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Refactor default.nix to follow Nix Flakes patterns

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This commit is contained in:
Quentin Dufour 2022-07-25 14:58:47 +02:00 committed by Alex Auvolat
parent ac98769009
commit 71d4cf42f1
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GPG Key ID: 0E496D15096376BE
4 changed files with 200 additions and 188 deletions
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87
.drone.yml
View File

@ -36,7 +36,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation -A release.inputDerivation
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation
- name: code quality
image: nixpkgs/nix:nixos-22.05
@ -57,7 +57,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target x86_64-unknown-linux-musl --arg release false --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.amd64.debug --argstr git_version $DRONE_COMMIT
- nix-shell --attr rust --run "./script/not-dynamic.sh result/bin/garage"
- name: unit + func tests
@ -70,12 +70,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- |
nix-build \
--no-build-output \
--option log-lines 100 \
--argstr target x86_64-unknown-linux-musl \
--argstr compileMode test
- nix-build --no-build-output --attr test.amd64
- ./result/bin/garage_api-*
- ./result/bin/garage_model-*
- ./result/bin/garage_rpc-*
@ -93,7 +88,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target x86_64-unknown-linux-musl --arg release false --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.amd64.debug --argstr git_version $DRONE_COMMIT
- nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
trigger:
@ -107,7 +102,7 @@ trigger:
---
kind: pipeline
type: docker
name: release-linux-x86_64
name: release-linux-amd64
volumes:
- name: nix_store
@ -116,20 +111,18 @@ volumes:
- name: nix_config
temp: {}
environment:
TARGET: x86_64-unknown-linux-musl
steps:
- name: setup nix
- name: nix maintainance
image: nixpkgs/nix:nixos-22.05
volumes:
- name: nix_store
path: /nix
path: /mnt
- name: nix_config
path: /etc/nix
commands:
- cp nix/nix.conf /etc/nix/nix.conf
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation -A release.inputDerivation
- "[ -d /mnt/store/3vpyn2qz5ay057nq9x68sh0r328d77ng-nix-2.8.1/ ] || (mkdir -p /mnt/store && cp -r /nix/store/* /mnt/store/)"
- "[ -d /mnt/var/ ] || cp -r /nix/var /mnt/"
- cp nix/nix.conf /etc/nix/nix.conf
- name: build
image: nixpkgs/nix:nixos-22.05
@ -139,7 +132,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target $TARGET --arg release true --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.amd64.release --argstr git_version $DRONE_COMMIT
- nix-shell --attr rust --run "./script/not-dynamic.sh result/bin/garage"
- name: integration
@ -195,7 +188,7 @@ trigger:
---
kind: pipeline
type: docker
name: release-linux-i686
name: release-linux-i386
volumes:
- name: nix_store
@ -204,20 +197,18 @@ volumes:
- name: nix_config
temp: {}
environment:
TARGET: i686-unknown-linux-musl
steps:
- name: setup nix
- name: nix maintainance
image: nixpkgs/nix:nixos-22.05
volumes:
- name: nix_store
path: /nix
path: /mnt
- name: nix_config
path: /etc/nix
commands:
- cp nix/nix.conf /etc/nix/nix.conf
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation -A release.inputDerivation
