diff options
Diffstat (limited to 'third_party/nix/scripts/nix-reduce-build.in')
| -rwxr-xr-x | third_party/nix/scripts/nix-reduce-build.in | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/third_party/nix/scripts/nix-reduce-build.in b/third_party/nix/scripts/nix-reduce-build.in new file mode 100755 index 0000000000..50beb9d10b --- /dev/null +++ b/third_party/nix/scripts/nix-reduce-build.in @@ -0,0 +1,171 @@ +#! @bash@ + +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" |