Merge remote-tracking branch 'upstream/master' into indexed-store-path-outputs

This commit is contained in:
John Ericson 2022-04-19 20:30:12 +00:00
commit 6b61d7722d
11 changed files with 207 additions and 49 deletions

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@ -1 +1 @@
2.8.0 2.9.0

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- [CLI guideline](contributing/cli-guideline.md) - [CLI guideline](contributing/cli-guideline.md)
- [Release Notes](release-notes/release-notes.md) - [Release Notes](release-notes/release-notes.md)
- [Release X.Y (202?-??-??)](release-notes/rl-next.md) - [Release X.Y (202?-??-??)](release-notes/rl-next.md)
- [Release 2.8 (2022-04-19)](release-notes/rl-2.8.md)
- [Release 2.7 (2022-03-07)](release-notes/rl-2.7.md) - [Release 2.7 (2022-03-07)](release-notes/rl-2.7.md)
- [Release 2.6 (2022-01-24)](release-notes/rl-2.6.md) - [Release 2.6 (2022-01-24)](release-notes/rl-2.6.md)
- [Release 2.5 (2021-12-13)](release-notes/rl-2.5.md) - [Release 2.5 (2021-12-13)](release-notes/rl-2.5.md)

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# Release 2.8 (2022-04-19)
* New experimental command: `nix fmt`, which applies a formatter
defined by the `formatter.<system>` flake output to the Nix
expressions in a flake.
* Various Nix commands can now read expressions from standard input
using `--file -`.
* New experimental builtin function `builtins.fetchClosure` that
copies a closure from a binary cache at evaluation time and rewrites
it to content-addressed form (if it isn't already). Like
`builtins.storePath`, this allows importing pre-built store paths;
the difference is that it doesn't require the user to configure
binary caches and trusted public keys.
This function is only available if you enable the experimental
feature `fetch-closure`.
* New experimental feature: *impure derivations*. These are
derivations that can produce a different result every time they're
built. Here is an example:
```nix
stdenv.mkDerivation {
name = "impure";
__impure = true; # marks this derivation as impure
buildCommand = "date > $out";
}
```
Running `nix build` twice on this expression will build the
derivation twice, producing two different content-addressed store
paths. Like fixed-output derivations, impure derivations have access
to the network. Only fixed-output derivations and impure derivations
can depend on an impure derivation.
* `nix store make-content-addressable` has been renamed to `nix store
make-content-addressed`.
* The `nixosModule` flake output attribute has been renamed consistent
with the `.default` renames in Nix 2.7.
* `nixosModule``nixosModules.default`
As before, the old output will continue to work, but `nix flake check` will
issue a warning about it.
* `nix run` is now stricter in what it accepts: members of the `apps`
flake output are now required to be apps (as defined in [the
manual](https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-run.html#apps)),
and members of `packages` or `legacyPackages` must be derivations
(not apps).

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# Release X.Y (202?-??-??) # Release X.Y (202?-??-??)
* Various nix commands can now read expressions from stdin with `--file -`.
* `nix store make-content-addressable` has been renamed to `nix store
make-content-addressed`.
* New experimental builtin function `builtins.fetchClosure` that
copies a closure from a binary cache at evaluation time and rewrites
it to content-addressed form (if it isn't already). Like
`builtins.storePath`, this allows importing pre-built store paths;
the difference is that it doesn't require the user to configure
binary caches and trusted public keys.
This function is only available if you enable the experimental
feature `fetch-closure`.
* New experimental feature: *impure derivations*. These are
derivations that can produce a different result every time they're
built. Here is an example:
```nix
stdenv.mkDerivation {
name = "impure";
__impure = true; # marks this derivation as impure
buildCommand = "date > $out";
}
```
Running `nix build` twice on this expression will build the
derivation twice, producing two different content-addressed store
paths. Like fixed-output derivations, impure derivations have access
to the network. Only fixed-output derivations and impure derivations
can depend on an impure derivation.
* The `nixosModule` flake output attribute has been renamed consistent
with the `.default` renames in nix 2.7.
* `nixosModule``nixosModules.default`
As before, the old output will continue to work, but `nix flake check` will
issue a warning about it.
* `nix run` is now stricter wrt what it accepts:
* Members of `apps` are now required to be apps (as defined in [the manual](https://nixos.org/manual/nix/stable/command-ref/new-cli/nix3-run.html#apps))
* Member of `packages` or `legacyPackages` cannot be of type "app" when used by `nix run`.
* Add experimental *indexed store derivations* installable syntax, part of the * Add experimental *indexed store derivations* installable syntax, part of the
the `computed-derivations` experimental feature. the `computed-derivations` experimental feature.