- "[ -d /mnt/store/3vpyn2qz5ay057nq9x68sh0r328d77ng-nix-2.8.1/ ] || (mkdir -p /mnt/store && cp -r /nix/store/* /mnt/store/)"
- "[ -d /mnt/var/ ] || cp -r /nix/var /mnt/"
- cp nix/nix.conf /etc/nix/nix.conf
- name: build
image: nixpkgs/nix:nixos-22.05
@ -227,7 +218,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target $TARGET --arg release true --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.i386.release --argstr git_version $DRONE_COMMIT
- nix-shell --attr rust --run "./script/not-dynamic.sh result/bin/garage"
- name: integration
@ -282,7 +273,7 @@ trigger:
---
kind: pipeline
type: docker
name: release-linux-aarch64
name: release-linux-arm64
volumes:
- name: nix_store
@ -291,20 +282,18 @@ volumes:
- name: nix_config
temp: {}
environment:
TARGET: aarch64-unknown-linux-musl
steps:
- name: setup nix
- name: nix maintainance
image: nixpkgs/nix:nixos-22.05
volumes:
- name: nix_store
path: /nix
path: /mnt
- name: nix_config
path: /etc/nix
commands:
- cp nix/nix.conf /etc/nix/nix.conf
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation -A release.inputDerivation
- "[ -d /mnt/store/3vpyn2qz5ay057nq9x68sh0r328d77ng-nix-2.8.1/ ] || (mkdir -p /mnt/store && cp -r /nix/store/* /mnt/store/)"
- "[ -d /mnt/var/ ] || cp -r /nix/var /mnt/"
- cp nix/nix.conf /etc/nix/nix.conf
- name: build
image: nixpkgs/nix:nixos-22.05
@ -314,7 +303,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target $TARGET --arg release true --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.arm64.release --argstr git_version $DRONE_COMMIT
- nix-shell --attr rust --run "./script/not-dynamic.sh result/bin/garage"
- name: push static binary
@ -359,7 +348,7 @@ trigger:
---
kind: pipeline
type: docker
name: release-linux-armv6l
name: release-linux-arm
volumes:
- name: nix_store
@ -368,20 +357,18 @@ volumes:
- name: nix_config
temp: {}
environment:
TARGET: armv6l-unknown-linux-musleabihf
steps:
- name: setup nix
- name: nix maintainance
image: nixpkgs/nix:nixos-22.05
volumes:
- name: nix_store
path: /nix
path: /mnt
- name: nix_config
path: /etc/nix
commands:
- cp nix/nix.conf /etc/nix/nix.conf
- nix-build --no-build-output --no-out-link shell.nix -A rust.inputDerivation -A integration.inputDerivation -A release.inputDerivation
- "[ -d /mnt/store/3vpyn2qz5ay057nq9x68sh0r328d77ng-nix-2.8.1/ ] || (mkdir -p /mnt/store && cp -r /nix/store/* /mnt/store/)"
- "[ -d /mnt/var/ ] || cp -r /nix/var /mnt/"
- cp nix/nix.conf /etc/nix/nix.conf
- name: build
image: nixpkgs/nix:nixos-22.05
@ -391,7 +378,7 @@ steps:
- name: nix_config
path: /etc/nix
commands:
- nix-build --no-build-output --argstr target $TARGET --arg release true --argstr git_version $DRONE_COMMIT
- nix-build --no-build-output --attr pkgs.arm.release --argstr git_version $DRONE_COMMIT
- nix-shell --attr rust --run "./script/not-dynamic.sh result/bin/garage"
- name: push static binary
@ -459,10 +446,10 @@ steps:
- nix-shell --attr release --run "refresh_index"
depends_on:
- release-linux-x86_64
- release-linux-i686
- release-linux-aarch64
- release-linux-armv6l
- release-linux-amd64
- release-linux-i386
- release-linux-arm64
- release-linux-arm
trigger:
event:
@ -471,6 +458,6 @@ trigger:
---
kind: signature
hmac: 12b06094741a9b6da448e3a176d2fc37b2c261ab87acefa60a070e67a55352b0
hmac: 9789d5fd470fc4273adcfd05946833268d1e466462c5f36abeb8f607d62fdb4b
...

