mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-22 21:50:55 +00:00
620 lines
19 KiB
Nix
620 lines
19 KiB
Nix
{ lib, stdenv, stdenvNoCC, lndir, runtimeShell }:
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rec {
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/* Run the shell command `buildCommand' to produce a store path named
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* `name'. The attributes in `env' are added to the environment
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* prior to running the command. By default `runCommand` runs in a
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* stdenv with no compiler environment. `runCommandCC` uses the default
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* stdenv, `pkgs.stdenv`.
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*
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* Examples:
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* runCommand "name" {envVariable = true;} ''echo hello > $out''
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* runCommandNoCC "name" {envVariable = true;} ''echo hello > $out'' # equivalent to prior
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* runCommandCC "name" {} ''gcc -o myfile myfile.c; cp myfile $out'';
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*
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* The `*Local` variants force a derivation to be built locally,
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* it is not substituted.
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*
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* This is intended for very cheap commands (<1s execution time).
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* It saves on the network roundrip and can speed up a build.
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*
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* It is the same as adding the special fields
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* `preferLocalBuild = true;`
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* `allowSubstitutes = false;`
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* to a derivation’s attributes.
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*/
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runCommand = name: env: runCommandWith {
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stdenv = stdenvNoCC;
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runLocal = false;
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inherit name;
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derivationArgs = env;
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};
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runCommandLocal = name: env: runCommandWith {
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stdenv = stdenvNoCC;
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runLocal = true;
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inherit name;
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derivationArgs = env;
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};
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runCommandCC = name: env: runCommandWith {
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stdenv = stdenv;
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runLocal = false;
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inherit name;
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derivationArgs = env;
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};
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# `runCommandCCLocal` left out on purpose.
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# We shouldn’t force the user to have a cc in scope.
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/* Generalized version of the `runCommand`-variants
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* which does customized behavior via a single
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* attribute set passed as the first argument
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* instead of having a lot of variants like
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* `runCommand*`. Additionally it allows changing
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* the used `stdenv` freely and has a more explicit
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* approach to changing the arguments passed to
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* `stdenv.mkDerivation`.
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*/
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runCommandWith =
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let
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# prevent infinite recursion for the default stdenv value
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defaultStdenv = stdenv;
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in
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{ stdenv ? defaultStdenv
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# which stdenv to use, defaults to a stdenv with a C compiler, pkgs.stdenv
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, runLocal ? false
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# whether to build this derivation locally instead of substituting
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, derivationArgs ? {}
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# extra arguments to pass to stdenv.mkDerivation
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, name
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# name of the resulting derivation
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}: buildCommand:
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stdenv.mkDerivation ({
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name = lib.strings.sanitizeDerivationName name;
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inherit buildCommand;
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passAsFile = [ "buildCommand" ]
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++ (derivationArgs.passAsFile or []);
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}
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// (lib.optionalAttrs runLocal {
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preferLocalBuild = true;
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allowSubstitutes = false;
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})
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// builtins.removeAttrs derivationArgs [ "passAsFile" ]);
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/* Writes a text file to the nix store.
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* The contents of text is added to the file in the store.
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*
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* Examples:
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* # Writes my-file to /nix/store/<store path>
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* writeTextFile {
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* name = "my-file";
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* text = ''
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* Contents of File
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* '';
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* }
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* # See also the `writeText` helper function below.
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*
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* # Writes executable my-file to /nix/store/<store path>/bin/my-file
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* writeTextFile {
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* name = "my-file";
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* text = ''
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* Contents of File
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* '';
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* executable = true;
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* destination = "/bin/my-file";
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* }
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*/
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writeTextFile =
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{ name # the name of the derivation
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, text
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, executable ? false # run chmod +x ?
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, destination ? "" # relative path appended to $out eg "/bin/foo"
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, checkPhase ? "" # syntax checks, e.g. for scripts
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}:
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runCommand name
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{ inherit text executable checkPhase;
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passAsFile = [ "text" ];
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# Pointless to do this on a remote machine.
