mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-23 15:33:13 +00:00
888 lines
26 KiB
Nix
888 lines
26 KiB
Nix
{ lib, stdenv, stdenvNoCC, lndir, runtimeShell, shellcheck }:
|
||
|
||
let
|
||
inherit (lib)
|
||
optionalAttrs
|
||
warn
|
||
;
|
||
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 in a
|
||
stdenv with no compiler environment. `runCommandCC` uses the default
|
||
stdenv, `pkgs.stdenv`.
|
||
|
||
Example:
|
||
|
||
|
||
runCommand "name" {envVariable = true;} ''echo hello > $out''
|
||
runCommandCC "name" {} ''gcc -o myfile myfile.c; cp myfile $out'';
|
||
|
||
|
||
The `*Local` variants force a derivation to be built locally,
|
||
it is not substituted.
|
||
|
||
This is intended for very cheap commands (<1s execution time).
|
||
It saves on the network roundrip and can speed up a build.
|
||
|
||
It is the same as adding the special fields
|
||
|
||
`preferLocalBuild = true;`
|
||
`allowSubstitutes = false;`
|
||
|
||
to a derivation’s attributes.
|
||
*/
|
||
runCommand = name: env: runCommandWith {
|
||
stdenv = stdenvNoCC;
|
||
runLocal = false;
|
||
inherit name;
|
||
derivationArgs = env;
|
||
};
|
||
runCommandLocal = name: env: runCommandWith {
|
||
stdenv = stdenvNoCC;
|
||
runLocal = true;
|
||
inherit name;
|
||
derivationArgs = env;
|
||
};
|
||
|
||
runCommandCC = name: env: runCommandWith {
|
||
stdenv = stdenv;
|
||
runLocal = false;
|
||
inherit name;
|
||
derivationArgs = env;
|
||
};
|
||
# `runCommandCCLocal` left out on purpose.
|
||
# We shouldn’t force the user to have a cc in scope.
|
||
|
||
/* Generalized version of the `runCommand`-variants
|
||
which does customized behavior via a single
|
||
attribute set passed as the first argument
|
||
instead of having a lot of variants like
|
||
`runCommand*`. Additionally it allows changing
|
||
the used `stdenv` freely and has a more explicit
|
||
approach to changing the arguments passed to
|
||
`stdenv.mkDerivation`.
|
||
*/
|
||
runCommandWith =
|
||
let
|
||
# prevent infinite recursion for the default stdenv value
|
||
defaultStdenv = stdenv;
|
||
in
|
||
{
|
||
# which stdenv to use, defaults to a stdenv with a C compiler, pkgs.stdenv
|
||
stdenv ? defaultStdenv
|
||
# whether to build this derivation locally instead of substituting
|
||
, runLocal ? false
|
||
# extra arguments to pass to stdenv.mkDerivation
|
||
, derivationArgs ? {}
|
||
# name of the resulting derivation
|
||
, name
|
||
# TODO(@Artturin): enable strictDeps always
|
||
}: buildCommand:
|
||
stdenv.mkDerivation ({
|
||
enableParallelBuilding = true;
|
||
inherit buildCommand name;
|
||
passAsFile = [ "buildCommand" ]
|
||
++ (derivationArgs.passAsFile or []);
|
||
}
|
||
// (lib.optionalAttrs runLocal {
|
||
preferLocalBuild = true;
|
||
allowSubstitutes = false;
|
||
})
|
||
// builtins.removeAttrs derivationArgs [ "passAsFile" ]);
|
||
|
||
|
||
/* Writes a text file to the nix store.
|
||
The contents of text is added to the file in the store.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path>
|
||
writeTextFile {
|
||
name = "my-file";
|
||
text = ''
|
||
Contents of File
|
||
'';
|
||
}
|
||
|
||
|
||
See also the `writeText` helper function below.
|
||
|
||
|
||
# Writes executable my-file to /nix/store/<store path>/bin/my-file
|
||
writeTextFile {
|
||
name = "my-file";
|
||
text = ''
|
||
Contents of File
|
||
'';
|
||
executable = true;
|
||
destination = "/bin/my-file";
|
||
}
|
||
|
||
|
||
*/
|
||
writeTextFile =
|
||
{ name # the name of the derivation
|
||
, text
|
||
, executable ? false # run chmod +x ?
