Merge pull request 'Fix & simplify CI using Woodpecker' (#706) from nix-improvements into main

Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/706

14 files changed, 150 insertions, 547 deletions

diff --git a/.drone.yml b/.drone.yml
deleted file mode 100644
index d79a9277..00000000
--- a/.drone.yml
+++ /dev/null
@@ -1,300 +0,0 @@
----
-kind: pipeline
-name: default
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: check formatting
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-shell --attr rust --run "cargo fmt -- --check"
-
-  - name: build
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr clippy.amd64 --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-
-  - name: unit + func tests
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      GARAGE_TEST_INTEGRATION_EXE: result-bin/bin/garage
-      GARAGE_TEST_INTEGRATION_PATH: tmp-garage-integration
-    commands:
-      - nix-build --no-build-output --attr clippy.amd64 --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-build --no-build-output --attr test.amd64
-      - ./result/bin/garage_db-*
-      - ./result/bin/garage_api-*
-      - ./result/bin/garage_model-*
-      - ./result/bin/garage_rpc-*
-      - ./result/bin/garage_table-*
-      - ./result/bin/garage_util-*
-      - ./result/bin/garage_web-*
-      - ./result/bin/garage-*
-      - ./result/bin/integration-* || (cat tmp-garage-integration/stderr.log; false)
-      - rm result
-      - rm -rv tmp-garage-integration
-
-  - name: integration tests
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr clippy.amd64 --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
-
-trigger:
-  event:
-  - custom
-  - push
-  - pull_request
-  - tag
-  - cron
-
----
-kind: pipeline
-type: docker
-name: release-linux-amd64
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: build
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr pkgs.amd64.release --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr rust --run "./script/not-dynamic.sh result-bin/bin/garage"
-
-  - name: integration tests
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
-
-  - name: upgrade tests
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-shell --attr integration --run "./script/test-upgrade.sh v0.8.4 x86_64-unknown-linux-musl" || (cat /tmp/garage.log; false)
-
-  - name: push static binary
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      AWS_ACCESS_KEY_ID:
-        from_secret: garagehq_aws_access_key_id
-      AWS_SECRET_ACCESS_KEY:
-        from_secret: garagehq_aws_secret_access_key
-      TARGET: "x86_64-unknown-linux-musl"
-    commands:
-      - nix-shell --attr release --run "to_s3"
-
-  - name: docker build and publish
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      DOCKER_AUTH:
-        from_secret: docker_auth
-      DOCKER_PLATFORM: "linux/amd64"
-      CONTAINER_NAME: "dxflrs/amd64_garage"
-      HOME: "/kaniko"
-    commands:
-      - mkdir -p /kaniko/.docker
-      - echo $DOCKER_AUTH > /kaniko/.docker/config.json
-      - export CONTAINER_TAG=${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr release --run "to_docker"
-
-
-trigger:
-  event:
-  - promote
-  - cron
-
----
-kind: pipeline
-type: docker
-name: release-linux-i386
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: build
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr pkgs.i386.release --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr rust --run "./script/not-dynamic.sh result-bin/bin/garage"
-
-  - name: integration tests
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
-
-  - name: upgrade tests
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-shell --attr integration --run "./script/test-upgrade.sh v0.8.4 i686-unknown-linux-musl" || (cat /tmp/garage.log; false)
-
-  - name: push static binary
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      AWS_ACCESS_KEY_ID:
-        from_secret: garagehq_aws_access_key_id
-      AWS_SECRET_ACCESS_KEY:
-        from_secret: garagehq_aws_secret_access_key
-      TARGET: "i686-unknown-linux-musl"
-    commands:
-      - nix-shell --attr release --run "to_s3"
-
-  - name: docker build and publish
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      DOCKER_AUTH:
-        from_secret: docker_auth