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preferLocalBuild = true;
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allowSubstitutes = false;
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}
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''
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n=$out${destination}
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mkdir -p "$(dirname "$n")"
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if [ -e "$textPath" ]; then
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mv "$textPath" "$n"
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else
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echo -n "$text" > "$n"
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fi
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eval "$checkPhase"
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(test -n "$executable" && chmod +x "$n") || true
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'';
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/*
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* Writes a text file to nix store with no optional parameters available.
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*
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* Example:
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* # Writes contents of file to /nix/store/<store path>
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* writeText "my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeText = name: text: writeTextFile {inherit name text;};
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/*
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* Writes a text file to nix store in a specific directory with no
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* optional parameters available.
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*
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* Example:
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* # Writes contents of file to /nix/store/<store path>/share/my-file
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* writeTextDir "share/my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeTextDir = path: text: writeTextFile {
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inherit text;
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name = builtins.baseNameOf path;
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destination = "/${path}";
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};
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/*
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* Writes a text file to /nix/store/<store path> and marks the file as
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* executable.
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*
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* If passed as a build input, will be used as a setup hook. This makes setup
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* hooks more efficient to create: you don't need a derivation that copies
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* them to $out/nix-support/setup-hook, instead you can use the file as is.
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*
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* Example:
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* # Writes my-file to /nix/store/<store path> and makes executable
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* writeScript "my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeScript = name: text: writeTextFile {inherit name text; executable = true;};
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/*
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* Writes a text file to /nix/store/<store path>/bin/<name> and
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* marks the file as executable.
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*
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* Example:
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* # Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
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* writeScriptBin "my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
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/*
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* Similar to writeScript. Writes a Shell script and checks its syntax.
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* Automatically includes interpreter above the contents passed.
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*
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* Example:
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* # Writes my-file to /nix/store/<store path> and makes executable.
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* writeShellScript "my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeShellScript = name: text:
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writeTextFile {
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inherit name;
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executable = true;
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text = ''
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#!${runtimeShell}
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${text}
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'';
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checkPhase = ''
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${stdenv.shell} -n $out
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'';
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};
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/*
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* Similar to writeShellScript and writeScriptBin.
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* Writes an executable Shell script to /nix/store/<store path>/bin/<name> and checks its syntax.
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* Automatically includes interpreter above the contents passed.
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*
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* Example:
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* # Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
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* writeShellScriptBin "my-file"
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* ''
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* Contents of File
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* '';
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*
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*/
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writeShellScriptBin = name : text :
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writeTextFile {
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inherit name;
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executable = true;
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destination = "/bin/${name}";
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text = ''
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#!${runtimeShell}
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${text}
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'';
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checkPhase = ''
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${stdenv.shell} -n $out/bin/${name}
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'';
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};
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# Create a C binary
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writeCBin = name: code:
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runCommandCC name
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{
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inherit name code;
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executable = true;
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passAsFile = ["code"];
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# Pointless to do this on a remote machine.
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preferLocalBuild = true;
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allowSubstitutes = false;
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}
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''
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n=$out/bin/$name
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mkdir -p "$(dirname "$n")"
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mv "$codePath" code.c
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$CC -x c code.c -o "$n"
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'';
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/*
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* Create a forest of symlinks to the files in `paths'.
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*
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* This creates a single derivation that replicates the directory structure
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* of all the input paths.
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*
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* BEWARE: it may not "work right" when the passed paths contain symlinks to directories.
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*
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* Examples:
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* # adds symlinks of hello to current build.