|
||
, destination ? "" # relative path appended to $out eg "/bin/foo"
|
||
, checkPhase ? "" # syntax checks, e.g. for scripts
|
||
, meta ? { }
|
||
}:
|
||
runCommand name
|
||
{ inherit text executable checkPhase meta;
|
||
passAsFile = [ "text" ];
|
||
# Pointless to do this on a remote machine.
|
||
preferLocalBuild = true;
|
||
allowSubstitutes = false;
|
||
}
|
||
''
|
||
target=$out${lib.escapeShellArg destination}
|
||
mkdir -p "$(dirname "$target")"
|
||
|
||
if [ -e "$textPath" ]; then
|
||
mv "$textPath" "$target"
|
||
else
|
||
echo -n "$text" > "$target"
|
||
fi
|
||
|
||
eval "$checkPhase"
|
||
|
||
(test -n "$executable" && chmod +x "$target") || true
|
||
'';
|
||
|
||
/*
|
||
Writes a text file to nix store with no optional parameters available.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes contents of file to /nix/store/<store path>
|
||
writeText "my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeText = name: text: writeTextFile {inherit name text;};
|
||
|
||
/*
|
||
Writes a text file to nix store in a specific directory with no
|
||
optional parameters available.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes contents of file to /nix/store/<store path>/share/my-file
|
||
writeTextDir "share/my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeTextDir = path: text: writeTextFile {
|
||
inherit text;
|
||
name = builtins.baseNameOf path;
|
||
destination = "/${path}";
|
||
};
|
||
|
||
/*
|
||
Writes a text file to /nix/store/<store path> and marks the file as
|
||
executable.
|
||
|
||
If passed as a build input, will be used as a setup hook. This makes setup
|
||
hooks more efficient to create: you don't need a derivation that copies
|
||
them to $out/nix-support/setup-hook, instead you can use the file as is.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path> and makes executable
|
||
writeScript "my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeScript = name: text: writeTextFile {inherit name text; executable = true;};
|
||
|
||
/*
|
||
Writes a text file to /nix/store/<store path>/bin/<name> and
|
||
marks the file as executable.
|
||
|
||
Example:
|
||
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
|
||
writeScriptBin "my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
|
||
|
||
/*
|
||
Similar to writeScript. Writes a Shell script and checks its syntax.
|
||
Automatically includes interpreter above the contents passed.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path> and makes executable.
|
||
writeShellScript "my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeShellScript = name: text:
|
||
writeTextFile {
|
||
inherit name;
|
||
executable = true;
|
||
text = ''
|
||
#!${runtimeShell}
|
||
${text}
|
||
'';
|
||
checkPhase = ''
|
||
${stdenv.shellDryRun} "$target"
|
||
'';
|
||
};
|
||
|
||
/*
|
||
Similar to writeShellScript and writeScriptBin.
|
||
Writes an executable Shell script to /nix/store/<store path>/bin/<name> and checks its syntax.
|
||
Automatically includes interpreter above the contents passed.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
|
||
writeShellScriptBin "my-file"
|
||
''
|
||
Contents of File
|
||
'';
|
||
|
||
|
||
*/
|
||
writeShellScriptBin = name : text :
|
||
writeTextFile {
|
||
inherit name;
|
||
executable = true;
|
||
destination = "/bin/${name}";
|
||
text = ''
|
||
#!${runtimeShell}
|
||
${text}
|
||
'';
|
||
checkPhase = ''
|
||
${stdenv.shellDryRun} "$target"
|
||
'';
|
||
};
|
||
|
||
/*
|
||
Similar to writeShellScriptBin and writeScriptBin.
|
||
Writes an executable Shell script to /nix/store/<store path>/bin/<name> and
|
||
checks its syntax with shellcheck and the shell's -n option.
|
||
Automatically includes sane set of shellopts (errexit, nounset, pipefail)
|
||
and handles creation of PATH based on runtimeInputs
|
||
|
||
Note that the checkPhase uses stdenv.shell for the test run of the script,
|
||
while the generated shebang uses runtimeShell. If, for whatever reason,
|
||
those were to mismatch you might lose fidelity in the default checks.