-      DOCKER_PLATFORM: "linux/386"
-      CONTAINER_NAME: "dxflrs/386_garage"
-      HOME: "/kaniko"
-    commands:
-      - mkdir -p /kaniko/.docker
-      - echo $DOCKER_AUTH > /kaniko/.docker/config.json
-      - export CONTAINER_TAG=${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr release --run "to_docker"
-
-trigger:
-  event:
-  - promote
-  - cron
-
----
-kind: pipeline
-type: docker
-name: release-linux-arm64
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: build
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr pkgs.arm64.release --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr rust --run "./script/not-dynamic.sh result-bin/bin/garage"
-
-  - name: push static binary
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      AWS_ACCESS_KEY_ID:
-        from_secret: garagehq_aws_access_key_id
-      AWS_SECRET_ACCESS_KEY:
-        from_secret: garagehq_aws_secret_access_key
-      TARGET: "aarch64-unknown-linux-musl"
-    commands:
-      - nix-shell --attr release --run "to_s3"
-
-  - name: docker build and publish
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      DOCKER_AUTH:
-        from_secret: docker_auth
-      DOCKER_PLATFORM: "linux/arm64"
-      CONTAINER_NAME: "dxflrs/arm64_garage"
-      HOME: "/kaniko"
-    commands:
-      - mkdir -p /kaniko/.docker
-      - echo $DOCKER_AUTH > /kaniko/.docker/config.json
-      - export CONTAINER_TAG=${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr release --run "to_docker"
-
-trigger:
-  event:
-  - promote
-  - cron
-
----
-kind: pipeline
-type: docker
-name: release-linux-arm
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: build
-    image: nixpkgs/nix:nixos-22.05
-    commands:
-      - nix-build --no-build-output --attr pkgs.arm.release --argstr git_version ${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr rust --run "./script/not-dynamic.sh result-bin/bin/garage"
-
-  - name: push static binary
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      AWS_ACCESS_KEY_ID:
-        from_secret: garagehq_aws_access_key_id
-      AWS_SECRET_ACCESS_KEY:
-        from_secret: garagehq_aws_secret_access_key
-      TARGET: "armv6l-unknown-linux-musleabihf"
-    commands:
-      - nix-shell --attr release --run "to_s3"
-
-  - name: docker build and publish
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      DOCKER_AUTH:
-        from_secret: docker_auth
-      DOCKER_PLATFORM: "linux/arm"
-      CONTAINER_NAME: "dxflrs/arm_garage"
-      HOME: "/kaniko"
-    commands:
-      - mkdir -p /kaniko/.docker
-      - echo $DOCKER_AUTH > /kaniko/.docker/config.json
-      - export CONTAINER_TAG=${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr release --run "to_docker"
-
-trigger:
-  event:
-  - promote
-  - cron
-
----
-kind: pipeline
-type: docker
-name: refresh-release-page
-
-node:
-  nix-daemon: 1
-
-steps:
-  - name: multiarch-docker
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      DOCKER_AUTH:
-        from_secret: docker_auth
-      HOME: "/root"
-    commands:
-      - mkdir -p /root/.docker
-      - echo $DOCKER_AUTH > /root/.docker/config.json
-      - export CONTAINER_TAG=${DRONE_TAG:-$DRONE_COMMIT}
-      - nix-shell --attr release --run "multiarch_docker"
-  - name: refresh-index
-    image: nixpkgs/nix:nixos-22.05
-    environment:
-      AWS_ACCESS_KEY_ID:
-        from_secret: garagehq_aws_access_key_id
-      AWS_SECRET_ACCESS_KEY:
-        from_secret: garagehq_aws_secret_access_key
-    commands:
-      - mkdir -p /etc/nix && cp nix/nix.conf /etc/nix/nix.conf
-      - nix-shell --attr release --run "refresh_index"
-
-depends_on:
-  - release-linux-amd64
-  - release-linux-i386
-  - release-linux-arm64
-  - release-linux-arm
-
-trigger:
-  event:
-  - promote
-  - cron
-
----
-kind: signature
-hmac: 0c4b57eb4b27b7c6a6ff21ab87f0767fe3eb90f5d95d5cbcdccf794e9d2a5d86
-
-...
diff --git a/.woodpecker/debug.yaml b/.woodpecker/debug.yaml
index 9486f672..59ae8c06 100644
--- a/.woodpecker/debug.yaml
+++ b/.woodpecker/debug.yaml
@@ -10,7 +10,7 @@ steps:
   - name: check formatting
     image: nixpkgs/nix:nixos-22.05
     commands:
-      - nix-shell --attr rust --run "cargo fmt -- --check"
+      - nix-shell --attr devShell --run "cargo fmt -- --check"
 
