unionfs: Add mount helper (mount.unionfs-fuse)
This makes it possible to mount unionfs directly with mount or fstab. Example fstab entry: none /mnt/union unionf-fuse allow-other,dirs=/source1=RW,/source2=RW Note, the dirs= option need to be the last option, due to limitations in the mount helper provided by unionfs-fuse. Maybe we should write a better helper ourselves. Also, you need to specify your branches as dirs= option, NOT as the device, since the latest version of libmount always interprets "=" characters in the device name as a tag (like LABEL, UUID etc) and will try to resolve the tag before calling the mount helper. This will of course not succeed and the mount will fail.
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@ -5,12 +5,24 @@ stdenv.mkDerivation rec {
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src = fetchurl {
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url = "http://podgorny.cz/unionfs-fuse/releases/${name}.tar.xz";
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sha256 = "0qpnr4czgc62vsfnmv933w62nq3xwcbnvqch72qakfgca75rsp4d";
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};
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buildInputs = [ cmake fuse ];
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# Put the unionfs mount helper in place as mount.unionfs-fuse. This makes it
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# possible to do:
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# mount -t unionfs-fuse none /dest -o dirs=/source1=RW,/source2=RO
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#
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# This must be done in preConfigure because the build process removes
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# helper from the source directory during the build.
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preConfigure = ''
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ensureDir $out/sbin
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cp -a mount.unionfs $out/sbin/mount.unionfs-fuse
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substituteInPlace $out/sbin/mount.unionfs-fuse --replace mount.fuse ${fuse}/sbin/mount.fuse
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substituteInPlace $out/sbin/mount.unionfs-fuse --replace unionfs $out/bin/unionfs
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'';
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meta = {
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description = "FUSE UnionFS implementation";
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homepage = http://podgorny.cz/moin/UnionFsFuse;
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