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|
#! @shell@
WORKING_DIRECTORY=$(mktemp -d "${TMPDIR:-/tmp}"/nix-reduce-build-XXXXXX);
cd "$WORKING_DIRECTORY";
if test -z "$1" || test "a--help" = "a$1" ; then
echo 'nix-reduce-build (paths or Nix expressions) -- (package sources)' >&2
echo As in: >&2
echo nix-reduce-build /etc/nixos/nixos -- ssh://user@somewhere.nowhere.example.org >&2
echo nix-reduce-build /etc/nixos/nixos -- \\
echo " " \''http://somewhere.nowhere.example.org/nix/nix-http-export.cgi?needed_path='\' >&2
echo " store path name will be added into the end of the URL" >&2
echo nix-reduce-build /etc/nixos/nixos -- file://home/user/nar/ >&2
echo " that should be a directory where gzipped 'nix-store --export' ">&2
echo " files are located (they should have .nar.gz extension)" >&2
echo " Or all together: " >&2
echo -e nix-reduce-build /expr.nix /e2.nix -- \\\\\\\n\
" ssh://a@b.example.com http://n.example.com/get-nar?q= file://nar/" >&2
echo " Also supports best-effort local builds of failing expression set:" >&2
echo "nix-reduce-build /e.nix -- nix-daemon:// nix-self://" >&2
echo " nix-daemon:// builds using daemon"
echo " nix-self:// builds directly using nix-store from current installation" >&2
echo " nix-daemon-fixed:// and nix-self-fixed:// do the same, but only for" >&2;
echo "derivations with specified output hash (sha256, sha1 or md5)." >&2
echo " nix-daemon-substitute:// and nix-self-substitute:// try to substitute" >&2;
echo "maximum amount of paths" >&2;
echo " nix-daemon-build:// and nix-self-build:// try to build (not substitute)" >&2;
echo "maximum amount of paths" >&2;
echo " If no package sources are specified, required paths are listed." >&2;
exit;
fi;
while ! test "$1" = "--" || test "$1" = "" ; do
echo "$1" >> initial; >&2
shift;
done
shift;
echo Will work on $(cat initial | wc -l) targets. >&2
while read ; do
case "$REPLY" in
${NIX_STORE_DIR:-/nix/store}/*)
echo "$REPLY" >> paths; >&2
;;
*)
(
IFS=: ;
nix-instantiate $REPLY >> paths;
);
;;
esac;
done < initial;
echo Proceeding $(cat paths | wc -l) paths. >&2
while read; do
case "$REPLY" in
*.drv)
echo "$REPLY" >> derivers; >&2
;;
*)
nix-store --query --deriver "$REPLY" >>derivers;
;;
esac;
done < paths;
echo Found $(cat derivers | wc -l) derivers. >&2
cat derivers | xargs nix-store --query -R > derivers-closure;
echo Proceeding at most $(cat derivers-closure | wc -l) derivers. >&2
cat derivers-closure | egrep '[.]drv$' | xargs nix-store --query --outputs > wanted-paths;
cat derivers-closure | egrep -v '[.]drv$' >> wanted-paths;
echo Prepared $(cat wanted-paths | wc -l) paths to get. >&2
cat wanted-paths | xargs nix-store --check-validity --print-invalid > needed-paths;
echo We need $(cat needed-paths | wc -l) paths. >&2
egrep '[.]drv$' derivers-closure > critical-derivers;
if test -z "$1" ; then
cat needed-paths;
fi;
refresh_critical_derivers() {
echo "Finding needed derivers..." >&2;
cat critical-derivers | while read; do
if ! (nix-store --query --outputs "$REPLY" | xargs nix-store --check-validity &> /dev/null;); then
echo "$REPLY";
fi;
done > new-critical-derivers;
mv new-critical-derivers critical-derivers;
echo The needed paths are realized by $(cat critical-derivers | wc -l) derivers. >&2
}
build_here() {
cat critical-derivers | while read; do
echo "Realising $REPLY using nix-daemon" >&2
@bindir@/nix-store -r "${REPLY}"
done;
}
try_to_substitute(){
cat needed-paths | while read ; do
echo "Building $REPLY using nix-daemon" >&2
@bindir@/nix-store -r "${NIX_STORE_DIR:-/nix/store}/${REPLY##*/}"
done;
}
for i in "$@"; do
sshHost="${i#ssh://}";
httpHost="${i#http://}";
httpsHost="${i#https://}";
filePath="${i#file:/}";
if [ "$i" != "$sshHost" ]; then
cat needed-paths | while read; do
echo "Getting $REPLY and its closure over ssh" >&2
nix-copy-closure --from "$sshHost" --gzip "$REPLY" </dev/null || true;
done;
elif [ "$i" != "$httpHost" ] || [ "$i" != "$httpsHost" ]; then
cat needed-paths | while read; do
echo "Getting $REPLY over http/https" >&2
curl ${BAD_CERTIFICATE:+-k} -L "$i${REPLY##*/}" | gunzip | nix-store --import;
done;
elif [ "$i" != "$filePath" ] ; then
cat needed-paths | while read; do
echo "Installing $REPLY from file" >&2
gunzip < "$filePath/${REPLY##*/}".nar.gz | nix-store --import;
done;
elif [ "$i" = "nix-daemon://" ] ; then
NIX_REMOTE=daemon try_to_substitute;
refresh_critical_derivers;
NIX_REMOTE=daemon build_here;
elif [ "$i" = "nix-self://" ] ; then
NIX_REMOTE= try_to_substitute;
refresh_critical_derivers;
NIX_REMOTE= build_here;
elif [ "$i" = "nix-daemon-fixed://" ] ; then
refresh_critical_derivers;
cat critical-derivers | while read; do
if egrep '"(md5|sha1|sha256)"' "$REPLY" &>/dev/null; then
echo "Realising $REPLY using nix-daemon" >&2
NIX_REMOTE=daemon @bindir@/nix-store -r "${REPLY}"
fi;
done;
elif [ "$i" = "nix-self-fixed://" ] ; then
refresh_critical_derivers;
cat critical-derivers | while read; do
if egrep '"(md5|sha1|sha256)"' "$REPLY" &>/dev/null; then
echo "Realising $REPLY using direct Nix build" >&2
NIX_REMOTE= @bindir@/nix-store -r "${REPLY}"
fi;
done;
elif [ "$i" = "nix-daemon-substitute://" ] ; then
NIX_REMOTE=daemon try_to_substitute;
elif [ "$i" = "nix-self-substitute://" ] ; then
NIX_REMOTE= try_to_substitute;
elif [ "$i" = "nix-daemon-build://" ] ; then
refresh_critical_derivers;
NIX_REMOTE=daemon build_here;
elif [ "$i" = "nix-self-build://" ] ; then
refresh_critical_derivers;
NIX_REMOTE= build_here;
fi;
mv needed-paths wanted-paths;
cat wanted-paths | xargs nix-store --check-validity --print-invalid > needed-paths;
echo We still need $(cat needed-paths | wc -l) paths. >&2
done;
cd /
rm -r "$WORKING_DIRECTORY"
|