   - name: build
     image: nixpkgs/nix:nixos-22.05
@@ -41,4 +41,4 @@ steps:
     image: nixpkgs/nix:nixos-22.05
     commands:
       - nix-build --no-build-output --attr clippy.amd64 --argstr git_version ${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
-      - nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
+      - nix-shell --attr ci --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
diff --git a/.woodpecker/publish.yaml b/.woodpecker/publish.yaml
index b45d379c..739af2c4 100644
--- a/.woodpecker/publish.yaml
+++ b/.woodpecker/publish.yaml
@@ -16,17 +16,14 @@ steps:
         target: AWS_SECRET_ACCESS_KEY
     commands:
       - mkdir -p /etc/nix && cp nix/nix.conf /etc/nix/nix.conf
-      - nix-shell --attr release --run "refresh_index"
+      - nix-shell --attr ci --run "refresh_index"
 
-#  - name: multiarch-docker
-#    image: nixpkgs/nix:nixos-22.05
-#    environment:
-#      HOME: "/root"
-#    secrets:
-#      - docker_auth
-#    commands:
-#      - mkdir -p /root/.docker
-#      - echo $DOCKER_AUTH > /root/.docker/config.json
-#      - sha512sum /root/.docker/config.json
-#      - export CONTAINER_TAG=${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
-#      - nix-shell --attr release --run "multiarch_docker"
+  - name: multiarch-docker
+    image: nixpkgs/nix:nixos-22.05
+    secrets:
+      - docker_auth
+    commands:
+      - mkdir -p /root/.docker
+      - echo $DOCKER_AUTH > /root/.docker/config.json
+      - export CONTAINER_TAG=${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
+      - nix-shell --attr ci --run "multiarch_docker"
diff --git a/.woodpecker/release.yaml b/.woodpecker/release.yaml
index 8580441c..c57d7272 100644
--- a/.woodpecker/release.yaml
+++ b/.woodpecker/release.yaml
@@ -19,12 +19,17 @@ steps:
     image: nixpkgs/nix:nixos-22.05
     commands:
       - nix-build --no-build-output --attr pkgs.${ARCH}.release --argstr git_version ${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
-      - nix-shell --attr rust --run "./script/not-dynamic.sh result-bin/bin/garage"
+
+  - name: check is static binary
+    image: nixpkgs/nix:nixos-22.05
+    commands:
+      - nix-build --no-build-output --attr pkgs.${ARCH}.release --argstr git_version ${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
+      - nix-shell --attr ci --run "./script/not-dynamic.sh result-bin/bin/garage"
 
   - name: integration tests
     image: nixpkgs/nix:nixos-22.05
     commands:
-      - nix-shell --attr integration --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
+      - nix-shell --attr ci --run ./script/test-smoke.sh || (cat /tmp/garage.log; false)
     when:
       - matrix:
           ARCH: amd64
@@ -34,7 +39,7 @@ steps:
   - name: upgrade tests
     image: nixpkgs/nix:nixos-22.05
     commands:
-      - nix-shell --attr integration --run "./script/test-upgrade.sh v0.8.4 x86_64-unknown-linux-musl" || (cat /tmp/garage.log; false)
+      - nix-shell --attr ci --run "./script/test-upgrade.sh v0.8.4 x86_64-unknown-linux-musl" || (cat /tmp/garage.log; false)
     when:
       - matrix:
           ARCH: amd64
@@ -49,19 +54,17 @@ steps:
       - source: garagehq_aws_secret_access_key
         target: AWS_SECRET_ACCESS_KEY
     commands:
-      - nix-shell --attr release --run "to_s3_woodpecker"
+      - nix-shell --attr ci --run "to_s3"
 
-#  - name: docker build and publish
-#    image: nixpkgs/nix:nixos-22.05
-#    environment:
-#      DOCKER_PLATFORM: "linux/${ARCH}"
-#      CONTAINER_NAME: "dxflrs/${ARCH}_garage"
-#      HOME: "/kaniko"
-#    secrets:
-#      - docker_auth
-#    commands:
-#      - mkdir -p /kaniko/.docker
-#      - echo $DOCKER_AUTH > /kaniko/.docker/config.json
-#      - sha512sum /kaniko/.docker/config.json
-#      - export CONTAINER_TAG=${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
-#      - nix-shell --attr release --run "to_docker"
+  - name: docker build and publish
+    image: nixpkgs/nix:nixos-22.05
+    environment:
+      DOCKER_PLATFORM: "linux/${ARCH}"
+      CONTAINER_NAME: "dxflrs/${ARCH}_garage"
+    secrets:
+      - docker_auth
+    commands:
+      - mkdir -p /root/.docker
+      - echo $DOCKER_AUTH > /root/.docker/config.json
+      - export CONTAINER_TAG=${CI_COMMIT_TAG:-$CI_COMMIT_SHA}
+      - nix-shell --attr ci --run "to_docker"
diff --git a/doc/book/design/goals.md b/doc/book/design/goals.md
index 78ac7978..4efb6349 100644
--- a/doc/book/design/goals.md
+++ b/doc/book/design/goals.md
@@ -48,7 +48,5 @@ locations. They use Garage themselves for the following tasks:
 
