116 lines
4 KiB
Text
116 lines
4 KiB
Text
#! @shell@
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WORKING_DIRECTORY=$(mktemp -d "${TMPDIR:-/tmp}"/nix-reduce-build-XXXXXX);
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cd "$WORKING_DIRECTORY";
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if test -z "$1" || test "a--help" = "a$1" ; then
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echo 'nix-reduce-build (paths or Nix expressions) -- (package sources)' >&2
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echo As in: >&2
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echo nix-reduce-build /etc/nixos/nixos -- ssh://user@somewhere.nowhere.example.org >&2
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echo nix-reduce-build /etc/nixos/nixos -- \\
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echo " " \''http://somewhere.nowhere.example.org/nix/nix-http-export.cgi?needed_path='\' >&2
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echo " store path name will be added into the end of the URL" >&2
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echo nix-reduce-build /etc/nixos/nixos -- file://home/user/nar/ >&2
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echo " that should be a directory where gzipped 'nix-store --export' ">&2
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echo " files are located (they should have .nar.gz extension)" >&2
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echo " Or all together: " >&2
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echo -e nix-reduce-build /expr.nix /e2.nix -- \\\\\\\n\
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" ssh://a@b.example.com http://n.example.com/get-nar?q= file://nar/" >&2
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echo " Also supports best-effort local builds of failing expression set:" >&2
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echo "nix-reduce-build /e.nix -- nix-daemon:// nix-self://" >&2
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echo " nix-daemon:// builds using daemon"
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echo " nix-self:// builds directly using nix-store from current installation" >&2
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exit;
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fi;
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while ! test "$1" = "--" || test "$1" = "" ; do
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echo "$1" >> initial; >&2
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shift;
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done
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shift;
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echo Will work on $(cat initial | wc -l) targets. >&2
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while read ; do
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case "$REPLY" in
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${NIX_STORE_DIR:-/nix/store}/*)
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echo "$REPLY" >> paths; >&2
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;;
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*)
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nix-instantiate "$REPLY" >> paths;
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;;
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esac;
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done < initial;
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echo Proceeding $(cat paths | wc -l) paths. >&2
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while read; do
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case "$REPLY" in
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*.drv)
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echo "$REPLY" >> derivers; >&2
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;;
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*)
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nix-store --query --deriver "$REPLY" >>derivers;
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;;
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esac;
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done < paths;
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echo Found $(cat derivers | wc -l) derivers. >&2
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cat derivers | xargs nix-store --query -R > derivers-closure;
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echo Proceeding at most $(cat derivers-closure | wc -l) derivers. >&2
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cat derivers-closure | egrep '[.]drv$' | xargs nix-store --query --outputs > wanted-paths;
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cat derivers-closure | egrep -v '[.]drv$' >> wanted-paths;
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echo Prepared $(cat wanted-paths | wc -l) paths to get. >&2
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cat wanted-paths | xargs nix-store --check-validity --print-invalid > needed-paths;
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echo We need $(cat needed-paths | wc -l) paths. >&2
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if test -z "$1" ; then
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cat needed-paths;
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fi;
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for i in "$@"; do
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sshHost="${i#ssh://}";
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httpHost="${i#http://}";
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httpsHost="${i#https://}";
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filePath="${i#file:/}";
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if [ "$i" != "$sshHost" ]; then
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cat needed-paths | while read; do
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echo "Getting $REPLY and its closure over ssh" >&2
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nix-copy-closure --from "$sshHost" --gzip "$REPLY" </dev/null || true;
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done;
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elif [ "$i" != "$httpHost" ] || [ "$i" != "$httpsHost" ]; then
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cat needed-paths | while read; do
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echo "Getting $REPLY over http/https" >&2
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curl ${BAD_CERTIFICATE:+-k} -L "$i${REPLY##*/}" | gunzip | nix-store --import;
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done;
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elif [ "$i" != "$filePath" ] ; then
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cat needed-paths | while read; do
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echo "Installing $REPLY from file" >&2
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gunzip < "$filePath/${REPLY##*/}".nar.gz | nix-store --import;
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done;
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elif [ "$i" = "nix-daemon://" ] ; then
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cat needed-paths | while read ; do
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echo "Building $REPLY using nix-daemon" >&2
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NIX_REMOTE=daemon @bindir@/nix-store -r "${NIX_STORE_DIR:-/nix/store}/${REPLY##*/}"
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done;
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cat derivers-closure | while read; do
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echo "Realising $REPLY using nix-daemon" >&2
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NIX_REMOTE=daemon @bindir@/nix-store -r "${REPLY}"
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done;
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elif [ "$i" = "nix-self://" ] ; then
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cat needed-paths | while read ; do
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echo "Building $REPLY using direct Nix build" >&2
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NIX_REMOTE= @bindir@/nix-store -r "${NIX_STORE_DIR:-/nix/store}/${REPLY##*/}"
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done;
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cat derivers-closure | while read; do
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echo "Realising $REPLY using direct Nix build" >&2
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NIX_REMOTE= @bindir@/nix-store -r "${REPLY}"
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done;
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fi;
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mv needed-paths wanted-paths;
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cat wanted-paths | xargs nix-store --check-validity --print-invalid > needed-paths;
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echo We still need $(cat needed-paths | wc -l) paths. >&2
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done;
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cd /
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rm -r "$WORKING_DIRECTORY"
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