mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-22 21:50:55 +00:00
102 lines
3 KiB
Nix
102 lines
3 KiB
Nix
{ stdenv, lndir }:
|
|
|
|
rec {
|
|
|
|
# Run the shell command `buildCommand' to produce a store path named
|
|
# `name'. The attributes in `env' are added to the environment
|
|
# prior to running the command.
|
|
runCommand = name: env: buildCommand:
|
|
stdenv.mkDerivation ({
|
|
inherit name buildCommand;
|
|
} // env);
|
|
|
|
|
|
# Create a single file.
|
|
writeTextFile =
|
|
{ name # the name of the derivation
|
|
, text
|
|
, executable ? false # run chmod +x ?
|
|
, destination ? "" # relative path appended to $out eg "/bin/foo"
|
|
}:
|
|
runCommand name {inherit text executable; }
|
|
''
|
|
n=$out${destination}
|
|
mkdir -p "$(dirname "$n")"
|
|
echo -n "$text" > "$n"
|
|
(test -n "$executable" && chmod +x "$n") || true
|
|
'';
|
|
|
|
|
|
# Shorthands for `writeTextFile'.
|
|
writeText = name: text: writeTextFile {inherit name text;};
|
|
writeScript = name: text: writeTextFile {inherit name text; executable = true;};
|
|
writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
|
|
|
|
|
|
# Create a forest of symlinks to the files in `paths'.
|
|
symlinkJoin = name: paths:
|
|
runCommand name { inherit paths; }
|
|
''
|
|
mkdir -p $out
|
|
for i in $paths; do
|
|
${lndir}/bin/lndir $i $out
|
|
done
|
|
'';
|
|
|
|
|
|
# Make a package that just contains a setup hook with the given contents.
|
|
makeSetupHook = script:
|
|
runCommand "hook" {}
|
|
''
|
|
ensureDir $out/nix-support
|
|
cp ${script} $out/nix-support/setup-hook
|
|
'';
|
|
|
|
|
|
# Write the references (i.e. the runtime dependencies in the Nix store) of `path' to a file.
|
|
writeReferencesToFile = path: runCommand "runtime-deps"
|
|
{
|
|
exportReferencesGraph = ["graph" path];
|
|
}
|
|
''
|
|
touch $out
|
|
while read path; do
|
|
echo $path >> $out
|
|
read dummy
|
|
read nrRefs
|
|
for ((i = 0; i < nrRefs; i++)); do read ref; done
|
|
done < graph
|
|
'';
|
|
|
|
# Quickly create a set of symlinks to derivations.
|
|
# entries is a list of attribute sets like { name = "name" ; path = "/nix/store/..."; }
|
|
linkFarm = name: entries: runCommand name {} ("mkdir -p $out; cd $out; \n" +
|
|
(stdenv.lib.concatMapStrings (x: "ln -s '${x.path}' '${x.name}';\n") entries));
|
|
|
|
# Search in the environment if the same program exists with a set uid or
|
|
# set gid bit. If it exists, run the first program found, otherwise run
|
|
# the default binary.
|
|
useSetUID = drv: path:
|
|
let
|
|
name = stdenv.lib.basename path;
|
|
bin = "${drv}${path}";
|
|
in assert name != "";
|
|
writeScript "setUID-${name}" ''
|
|
#!${stdenv.shell}
|
|
inode=$(stat -Lc %i ${bin})
|
|
for file in $(type -ap ${name}); do
|
|
case $(stat -Lc %a $file) in
|
|
([2-7][0-7][0-7][0-7])
|
|
if test -r "$file".real; then
|
|
orig=$(cat "$file".real)
|
|
if test $inode = $(stat -Lc %i "$orig"); then
|
|
exec "$file" "$@"
|
|
fi
|
|
fi;;
|
|
esac
|
|
done
|
|
exec ${bin} "$@"
|
|
'';
|
|
|
|
}
|