feat(templates): add a template for rust

To use it, run:
```
nix flake init -t github:fcuny/world#rust
```

8 files changed, 181 insertions, 0 deletions

diff --git a/templates/default.nix b/templates/default.nix
new file mode 100644
index 0000000..38c4877
--- /dev/null
+++ b/templates/default.nix
@@ -0,0 +1,6 @@
+{
+  rust = {
+    description = "Simple rust package";
+    path = ./rust;
+  };
+}
diff --git a/templates/rust/.envrc b/templates/rust/.envrc
new file mode 100644
index 0000000..a5dbbcb
--- /dev/null
+++ b/templates/rust/.envrc
@@ -0,0 +1 @@
+use flake .
diff --git a/templates/rust/.github/dependabot.yml b/templates/rust/.github/dependabot.yml
new file mode 100644
index 0000000..2b2ebcf
--- /dev/null
+++ b/templates/rust/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+- package-ecosystem: cargo
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: "weekly"
diff --git a/templates/rust/.github/workflows/build.yml b/templates/rust/.github/workflows/build.yml
new file mode 100644
index 0000000..f449190
--- /dev/null
+++ b/templates/rust/.github/workflows/build.yml
@@ -0,0 +1,73 @@
+name: gh-ssh-keys CI
+
+on:
+  push:
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: check
+      - uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --no-default-features
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --no-default-features
+
+  fmt:
+    name: Rustfmt
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: rustup component add rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+  clippy:
+    name: Clippy
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+      - run: rustup component add clippy
+      - uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: -- -D warnings
diff --git a/templates/rust/LICENSE b/templates/rust/LICENSE
new file mode 100644
index 0000000..ac375e1
--- /dev/null
+++ b/templates/rust/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2022 Franck Cuny
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
new file mode 100644
index 0000000..49c2f76
--- /dev/null
+++ b/templates/rust/flake.nix
@@ -0,0 +1,66 @@
+{
+  description = "A CLI to manage public SSH keys for GitHub.";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    naersk.url = "github:nmattia/naersk";
+  };
+
+  outputs =
+    { self
+    , flake-utils
+    , nixpkgs
+    , naersk
+    , rust-overlay
+    }:
+
+    flake-utils.lib.eachDefaultSystem
+      (system:
+      let
+        overlays = [ (import rust-overlay) ];
+        pkgs = import nixpkgs { inherit system overlays; };
+        rust-toolchain =
+          (pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml).override {
+            extensions = [ "rust-src" ];
+          };
+        naersk-lib = naersk.lib."${system}".override {
+          rustc = rust-toolchain;
+        };
+      in
+      rec
+      {
+        packages.gh-ssh-keys = naersk-lib.buildPackage {
+          pname = "gh-ssh-keys";
+          root = ./.;
+          buildInputs = with pkgs; [
+            pkg-config
+            openssl
+          ];
+        };
+
+        defaultPackage = packages.gh-ssh-keys;
+
+        devShell = pkgs.mkShell {
+          nativeBuildInputs = with pkgs; [
+            rust-toolchain
+            openssl
+            pkg-config
+            cargo-audit
+            cargo-deny
+            cargo-cross
+            rust-analyzer
+          ] ++ pkgs.lib.optionals (pkgs.stdenv.isLinux) (with pkgs; [ cargo-watch ]);
+
+          shellHook = ''
+            cargo --version
+          '';
+        };
+      })
+    // {
+      overlay = final: prev: {
+        gh-ssh-keys = self.defaultPackage.${prev.system};
+      };
+    };
+}
diff --git a/templates/rust/rust-toolchain.toml b/templates/rust/rust-toolchain.toml
new file mode 100644
index 0000000..e7ae097
--- /dev/null
+++ b/templates/rust/rust-toolchain.toml
@@ -0,0 +1,3 @@
+[toolchain]
+channel = "1.64.0"
+components = [ "rustfmt", "clippy" ]
diff --git a/templates/rust/rustfmt.toml b/templates/rust/rustfmt.toml
new file mode 100644
index 0000000..3a26366
--- /dev/null
+++ b/templates/rust/rustfmt.toml
@@ -0,0 +1 @@
+edition = "2021"