 - As a backup target using `rclone` and `restic`
 
-- In the Drone continuous integration platform to store task logs
-
 The Deuxfleurs Garage cluster is a multi-site cluster currently composed of
 9 nodes in 3 physical locations.
diff --git a/doc/book/development/devenv.md b/doc/book/development/devenv.md
index dd3bdec0..88f8ba06 100644
--- a/doc/book/development/devenv.md
+++ b/doc/book/development/devenv.md
@@ -80,7 +80,7 @@ nix-build \
   --git_version $(git rev-parse HEAD)
 ```
 
-*The result is located in `result/bin`. You can pass arguments to cross compile: check `.drone.yml` for examples.*
+*The result is located in `result/bin`. You can pass arguments to cross compile: check `.woodpecker/release.yml` for examples.*
 
 If you modify a `Cargo.toml` or regenerate any `Cargo.lock`, you must run `cargo2nix`:
 
diff --git a/doc/book/development/miscellaneous-notes.md b/doc/book/development/miscellaneous-notes.md
index f0083ae5..a421943f 100644
--- a/doc/book/development/miscellaneous-notes.md
+++ b/doc/book/development/miscellaneous-notes.md
@@ -81,12 +81,9 @@ Our cache will be checked.
  - http://www.lpenz.org/articles/nixchannel/index.html
 
 
-## Drone
+## Woodpecker
 
-Do not try to set a build as trusted from the interface or the CLI tool,
-your request would be ignored. Instead, directly edit the database (table `repos`, column `repo_trusted`).
-
-Drone can do parallelism both at the step and the pipeline level. At the step level, parallelism is restricted to the same runner.
+Woodpecker can do parallelism both at the step and the pipeline level. At the step level, parallelism is restricted to the same runner.
 
 ## Building Docker containers
 
@@ -99,3 +96,4 @@ We were:
   - Unable to use the kaniko container provided by Google as we can't run arbitrary logic: we need to put our secret in .docker/config.json.
 
 Finally we chose to build kaniko through nix and use it in a `nix-shell`.
+We then switched to using kaniko from nixpkgs when it was packaged.
diff --git a/doc/book/development/release-process.md b/doc/book/development/release-process.md
index 3fed4add..0c6701c0 100644
--- a/doc/book/development/release-process.md
+++ b/doc/book/development/release-process.md
@@ -42,7 +42,7 @@ and the docker containers on Docker Hub.
 
 ## Automation
 
-We automated our release process with Nix and Drone to make it more reliable.
+We automated our release process with Nix and Woodpecker to make it more reliable.
 Here we describe how we have done in case you want to debug or improve it.
 
 ### Caching build steps
@@ -62,52 +62,31 @@ Sending to the cache is done through `nix copy`, for example:
 nix copy --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/etc/nix/signing-key.sec' result
 ```
 
-*Note that you need the signing key. In our case, it is stored as a secret in Drone.*
+*The signing key possessed by the Garage maintainers is required to update the Nix cache.*
 
-The previous command will only send the built packet and not its dependencies.
-To send its dependency, a tool named `nix-copy-closure` has been created but it is not compatible with the S3 protocol.
-
-Instead, you can use the following commands to list all the runtime dependencies:
+The previous command will only send the built package and not its dependencies.
+In the case of our CI pipeline, we want to cache all intermediate build steps
+as well. This can be done using this quite involved command (here as an example
+for the `pkgs.amd64.relase` package):
 
 ```bash
-nix copy \
-  --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/etc/nix/signing-key.sec' \
-  $(nix-store -qR result/)
+nix copy -j8 \
+    --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/etc/nix/nix-signing-key.sec' \
+    $(nix path-info pkgs.amd64.release --file default.nix --derivation --recursive | sed 's/\.drv$/.drv^*/')
 ```
 
-*We could also write this expression with xargs but this tool is not available in our container.*
-
-But in certain cases, we want to cache compile time dependencies also.
-For example, the Nix project does not provide binaries for cross compiling to i686 and thus we need to compile gcc on our own.
-We do not want to compile gcc each time, so even if it is a compile time dependency, we want to cache it.
+This command will simultaneously build all of the required Nix paths (using at
+most 8 parallel Nix builder jobs) and send the resulting objects to the cache.
 