|
||
|
||
Example:
|
||
|
||
Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
|
||
|
||
|
||
writeShellApplication {
|
||
name = "my-file";
|
||
runtimeInputs = [ curl w3m ];
|
||
text = ''
|
||
curl -s 'https://nixos.org' | w3m -dump -T text/html
|
||
'';
|
||
}
|
||
|
||
*/
|
||
writeShellApplication =
|
||
{ name
|
||
, text
|
||
, runtimeInputs ? [ ]
|
||
, checkPhase ? null
|
||
}:
|
||
writeTextFile {
|
||
inherit name;
|
||
executable = true;
|
||
destination = "/bin/${name}";
|
||
text = ''
|
||
#!${runtimeShell}
|
||
set -o errexit
|
||
set -o nounset
|
||
set -o pipefail
|
||
'' + lib.optionalString (runtimeInputs != [ ]) ''
|
||
|
||
export PATH="${lib.makeBinPath runtimeInputs}:$PATH"
|
||
'' + ''
|
||
|
||
${text}
|
||
'';
|
||
|
||
checkPhase =
|
||
if checkPhase == null then ''
|
||
runHook preCheck
|
||
${stdenv.shellDryRun} "$target"
|
||
${shellcheck.unwrapped}/bin/shellcheck "$target"
|
||
runHook postCheck
|
||
''
|
||
else checkPhase;
|
||
|
||
meta.mainProgram = 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"
|
||
'';
|
||
|
||
|
||
/* concat a list of files to the nix store.
|
||
The contents of files are added to the file in the store.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes my-file to /nix/store/<store path>
|
||
concatTextFile {
|
||
name = "my-file";
|
||
files = [ drv1 "${drv2}/path/to/file" ];
|
||
}
|
||
|
||
|
||
See also the `concatText` helper function below.
|
||
|
||
|
||
# Writes executable my-file to /nix/store/<store path>/bin/my-file
|
||
concatTextFile {
|
||
name = "my-file";
|
||
files = [ drv1 "${drv2}/path/to/file" ];
|
||
executable = true;
|
||
destination = "/bin/my-file";
|
||
}
|
||
|
||
|
||
*/
|
||
concatTextFile =
|
||
{ name # the name of the derivation
|
||
, files
|
||
, executable ? false # run chmod +x ?
|
||
, destination ? "" # relative path appended to $out eg "/bin/foo"
|
||
, checkPhase ? "" # syntax checks, e.g. for scripts
|
||
, meta ? { }
|
||
}:
|
||
runCommandLocal name
|
||
{ inherit files executable checkPhase meta destination; }
|
||
''
|
||
file=$out$destination
|
||
mkdir -p "$(dirname "$file")"
|
||
cat $files > "$file"
|
||
|
||
(test -n "$executable" && chmod +x "$file") || true
|
||
eval "$checkPhase"
|
||
'';
|
||
|
||
|
||
/*
|
||
Writes a text file to nix store with no optional parameters available.
|
||
|
||
Example:
|
||
|
||
|
||
# Writes contents of files to /nix/store/<store path>
|
||
concatText "my-file" [ file1 file2 ]
|
||
|
||
|
||
*/
|
||
concatText = name: files: concatTextFile { inherit name files; };
|
||
|
||
/*
|
||
Writes a text file to nix store with and mark it as executable.
|
||
|
||
Example:
|
||
# Writes contents of files to /nix/store/<store path>
|
||
concatScript "my-file" [ file1 file2 ]
|
||
|
||
*/
|
||
concatScript = name: files: concatTextFile { inherit name files; executable = true; };
|
||
|
||
|
||
/*
|
||
Create a forest of symlinks to the files in `paths'.
|
||
|
||
This creates a single derivation that replicates the directory structure
|
||
of all the input paths.
|
||
|
||
BEWARE: it may not "work right" when the passed paths contain symlinks to directories.
