lix/tests/filter-source.nix.in

derivation {
  name = "filter";
  system = "@system@";
  builder = "@shell@";
  args = ["-e" "-x" (builtins.toFile "builder" "PATH=@testPath@; ln -s $input $out")];
  input =
    let filter = path: type:
      type != "symlink"
      && baseNameOf path != "foo"
      && !((import ./lang/lib.nix).hasSuffix ".bak" (baseNameOf path));
    in builtins.filterSource filter ./test-tmp/filterin;
}
* New primop builtins.filterSource, which can be used to filter files from a source directory. All files for which a predicate function returns true are copied to the store. Typical example is to leave out the .svn directory: stdenv.mkDerivation { ... src = builtins.filterSource (path: baseNameOf (toString path) != ".svn") ./source-dir; # as opposed to # src = ./source-dir; } This is important because the .svn directory influences the hash in a rather unpredictable and variable way. 2006-12-12 23:05:01 +00:00			`derivation {`
			`name = "filter";`
			`system = "@system@";`
			`builder = "@shell@";`
			`args = ["-e" "-x" (builtins.toFile "builder" "PATH=@testPath@; ln -s $input $out")];`
* builtins.filterSource: pass the type of the file ("regular", "directory", "symlink") as the second argument to the filter predicate. 2007-01-15 08:54:51 +00:00			`input =`
New primitives: * `sub' to subtract two numbers. * `stringLength' to get the length of a string. * `substring' to get a substring of a string. These should be enough to allow most string operations to be expressed. 2007-01-29 14:23:09 +00:00			`let filter = path: type:`
			`type != "symlink"`
			`&& baseNameOf path != "foo"`
			`&& !((import ./lang/lib.nix).hasSuffix ".bak" (baseNameOf path));`
* builtins.filterSource: pass the type of the file ("regular", "directory", "symlink") as the second argument to the filter predicate. 2007-01-15 08:54:51 +00:00			`in builtins.filterSource filter ./test-tmp/filterin;`
* New primop builtins.filterSource, which can be used to filter files from a source directory. All files for which a predicate function returns true are copied to the store. Typical example is to leave out the .svn directory: stdenv.mkDerivation { ... src = builtins.filterSource (path: baseNameOf (toString path) != ".svn") ./source-dir; # as opposed to # src = ./source-dir; } This is important because the .svn directory influences the hash in a rather unpredictable and variable way. 2006-12-12 23:05:01 +00:00			`}`