lix/corepkgs/config.nix.in

let
  fromEnv = var: def:
    let val = builtins.getEnv var; in
    if val != "" then val else def;
in {
  perl = "@perl@";
  shell = "@bash@";
  coreutils = "@coreutils@";
  bzip2 = "@bzip2@";
  gzip = "@gzip@";
  xz = "@xz@";
  tar = "@tar@";
  tarFlags = "@tarFlags@";
  tr = "@tr@";
  curl = "@curl@";
  nixBinDir = fromEnv "NIX_BIN_DIR" "@bindir@";
}
* Forgot to add. 2012-01-03 09:19:40 +00:00			`let`
			`fromEnv = var: def:`
			`let val = builtins.getEnv var; in`
			`if val != "" then val else def;`
			`in {`
			`perl = "@perl@";`
Add support for ‘make installcheck’ 2013-11-25 17:47:03 +00:00			`shell = "@bash@";`
* Forgot to add. 2012-01-03 09:19:40 +00:00			`coreutils = "@coreutils@";`
Use XZ compression in binary caches 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. 2012-06-29 18:26:31 +00:00			`bzip2 = "@bzip2@";`
Add gzip support for channel unpacking 2013-05-14 13:10:14 +00:00			`gzip = "@gzip@";`
Use XZ compression in binary caches 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. 2012-06-29 18:26:31 +00:00			`xz = "@xz@";`
* Forgot to add. 2012-01-03 09:19:40 +00:00			`tar = "@tar@";`
Use a GNU tar flag to shut up warnings about implausibly old timestamp 2012-08-01 20:42:51 +00:00			`tarFlags = "@tarFlags@";`
* Forgot to add. 2012-01-03 09:19:40 +00:00			`tr = "@tr@";`
corepkgs/config.nix.in: We'll need curl 2012-07-08 14:22:26 +00:00			`curl = "@curl@";`
* Forgot to add. 2012-01-03 09:19:40 +00:00			`nixBinDir = fromEnv "NIX_BIN_DIR" "@bindir@";`
			`}`