diff options
| author | Eelco Dolstra <edolstra@gmail.com> | 2018-03-28T11·32+0200 |
|---|---|---|
| committer | Eelco Dolstra <edolstra@gmail.com> | 2018-05-30T11·42+0200 |
| commit | 7d21863bb3f3d4c42b273a8648a65bec83fe0b60 (patch) | |
| tree | 252f7d24ef82026ed3ce9c8318c5f1287374581f /src/libutil/util.hh | |
| parent | 5a654fd7dd0bf58470e0a15d451cf36ce0c62beb (diff) | |
Make <nix/fetchurl.nix> run in constant memory
E.g.
nix-build --store ~/my-nix/ -E 'import <nix/fetchurl.nix> { url = https://cache.nixos.org/nar/0nwi996rgq4b914qyx0mv2wq4k80hjac7xilikavagw7kxmn2iiv.nar.xz; sha256 = "0nwi996rgq4b914qyx0mv2wq4k80hjac7xilikavagw7kxmn2iiv"; }'
now runs in 17 MiB (was 70 MiB), while
nix-build --store ~/my-nix/ -E 'import <nix/fetchurl.nix> { url = https://cache.nixos.org/nar/0nwi996rgq4b914qyx0mv2wq4k80hjac7xilikavagw7kxmn2iiv.nar.xz; sha256 = "0d2fxljdih3nc5dqx41hjzic3141ajil94m8kdbpryq569dpsbvb"; unpack = true; }'
runs in 17 MiB (was 346 MiB).
Diffstat (limited to 'src/libutil/util.hh')
| -rw-r--r-- | src/libutil/util.hh | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/libutil/util.hh b/src/libutil/util.hh index af97b76d90..fc25d27758 100644 --- a/src/libutil/util.hh +++ b/src/libutil/util.hh @@ -103,6 +103,8 @@ void readFile(const Path & path, Sink & sink); /* Write a string to a file. */ void writeFile(const Path & path, const string & s, mode_t mode = 0666); +void writeFile(const Path & path, Source & source, mode_t mode = 0666); + /* Read a line from a file descriptor. */ string readLine(int fd); |