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{ lib, stdenv, stdenvNoCC, lndir }:
let
runCommand' = stdenv: name: env: buildCommand:
stdenv.mkDerivation ({
inherit name buildCommand;
passAsFile = [ "buildCommand" ];
} // env);
in
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. By default `runCommand' runs using
* stdenv with no compiler environment. `runCommandCC`
*
* Examples:
* runCommand "name" {envVariable = true;} ''echo hello''
* runCommandNoCC "name" {envVariable = true;} ''echo hello'' # equivalent to prior
* runCommandCC "name" {} ''gcc -o myfile myfile.c; cp myfile $out'';
*/
runCommand = runCommandNoCC;
runCommandNoCC = runCommand' stdenvNoCC;
runCommandCC = runCommand' stdenv;
/* Writes a text file to the nix store.
* The contents of text is added to the file in the store.
*
* Examples:
* # Writes my-file to /nix/store/<store path>
* writeTextFile "my-file"
* ''
* Contents of File
* '';
*
* # Writes executable my-file to /nix/store/<store path>/bin/my-file
* writeTextFile "my-file"
* ''
* Contents of File
* ''
* true
* "/bin/my-file";
* true
*/
writeTextFile =
{ name # the name of the derivation
, text
, executable ? false # run chmod +x ?
, destination ? "" # relative path appended to $out eg "/bin/foo"
, checkPhase ? "" # syntax checks, e.g. for scripts
}:
runCommand name
{ inherit text executable;
passAsFile = [ "text" ];
# Pointless to do this on a remote machine.
preferLocalBuild = true;
allowSubstitutes = false;
}
''
n=$out${destination}
mkdir -p "$(dirname "$n")"
if [ -e "$textPath" ]; then
mv "$textPath" "$n"
else
echo -n "$text" > "$n"
fi
${checkPhase}
(test -n "$executable" && chmod +x "$n") || true
'';
/*
* Writes a text file to nix store with no optional parameters available.
*
* Example:
* # Writes contents of file to /nix/store/<store path>
* writeText "my-file"
* ''
* Contents of File
* '';
*
*/
writeText = name: text: writeTextFile {inherit name text;};
/*
* Writes a text file to nix store in a specific directory with no
* optional parameters available. Name passed is the destination.
*
* Example:
* # Writes contents of file to /nix/store/<store path>/<name>
* writeTextDir "share/my-file"
* ''
* Contents of File
* '';
*
*/
writeTextDir = name: text: writeTextFile {inherit name text; destination = "/${name}";};
/*
* Writes a text file to /nix/store/<store path> and marks the file as executable.
*
* Example:
* # Writes my-file to /nix/store/<store path>/bin/my-file and makes executable
* writeScript "my-file"
* ''
* Contents of File
* '';
*
*/
writeScript = name: text: writeTextFile {inherit name text; executable = true;};
/*
* Writes a text file to /nix/store/<store path>/bin/<name> and
* marks the file as executable.
*
* Example:
* # Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
* writeScript "my-file"
* ''
* Contents of File
* '';
*
*/
writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
/*
* Writes a Shell script and check its syntax. Automatically includes interpreter
* above the contents passed.
*
* Example:
* # Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
* writeScript "my-file"
* ''
* Contents of File
* '';
*
*/
writeShellScriptBin = name : text :
writeTextFile {
inherit name;
executable = true;
destination = "/bin/${name}";
text = ''
#!${stdenv.shell}
${text}
'';
checkPhase = ''
${stdenv.shell} -n $out/bin/${name}
'';
};
# Create a C binary
writeCBin = name: code:
runCommandCC name
{
inherit name code;
executable = true;
passAsFile = ["code"];
# Pointless to do this on a remote machine.
preferLocalBuild = true;
allowSubstitutes = false;
}
''
n=$out/bin/$name
mkdir -p "$(dirname "$n")"
mv "$codePath" code.c
$CC -x c code.c -o "$n"
'';
/*
* Create a forest of symlinks to the files in `paths'.
*
* Examples:
* # adds symlinks of hello to current build.