-This time, the command is a bit more involved:
-
-```bash
-nix copy --to \
-  's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/etc/nix/signing-key.sec' \
-   $(nix-store -qR --include-outputs \
-     $(nix-instantiate))
-```
-
-This is the command we use in our CI as we expect the final binary to change, so we mainly focus on
-caching our development dependencies.
-
-*Currently there is no automatic garbage collection of the cache: we should monitor its growth.
-Hopefully, we can erase it totally without breaking any build, the next build will only be slower.*
-
-In practise, we concluded that we do not want to cache all the compilation dependencies.
-Instead, we want to cache the toolchain we use to build Garage each time we change it.
-So we removed from Drone any automatic update of the cache and instead handle them manually with:
+This can be run for all the Garage packages we build using the following command:
 
 ```
 source ~/.awsrc
-nix-shell --run 'refresh_toolchain'
+nix-shell --attr cache --run 'refresh_cache'
 ```
 
-Internally, it will run `nix-build` on  `nix/toolchain.nix` and send the output plus its depedencies to the cache.
-
-To erase the cache:
+We don't automate this step at each CI build, as *there is currently no automatic garbage collection of the cache.*
+This means we should also monitor the cache's size; if it ever becomes too big we can erase it with:
 
 ```
 mc rm --recursive --force 'garage/nix/'
@@ -157,9 +136,9 @@ nix-shell --run refresh_index
 
 If you want to compile for different architectures, you will need to repeat all these commands for each architecture.
 
-**In practise, and except for debugging, you will never directly run these commands. Release is handled by drone**
+**In practice, and except for debugging, you will never directly run these commands. Release is handled by Woodpecker.**
 
-### Drone
+### Drone (obsolete)
 
 Our instance is available at [https://drone.deuxfleurs.fr](https://drone.deuxfleurs.fr).  
 You need an account on [https://git.deuxfleurs.fr](https://git.deuxfleurs.fr) to use it.
diff --git a/flake.nix b/flake.nix
index 236b2310..06c74220 100644
--- a/flake.nix
+++ b/flake.nix
@@ -33,27 +33,57 @@
       compile = import ./nix/compile.nix;
     in
     flake-utils.lib.eachDefaultSystem (system:
-      let pkgs = nixpkgs.legacyPackages.${system};
-      in {
-        packages = {
-          default = (compile {
-            inherit system git_version;
-            pkgsSrc = nixpkgs;
-            cargo2nixOverlay = cargo2nix.overlays.default;
-            release = true;
-          }).workspace.garage { compileMode = "build"; };
-        };
-        devShell = (compile {
-          inherit system git_version;
-          pkgsSrc = nixpkgs;
-          cargo2nixOverlay = cargo2nix.overlays.default;
-          release = false;
-        }).workspaceShell { packages = with pkgs; [
-          cargo-audit
-          cargo-outdated
-          rustfmt
-          clang
-          mold
-        ]; };
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        packages =
+          let
+            packageFor = target: (compile {
+              inherit system git_version target;
+              pkgsSrc = nixpkgs;
+              cargo2nixOverlay = cargo2nix.overlays.default;
+              release = true;
+            }).workspace.garage { compileMode = "build"; };
+          in
+          {
+            # default = native release build
+            default = packageFor null;
+            # other = cross-compiled, statically-linked builds
+            amd64 = packageFor "x86_64-unknown-linux-musl";
+            i386 = packageFor "i686-unknown-linux-musl";
+            arm64 = packageFor "aarch64-unknown-linux-musl";
+            arm = packageFor "armv6l-unknown-linux-musl";
+          };
+
+        # ---- developpment shell, for making native builds only ----
+        devShells =
+          let
+            shellWithPackages = (packages: (compile {
+              inherit system git_version;