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* symlinkJoin { name = "myhello"; paths = [ pkgs.hello ]; }
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*
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* # adds symlinks of hello and stack to current build and prints "links added"
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* symlinkJoin { name = "myexample"; paths = [ pkgs.hello pkgs.stack ]; postBuild = "echo links added"; }
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*
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* This creates a derivation with a directory structure like the following:
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*
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* /nix/store/sglsr5g079a5235hy29da3mq3hv8sjmm-myexample
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* |-- bin
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* | |-- hello -> /nix/store/qy93dp4a3rqyn2mz63fbxjg228hffwyw-hello-2.10/bin/hello
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* | `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/bin/stack
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* `-- share
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* |-- bash-completion
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* | `-- completions
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* | `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/bash-completion/completions/stack
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* |-- fish
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* | `-- vendor_completions.d
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* | `-- stack.fish -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/fish/vendor_completions.d/stack.fish
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* ...
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*
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* symlinkJoin and linkFarm are similar functions, but they output
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* derivations with different structure.
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*
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* symlinkJoin is used to create a derivation with a familiar directory
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* structure (top-level bin/, share/, etc), but with all actual files being symlinks to
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* the files in the input derivations.
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*
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* symlinkJoin is used many places in nixpkgs to create a single derivation
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* that appears to contain binaries, libraries, documentation, etc from
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* multiple input derivations.
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*
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* linkFarm is instead used to create a simple derivation with symlinks to
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* other derivations. A derivation created with linkFarm is often used in CI
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* as a easy way to build multiple derivations at once.
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*/
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symlinkJoin =
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args_@{ name
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, paths
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, preferLocalBuild ? true
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, allowSubstitutes ? false
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, postBuild ? ""
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, ...
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}:
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let
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args = removeAttrs args_ [ "name" "postBuild" ]
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// {
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inherit preferLocalBuild allowSubstitutes;
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passAsFile = [ "paths" ];
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}; # pass the defaults
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in runCommand name args
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''
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mkdir -p $out
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for i in $(cat $pathsPath); do
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${lndir}/bin/lndir -silent $i $out
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done
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${postBuild}
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'';
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/*
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* Quickly create a set of symlinks to derivations.
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*
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* This creates a simple derivation with symlinks to all inputs.
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*
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* entries is a list of attribute sets like
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* { name = "name" ; path = "/nix/store/..."; }
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*
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* Example:
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*
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* # Symlinks hello and stack paths in store to current $out/hello-test and
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* # $out/foobar.
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* linkFarm "myexample" [ { name = "hello-test"; path = pkgs.hello; } { name = "foobar"; path = pkgs.stack; } ]
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*
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* This creates a derivation with a directory structure like the following:
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*
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* /nix/store/qc5728m4sa344mbks99r3q05mymwm4rw-myexample
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* |-- foobar -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1
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* `-- hello-test -> /nix/store/qy93dp4a3rqyn2mz63fbxjg228hffwyw-hello-2.10
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*
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* See the note on symlinkJoin for the difference between linkFarm and symlinkJoin.
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*/
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linkFarm = name: entries: runCommand name { preferLocalBuild = true; allowSubstitutes = false; }
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''mkdir -p $out
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cd $out
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${lib.concatMapStrings (x: ''
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mkdir -p "$(dirname ${lib.escapeShellArg x.name})"
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ln -s ${lib.escapeShellArg x.path} ${lib.escapeShellArg x.name}
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'') entries}
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'';
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/*
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* Easily create a linkFarm from a set of derivations.
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*
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* This calls linkFarm with a list of entries created from the list of input
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* derivations. It turns each input derivation into an attribute set
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* like { name = drv.name ; path = drv }, and passes this to linkFarm.