* { symlinkJoin, hello }:
* symlinkJoin { name = "myhello"; paths = [ hello ]; }
*
* # adds symlinks of hello to current build and prints "links added"
* { symlinkJoin, hello }:
* symlinkJoin { name = "myhello"; paths = [ hello ]; postBuild = "echo links added"; }
*/
symlinkJoin =
args_@{ name
, paths
, preferLocalBuild ? true
, allowSubstitutes ? false
, postBuild ? ""
, ...
}:
let
args = removeAttrs args_ [ "name" "postBuild" ]
// { inherit preferLocalBuild allowSubstitutes; }; # pass the defaults
in runCommand name args
''
mkdir -p $out
for i in $paths; do
${lndir}/bin/lndir -silent $i $out
done
${postBuild}
'';
/*
* Make a package that just contains a setup hook with the given contents.
* This setup hook will be invoked by any package that includes this package
* as a buildInput. Optionally takes a list of substitutions that should be
* applied to the resulting script.
*
* Examples:
* # setup hook that depends on the hello package and runs ./myscript.sh
* myhellohook = makeSetupHook { deps = [ hello ]; } ./myscript.sh;
*
* # wrotes a setup hook where @bash@ myscript.sh is substituted for the
* # bash interpreter.
* myhellohookSub = makeSetupHook {
* deps = [ hello ];
* substitutions = { bash = "${pkgs.bash}/bin/bash"; };
* } ./myscript.sh;
*/
makeSetupHook = { name ? "hook", deps ? [], substitutions ? {} }: script:
runCommand name substitutions
(''
mkdir -p $out/nix-support
cp ${script} $out/nix-support/setup-hook
'' + lib.optionalString (deps != []) ''
printWords ${toString deps} > $out/nix-support/propagated-build-inputs
'' + lib.optionalString (substitutions != {}) ''
substituteAll ${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/..."; }
*
* Example:
*
* # Symlinks hello path in store to current $out/hello
* linkFarm "hello" entries = [ { name = "hello"; path = pkgs.hello; } ];
*
*/
linkFarm = name: entries: runCommand name { preferLocalBuild = true; }
("mkdir -p $out; cd $out; \n" +
(lib.concatMapStrings (x: ''
mkdir -p "$(dirname '${x.name}')"
ln -s '${x.path}' '${x.name}'
'') entries));
/* Print an error message if the file with the specified name and
* hash doesn't exist in the Nix store. This function should only
* be used by non-redistributable software with an unfree license
* that we need to require the user to download manually. It produces
* packages that cannot be built automatically.
*
* Examples:
*
* requireFile {
* name = "my-file";
* url = "http://example.com/download/";
* sha256 = "ffffffffffffffffffffffffffffffffffffffffffffffffffff";
* }
*/
requireFile = { name ? null
, sha256 ? null
, sha1 ? null
, url ? null
, message ? null
, hashMode ? "flat"
} :
assert (message != null) || (url != null);
assert (sha256 != null) || (sha1 != null);
assert (name != null) || (url != null);
let msg =
if message != null then message
else ''
Unfortunately, we cannot download file ${name_} automatically.
Please go to ${url} to download it yourself, and add it to the Nix store
using either
nix-store --add-fixed ${hashAlgo} ${name_}
or
nix-prefetch-url --type ${hashAlgo} file:///path/to/${name_}
'';
hashAlgo = if sha256 != null then "sha256" else "sha1";
hash = if sha256 != null then sha256 else sha1;
name_ = if name == null then baseNameOf (toString url) else name;
in
stdenvNoCC.mkDerivation {
name = name_;
outputHashMode = hashMode;
outputHashAlgo = hashAlgo;
outputHash = hash;
preferLocalBuild = true;
allowSubstitutes = false;
builder = writeScript "restrict-message" ''
source ${stdenvNoCC}/setup
cat <<_EOF_
***
${msg}
***
_EOF_
exit 1
'';
};
# Copy a path to the Nix store.
# Nix automatically copies files to the store before stringifying paths.
# If you need the store path of a file, ${copyPathToStore <path>} can be
# shortened to ${<path>}.
copyPathToStore = builtins.filterSource (p: t: true);
# Copy a list of paths to the Nix store.
copyPathsToStore = builtins.map copyPathToStore;
}