+              pkgsSrc = nixpkgs;
+              cargo2nixOverlay = cargo2nix.overlays.default;
+            }).workspaceShell { inherit packages; });
+          in
+          {
+            default = shellWithPackages
+              (with pkgs; [
+                rustfmt
+                clang
+                mold
+              ]);
+
+            # import the full shell using `nix develop .#full`
+            full = shellWithPackages (with pkgs; [
+              rustfmt
+              clang
+              mold
+              # ---- extra packages for dev tasks ----
+              cargo-audit
+              cargo-outdated
+              cargo-machete
+              nixpkgs-fmt
+            ]);
+          };
       });
 }
diff --git a/nix/common.nix b/nix/common.nix
index 323c3882..1ad809bb 100644
--- a/nix/common.nix
+++ b/nix/common.nix
@@ -14,4 +14,5 @@ rec {
   pkgsSrc = flake.defaultNix.inputs.nixpkgs;
   cargo2nix = flake.defaultNix.inputs.cargo2nix;
   cargo2nixOverlay = cargo2nix.overlays.default;
+  devShells = builtins.getAttr builtins.currentSystem flake.defaultNix.devShells;
 }
diff --git a/nix/kaniko.nix b/nix/kaniko.nix
deleted file mode 100644
index 8380fa2f..00000000
--- a/nix/kaniko.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-pkgs:
-pkgs.buildGoModule rec {
-  pname = "kaniko";
-  version = "1.9.2";
-
-  src = pkgs.fetchFromGitHub {
-    owner = "GoogleContainerTools";
-    repo = "kaniko";
-    rev = "v${version}";
-    sha256 = "dXQ0/o1qISv+sjNVIpfF85bkbM9sGOGwqVbWZpMWfMY=";
-  };
-
-  vendorSha256 = null;
-
-  checkPhase = "true";
-
-  meta = with pkgs.lib; {
-    description =
-      "kaniko is a tool to build container images from a Dockerfile, inside a container or Kubernetes cluster.";
-    homepage = "https://github.com/GoogleContainerTools/kaniko";
-    license = licenses.asl20;
-    platforms = platforms.linux;
-  };
-}
diff --git a/nix/manifest-tool.nix b/nix/manifest-tool.nix
deleted file mode 100644
index 1090a6ef..00000000
--- a/nix/manifest-tool.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-pkgs:
-pkgs.buildGoModule rec {
-  pname = "manifest-tool";
-  version = "2.0.5";
-
-  src = pkgs.fetchFromGitHub {
-    owner = "estesp";
-    repo = "manifest-tool";
-    rev = "v${version}";
-    sha256 = "hjCGKnE0yrlnF/VIzOwcDzmQX3Wft+21KCny/opqdLg=";
-  } + "/v2";
-
-  vendorSha256 = null;
-
-  checkPhase = "true";
-
-  meta = with pkgs.lib; {
-    description =
-      "Command line tool to create and query container image manifest list/indexes";
-    homepage = "https://github.com/estesp/manifest-tool";
-    license = licenses.asl20;
-    platforms = platforms.linux;
-  };
-}
diff --git a/nix/toolchain.nix b/nix/toolchain.nix
deleted file mode 100644
index c4fef9ab..00000000
--- a/nix/toolchain.nix
+++ /dev/null
@@ -1,11 +0,0 @@
-{ system ? builtins.currentSystem, }:
-
-with import ./common.nix;
-
-let
-  pkgsHost = import pkgsSrc { };
-  kaniko = (import ./kaniko.nix) pkgsHost;
-  winscp = (import ./winscp.nix) pkgsHost;
-  manifestTool = (import ./manifest-tool.nix) pkgsHost;
-in [ kaniko winscp manifestTool ]
-
diff --git a/shell.nix b/shell.nix
index 6d6cc68f..0fa02b66 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,110 +5,48 @@ with import ./nix/common.nix;
 let
   pkgs = import pkgsSrc {
     inherit system;
-    overlays = [ cargo2nixOverlay ];
   };
-  kaniko = (import ./nix/kaniko.nix) pkgs;
-  manifest-tool = (import ./nix/manifest-tool.nix) pkgs;
   winscp = (import ./nix/winscp.nix) pkgs;
-
-in {
-  # --- Rust Shell ---
-  # Use it to compile Garage
-  rust = pkgs.mkShell {
+in
+{
+  # --- Dev shell inherited from flake.nix ---
+  devShell = devShells.default;
+
+  # --- Continuous integration shell ---
+  # The shell used for all CI jobs (along with devShell)
+  ci = pkgs.mkShell {
     nativeBuildInputs = with pkgs; [
-      #rustPlatform.rust.rustc
-      rustPlatform.rust.cargo
-      clang
-      mold
-      #clippy
-      rustfmt
-      #perl
-      #protobuf
