build(flake): pre-commit-hook for cargo shear

.github/workflows/unit-tests.yml

@@ -15,6 +15,17 @@ env:
   RUSTFLAGS: --deny warnings
   msrv: 1.78
 jobs:
+  cargo-shear:
+    name: Run cargo shear
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v17
+      - name: Enter DevShell
+        run: nix develop
+      - name: Nix Flake Check
+        run: cargo shear
   security_audit:
     runs-on: ubuntu-latest
     steps:

Cargo.toml

@@ -105,12 +105,10 @@ uutils_term_grid = "0.7.0"
 terminal_size = "0.4.2"
 timeago = { version = "0.4.2", default-features = false }
 unicode-width = "0.2"
-zoneinfo_compiled = "0.5.1"
 ansi-width = "0.1.0"
 serde = { version = "1.0.219", features = ["derive"] }
 dirs = "6.0.0"
 serde_norway = "0.9"
-backtrace = "0.3"
 
 [dependencies.git2]
 version = "0.20"

flake.nix

@@ -143,6 +143,8 @@
               # For generating demo
               vhs
 
+              cargo-shear
+
               powertest.packages.${pkgs.system}.default
 
               cargo-hack
@@ -177,6 +179,19 @@
                   entry = with pkgs; "${reuse}/bin/reuse lint";
                   pass_filenames = false;
                 };
+                "cargo-shear" = {
+                  enable = true;
+                  name = "Check for unused dependencies";
+                  extraPackages = [ toolchain ];
+                  files = "\\.(rs|toml)$";
+                  entry = pkgs.lib.getExe (
+                    pkgs.writeShellScriptBin "cargo-shear-hook" ''
+                         set -e
+                         export CARGO_NET_OFFLINE=true
+                         ${pkgs.lib.getExe pkgs.cargo-shear} "$@"
+                      . ''
+                  );
+                };
               };
             };
           formatting = treefmtEval.config.build.check self;