|
||
|
||
Example:
|
||
|
||
|
||
# adds symlinks of hello to current build.
|
||
symlinkJoin { name = "myhello"; paths = [ pkgs.hello ]; }
|
||
|
||
|
||
|
||
|
||
# adds symlinks of hello and stack to current build and prints "links added"
|
||
symlinkJoin { name = "myexample"; paths = [ pkgs.hello pkgs.stack ]; postBuild = "echo links added"; }
|
||
|
||
|
||
This creates a derivation with a directory structure like the following:
|
||
|
||
|
||
/nix/store/sglsr5g079a5235hy29da3mq3hv8sjmm-myexample
|
||
|-- bin
|
||
| |-- hello -> /nix/store/qy93dp4a3rqyn2mz63fbxjg228hffwyw-hello-2.10/bin/hello
|
||
| `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/bin/stack
|
||
`-- share
|
||
|-- bash-completion
|
||
| `-- completions
|
||
| `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/bash-completion/completions/stack
|
||
|-- fish
|
||
| `-- vendor_completions.d
|
||
| `-- stack.fish -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/fish/vendor_completions.d/stack.fish
|
||
...
|
||
|
||
|
||
symlinkJoin and linkFarm are similar functions, but they output
|
||
derivations with different structure.
|
||
|
||
symlinkJoin is used to create a derivation with a familiar directory
|
||
structure (top-level bin/, share/, etc), but with all actual files being symlinks to
|
||
the files in the input derivations.
|
||
|
||
symlinkJoin is used many places in nixpkgs to create a single derivation
|
||
that appears to contain binaries, libraries, documentation, etc from
|
||
multiple input derivations.
|
||
|
||
linkFarm is instead used to create a simple derivation with symlinks to
|
||
other derivations. A derivation created with linkFarm is often used in CI
|
||
as a easy way to build multiple derivations at once.
|
||
*/
|
||
symlinkJoin =
|
||
args_@{ name
|
||
, paths
|
||
, preferLocalBuild ? true
|
||
, allowSubstitutes ? false
|
||
, postBuild ? ""
|
||
, ...
|
||
}:
|
||
let
|
||
args = removeAttrs args_ [ "name" "postBuild" ]
|
||
// {
|
||
inherit preferLocalBuild allowSubstitutes;
|
||
passAsFile = [ "paths" ];
|
||
}; # pass the defaults
|
||
in runCommand name args
|
||
''
|
||
mkdir -p $out
|
||
for i in $(cat $pathsPath); do
|
||
${lndir}/bin/lndir $i $out
|
||
done 2>&1 | sed 's/^/symlinkJoin: warning: keeping existing file: /'
|
||
${postBuild}
|
||
'';
|
||
|
||
/*
|
||
Quickly create a set of symlinks to derivations.
|
||
|
||
This creates a simple derivation with symlinks to all inputs.
|
||
|
||
entries can be a list of attribute sets like
|
||
|
||
[ { name = "name" ; path = "/nix/store/..."; } ]
|
||
|
||
|
||
or an attribute set name -> path like:
|
||
|
||
{ name = "/nix/store/..."; other = "/nix/store/..."; }
|
||
|
||
|
||
Example:
|
||
|
||
# Symlinks hello and stack paths in store to current $out/hello-test and
|
||
# $out/foobar.
|
||
linkFarm "myexample" [ { name = "hello-test"; path = pkgs.hello; } { name = "foobar"; path = pkgs.stack; } ]
|
||
|
||
This creates a derivation with a directory structure like the following:
|
||
|
||
/nix/store/qc5728m4sa344mbks99r3q05mymwm4rw-myexample
|
||
|-- foobar -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1
|
||
`-- hello-test -> /nix/store/qy93dp4a3rqyn2mz63fbxjg228hffwyw-hello-2.10
|
||
|
||
|
||
See the note on symlinkJoin for the difference between linkFarm and symlinkJoin.
|
||
*/
|
||
linkFarm = name: entries:
|
||
let
|
||
entries' =
|
||
if (lib.isAttrs entries) then entries
|
||
# We do this foldl to have last-wins semantics in case of repeated entries
|
||
else if (lib.isList entries) then lib.foldl (a: b: a // { "${b.name}" = b.path; }) { } entries
|
||
else throw "linkFarm entries must be either attrs or a list!";
|
||
|
||
linkCommands = lib.mapAttrsToList (name: path: ''
|
||
mkdir -p "$(dirname ${lib.escapeShellArg "${name}"})"
|
||
ln -s ${lib.escapeShellArg "${path}"} ${lib.escapeShellArg "${name}"}
|
||
'') entries';
|
||
in
|
||
runCommand name {
|
||
preferLocalBuild = true;
|
||
allowSubstitutes = false;
|
||
passthru.entries = entries';
|
||
} ''
|
||
mkdir -p $out
|
||
cd $out
|
||
${lib.concatStrings linkCommands}
|
||
'';
|
||
|
||
/*
|
||
Easily create a linkFarm from a set of derivations.
