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* Build hooks: use nix-store --import. This prevents a redundant

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scan for runtime dependencies (i.e. the local machine shouldn't do a
  scan that the remote machine has already done).  Also pipe directly
  into `nix-store --import': don't use a temporary file.
This commit is contained in:
Eelco Dolstra 2009-02-02 17:24:10 +00:00
parent 6f8c96d123
commit b682fae9d9
3 changed files with 29 additions and 22 deletions
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15
scripts/build-remote.pl.in
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@ -192,7 +192,7 @@ my $buildFlags = "--max-silent-time $maxSilentTime";
# connection dies. Without it, the remote process might continue to
# run indefinitely (that is, until it next tries to write to
# stdout/stderr).
if (system("ssh -tt $sshOpts $hostName 'nix-store -rvvK $buildFlags $drvPath'") != 0) {
if (system("ssh -tt $sshOpts $hostName 'nix-store --realise -K $buildFlags $drvPath > /dev/null'") != 0) {
# If we couldn't run ssh or there was an ssh problem (indicated by
# exit code 255), then we return exit code 1; otherwise we assume
# that the builder failed, which we indicated to Nix using exit
@ -209,17 +209,6 @@ foreach my $output (split '\n', $outputs) {
my $maybeSignRemote = "";
$maybeSignRemote = "--sign" if $UID != 0;
system("ssh $sshOpts $hostName 'nix-store --export $maybeSignRemote $output' > dump") == 0
system("ssh $sshOpts $hostName 'nix-store --export $maybeSignRemote $output' | @bindir@/nix-store --import > /dev/null") == 0
or die "cannot copy $output from $hostName: $?";
# This doesn't work yet, since the caller has a lock on the output
# path. We should move towards lock-free invocation of build
# hooks and substitutes.
#system("nix-store --import < dump") == 0
# or die "cannot import $output: $?";
# Hack: skip the first 8 bytes (the nix-store --export next
# archive marker). The archive follows.
system("(dd bs=1 count=8 of=/dev/null && cat) < dump | nix-store --restore $output") == 0
or die "cannot restore $output: $?";
}