mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-27 16:11:58 +00:00
52 lines
1.6 KiB
Nix
52 lines
1.6 KiB
Nix
{ stdenv, fetchFromGitHub, runtimeShell }:
|
|
|
|
stdenv.mkDerivation {
|
|
pname = "flockit";
|
|
version = "2012-08-11";
|
|
|
|
src = fetchFromGitHub {
|
|
owner = "smerritt";
|
|
repo = "flockit";
|
|
rev = "5c2b2092f8edcc8e3e2eb6ef66c968675dbfa686";
|
|
sha256 = "0vajck9q2677gpn9a4flkyz7mw69ql1647cjwqh834nrcr2b5164";
|
|
};
|
|
|
|
installPhase = ''
|
|
mkdir -p $out/lib $out/bin
|
|
cp ./libflockit.so $out/lib
|
|
|
|
(cat <<EOI
|
|
#!${runtimeShell}
|
|
env LD_PRELOAD="$out/lib/libflockit.so" FLOCKIT_FILE_PREFIX=\$1 \''${@:2}
|
|
EOI
|
|
) > $out/bin/flockit
|
|
chmod +x $out/bin/flockit
|
|
'';
|
|
|
|
meta = with stdenv.lib; {
|
|
description = "LD_PRELOAD shim to add file locking to programs that don't do it (I'm looking at you, rsync!)";
|
|
longDescription = ''
|
|
This library and tool exists solely because rsync doesn't have file locking.
|
|
|
|
It's not used like a normal library; you don't link against it, and you
|
|
don't have to patch your source code to use it. It's inserted between your
|
|
program and its libraries by use of LD_PRELOAD.
|
|
|
|
For example:
|
|
|
|
$ env LD_PRELOAD=$(nix-build -A pkgs.flockit)/lib/libflockit.so FLOCKIT_FILE_PREFIX=test rsync SRC DEST
|
|
|
|
Besides the library a handy executable is provided which can simplify the above to:
|
|
|
|
$ $(nix-build -A pkgs.flockit)/bin/flockit test rsync SRC DEST
|
|
|
|
Also see the following blog post:
|
|
https://www.swiftstack.com/blog/2012/08/15/old-school-monkeypatching/
|
|
'';
|
|
homepage = https://github.com/smerritt/flockit;
|
|
license = licenses.asl20;
|
|
platforms = platforms.linux;
|
|
maintainers = [ maintainers.basvandijk ];
|
|
};
|
|
}
|