4911a10a4e
XZ compresses significantly better than bzip2. Here are the compression ratios and execution times (using 4 cores in parallel) on my /var/run/current-system (3.1 GiB): bzip2: total compressed size 849.56 MiB, 30.8% [2m08] xz -6: total compressed size 641.84 MiB, 23.4% [6m53] xz -7: total compressed size 621.82 MiB, 22.6% [7m19] xz -8: total compressed size 599.33 MiB, 21.8% [7m18] xz -9: total compressed size 588.18 MiB, 21.4% [7m40] Note that compression takes much longer. More importantly, however, decompression is much faster: bzip2: 1m47.274s xz -6: 0m55.446s xz -7: 0m54.119s xz -8: 0m52.388s xz -9: 0m51.842s The only downside to using -9 is that decompression takes a fair amount (~65 MB) of memory.
30 lines
810 B
Perl
30 lines
810 B
Perl
package Nix::Config;
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$binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@";
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$libexecDir = $ENV{"NIX_LIBEXEC_DIR"} || "@libexecdir@";
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$stateDir = $ENV{"NIX_STATE_DIR"} || "@localstatedir@/nix";
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$manifestDir = $ENV{"NIX_MANIFESTS_DIR"} || "@localstatedir@/nix/manifests";
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$logDir = $ENV{"NIX_LOG_DIR"} || "@localstatedir@/log/nix";
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$confDir = $ENV{"NIX_CONF_DIR"} || "@sysconfdir@/nix";
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$bzip2 = "@bzip2@";
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$xz = "@xz@";
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$curl = "@curl@";
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$useBindings = "@perlbindings@" eq "yes";
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sub readConfig {
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my %config;
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my $config = "@sysconfdir@/nix/nix.conf";
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return unless -f $config;
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open CONFIG, "<$config" or die "cannot open `$config'";
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while (<CONFIG>) {
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/^\s*([\w|-]+)\s*=\s*(.*)$/ or next;
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$config{$1} = $2;
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print "|$1| -> |$2|\n";
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}
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close CONFIG;
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}
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return 1;
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