|
||
|
||
This calls linkFarm with a list of entries created from the list of input
|
||
derivations. It turns each input derivation into an attribute set
|
||
like { name = drv.name ; path = drv }, and passes this to linkFarm.
|
||
|
||
Example:
|
||
|
||
# Symlinks the hello, gcc, and ghc derivations in $out
|
||
linkFarmFromDrvs "myexample" [ pkgs.hello pkgs.gcc pkgs.ghc ]
|
||
|
||
This creates a derivation with a directory structure like the following:
|
||
|
||
|
||
/nix/store/m3s6wkjy9c3wy830201bqsb91nk2yj8c-myexample
|
||
|-- gcc-wrapper-9.2.0 -> /nix/store/fqhjxf9ii4w4gqcsx59fyw2vvj91486a-gcc-wrapper-9.2.0
|
||
|-- ghc-8.6.5 -> /nix/store/gnf3s07bglhbbk4y6m76sbh42siym0s6-ghc-8.6.5
|
||
`-- hello-2.10 -> /nix/store/k0ll91c4npk4lg8lqhx00glg2m735g74-hello-2.10
|
||
|
||
*/
|
||
linkFarmFromDrvs = name: drvs:
|
||
let mkEntryFromDrv = drv: { name = drv.name; path = drv; };
|
||
in linkFarm name (map mkEntryFromDrv drvs);
|
||
|
||
|
||
# docs in doc/builders/special/makesetuphook.section.md
|
||
makeSetupHook =
|
||
{ name ? lib.warn "calling makeSetupHook without passing a name is deprecated." "hook"
|
||
, deps ? [ ]
|
||
# hooks go in nativeBuildInput so these will be nativeBuildInput
|
||
, propagatedBuildInputs ? [ ]
|
||
# these will be buildInputs
|
||
, depsTargetTargetPropagated ? [ ]
|
||
, meta ? { }
|
||
, passthru ? { }
|
||
, substitutions ? { }
|
||
}:
|
||
script:
|
||
runCommand name
|
||
(substitutions // {
|
||
inherit meta;
|
||
inherit depsTargetTargetPropagated;
|
||
propagatedBuildInputs =
|
||
# remove list conditionals before 23.11
|
||
lib.warnIf (!lib.isList deps) "'deps' argument to makeSetupHook must be a list. content of deps: ${toString deps}"
|
||
(lib.warnIf (deps != [ ]) "'deps' argument to makeSetupHook is deprecated and will be removed in release 23.11., Please use propagatedBuildInputs instead. content of deps: ${toString deps}"
|
||
propagatedBuildInputs ++ (if lib.isList deps then deps else [ deps ]));
|
||
strictDeps = true;
|
||
# TODO 2023-01, no backport: simplify to inherit passthru;
|
||
passthru = passthru
|
||
// optionalAttrs (substitutions?passthru)
|
||
(warn "makeSetupHook (name = ${lib.strings.escapeNixString name}): `substitutions.passthru` is deprecated. Please set `passthru` directly."
|
||
substitutions.passthru);
|
||
})
|
||
(''
|
||
mkdir -p $out/nix-support
|
||
cp ${script} $out/nix-support/setup-hook
|
||
recordPropagatedDependencies
|
||
'' + 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
|
||
'';
|
||
|
||
/*
|
||
Write the set of references to a file, that is, their immediate dependencies.
|
||
|
||
This produces the equivalent of `nix-store -q --references`.
|
||
*/
|
||
writeDirectReferencesToFile = path: runCommand "runtime-references"
|
||
{
|
||
exportReferencesGraph = ["graph" path];
|
||
inherit path;
|
||
}
|
||
''
|
||
touch ./references
|
||
while read p; do
|
||
read dummy
|
||
read nrRefs
|
||
if [[ $p == $path ]]; then
|
||
for ((i = 0; i < nrRefs; i++)); do
|
||
read ref;
|
||
echo $ref >>./references
|
||
done
|
||
else
|
||
for ((i = 0; i < nrRefs; i++)); do
|
||
read ref;
|
||
done
|
||
fi
|
||
done < graph
|
||
sort ./references >$out
|
||
'';
|
||
|
||
|
||
/*
|
||
Extract a string's references to derivations and paths (its
|
||
context) and write them to a text file, removing the input string
|
||
itself from the dependency graph. This is useful when you want to
|
||
make a derivation depend on the string's references, but not its
|
||
contents (to avoid unnecessary rebuilds, for example).