157
default.nix
View File

@ -1,149 +1,32 @@
{
system ? builtins.currentSystem,
release ? false,
target ? "x86_64-unknown-linux-musl",
compileMode ? null,
git_version ? null,
}:
with import ./nix/common.nix;
let
crossSystem = { config = target; };
in let
log = v: builtins.trace v v;
compile = import ./nix/compile.nix;
build_debug_and_release = (target: {
debug = (compile { inherit target; release = false; }).workspace.garage { compileMode = "build"; };
release = (compile { inherit target; release = true; }).workspace.garage { compileMode = "build"; };
});
pkgs = import pkgsSrc {
inherit system crossSystem;
overlays = [ cargo2nixOverlay ];
in {
pkgs = {
amd64 = build_debug_and_release "x86_64-unknown-linux-musl";
i386 = build_debug_and_release "i686-unknown-linux-musl";
arm64 = build_debug_and_release "aarch64-unknown-linux-musl";
arm = build_debug_and_release "armv6l-unknown-linux-musleabihf";
};
/*
Rust and Nix triples are not the same. Cargo2nix has a dedicated library
to convert Nix triples to Rust ones. We need this conversion as we want to
set later options linked to our (rust) target in a generic way. Not only
the triple terminology is different, but also the "roles" are named differently.
Nix uses a build/host/target terminology where Nix's "host" maps to Cargo's "target".
*/
rustTarget = log (pkgs.rustBuilder.rustLib.rustTriple pkgs.stdenv.hostPlatform);
/*
Cargo2nix is built for rustOverlay which installs Rust from Mozilla releases.
We want our own Rust to avoid incompatibilities, like we had with musl 1.2.0.
rustc was built with musl < 1.2.0 and nix shipped musl >= 1.2.0 which lead to compilation breakage.
So we want a Rust release that is bound to our Nix repository to avoid these problems.
See here for more info: https://musl.libc.org/time64.html
Because Cargo2nix does not support the Rust environment shipped by NixOS,
we emulate the structure of the Rust object created by rustOverlay.
In practise, rustOverlay ships rustc+cargo in a single derivation while
NixOS ships them in separate ones. We reunite them with symlinkJoin.
*/
rustChannel = pkgs.symlinkJoin {
name ="rust-channel";
paths = [
pkgs.rustPlatform.rust.rustc
pkgs.rustPlatform.rust.cargo
];
};
/*
Cargo2nix provides many overrides by default, you can take inspiration from them:
https://github.com/cargo2nix/cargo2nix/blob/master/overlay/overrides.nix
You can have a complete list of the available options by looking at the overriden object, mkcrate:
https://github.com/cargo2nix/cargo2nix/blob/master/overlay/mkcrate.nix
*/
overrides = pkgs.rustBuilder.overrides.all ++ [
/*
[1] We need to alter Nix hardening to make static binaries: PIE,
Position Independent Executables seems to be supported only on amd64. Having
this flag set either 1. make our executables crash or 2. compile as dynamic on some platforms.
Here, we deactivate it. Later (find `codegenOpts`), we reactivate it for supported targets
(only amd64 curently) through the `-static-pie` flag.
PIE is a feature used by ASLR, which helps mitigate security issues.
Learn more about Nix Hardening at: https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/cc-wrapper/add-hardening.sh
*/
(pkgs.rustBuilder.rustLib.makeOverride {
name = "garage";
overrideAttrs = drv: { hardeningDisable = [ "pie" ]; };
})
(pkgs.rustBuilder.rustLib.makeOverride {
name = "garage_rpc";
/*
[2] We want to inject the git version while keeping the build deterministic.
As we do not want to consider the .git folder as part of the input source,
we ask the user (the CI often) to pass the value to Nix.
*/
overrideAttrs = drv:
(if git_version != null then {
preConfigure = ''
${drv.preConfigure or ""}
export GIT_VERSION="${git_version}"
'';
} else {});
/*
[3] We ship some parts of the code disabled by default by putting them behind a flag.
It speeds up the compilation (when the feature is not required) and released crates have less dependency by default (less attack surface, disk space, etc.).
But we want to ship these additional features when we release Garage.
In the end, we chose to exclude all features from debug builds while putting (all of) them in the release builds.
Currently, the only feature of Garage is kubernetes-discovery from the garage_rpc crate.
*/
overrideArgs = old: {
features = if release then [ "kubernetes-discovery" ] else [];
test = {
amd64 = let
pkgs = import pkgsSrc { };
rustPkgs = compile { target = "x86_64-unknown-linux-musl"; };
in
pkgs.symlinkJoin {
name ="garage-tests";
paths = builtins.map (key: rustPkgs.workspace.${key} { compileMode = "test"; }) (builtins.attrNames rustPkgs.workspace);
};
})
];
packageFun = import ./Cargo.nix;
/*
We compile fully static binaries with musl to simplify deployment on most systems.
When possible, we reactivate PIE hardening (see above).
Also, if you set the RUSTFLAGS environment variable, the following parameters will
be ignored.
For more information on static builds, please refer to Rust's RFC 1721.
https://rust-lang.github.io/rfcs/1721-crt-static.html#specifying-dynamicstatic-c-runtime-linkage
*/
codegenOpts = {
"armv6l-unknown-linux-musleabihf" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* compile as dynamic with static-pie */
"aarch64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
"i686-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
"x86_64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static-pie" ];
};
/*
The following definition is not elegant as we use a low level function of Cargo2nix
that enables us to pass our custom rustChannel object. We need this low level definition
to pass Nix's Rust toolchains instead of Mozilla's one.
target is mandatory but must be kept to null to allow cargo2nix to set it to the appropriate value
for each crate.
*/
rustPkgs = pkgs.rustBuilder.makePackageSet {
inherit packageFun rustChannel release codegenOpts;
packageOverrides = overrides;
target = null;
buildRustPackages = pkgs.buildPackages.rustBuilder.makePackageSet {
inherit rustChannel packageFun codegenOpts;
packageOverrides = overrides;
target = null;
};
};
in
if compileMode == "test"
then pkgs.symlinkJoin {
name ="garage-tests";
paths = builtins.map (key: rustPkgs.workspace.${key} { inherit compileMode; }) (builtins.attrNames rustPkgs.workspace);
}
else rustPkgs.workspace.garage { inherit compileMode; }
}