-      #pkg-config
-      #openssl
-      file
-      #cargo2nix.packages.x86_64-linux.cargo2nix
-    ];
-  };
-
-  # --- Integration shell ---
-  # Use it to test Garage with common S3 clients
-  integration = pkgs.mkShell {
-    nativeBuildInputs = [
       winscp
-      pkgs.s3cmd
-      pkgs.awscli2
-      pkgs.minio-client
-      pkgs.rclone
-      pkgs.socat
-      pkgs.psmisc
-      pkgs.which
-      pkgs.openssl
-      pkgs.curl
-      pkgs.jq
-    ];
-  };
 
-  # --- Release shell ---
-  # A shell built to make releasing easier
-  release = pkgs.mkShell {
+      kaniko
+      manifest-tool
+      awscli2
+      file
+      s3cmd
+      minio-client
+      rclone
+      socat
+      psmisc
+      which
+      openssl
+      curl
+      jq
+    ];
     shellHook = ''
-      function refresh_toolchain {
-        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-        nix copy \
-          --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-          $(nix-store -qR \
-            $(nix-build --no-build-output --no-out-link nix/toolchain.nix))
-        rm /tmp/nix-signing-key.sec
-      }
-
-      function refresh_cache {
-        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-        for attr in clippy.amd64 test.amd64 pkgs.{amd64,i386,arm,arm64}.{debug,release}; do
-          echo "Updating cache for ''${attr}"
-          derivation=$(nix-instantiate --attr ''${attr})
-          nix copy -j8 \
-            --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-            $(nix-store -qR ''${derivation%\!bin})
-        done
-        rm /tmp/nix-signing-key.sec
-      }
-
-      function refresh_flake_cache {
-        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
-        for attr in packages.x86_64-linux.default devShell.x86_64-linux; do
-          echo "Updating cache for ''${attr}"
-          derivation=$(nix path-info --derivation ".#''${attr}")
-          nix copy -j8 \
-            --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
-            $(nix-store -qR ''${derivation})
-        done
-        rm /tmp/nix-signing-key.sec
-      }
-
       function to_s3 {
         aws \
             --endpoint-url https://garage.deuxfleurs.fr \
             --region garage \
           s3 cp \
             ./result-bin/bin/garage \
-            s3://garagehq.deuxfleurs.fr/_releases/''${DRONE_TAG:-$DRONE_COMMIT}/''${TARGET}/garage
-      }
-
-      function to_s3_woodpecker {
-        aws \
-            --endpoint-url https://garage.deuxfleurs.fr \
-            --region garage \
-          s3 cp \
-            ./result-bin/bin/garage \
             s3://garagehq.deuxfleurs.fr/_releases/''${CI_COMMIT_TAG:-$CI_COMMIT_SHA}/''${TARGET}/garage
       }
 
       function to_docker {
         executor  \
           --force \
-          --customPlatform="''${DOCKER_PLATFORM}" \
-          --destination "''${CONTAINER_NAME}:''${CONTAINER_TAG}" \
+          --customPlatform="$(echo "''${DOCKER_PLATFORM}" | sed 's/i386/386/')" \
+          --destination "$(echo "''${CONTAINER_NAME}" | sed 's/i386/386/'):''${CONTAINER_TAG}" \
           --context dir://`pwd` \
           --verbosity=debug
       }
@@ -167,7 +105,25 @@ in {
             s3://garagehq.deuxfleurs.fr/
       }
     '';
-    nativeBuildInputs = [ pkgs.awscli2 kaniko manifest-tool ];
+
+  };
+
+  # --- Cache shell ---
+  # A shell for refreshing caches
+  cache = pkgs.mkShell {
+    shellHook = ''
+      function refresh_cache {
+        pass show deuxfleurs/nix_priv_key > /tmp/nix-signing-key.sec
+        for attr in clippy.amd64 test.amd64 pkgs.{amd64,i386,arm,arm64}.release; do
+          echo "Updating cache for ''${attr}"
+          nix copy -j8 \
+            --to 's3://nix?endpoint=garage.deuxfleurs.fr&region=garage&secret-key=/tmp/nix-signing-key.sec' \
+            $(nix path-info ''${attr} --file default.nix --derivation --recursive | sed 's/\.drv$/.drv^*/')
+
+        done
+        rm /tmp/nix-signing-key.sec
+      }
+    '';
   };
 }