|
||
|
||
Note that this only works as intended on Nix >= 2.3.
|
||
*/
|
||
writeStringReferencesToFile = string:
|
||
/*
|
||
The basic operation this performs is to copy the string context
|
||
from `string' to a second string and wrap that string in a
|
||
derivation. However, that alone is not enough, since nothing in the
|
||
string refers to the output paths of the derivations/paths in its
|
||
context, meaning they'll be considered build-time dependencies and
|
||
removed from the wrapper derivation's closure. Putting the
|
||
necessary output paths in the new string is however not very
|
||
straightforward - the attrset returned by `getContext' contains
|
||
only references to derivations' .drv-paths, not their output
|
||
paths. In order to "convert" them, we try to extract the
|
||
corresponding paths from the original string using regex.
|
||
*/
|
||
let
|
||
# Taken from https://github.com/NixOS/nix/blob/130284b8508dad3c70e8160b15f3d62042fc730a/src/libutil/hash.cc#L84
|
||
nixHashChars = "0123456789abcdfghijklmnpqrsvwxyz";
|
||
context = builtins.getContext string;
|
||
derivations = lib.filterAttrs (n: v: v ? outputs) context;
|
||
# Objects copied from outside of the store, such as paths and
|
||
# `builtins.fetch*`ed ones
|
||
sources = lib.attrNames (lib.filterAttrs (n: v: v ? path) context);
|
||
packages =
|
||
lib.mapAttrs'
|
||
(name: value:
|
||
{
|
||
inherit value;
|
||
name = lib.head (builtins.match "${builtins.storeDir}/[${nixHashChars}]+-(.*)\.drv" name);
|
||
})
|
||
derivations;
|
||
# The syntax of output paths differs between outputs named `out`
|
||
# and other, explicitly named ones. For explicitly named ones,
|
||
# the output name is suffixed as `-name`, but `out` outputs
|
||
# aren't suffixed at all, and thus aren't easily distinguished
|
||
# from named output paths. Therefore, we find all the named ones
|
||
# first so we can use them to remove false matches when looking
|
||
# for `out` outputs (see the definition of `outputPaths`).
|
||
namedOutputPaths =
|
||
lib.flatten
|
||
(lib.mapAttrsToList
|
||
(name: value:
|
||
(map
|
||
(output:
|
||
lib.filter
|
||
lib.isList
|
||
(builtins.split "(${builtins.storeDir}/[${nixHashChars}]+-${name}-${output})" string))
|
||
(lib.remove "out" value.outputs)))
|
||
packages);
|
||
# Only `out` outputs
|
||
outputPaths =
|
||
lib.flatten
|
||
(lib.mapAttrsToList
|
||
(name: value:
|
||
if lib.elem "out" value.outputs then
|
||
lib.filter
|
||
(x: lib.isList x &&
|
||
# If the matched path is in `namedOutputPaths`,
|
||
# it's a partial match of an output path where
|
||
# the output name isn't `out`
|
||
lib.all (o: !lib.hasPrefix (lib.head x) o) namedOutputPaths)
|
||
(builtins.split "(${builtins.storeDir}/[${nixHashChars}]+-${name})" string)
|
||
else
|
||
[])
|
||
packages);
|
||
allPaths = lib.concatStringsSep "\n" (lib.unique (sources ++ namedOutputPaths ++ outputPaths));
|
||
allPathsWithContext = builtins.appendContext allPaths context;
|
||
in
|
||
if builtins ? getContext then
|
||
writeText "string-references" allPathsWithContext
|
||
else
|
||
writeDirectReferencesToFile (writeText "string-file" string);
|
||
|
||
|
||
/* 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.
|
||
|
||
Example:
|
||
|
||
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;
|
||
|
||
/* Applies a list of patches to a source directory.
|
||
|
||
Example:
|
||
|
||
# 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";
|
||
}
|