140
nix/compile.nix Normal file
View File

@ -0,0 +1,140 @@
{
system ? builtins.currentSystem,
target ? "x86_64-unknown-linux-musl",
release ? false,
git_version ? null,
}:
with import ./common.nix;
let
crossSystem = { config = target; };
log = v: builtins.trace v v;
pkgs = import pkgsSrc {
inherit system crossSystem;
overlays = [ cargo2nixOverlay ];
};
/*
Rust and Nix triples are not the same. Cargo2nix has a dedicated library
to convert Nix triples to Rust ones. We need this conversion as we want to
set later options linked to our (rust) target in a generic way. Not only
the triple terminology is different, but also the "roles" are named differently.
Nix uses a build/host/target terminology where Nix's "host" maps to Cargo's "target".
*/
rustTarget = log (pkgs.rustBuilder.rustLib.rustTriple pkgs.stdenv.hostPlatform);
/*
Cargo2nix is built for rustOverlay which installs Rust from Mozilla releases.
We want our own Rust to avoid incompatibilities, like we had with musl 1.2.0.
rustc was built with musl < 1.2.0 and nix shipped musl >= 1.2.0 which lead to compilation breakage.
So we want a Rust release that is bound to our Nix repository to avoid these problems.
See here for more info: https://musl.libc.org/time64.html
Because Cargo2nix does not support the Rust environment shipped by NixOS,
we emulate the structure of the Rust object created by rustOverlay.
In practise, rustOverlay ships rustc+cargo in a single derivation while
NixOS ships them in separate ones. We reunite them with symlinkJoin.
*/
rustChannel = pkgs.symlinkJoin {
name ="rust-channel";
paths = [
pkgs.rustPlatform.rust.rustc
pkgs.rustPlatform.rust.cargo
];
};
/*
Cargo2nix provides many overrides by default, you can take inspiration from them:
https://github.com/cargo2nix/cargo2nix/blob/master/overlay/overrides.nix
You can have a complete list of the available options by looking at the overriden object, mkcrate:
https://github.com/cargo2nix/cargo2nix/blob/master/overlay/mkcrate.nix
*/
overrides = pkgs.rustBuilder.overrides.all ++ [
/*
[1] We need to alter Nix hardening to make static binaries: PIE,
Position Independent Executables seems to be supported only on amd64. Having
this flag set either 1. make our executables crash or 2. compile as dynamic on some platforms.
Here, we deactivate it. Later (find `codegenOpts`), we reactivate it for supported targets
(only amd64 curently) through the `-static-pie` flag.
PIE is a feature used by ASLR, which helps mitigate security issues.
Learn more about Nix Hardening at: https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/cc-wrapper/add-hardening.sh
*/
(pkgs.rustBuilder.rustLib.makeOverride {
name = "garage";
overrideAttrs = drv: { hardeningDisable = [ "pie" ]; };
})
(pkgs.rustBuilder.rustLib.makeOverride {
name = "garage_rpc";
/*
[2] We want to inject the git version while keeping the build deterministic.
As we do not want to consider the .git folder as part of the input source,
we ask the user (the CI often) to pass the value to Nix.
*/
overrideAttrs = drv:
(if git_version != null then {
preConfigure = ''
${drv.preConfigure or ""}
export GIT_VERSION="${git_version}"
'';
} else {});
/*
[3] We ship some parts of the code disabled by default by putting them behind a flag.
It speeds up the compilation (when the feature is not required) and released crates have less dependency by default (less attack surface, disk space, etc.).
But we want to ship these additional features when we release Garage.
In the end, we chose to exclude all features from debug builds while putting (all of) them in the release builds.
Currently, the only feature of Garage is kubernetes-discovery from the garage_rpc crate.
*/
overrideArgs = old: {
features = if release then [ "kubernetes-discovery" ] else [];
};
})
];
packageFun = import ../Cargo.nix;
/*
We compile fully static binaries with musl to simplify deployment on most systems.
When possible, we reactivate PIE hardening (see above).
Also, if you set the RUSTFLAGS environment variable, the following parameters will
be ignored.
For more information on static builds, please refer to Rust's RFC 1721.
https://rust-lang.github.io/rfcs/1721-crt-static.html#specifying-dynamicstatic-c-runtime-linkage
*/
codegenOpts = {
"armv6l-unknown-linux-musleabihf" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* compile as dynamic with static-pie */
"aarch64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
"i686-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static" ]; /* segfault with static-pie */
"x86_64-unknown-linux-musl" = [ "target-feature=+crt-static" "link-arg=-static-pie" ];
};
in
/*
The following definition is not elegant as we use a low level function of Cargo2nix
that enables us to pass our custom rustChannel object. We need this low level definition
to pass Nix's Rust toolchains instead of Mozilla's one.
target is mandatory but must be kept to null to allow cargo2nix to set it to the appropriate value
for each crate.
*/
pkgs.rustBuilder.makePackageSet {
inherit packageFun rustChannel release codegenOpts;
packageOverrides = overrides;
target = null;
buildRustPackages = pkgs.buildPackages.rustBuilder.makePackageSet {
inherit rustChannel packageFun codegenOpts;
packageOverrides = overrides;
target = null;
};
}

2
nix/nix.conf
View File

@ -5,3 +5,5 @@ cores = 4
log-lines = 200
filter-syscalls = false
sandbox = false
keep-outputs = true
keep-derivations = true