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*
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* Example:
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*
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* # Symlinks the hello, gcc, and ghc derivations in $out
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* linkFarmFromDrvs "myexample" [ pkgs.hello pkgs.gcc pkgs.ghc ]
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*
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* This creates a derivation with a directory structure like the following:
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*
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* /nix/store/m3s6wkjy9c3wy830201bqsb91nk2yj8c-myexample
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* |-- gcc-wrapper-9.2.0 -> /nix/store/fqhjxf9ii4w4gqcsx59fyw2vvj91486a-gcc-wrapper-9.2.0
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* |-- ghc-8.6.5 -> /nix/store/gnf3s07bglhbbk4y6m76sbh42siym0s6-ghc-8.6.5
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* `-- hello-2.10 -> /nix/store/k0ll91c4npk4lg8lqhx00glg2m735g74-hello-2.10
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*/
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linkFarmFromDrvs = name: drvs:
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let mkEntryFromDrv = drv: { name = drv.name; path = drv; };
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in linkFarm name (map mkEntryFromDrv drvs);
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/*
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* Make a package that just contains a setup hook with the given contents.
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* This setup hook will be invoked by any package that includes this package
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* as a buildInput. Optionally takes a list of substitutions that should be
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* applied to the resulting script.
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*
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* Examples:
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* # setup hook that depends on the hello package and runs ./myscript.sh
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* myhellohook = makeSetupHook { deps = [ hello ]; } ./myscript.sh;
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*
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* # wrotes a setup hook where @bash@ myscript.sh is substituted for the
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* # bash interpreter.
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* myhellohookSub = makeSetupHook {
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* deps = [ hello ];
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* substitutions = { bash = "${pkgs.bash}/bin/bash"; };
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* } ./myscript.sh;
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*/
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makeSetupHook = { name ? "hook", deps ? [], substitutions ? {} }: script:
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runCommand name substitutions
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(''
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mkdir -p $out/nix-support
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cp ${script} $out/nix-support/setup-hook
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'' + lib.optionalString (deps != []) ''
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printWords ${toString deps} > $out/nix-support/propagated-build-inputs
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'' + lib.optionalString (substitutions != {}) ''
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substituteAll ${script} $out/nix-support/setup-hook
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'');
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# Write the references (i.e. the runtime dependencies in the Nix store) of `path' to a file.
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writeReferencesToFile = path: runCommand "runtime-deps"
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{
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exportReferencesGraph = ["graph" path];
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}
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''
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touch $out
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while read path; do
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echo $path >> $out
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read dummy
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read nrRefs
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for ((i = 0; i < nrRefs; i++)); do read ref; done
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done < graph
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'';
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/*
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Write the set of references to a file, that is, their immediate dependencies.
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This produces the equivalent of `nix-store -q --references`.
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*/
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writeDirectReferencesToFile = path: runCommand "runtime-references"
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{
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exportReferencesGraph = ["graph" path];
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inherit path;
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}
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''
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touch ./references
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while read p; do
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read dummy
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read nrRefs
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if [[ $p == $path ]]; then
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for ((i = 0; i < nrRefs; i++)); do
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read ref;
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echo $ref >>./references
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done
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else
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for ((i = 0; i < nrRefs; i++)); do
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read ref;
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done
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fi
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done < graph
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sort ./references >$out
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'';
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/* Print an error message if the file with the specified name and
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* hash doesn't exist in the Nix store. This function should only
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* be used by non-redistributable software with an unfree license
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* that we need to require the user to download manually. It produces
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* packages that cannot be built automatically.
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*
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* Examples:
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||
*
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* requireFile {
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* name = "my-file";
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* url = "http://example.com/download/";
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* sha256 = "ffffffffffffffffffffffffffffffffffffffffffffffffffff";
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* }
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*/
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requireFile = { name ? null
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, sha256 ? null
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, sha1 ? null
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, url ? null
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, message ? null
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, hashMode ? "flat"
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||
} :
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assert (message != null) || (url != null);
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assert (sha256 != null) || (sha1 != null);
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assert (name != null) || (url != null);
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let msg =
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||
if message != null then message
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else ''
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||
Unfortunately, we cannot download file ${name_} automatically.
