSupport() {
+ if [ ! -d $out ]; then
+ return
+ fi
+ mkdir -p $out/nix-support
+ echo $out > $out/nix-support/new-out
+}
+
+overridePlaceholder() {
+function _callImplicitHook {
+ local def="$1"
+ local hookName="$2"
+ if declare -F "$hookName" > /dev/null; then
+ "$hookName"
+ elif type -p "$hookName" > /dev/null; then
+ source "$hookName"
+ elif [ -n "${!hookName:-}" ]; then
+ content="${!hookName}"
+ eval "${content//$oldout/$out}"
+ else
+ return "$def"
+ fi
+}
+}
+
+preHooks+=(appendOut overridePlaceholder)
+
+restoreSingleFile() {
+ if [ "$out" != "$oldout" -a -f $out ]; then
+ cp -a $out ./file
+ rm -rf $oldout
+ cp -a ./file $oldout
+ fi
+}
+
+addSymlinks() {
+ if [ "$out" != "$oldout" -a -d $out ]; then
+ ln -s $out/* $oldout/
+ fi
+}
+
+rename_generic_build() {
+eval "$(echo "orig_genericBuild()"; declare -f genericBuild | tail -n +2)"
+function genericBuild {
+ orig_genericBuild "$@"
+ restoreSingleFile
+ addSymlinks
+ addNixSupport
+}
+}
+
+exitHooks+=(restoreSingleFile addSymlinks addNixSupport)
+postHooks+=(rename_generic_build)