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@ -35,7 +35,7 @@ struct InstallableDerivedPath : Installable
/** /**
* Return the rewrites that are needed to resolve a string whose context is * Return the rewrites that are needed to resolve a string whose context is
* included in `dependencies` * included in `dependencies`.
*/ */
StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies) StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies)
{ {
@ -51,7 +51,7 @@ StringPairs resolveRewrites(Store & store, const BuiltPaths dependencies)
} }
/** /**
* Resolve the given string assuming the given context * Resolve the given string assuming the given context.
*/ */
std::string resolveString(Store & store, const std::string & toResolve, const BuiltPaths dependencies) std::string resolveString(Store & store, const std::string & toResolve, const BuiltPaths dependencies)
{ {

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@ -528,6 +528,16 @@ struct CmdFlakeCheck : FlakeCommand
} }
} }
else if (name == "formatter") {
state->forceAttrs(vOutput, pos);
for (auto & attr : *vOutput.attrs) {
checkSystemName(attr.name, *attr.pos);
checkApp(
fmt("%s.%s", name, attr.name),
*attr.value, *attr.pos);
}
}
else if (name == "packages" || name == "devShells") { else if (name == "packages" || name == "devShells") {
state->forceAttrs(vOutput, pos); state->forceAttrs(vOutput, pos);
for (auto & attr : *vOutput.attrs) { for (auto & attr : *vOutput.attrs) {
@ -1011,6 +1021,7 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
|| (attrPath.size() == 1 && ( || (attrPath.size() == 1 && (
attrPath[0] == "defaultPackage" attrPath[0] == "defaultPackage"
|| attrPath[0] == "devShell" || attrPath[0] == "devShell"
|| attrPath[0] == "formatter"
|| attrPath[0] == "nixosConfigurations" || attrPath[0] == "nixosConfigurations"
|| attrPath[0] == "nixosModules" || attrPath[0] == "nixosModules"
|| attrPath[0] == "defaultApp" || attrPath[0] == "defaultApp"
@ -1027,7 +1038,7 @@ struct CmdFlakeShow : FlakeCommand, MixJSON
} }
else if ( else if (
(attrPath.size() == 2 && (attrPath[0] == "defaultPackage" || attrPath[0] == "devShell")) (attrPath.size() == 2 && (attrPath[0] == "defaultPackage" || attrPath[0] == "devShell" || attrPath[0] == "formatter"))
|| (attrPath.size() == 3 && (attrPath[0] == "checks" || attrPath[0] == "packages" || attrPath[0] == "devShells")) || (attrPath.size() == 3 && (attrPath[0] == "checks" || attrPath[0] == "packages" || attrPath[0] == "devShells"))
) )
{ {

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src/nix/fmt.cc Normal file
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#include "command.hh"
#include "run.hh"
using namespace nix;
struct CmdFmt : SourceExprCommand {
std::vector<std::string> args;
CmdFmt() { expectArgs({.label = "args", .handler = {&args}}); }
std::string description() override {
return "reformat your code in the standard style";
}
std::string doc() override {
return
#include "fmt.md"
;
}
Category category() override { return catSecondary; }
Strings getDefaultFlakeAttrPaths() override {
return Strings{"formatter." + settings.thisSystem.get()};
}
Strings getDefaultFlakeAttrPathPrefixes() override { return Strings{}; }
void run(ref<Store> store) {
auto evalState = getEvalState();
auto evalStore = getEvalStore();
auto installable = parseInstallable(store, ".");
auto app = installable->toApp(*evalState).resolve(evalStore, store);
Strings programArgs{app.program};
// Propagate arguments from the CLI
if (args.empty()) {
// Format the current flake out of the box
programArgs.push_back(".");
} else {
// User wants more power, let them decide which paths to include/exclude
for (auto &i : args) {
programArgs.push_back(i);
}
}
runProgramInStore(store, app.program, programArgs);
};
};
static auto r2 = registerCommand<CmdFmt>("fmt");

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src/nix/fmt.md Normal file
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R""(
# Examples
With [nixpkgs-fmt](https://github.com/nix-community/nixpkgs-fmt):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixpkgs-fmt;
};
}
```
- Format the current flake: `$ nix fmt`
- Format a specific folder or file: `$ nix fmt ./folder ./file.nix`
With [nixfmt](https://github.com/serokell/nixfmt):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.nixfmt;
};
}
```
- Format specific files: `$ nix fmt ./file1.nix ./file2.nix`
With [Alejandra](https://github.com/kamadorueda/alejandra):
```nix
# flake.nix
{
outputs = { nixpkgs, self }: {
formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
};
}
```
- Format the current flake: `$ nix fmt`
- Format a specific folder or file: `$ nix fmt ./folder ./file.nix`
# Description
`nix fmt` will rewrite all Nix files (\*.nix) to a canonical format
using the formatter specified in your flake.
)""

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tests/fmt.sh Normal file
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source common.sh
set -o pipefail
clearStore
rm -rf $TEST_HOME/.cache $TEST_HOME/.config $TEST_HOME/.local
cp ./simple.nix ./simple.builder.sh ./fmt.simple.sh ./config.nix $TEST_HOME
cd $TEST_HOME
nix fmt --help | grep "Format"
cat << EOF > flake.nix
{
outputs = _: {
formatter.$system =
with import ./config.nix;
mkDerivation {
name = "formatter";
buildCommand = "mkdir -p \$out/bin; cp \${./fmt.simple.sh} \$out/bin/formatter";
};
};
}
EOF
nix fmt ./file ./folder | grep 'Formatting: ./file ./folder'
nix flake check
nix flake show | grep -P "package 'formatter'"
clearStore

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tests/fmt.simple.sh Executable file
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echo Formatting: "${@}"

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@ -80,6 +80,7 @@ nix_tests = \
post-hook.sh \ post-hook.sh \
function-trace.sh \ function-trace.sh \
flake-local-settings.sh \ flake-local-settings.sh \
fmt.sh \
eval-store.sh \ eval-store.sh \
why-depends.sh \ why-depends.sh \
import-derivation.sh \ import-derivation.sh \