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||
Please go to ${url} to download it yourself, and add it to the Nix store
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||
using either
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nix-store --add-fixed ${hashAlgo} ${name_}
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or
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nix-prefetch-url --type ${hashAlgo} file:///path/to/${name_}
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'';
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hashAlgo = if sha256 != null then "sha256" else "sha1";
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hash = if sha256 != null then sha256 else sha1;
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name_ = if name == null then baseNameOf (toString url) else name;
|
||
in
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stdenvNoCC.mkDerivation {
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||
name = name_;
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||
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;
|
||
|
||
/* Applies a list of patches to a source directory.
|
||
*
|
||
* Examples:
|
||
*
|
||
* # Patching nixpkgs:
|
||
* applyPatches {
|
||
* src = pkgs.path;
|
||
* patches = [
|
||
* (pkgs.fetchpatch {
|
||
* url = "https://github.com/NixOS/nixpkgs/commit/1f770d20550a413e508e081ddc08464e9d08ba3d.patch";
|
||
* sha256 = "1nlzx171y3r3jbk0qhvnl711kmdk57jlq4na8f8bs8wz2pbffymr";
|
||
* })
|
||
* ];
|
||
* }
|
||
*/
|
||
applyPatches =
|
||
{ src
|
||
, name ? (if builtins.typeOf src == "path"
|
||
then builtins.baseNameOf src
|
||
else
|
||
if builtins.isAttrs src && builtins.hasAttr "name" src
|
||
then src.name
|
||
else throw "applyPatches: please supply a `name` argument because a default name can only be computed when the `src` is a path or is an attribute set with a `name` attribute."
|
||
) + "-patched"
|
||
, patches ? []
|
||
, postPatch ? ""
|
||
}: stdenvNoCC.mkDerivation {
|
||
inherit name src patches postPatch;
|
||
preferLocalBuild = true;
|
||
allowSubstitutes = false;
|
||
phases = "unpackPhase patchPhase installPhase";
|
||
installPhase = "cp -R ./ $out";
|
||
};
|
||
|
||
/* An immutable file in the store with a length of 0 bytes. */
|
||
emptyFile = runCommand "empty-file" {
|
||
outputHashAlgo = "sha256";
|
||
outputHashMode = "recursive";
|
||
outputHash = "0ip26j2h11n1kgkz36rl4akv694yz65hr72q4kv4b3lxcbi65b3p";
|
||
preferLocalBuild = true;
|
||
} "touch $out";
|
||
|
||
/* An immutable empty directory in the store. */
|
||
emptyDirectory = runCommand "empty-directory" {
|
||
outputHashAlgo = "sha256";
|
||
outputHashMode = "recursive";
|
||
outputHash = "0sjjj9z1dhilhpc8pq4154czrb79z9cm044jvn75kxcjv6v5l2m5";
|
||
preferLocalBuild = true;
|
||
} "mkdir $out";
|
||
|
||
/* Checks the command output contains the specified version
|
||
*
|
||
* Although simplistic, this test assures that the main program
|
||
* can run. While there's no substitute for a real test case,
|
||
* it does catch dynamic linking errors and such. It also provides
|
||
* some protection against accidentally building the wrong version,
|
||
* for example when using an 'old' hash in a fixed-output derivation.
|
||
*
|
||
* Examples:
|
||
*
|
||
* passthru.tests.version = testVersion { package = hello; };
|
||
*
|
||
* passthru.tests.version = testVersion {
|
||
* package = seaweedfs;
|
||
* command = "weed version";
|
||
* };
|
||
*
|
||
* passthru.tests.version = testVersion {
|
||
* package = key;
|
||
* command = "KeY --help";
|
||
* # Wrong '2.5' version in the code. Drop on next version.
|
||
* version = "2.5";
|
||
* };
|
||
*/
|
||
testVersion =
|
||
{ package,
|
||
command ? "${package.meta.mainProgram or package.pname or package.name} --version",
|
||
version ? package.version,
|
||
}: runCommand "test-version" { nativeBuildInputs = [ package ]; meta.timeout = 60; } ''
|
||
${command} |& grep -Fw ${version}
|
||
touch $out
|
||
'';
|
||
}
|